ORCID Profile
0000-0001-6741-3609
Current Organisation
Griffith University
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Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Functional Materials | Materials Engineering | Nanomaterials | Composite and Hybrid Materials | Electrochemistry | Microtechnology | Nanochemistry and Supramolecular Chemistry |
ANZSRC Socio-Economic Objective (SEO)
Expanding Knowledge in Engineering | Expanding Knowledge in the Chemical Sciences | Inorganic Industrial Chemicals | Environmentally Sustainable Mineral Resource Activities not elsewhere classified | Residential Energy Conservation and Efficiency | Solar-Photovoltaic Energy | Structural Glass and Glass Products | Integrated Circuits and Devices | Environmentally Sustainable Manufacturing not elsewhere classified | Manufacturing not elsewhere classified | Expanding Knowledge in Technology
Related Links
Publications
A Multifunctional Wearable Device with a Graphene/Silver Nanowire Nanocomposite for Highly Sensitive Strain Sensing and Drug Delivery
Publisher: MDPI AG
Date: 04-04-2019
DOI: 10.3390/C5020017
Abstract: Advances in wearable, highly sensitive and multifunctional strain sensors open up new opportunities for the development of wearable human interface devices for various applications such as health monitoring, smart robotics and wearable therapy. Herein, we present a simple and cost-effective method to fabricate a multifunctional strain sensor consisting of a skin-mountable dry adhesive substrate, a robust sensing component and a transdermal drug delivery system. The sensor has high piezoresisitivity to monitor real-time signals from finger bending to ulnar pulse. A transdermal drug delivery system consisting of polylactic-co-glycolic acid nanoparticles and a chitosan matrix is integrated into the sensor and is able to release the nanoparticles into the stratum corneum at a depth of ~60 µm. Our approach to the design of multifunctional strain sensors will lead to the development of cost-effective and well-integrated multifunctional wearable devices.
UV-visible-near infrared photoabsorption and photodetection using close-packed metallic gold nanoparticle network
Publisher: AIP Publishing
Date: 03-2010
DOI: 10.1063/1.3310367
Abstract: Photocurrent generation and photodetection are usually based on semiconductor crystals including Si, CdS, and PbS. This work reports the enhanced photoabsorption and photodetection of close-packed metallic Au nanoparticles (NPs) in the UV-VIS (visible)-NIR (near infrared) region. Photoabsorption in the UV-VIS regions is associated with the interband transition and surface plasmon resonance of AuNPs, while the enhanced NIR absorption is due to the collective effect of interacting AuNPs in the close-packed network. Consequently, the AuNPs exhibits photodetection behavior in the wavelength range of 300–1500 nm. It is proposed that the inter-AuNP photoejection and delocalization of electron-hole pairs changes the carrier lifetime and transit dynamics in favor of photocarrier conduction, thus significantly facilitating photocurrent generation in the metallic AuNP close-pack. Moreover, due to the power-law conduction mechanism in AuNP networks, the quantum yield of AuNPs can be tuned from 10−6 to 10−1 photoelectron hoton by increasing the bias voltage from 0 to 5 V. The AuNP quantum yield of 10−1 at 5 V is as high as that of commercial Si photodetectors at 0 V, and this demonstrates the immediate applicability of AuNPs in photodetection. In view of the compatibility of AuNPs with wet-chemistry and inkjet printing processes at low temperatures, metallic AuNPs may provide a convenient alternative to semiconductor crystals in photodetection and perhaps photovoltaic applications.
Ca2+ and Ga3+ doped LaMnO3 perovskite as a highly efficient and stable catalyst for two-step thermochemical water splitting
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C6SE00097E
Abstract: High performance and stable catalysts for two-step thermochemical water splitting are key to synthesising direct fuels in the form of H 2 or liquid hydrocarbon fuels by the Fischer–Tropsch process.
Pathways to Next‐Generation Fire‐Safe Alkali‐Ion Batteries
Publisher: Wiley
Date: 19-06-2023
Abstract: High energy and power density alkali‐ion (i.e., Li + , Na + , and K + ) batteries (AIBs), especially lithium‐ion batteries (LIBs), are being ubiquitously used for both large‐ and small‐scale energy storage, and powering electric vehicles and electronics. However, the increasing LIB‐triggered fires due to thermal runaways have continued to cause significant injuries and casualties as well as enormous economic losses. For this reason, to date, great efforts have been made to create reliable fire‐safe AIBs through advanced materials design, thermal management, and fire safety characterization. In this review, the recent progress is highlighted in the battery design for better thermal stability and electrochemical performance, and state‐of‐the‐art fire safety evaluation methods. The key challenges are also presented associated with the existing materials design, thermal management, and fire safety evaluation of AIBs. Future research opportunities are also proposed for the creation of next‐generation fire‐safe batteries to ensure their reliability in practical applications.
Oxygen‐Terminated Nanocrystalline Diamond Film as an Efficient Anode in Photovoltaics
Publisher: Wiley
Date: 14-04-2010
Optimizing Biosensing Properties on Undecylenic Acid-Functionalized Diamond
Publisher: American Chemical Society (ACS)
Date: 10-04-2007
DOI: 10.1021/LA063658K
Abstract: The optimization of biosensing efficiency on a diamond platform depends on the successful coupling of biomolecules on the surface, and also on effective signal transduction in the biorecognition events. In terms of biofunctionalization of diamond surfaces, surface electrochemical studies of diamond modified with undecylenic acid (UA), with and without headgroup protection, were performed. The direct photochemical coupling method employing UA was found to impart a higher density of carboxylic acid groups on the diamond surface compared to that using trifluoroethyl undecenoate (TFEU) as the protecting group during the coupling process. Non-faradic impedimetric DNA sensing revealed that lightly doped diamond gives better signal transduction sensitivity compared to highly doped diamond.
Electrochemically-derived graphene oxide membranes with high stability and superior ionic sieving
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C8CC09970G
Abstract: Crosslinker-free electrochemically-derived graphene oxide membranes are found to be extraordinarily stable in aqueous solutions and exhibit superior ionic sieving performance.
A focus review on 3D printing of wearable energy storage devices
Publisher: Wiley
Date: 18-05-2022
DOI: 10.1002/CEY2.199
Abstract: Three‐dimensional (3D) printing has gained popularity in a variety of applications, particularly in the manufacture of wearable devices. Aided by the large degree of freedom in customizable fabrication, 3D printing can cater towards the practical requirements of wearable devices in terms of light weight and flexibility. In particular, this focus review aims to cover the important aspect of wearable energy storage devices (WESDs), which is an essential component of most wearable devices. Herein, the topics discussed are the fundamentals of 3D printing inks used, the optimizing strategies in improving the mechanical and electrochemical properties of wearable devices and the recent developments and challenges of wearable electrochemical systems such as batteries and supercapacitors. It can be expected that, with the development of 3D printing technology, realization of the full potential of WESDs and seamless integration into smart devices also needs further in‐depth investigations.
Back Cover Image, Volume 5, Number 10, October 2023
Publisher: Wiley
Date: 10-2023
DOI: 10.1002/CEY2.476
Cover Image, Volume 5, Number 10, October 2023
Publisher: Wiley
Date: 10-2023
DOI: 10.1002/CEY2.475
Phosphorus and Sulfur Co‐Doped Cobaltous Oxide Synthesized by an Inorganic‐Salt‐Assisted Method: Reaction Mechanism and Electrocatalytic Application
Publisher: Wiley
Date: 07-2020
Flexible and stretchable inorganic electronics: Conductive materials, fabrication strategy, and applicable devices
Publisher: Elsevier
Date: 2020
The role of electrolyte acid concentration in the electrochemical exfoliation of graphite: Mechanism and synthesis of electrochemical graphene oxide
Publisher: Elsevier BV
Date: 09-2019
Enhanced Electrohydrodynamics for Electrospinning a Highly Sensitive Flexible Fiber-Based Piezoelectric Sensor
Publisher: American Chemical Society (ACS)
Date: 07-03-2022
Next-generation applications for integrated perovskite solar cells
Publisher: Springer Science and Business Media LLC
Date: 05-01-2023
DOI: 10.1038/S43246-022-00325-4
Abstract: Organic/inorganic metal halide perovskites attract substantial attention as key materials for next-generation photovoltaic technologies due to their potential for low cost, high performance, and solution processability. The unique properties of perovskites and the rapid advances that have been made in solar cell performance have facilitated their integration into a broad range of practical applications, including tandem solar cells, building-integrated photovoltaics, space applications, integration with batteries and supercapacitors for energy storage systems, and photovoltaic-driven catalysis. In this Review, we outline notable achievements that have been made in these photovoltaic-integrated technologies. Outstanding challenges and future perspectives for the development of these fields and potential next-generation applications are discussed.
Sustainable Recycling of Formic Acid by Bio-Catalytic CO2 Capture and Re-Hydrogenation
Publisher: MDPI AG
Date: 05-2019
DOI: 10.3390/C5020022
Abstract: Formic acid (FA) is a promising reservoir for hydrogen storage and distribution. Its dehydrogenation releases CO2 as a by-product, which limits its practical application. A proof of concept for a bio-catalytic system that simultaneously combines the dehydrogenation of formic acid for H2, in-situ capture of CO2 and its re-hydrogenation to reform formic acid is demonstrated. Enzymatic reactions catalyzed by carbonic anhydrase (CA) and formate dehydrogenase (FDH) under ambient condition are applied for in-situ CO2 capture and re-hydrogenation, respectively, to develop a sustainable system. Continuous production of FA from stripped CO2 was achieved at a rate of 40% using FDH combined with sustainable co-factor regeneration achieved by electrochemistry. In this study, the complete cycle of FA dehydrogenation, CO2 capture, and re-hydrogenation of CO2 to FA has been demonstrated in a single system. The proposed bio-catalytic system has the potential to reduce emissions of CO2 during H2 production from FA by effectively using it to recycle FA for continuous energy supply.
Doping Strategies in Sb2 S3 Thin Films for Solar Cells
Publisher: Wiley
Date: 19-06-2021
Abstract: Sb 2 S 3 is an attractive solar absorber material that has garnered tremendous interest because of its fascinating properties for solar cells including suitable band gap, high absorption coefficient, earth abundance, and excellent stability. Over the past several years, intensive efforts have been made to enhance the photovoltaic efficiencies of Sb 2 S 3 solar cells using many promising approaches including interfacial engineering, surface passivation, additive engineering, and band‐gap engineering of the charge transport layers and active light absorbing Sb 2 S 3 materials. Recently, doping strategies in Sb 2 S 3 light absorbers have gained attention as they promise to play important roles in controlling band gap, regulating film morphology, and passivating grain boundaries, and thus resulting in enhanced carrier transport, which is one of the most challenging issues in this cutting‐edge research field. In this review, after a brief introduction to Sb 2 S 3 , an overview of Sb 2 S 3 solar cells and their fundamental properties are provided. Recent advances in doping strategies in Sb 2 S 3 thin films and solar cells are then discussed to provide in‐depth understanding of the effects of various dopants on the photovoltaic properties of Sb 2 S 3 materials. In conclusion, the personal perspectives and outlook to the future development of Sb 2 S 3 solar cells are provided.
Ultrastable Zinc Anode Enabled by CO2-Induced Interface Layer
Publisher: American Chemical Society (ACS)
Date: 06-09-2022
Abstract: Aqueous Zn-ion batteries (AZIBs), being safe, inexpensive, and pollution-free, are a promising candidate for future large-scale sustainable energy storage. However, in a conventional AZIBs setup, the Zn metal anode suffers oxidative corrosion, side reactions with electrolytes, disordered dendrite growth during operation, and consequently low efficiency and short lifespan. In this work, we discover that purging CO
A novel carbazole derivative containing fluorobenzene unit: aggregation-induced fluorescence emission, polymorphism, mechanochromism and non-reversible thermo-stimulus fluorescence
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8CE00025E
Abstract: Different conformations and packing modes induce the compound with unique stimuli-responsive properties.
Efficient Excitation of Multiple Plasmonic Modes on Three-Dimensional Graphene: An Unexplored Dimension
Publisher: American Chemical Society (ACS)
Date: 27-09-2016
Atomically Doped 2D Black Phosphorus for Efficient and Stable Perovskite Solar Cells
Publisher: Wiley
Date: 17-10-2023
Design of three-dimensional hierarchical TiO2/SrTiO3 heterostructures towards selective CO2 photoreduction
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9QI00350A
Abstract: 3D hierarchical TiO 2 /SrTiO 3 spheres have been constructed by sequential templating approach and exhibit superb photocatalytic activity and remarkable selectivity.
Scalable Production of Graphene Oxide Using a 3D-Printed Packed-Bed Electrochemical Reactor with a Boron-Doped Diamond Electrode
Publisher: American Chemical Society (ACS)
Date: 23-01-2019
Diamond-Based Molecular Platform for Photoelectrochemistry
Publisher: American Chemical Society (ACS)
Date: 24-12-2008
DOI: 10.1021/JA805977F
Abstract: Boron doped diamond (BDD) thin film was found to exhibit higher photocurrent conversion efficiencies and photostability compared to commonly used transparent conducting oxides (ITO and FTO) owing to the matching energy levels and strong C-C bonding at the organic/diamond interface.
Enhanced Thermochemical Water Splitting through Formation of Oxygen Vacancy in La0.6Sr0.4BO3−δ (B=Cr, Mn, Fe, Co, and Ni) Perovskites
Publisher: Wiley
Date: 10-07-2018
Abstract: Oxygen vacancies in catalyst systems play a crucial role in manipulating pivotal redox properties that are strongly dependent on the composition of the material. Herein, for the first time, experimental evidence of a linear correlation between the extent of oxygen vacancy formation in the La
One-step solid phase synthesis of a highly efficient and robust cobalt pentlandite electrocatalyst for the oxygen evolution reaction
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6TA07962H
Abstract: One-step concurrent growth of a Co 9 S 8 /carbon nanosheet composite as an efficient and robust oxygen evolution electrocatalyst.
Enhanced electrochemical production and facile modification of graphite oxide for cost-effective sodium ion battery anodes
Publisher: Elsevier BV
Date: 06-2021
Atomic Modulation and Structure Design of Fe−N4 Modified Hollow Carbon Fibers with Encapsulated Ni Nanoparticles for Rechargeable Zn–Air Batteries
Publisher: Wiley
Date: 30-10-2022
Abstract: Excellent bifunctional oxygen reduction reaction (ORR)/oxygen evolution reaction (OER) activity and rapid mass transport capability are two important parameters of electrocatalysts for high‐performance rechargeable Zn–air batteries (ZABs). Herein, an efficient atomic modulation and structure design to promote bifunctional activity and mass transport kinetics of an ORR/OER electrocatalyst are reported. Specifically, atomic Fe−N 4 moieties are immobilized on premade hollow carbon fibers with encapsulated Ni nanoparticles (Fe‐N@Ni‐HCFs). Synchrotron X‐ray absorption spectroscopy and spherical aberration‐corrected electron microscope analyses confirm the atomic distribution of the active sites and unique lung bubble‐like hollow architecture of the catalyst, while theoretical investigations reveal that the encapsulated Ni nanoparticles can induce electron distribution of the atomic Fe−N 4 moieties to reduce reaction energy barriers. As a result, the prepared catalyst possesses enhanced bifunctional ORR/OER activity and well‐constructed gas–solid–liquid interfaces for improved mass transfer. These synergetic advantages endow the binder‐free Fe‐N@Ni‐HCFs electrode with the remarkable power density and cycling stability for ZABs, outperforming the commercial Pt/C+Ir/C benchmark. This exceptional performance suggests that the proposed strategy can be extended to the design and fabrication of electrocatalysts for energy conversion and storage.
Electrostatically Self-Assembled Polyoxometalates on Molecular-Dye-Functionalized Diamond
Publisher: American Chemical Society (ACS)
Date: 02-12-2009
DOI: 10.1021/JA908131T
Abstract: We have successfully immobilized phosphotungstic acid (PTA), a polyoxometalate, on the surface of boron-doped diamond (BDD) surface through electrostatic self-assembly of PTA on pyridinium dye-functionalized-BDD. The inorganic/organic bilayer structure on BDD is found to exhibit fast surface-confined reversible electron transfer. The molecular dye-grafted BDD can undergo controllable electrical stripping and regeneration of PTA which can be useful for electronics or sensing applications. Furthermore, we have demonstrated the use of PTA as a molecular switch in which the direction of photocurrent from diamond to methyl viologen is reversed by the surface bound PTA. Robust photocurrent converter based on such molecular system-diamond platform can operate in corrosive medium which is not tolerated by indium tin oxide electrodes.
Echocardiographic study of myocardial work in patients with type 2 diabetes mellitus
Publisher: Springer Science and Business Media LLC
Date: 17-02-2022
DOI: 10.1186/S12872-022-02482-3
Abstract: A noninvasive left ventricular (LV) pressure-strain loop (PSL) provides a new method to quantify myocardial work (MW) by combining global longitudinal strain (GLS) and LV pressure, which exerts potential advantages over traditional GLS. We studied the LV PSL and MW in patients with type 2 diabetes mellitus (T2DM). This cross-sectional study included 201 subjects (54 healthy controls and 147 T2DM patients) who underwent complete two-dimensional echocardiography (2DE), including 2D speckle-tracking echocardiography (STE), as well as brachial artery pulse pressure measurement. The PSL was used to determine the global myocardial work index (GWI), global constructive work (GCW), global wasted work (GWW), and global work efficiency (GWE) of all study participants. The association between T2DM and LV function was evaluated according to these MW indices. The GLS was significantly lower in the T2DM group than in the control group ( P 0.001), indicating that the LV myocardium had been damaged, although the LV ejection fraction (LVEF) was still normal. The GWI and GWE were decreased ( P = 0.022) and the GWW was increased ( P 0.001) in diabetic patients compared with controls, but the GCW was comparable in the two groups ( P = 0.160). In all diabetic patients, age, body mass index, systolic blood pressure, smoking history, and LVEF were correlated with GWI, GWW and GWE. The use of LV PSL is a novel noninvasive technique that could help to depict the relationship between LV myocardial damage and MW in patients with T2DM.
The Chemistry of CH Bond Activation on Diamond
Publisher: Wiley
Date: 07-2010
Abstract: The surface of hydrogen-terminated diamond resembles a solid hydrocarbon substrate. Interestingly, the C-H bonds on the diamond surface are not as unreactive as that of saturated hydrocarbon molecules owing to its unique surface electronic properties. The invention of C-H bond activation and C-C coupling reactions on the diamond surface allows chemists to develop powerful chemical transistors, biosensors, and photovoltaic cells on the diamond platform.
Elemental 2D Materials: Solution-Processed Synthesis and Applications in Electrochemical Ammonia Production
Publisher: Wiley
Date: 08-10-2021
Abstract: Graphene and related elemental 2D materials have become core materials in nanotechnology and shown great promise for industrially important electrocatalysis reactions. Although excellent progress has been made over the past few years, research into the field of elemental 2D materials beyond graphene is still at an early stage. Importantly, recent research has revealed the promising efficacy of elemental 2D materials as effective nitrogen reduction reaction (NRR) electrocatalysts due to their many excellent properties including high surface activities, acting as active sites for effective functionalization and defect engineering. This review provides a comprehensive account of recent advances in elemental 2D materials with a major focus on the solution‐based synthesis routes and their applications in electrocatalytic NRR for ammonia (NH 3 ) production. After a concise overview of elemental 2D materials, the advantages and challenges of currently available methods for the synthesis of these 2D materials are discussed. Then, the review focuses on the use of these emerging 2D materials in the electrocatalytic reduction of N 2 for sustainable (NH 3 ) synthesis. Finally, the challenges still to be addressed, and important perspectives in this attractive field are emphasized.
Single-Atom Electrocatalysts for Lithium Sulfur Batteries: Progress, Opportunities, and Challenges
Publisher: American Chemical Society (ACS)
Date: 05-10-2020
A Liquid Metal Microdroplets Initialized Hemicellulose Composite for 3D Printing Anode Host in Zn-Ion Battery
Publisher: Wiley
Date: 28-04-2023
Abstract: Maintaining a steady affinity between gallium‐based liquid metals (LM) and polymer binders, particularly under continuous mechanical deformation, such as extrusion‐based 3D printing or plating/stripping of Zinc ion (Zn 2+ ), is very challenging. Here, an LM‐initialized polyacrylamide‐hemicellulose/EGaIn microdroplets hydrogel is used as a multifunctional ink to 3D‐print self‐standing scaffolds and anode hosts for Zn‐ion batteries. The LM microdroplets initiate acrylamide polymerization without additional initiators and cross‐linkers, forming a double‐covalent hydrogen‐bonded network. The hydrogel acts as a framework for stress dissipation, enabling recovery from structural damage due to the cyclic plating/stripping of Zn 2+ . The LM‐microdroplet‐initialized polymerization with hemicelluloses can facilitate the production of 3D printable inks for energy storage devices.
Defect Passivation by Pyridine-Carbazole Molecules for Efficient and Stable Perovskite Solar Cells
Publisher: American Chemical Society (ACS)
Date: 14-12-2022
Green and scalable electrochemical routes for cost‐effective mass production of MXenes for supercapacitor electrodes
Publisher: Wiley
Date: 31-01-2023
DOI: 10.1002/CEY2.295
Abstract: One of the most unique properties of two‐dimensional carbides and nitrides of transition metals (MXenes) is their excellent water dispersibility and yet possessing superior electrical conductivity but their industrial‐scale application is limited by their costly chemical synthesis methods. In this work, the niche feature of MXenes was capitalized in the packed‐bed electrochemical reactor to produce MXenes at an unprecedented reaction rate and yield with minimal chemical waste. A simple NH 4 F solution was employed as the green electrolyte, which could be used repeatedly without any loss in its efficacy. Surprisingly, both fluoride and ammonium were found to play critical roles in the electrochemical etching, functionalization, and expansion of the layered parent materials (MAXs) through which the liberation of ammonia gas was observed. The electrochemically produced MXenes with excellent conductivity, applied as supercapacitor electrodes, could deliver an ultrahigh volumetric capacity (1408 F cm −3 ) and a volumetric energy density (75.8 Wh L −1 ). This revolutionary green, energy‐efficient, and scalable electrochemical route will not only pave the way for industrial‐scale production of MXenes but also open up a myriad of versatile electrochemical modifications for improved functional MXenes.
Graphene-Like Monoelemental 2D Materials for Perovskite Solar Cells
Publisher: Wiley
Date: 12-02-2023
Abstract: Perovskite solar cells (PSCs) have attracted a great deal of attention from the photovoltaic (PV) community because of their remarkable performance, low production cost, and high potential to be integrated into other optoelectronic applications. Despite their promise, the challenges associated with their operational stability have drawn increasing attention over the past decade. Owing to their unique structure and fascinating properties such as high charge mobility, excellent conductivity, tunable bandgap, good optical transparency, and optimal surface functionalization, nanostructured materials, in particular monoelemental 2D materials, have recently been demonstrated to play versatile functions in suppressing the degradation of PSCs and enhancing the PV performance of the devices. In this review, recent advances in perovskite solar cells employing monoelemental 2D materials are presented. A brief overview of perovskite light absorbers based PV devices is first introduced, followed by critical discussions on the use of various elemental 2D materials including graphene, phosphorene, antimonene, borophene, bismuthene, and their derivatives for different components of the perovskite solar cells. Finally, the challenges in this cutting‐edge research area are highlighted, and the authors express their own perspectives on addressing these key issues.
Large area, continuous, few-layered graphene as anodes in organic photovoltaic devices
Publisher: AIP Publishing
Date: 10-08-2009
DOI: 10.1063/1.3204698
Abstract: Large-area, continuous, transparent, and highly conducting few-layered graphene films produced by chemical vapor deposition method were used as anode for application in photovoltaic devices. The noncovalent modification of the graphene films with pyrene buanoic acid succidymidyl ester improved the power conversion efficiency (PCE) to 1.71%. This performance corresponds to ∼55.2% of the PCE of a control device based on indium tin oxide (ITO) oly(3,4–ethylenedioxythiophene):poly(styrenesulfonate) oly(3-hexyl)thiophene: phenyl-C61-butyric acid methyl ester/LiF/Al electrodes (PCE=3.1%). This finding paves the way for the substitution of ITO in photovoltaic and electroluminescent devices with low cost graphene films.
Suzuki Coupling of Aryl Organics on Diamond
Publisher: American Chemical Society (ACS)
Date: 02-04-2008
DOI: 10.1021/CM703686W
Facile Synthesis of Boron-Doped Reduced Electrochemical Graphene Oxide for Sodium Ion Battery Anode
Publisher: Springer Science and Business Media LLC
Date: 07-06-2021
Mild and Efficient Functionalization of Hydrogen-Terminated Si(111) via Sonochemical Activated Hydrosilylation
Publisher: American Chemical Society (ACS)
Date: 11-05-2011
DOI: 10.1021/JA2020839
Abstract: Efficient chemical functionalization of hydrogen-terminated Si(111) with simple and bifunctional 1-alkenes was achieved via novel sonochemical activated hydrosilylation, utilizing just a simple ultrasonic bath. It is an extremely mild method that allows the specific attachment of unprotected bifunctional alkenes such as undecenol, undecylenic acid, and even a heat/UV-sensitive alkene, bearing an activated leaving group (N-succinimidyl undecylenate), without suffering any degradation.
Electrochemically Exfoliated Platinum Dichalcogenide Atomic Layers for High-Performance Air-Stable Infrared Photodetectors
Publisher: American Chemical Society (ACS)
Date: 11-02-2021
Metal Carbide‐Based Cocatalysts for Photocatalytic Solar‐to‐Fuel Conversion
Publisher: Wiley
Date: 07-10-2022
Abstract: Semiconductor‐based photocatalytic solar‐to‐fuel conversion has proven an appealing strategy for achieving carbon‐neutral and green‐hydrogen production. However, almost all semiconductors exhibit unsatisfactory photocatalytic performance due to insufficient surface‐active sites, weak selectivity, and fast charge‐carrier recombination. For these reasons, cocatalyst loading has become an encouraging strategy for improving photocatalytic activity and selectivity. Owing to the scarcity, and cost of noble metal‐based cocatalysts, utilization of low‐cost noble‐metal‐free cocatalysts, such as metal carbide‐based cocatalysts, has aroused tremendous attention. This review highlights some recent crucial advances in active metal carbide‐based cocatalysts for photocatalytic solar‐to‐fuel conversion. First, the fundamentals of metal carbide‐based cocatalysts are presented, including the photocatalytic mechanism, advantages, drawbacks, and design rules. Second, three synthesis approaches of high‐active metal carbide‐based cocatalysts, namely constructing metal carbide nanostructures, epitaxial synthesis of metal carbides on nanostructured carbon, and crystal imperfection construction on metal carbides, are thoroughly addressed. Subsequently, applications of metal carbide‐based cocatalysts in photocatalytic hydrogen production, CO 2 reduction, and nitrogen reduction are further discussed. Finally, the crucial challenges and important directions of metal carbide‐based cocatalysts for photocatalytic solar‐to‐fuel conversion are proposed. This review demonstrates some new options for rationally designing and developing novel and efficient metal carbide‐based cocatalysts for highly active and selective photocatalytic solar‐to‐fuel conversion.
Fluorescent Nanogel of Arsenic Sulfide Nanoclusters
Publisher: Wiley
Date: 07-08-2009
Direct Photochemical Functionalization of Si(111) with Undecenol
Publisher: American Chemical Society (ACS)
Date: 26-01-2011
DOI: 10.1021/LA104143R
Abstract: Direct UV photochemical functionalization of H-terminated Si(111) with bifunctional 10-undecen-1-ol was achieved with selective attachment via its vinyl end, resulting in the formation of a compact monolayer with free terminal alcohol groups. This is due to the faster radical propagation mechanism in hydrosilylation with alkene compared to the nucleophilic attack mechanism of alcohol, which is impeded by intermolecular hydrogen bonding present at room temperature. Evidence from X-ray photoelectron spectroscopy, infrared spectroscopy, and resistance to fluoride etching shows that Si-C is the interfacial bond, and atomic force microscopy shows the presence of a smooth, uniform monolayer conforming to the atomic terraces of the Si(111) surface. The application of such a hydroxyl-terminated monolayer was demonstrated by tethering a bromoinitiator through surface esterification and thereafter subjecting the surface to the surface-initiated atom-transfer radical polymerization of butyl methacrylate. The poly(butyl methacrylate) brushes formed were found to be smooth (R(a) < 0.3 nm) and uniform even for a thin film of 4.0 nm.
Defect Engineering in Titanium-Based Oxides for Electrochemical Energy Storage Devices
Publisher: Springer Science and Business Media LLC
Date: 28-02-2020
Recent Advances in Perovskite-Based Building-Integrated Photovoltaics
Publisher: Wiley
Date: 23-06-2020
W18O49 nanowires-graphene nanocomposite for asymmetric supercapacitors employing AlCl3 aqueous electrolyte
Publisher: Elsevier BV
Date: 04-2021
Electrolyte Effect on Electrocatalytic Hydrogen Evolution Performance of One-Dimensional Cobalt-Dithiolene Metal-Organic Frameworks: A Theoretical Perspective
Publisher: American Chemical Society (ACS)
Date: 27-03-2018
Etching Strategy for Photocatalysis: The Evolution of Structures and Properties
Publisher: Wiley
Date: 05-09-2023
Abstract: This review explores the critical role of etching strategies in the evolution of structures and properties in photocatalysis, a technology offering sustainable energy solutions and environmental remediation. In the face of fossil fuel‐induced environmental issues, photocatalysis presents a promising avenue. However, enhancing photocatalytic activity remains challenging and necessitates advanced methodologies, among which etching strategies have shown great promise. Etching introduces structural vacancies, exposes active crystal facets, and fabricates nanostructures with high specific surfaces, effectively improving the light absorption and catalytic properties of photocatalysts. Despite the substantial advancements in this field, comprehensive reviews elucidating the impact of etching on photocatalysts are scarce. Thus, this review primarily focuses on the influence of various etching strategies on the structural and catalytic properties of photocatalysts. It delves into the mechanisms of morphology control, surface area enhancement, crystal structure modification, defect engineering, and surface chemistry modification through etching. The review further discusses the effect of etching on light absorption, charge separation and migration, and the adsorption and activation of reactants. It concludes by addressing the challenges and future directions of etching strategy in photocatalysis, aiming to enhance the reader’s understanding of etching modification and synthesis of photocatalysts for specific applications. This comprehensive review should aid in the development of more efficient photocatalytic materials and pave the way for breakthroughs in renewable energy technology. This article is protected by copyright. All rights reserved.
Syntheses and catalytic activities of Group 4 metal complexes derived from C(cage)-appended cyclohexyloxocarborane trianion
Publisher: Elsevier BV
Date: 06-2005
A versatile PDMS submicrobead/graphene oxide nanocomposite ink for the direct ink writing of wearable micron-scale tactile sensors
Publisher: Elsevier BV
Date: 09-2019
Wavelength-tunable waveguides based on polycrystalline organic-inorganic perovskite microwires
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5NR06262D
Abstract: Polycrystalline hybrid organic–inorganic perovskite microwires have been demonstrated as optical waveguides with small optical loss and broad wavelength tunability.
Hollow Melon‐Seed‐Shaped Lithium Iron Phosphate Micro‐ and Sub‐Micrometer Plates for Lithium‐Ion Batteries
Publisher: Wiley
Date: 02-04-2014
Abstract: Melon-seed-shaped LiFePO4 hollow micro- and sub-micrometer plates have been synthesized via a polyol-assisted hydrothermal method. The as-prepared LiFePO4 hollow materials were new with regard to their single-crystalline shells with large ac surfaces. Based on the detailed analysis of time-dependent studies, a possible growth mechanism was proposed involving nucleation, anisotropic growth, selective etching, and reversed recrystallization. The effects of polyol concentration, reaction temperature, and feeding sequence of precursors on the growth of LiFePO4 materials were investigated. The electrochemical properties of as-prepared LiFePO4 hollow materials were examined as cathode materials.
Substituent Effects on the Kinetics of Bifunctional Styrene SAM Formation on H-Terminated Si
Publisher: American Chemical Society (ACS)
Date: 23-06-2014
DOI: 10.1021/LA501417S
Encapsulation of Plasmid DNA by Nanoscale Metal–Organic Frameworks for Efficient Gene Transportation and Expression
Publisher: Wiley
Date: 03-06-2019
Abstract: The intracellular delivery and functionalization of genetic molecules play critical roles in gene-based theranostics. In particular, the delivery of plasmid DNA (pDNA) with safe nonviral vectors for efficient intracellular gene expression has received increasing attention however, it still has some limitations. A facile one-pot method is employed to encapsulate pDNA into zeolitic imidazole framework-8 (ZIF-8) and ZIF-8-polymer vectors via biomimetic mineralization and coprecipitation. The pDNA molecules are found to be well distributed inside both nanostructures and benefit from their protection against enzymatic degradation. Moreover, through the use of a polyethyleneimine (PEI) 25 kD capping agent, the nanostructures exhibit enhanced loading capacity, better pH responsive release, and stronger binding affinity to pDNA. From in vitro experiments, the cellular uptake and endosomal escape of the protected pDNA are greatly improved with the superior ZIF-8-PEI 25 kD vector, leading to successful gene expression with high transfection efficacy, comparable to expensive commercial agents. New cost-effective avenues to develop metal-organic-framework-based nonviral vectors for efficient gene delivery and expression are provided.
Sulfur-Functionalized Titanium Carbide Ti3C2TX (MXene) Nanosheets Modified Light Absorbers for Ambient Fabrication of Sb2S3 Solar Cells
Publisher: American Chemical Society (ACS)
Date: 05-07-2022
Harnessing the Potential of Graphitic Carbon Nitride for Optoelectronic Applications
Publisher: Wiley
Date: 18-05-2021
Abstract: As an emergent 2D material, graphitic carbon nitride (g‐CN) has attracted much attention, featuring many photochemical applications and showing several advantages (e.g., low cost, earth‐abundance, and stability) over rare metals. Although most studies focus on the photoelectrochemical and photocatalytic applications of g‐CN, its unique photophysical properties can also be exploited in optoelectronic devices such as light‐emitting diodes, photodetectors, photovoltaics, and solar batteries. This review presents the background of g‐CN, emphasizes the excitonic influence on its optical properties, discusses the recent advances in g‐CN‐based optoelectronics, and examines the challenges of high‐end applications, highlighting the new directions of g‐CN research and the related prospects.
Magnetic Electrodeposition of the Hierarchical Cobalt Oxide Nanostructure from Spent Lithium-Ion Batteries: Its Application as a Supercapacitor Electrode
Publisher: American Chemical Society (ACS)
Date: 21-05-2018
Remarkably enhanced water splitting activity of nickel foam due to simple immersion in a ferric nitrate solution
Publisher: Springer Science and Business Media LLC
Date: 08-2018
Nanocontact-induced catalytic activation in palladium nanoparticles
Publisher: Royal Society of Chemistry (RSC)
Date: 2009
DOI: 10.1039/B9NR00093C
Abstract: We report the synthesis and catalytic studies of novel palladium nanostructures assembled from small nanoparticles by a surfactant-templated method. These one-dimensional nanomaterials comprise high-density nanocontacts of approximately 1 nm in contact length at the particle-particle interface. In contrast to dispersed Pd nanoparticles ( approximately 5 nm), the polycrystalline palladium nanowires exhibit enhanced ( approximately 200 times) catalytic reactivity towards carbon-carbon cross-couplings under mild conditions. Theoretical modeling studies suggest that the presence of nanocontacts triggers electron transfer and localized charge redistribution in the contact region. The charge redistribution causes the nanocontacts to become highly attractive to charged organic molecules, resulting in the facilitation of organic transformations.
Photocatalytic Hydrogen Production
Publisher: Wiley
Date: 14-01-2022
Synthesis and Transfer of Large-Area Monolayer WS2 Crystals: Moving Toward the Recyclable Use of Sapphire Substrates
Publisher: American Chemical Society (ACS)
Date: 15-05-2015
Abstract: Two-dimensional layered transition metal dichalcogenides (TMDs) show intriguing potential for optoelectronic devices due to their exotic electronic and optical properties. Only a few efforts have been dedicated to large-area growth of TMDs. Practical applications will require improving the efficiency and reducing the cost of production, through (1) new growth methods to produce large size TMD monolayer with less-stringent conditions, and (2) nondestructive transfer techniques that enable multiple reuse of growth substrate. In this work, we report to employ atmospheric pressure chemical vapor deposition (APCVD) for the synthesis of large size (>100 μm) single crystals of atomically thin tungsten disulfide (WS2), a member of TMD family, on sapphire substrate. More importantly, we demonstrate a polystyrene (PS) mediated delamination process via capillary force in water which reduces the etching time in base solution and imposes only minor damage to the sapphire substrate. The transferred WS2 flakes are of excellent continuity and exhibit comparable electron mobility after several growth cycles on the reused sapphire substrate. Interestingly, the photoluminescence emission from WS2 grown on the recycled sapphire is much higher than that on fresh sapphire, possibly due to p-type doping of monolayer WS2 flakes by a thin layer of water intercalated at the atomic steps of the recycled sapphire substrate. The growth and transfer techniques described here are expected to be applicable to other atomically thin TMD materials.
Recent Progress of Direct Ink Writing of Electronic Components for Advanced Wearable Devices
Publisher: American Chemical Society (ACS)
Date: 15-08-2019
Cytomembrane-Inspired MXene Ink with Amphiphilic Surfactant for 3D Printed Microsupercapacitors
Publisher: American Chemical Society (ACS)
Date: 24-08-2022
Abstract: Two-dimensional (2D) material-based hydrogels have been widely utilized as the ink for extrusion-based 3D printing in various electronics. However, the viscosity of the hydrogel ink is not high enough to maintain the self-supported structure without architectural deformation. It is also difficult to tune the microstructure of the printed devices using a low-viscosity hydrogel ink. Herein, by mimicking a phospholipid bilayer in a cytomembrane, the hiphilic surfactant nonaethylene glycol monododecyl ether (C12E9) was incorporated into MXene hydrogel. The incorporation of C12E9 offers hiphilicity to the MXene flakes and produces a 3D interlinked network of the MXene flakes. The 3D interlinked network offers a high-viscosity, homogenized flake distribution and enhanced printability to the ink. This ink facilitates the alignment of the MXene flakes during extrusion as well as the formation of the aligned micro- and sub-microsized porous structures, leading to the improved electrochemical performance of the printed microsupercapacitor. This study provides an ex le for the preparation of microelectronics with tunable microstructures.
Nanomaterials and Composites for Energy Conversion and Storage
Publisher: Springer Science and Business Media LLC
Date: 12-07-2021
Emerging Ru-Co homogeneous-heterogeneous photocatalytic CO2 reduction systems
Publisher: Elsevier BV
Date: 05-2023
Mechanically-Assisted Electrochemical Production of Graphene Oxide
Publisher: American Chemical Society (ACS)
Date: 11-11-2016
Bifunctional FePt Core−Shell and Hollow Spheres: Sonochemical Preparation and Self-Assembly
Publisher: American Chemical Society (ACS)
Date: 17-04-2007
DOI: 10.1021/CM0703728
Self-assembly fabrication of lignin-derived carbon with dual heteroatoms doping for high-performance supercapacitor
Publisher: Springer Science and Business Media LLC
Date: 12-05-2023
DOI: 10.1186/S42825-023-00122-W
Abstract: Renewable and low-cost biomass is an ideal sustainable alternative to petroleum-based resources, but producing biomass-based carbon electrode with high performances remains a challenge. Herein, we propose a facile self-assembly strategy to fabricate a biomass-derived N, S co-doping carbon electrode from lignosulfonate without any activation or template process. Taking advantage of the coordination between Fe ions and lignosulfonate, the resultant carbon exhibits a spherical structure with abundant graphitized nanosheets, leading to a high specific surface area with rational pore structure, which are beneficial to the electron/ion transport and storage. The high contents of doping N (8.47 wt%) and S (2.56 wt%) significantly boost the electrochemical performances. As a supercapacitor electrode, the carbon material displays high specific capacitance of 390 F g −1 , excellent cycling stability and high energy density of 14.7 W h kg −1 at a power density of 450 W kg −1 . This study provides a potential strategy for synthesizing cost-effective heteroatom-doped carbon materials from biomass with abundant functional groups and heteroatom sources, such as chitosan, collagen, and gelatin. Graphical Abstract
Cell Adhesion Properties on Photochemically Functionalized Diamond
Publisher: American Chemical Society (ACS)
Date: 04-04-2007
DOI: 10.1021/LA070037Y
Abstract: The biocompatibility of diamond was investigated with a view toward correlating surface chemistry and topography with cellular adhesion and growth. The adhesion properties of normal human dermal fibroblast (NHDF) cells on microcrystalline and ultrananocrystalline diamond (UNCD) surfaces were measured using atomic force microscopy. Cell adhesion forces increased by several times on the hydrogenated diamond surfaces after UV irradiation of the surfaces in air or after functionalization with undecylenic acid. A direct correlation between initial cell adhesion forces and the subsequent cell growth was observed. Cell adhesion forces were observed to be strongest on UV-treated UNCD, and cell growth experiments showed that UNCD was intrinsically more biocompatible than microcrystalline diamond surfaces. The surface carboxylic acid groups on the functionalized diamond surface provide tethering sites for laminin to support the growth of neuron cells. Finally, using capillary injection, a surface gradient of polyethylene glycol could be assembled on top of the diamond surface for the construction of a cell gradient.
Facile electrochemical approach for the production of graphite oxide with tunable chemistry
Publisher: Elsevier BV
Date: 02-2017
Scalable Spray Drying Production of Amorphous V2O5–EGO 2D Heterostructured Xerogels for High-Rate and High-Capacity Aqueous Zinc Ion Batteries
Publisher: Wiley
Date: 13-01-2022
Abstract: Rechargeable aqueous zinc‐ion batteries (ZIBs) are promising in stationary grid energy storage due to their advantages in safety and cost‐effectiveness, and the search for competent cathode materials is one core task in the development of ZIBs. Herein, the authors design a 2D heterostructure combining amorphous vanadium pentoxide and electrochemically produced graphene oxide (EGO) using a fast and scalable spray drying technique. The unique 2D heterostructured xerogel is achieved by controlling the concentration of EGO in the precursor solution. Driven by the improved electrochemical kinetics, the resultant xerogel can deliver an excellent rate capability (334 mAh g −1 at 5 A g −1 ) as well as a high specific capacity (462 mAh g −1 at 0.2 A g −1 ) as the cathode material in ZIB. It is also shown that the coin cell constructed based on spray‐dried xerogel can output steady, high energy densities over a broad power density window. This work provides a scalable and cost‐effective approach for making high performance electrode materials from cheap sources through existing industrialized materials processing.
Highly Dispersed Ru Nanoparticles on Boron-Doped Ti3C2Tx (MXene) Nanosheets for Synergistic Enhancement of Electrocatalytic Hydrogen Evolution
Publisher: Wiley
Date: 19-08-2021
Abstract: 2D‐layered materials have attracted increasing attention as low‐cost supports for developing active catalysts for the hydrogen evolution reaction (HER). In addition, atomically thin Ti 3 C 2 T x (MXene) nanosheets have surface termination groups (T x : F, O, and OH), which are active sites for effective functionalization. In this work, heteroatom (boron)‐doped Ti 3 C 2 T x (MXene) nanosheets are developed as an efficient solid support to host ultrasmall ruthenium (Ru) nanoparticles for electrocatalytic HER. The quantum‐mechanical first‐principles calculations and electrochemical tests reveal that the B‐doping onto 2D MXene nanosheets can largely improve the intermediate H* adsorption kinetics and reduce the charge‐transfer resistance toward the HER, leading to increased reactivity of active sites and favorable electrode kinetics. Importantly, the newly designed electrocatalyst based on Ru nanoparticles supported on B‐doped MXene (Ru@B–Ti 3 C 2 T x ) nanosheets shows a remarkable catalytic activity with low overpotentials of 62.9 and 276.9 mV to drive 10 and 100 mA cm −2 , respectively, for the HER, while exhibiting excellent cycling stabilities. Moreover, according to the theoretical calculations, Ru@B–Ti 3 C 2 T x exhibits a near‐zero value of Gibbs free energy (Δ G H* = 0.002 eV) for the HER. This work introduces a facile strategy to functionalize MXene for use as a solid support for efficient electrocatalysts.
Efficient Synergism of Chemisorption and Wackenroder Reaction via Heterostructured La2O3-Ti3C2Tx -Embedded Carbon Nanofiber for High-Energy Lithium-Sulfur Pouch Cells
Publisher: Wiley
Date: 14-05-2023
Abstract: Lithium‐sulfur (Li‐S) batteries have been regarded as promising next‐generation energy storage systems due to their high energy density and low cost, but their practical application is hindered by inferior long‐cycle stability caused by the severe shuttle effect of lithium polysulfides (LiPSs) and sluggish reaction kinetics. This study reports a La 2 O 3 ‐MXene heterostructure embedded in carbon nanofiber (CNF) (denoted as La 2 O 3 ‐MXene@CNF) as a sulfur (S) host to address the above issues. The unique features of this heterostructure endow the sulfur host with synergistic catalysis during the charging and discharging processes. The strong adsorption ability provided by the La 2 O 3 domain can capture sufficient LiPSs for the subsequent catalytic conversion, and the insoluble thiosulfate intermediate produced by hydroxyl terminal groups on the surface of MXene greatly promotes the rapid conversion of LiPSs to Li 2 S via a “Wackenroder reaction.” Therefore, the S cathode with La 2 O 3 ‐MXene@CNF (La 2 O 3 ‐MXene@CNF/S) exhibits excellent cycling stability with a low capacity fading rate of 0.031% over 1000 cycles and a high capacity of 857.9 mAh g −1 under extremely high sulfur loadings. Furthermore, a 5 Ah‐level pouch cell is successfully assembled for stable cycling, which delivers a high specific energy of 341.6 Wh kg −1 with a low electrolyte/sulfur ratio (E/S ratio).
Hydrothermal Dehydration for the “Green” Reduction of Exfoliated Graphene Oxide to Graphene and Demonstration of Tunable Optical Limiting Properties
Publisher: American Chemical Society (ACS)
Date: 26-05-2009
DOI: 10.1021/CM9006603
Exfoliated 2D Antimonene-Based Structures for Light-Harvesting Photoactive Layer of Highly Stable Solar Cells
Publisher: Wiley
Date: 05-04-2022
Abstract: 2D materials have shown great promise in various applications including solar cells, but their use as light‐harvesting active layers in photovoltaic (PV) devices is limited. Herein, surface‐oxidized antimonene sheets are prepared using a liquid‐phase exfoliation method and employed as an active light absorber material after functionalization. It is shown that 2D antimonene possesses unique surface chemistry that allows it to form photoactive Sb 2 S 3 light absorbers for solar cells under ambient conditions. Under the standard PV testing conditions (AM1.5G), devices fabricated with 2D antimonene‐based light‐harvesting materials deliver a power conversion efficiency (PCE) of up to 4.28%. This novel type of solar cell exhibits outstanding operational stabilities, preserving % of the initial PCE after aging for 60 min at a temperature of 85 °C, retaining % of the initial efficiency after exposure to continuous light illumination under 1 sun for 180 min, and maintaining its functionality after being underwater for 25 min. This work opens new avenues for research in 2D materials and photovoltaics.
Potassium spin polarization lifetime for a 30-carbon chain siloxane film
Publisher: AIP Publishing
Date: 02-11-2012
DOI: 10.1063/1.4761934
Abstract: The siloxane film derived from the 30-carbon chain triacontyltrichlorosilane (TCTS) is studied as an anti-relaxation coating for atomic vapor cells. The longitudinal spin relaxation lifetime of optically pumped potassium atoms in the presence of TCTS is measured and the average number of non-relaxing atom-wall collisions, or bounces, enabled by the coated surface is determined. X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM) of TCTS were performed to investigate changes in chemical states and surface morphology of TCTS arising from K atom deposition on the film surface. TCTS was found to give approximately 530 bounces. Following lifetime measurements, K2p signals were clearly observed in XPS spectra. AFM images display non-preferential K deposition on the TCTS surface, however additional AFM studies with a TCTS surface exposed to Rb atoms show deposition occurs along surface defects. In agreement, Rb is found to preferentially deposit along the step edges of an 18-carbon chain monolayer film derived from 1-Octadecene. Finally, AFM indicates a much smoother surface for a tetracontane coating relative to TCTS. The importance of siloxane surface morphology versus film thickness with respect to coating performance is discussed.
Solvothermal Growth of Bismuth Chalcogenide Nanoplatelets by the Oriented Attachment Mechanism: An in Situ PXRD Study
Publisher: American Chemical Society (ACS)
Date: 28-04-2015
Ultrathin Nitrogen-Doped Holey Carbon@Graphene Bifunctional Electrocatalyst for Oxygen Reduction and Evolution Reactions in Alkaline and Acidic Media
Publisher: Wiley
Date: 14-11-2018
Abstract: Efficient nonprecious-metal oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) electrocatalysts are key for the commercial viability of fuel cells, metal-air batteries, and water-splitting systems. Thus, high-performance ORR and OER electrocatalysts in acidic electrolytes are needed to support high-efficiency proton exchange membrane (PEM)-based systems. Herein, we report a new approach to design and prepare an ultrathin N-doped holey carbon layer (HCL) on a graphene sheet that exhibits outstanding bifunctional ORR/OER activities in both alkaline and acidic media. The edge sites of HCL are utilized to achieve selective doping of highly active pyridinic-N. The sandwiched graphene sheet provides mechanical support, stabilizes HCL structure and promotes charge transfer. The synergetic effect of the catalyst structure overcomes the drawbacks of holey graphene approaches. The resulting ORR and OER performances are equal to or better than the top-ranked electrocatalysts.
3rd International Symposium on Renewable Energy Technologies
Publisher: Wiley
Date: 08-2019
Room temperature production of graphene oxide with thermally labile oxygen functional groups for improved lithium ion battery fabrication and performance
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9TA02244A
Abstract: We report a room-temperature synthesis method to produce graphene oxide with thermally-labile oxygen functional groups.
Fast and cost-effective room temperature synthesis of high quality graphene oxide with excellent structural intactness
Publisher: Elsevier BV
Date: 09-2020
Scalable Construction of Multifunctional Protection Layer with Low‐Cost Water Glass for Robust and High‐Performance Zinc Anode
Publisher: Wiley
Date: 11-10-2023
Ni-Co-O hole transport materials: gap state assisted hole extraction with superior electrical conductivity
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9TA07331K
Abstract: An inorganic NiCoO x hole conductor was developed as an HTM for PSCs. The ch ion device yielded a PCE of 20.03%.
Exfoliated 2D Antimonene‐Based Structures for Light‐Harvesting Photoactive Layer of Highly Stable Solar Cells
Publisher: Wiley
Date: 06-2022
Ruthenium single-atom modulated Ti3C2Tx MXene for efficient alkaline electrocatalytic hydrogen production
Publisher: Wiley
Date: 31-08-2023
DOI: 10.1002/EOM2.12274
Abstract: Single‐atoms (SAs) supported on various substrates have emerged as a new form of electrocatalysts for hydrogen evolution reaction (HER). The exfoliated MXenes possess rich defects/vacancies and surface oxygen groups, can be favorably utilized to anchor SAs. Here, we take advantage of the exfoliated Ti 3 C 2 T x to anchor Ru‐SAs on Ti 3 C 2 T x through a wet‐chemistry impregnation process. The obtained Ru SA @Ti 3 C 2 T x possesses excellent HER activity, especially under high current densities. Remarkably, Ru SA @Ti 3 C 2 T x can readily attain high current densities of 1 and 1.5 A cm −2 at low over potentials of 425.7 and 464.6 mV, respectively, demonstrating its potential for practical applications. The A 1g vibration frequency shift of the Raman spectrum is innovatively used to probe the surface OH coverage on Ti 3 C 2 T x , providing critical information for mechanistic studies. The experimental and theoretical studies reveal that the superior HER electrocatalytic activity of Ru SA @Ti 3 C 2 T x results from the Ru‐SAs enhanced H 2 O adsorption and dissociation, and promoted H 2 formation. image
Scalable production of graphene via wet chemistry: Progress and challenges
Publisher: Elsevier BV
Date: 03-2015
Challenges of Industrial‐Scale Graphene Oxide Production
Publisher: Wiley
Date: 30-09-2016
Enhanced Thermochemical H2 Production on Ca-Doped Lanthanum Manganite Perovskites Through Optimizing the Dopant Level and Re-oxidation Temperature
Publisher: Springer Science and Business Media LLC
Date: 12-02-2018
Low-temperature processed In2S3 electron transport layer for efficient hybrid perovskite solar cells
Publisher: Elsevier BV
Date: 06-2017
Tungsten‐Doped Nanocrystalline V6O13 Nanoparticles as Low‐Cost and High‐Performance Electrodes for Energy Storage Devices
Publisher: Wiley
Date: 17-04-2019
Porous MnO/Mn3O4 nanocomposites for electrochemical energy storage
Publisher: Elsevier BV
Date: 04-2015
Ru(bpy)32+-sensitized {001} facets LiCoO2 nanosheets catalyzed CO2 reduction reaction with 100% carbonaceous products
Publisher: Springer Science and Business Media LLC
Date: 10-07-2021
Enhanced Electrochemical Expansion of Graphite for in Situ Electrochemical Functionalization
Publisher: American Chemical Society (ACS)
Date: 17-10-2012
DOI: 10.1021/JA309023F
Abstract: An all electrochemical route to functionalized graphene directly from a graphite electrode is described herein obviating the need for defect inducing oxidative or prolonged sonication treatments. Enhanced electrochemical expansion of graphite is achieved by sequential treatment, beginning with the established method of expansion by electrolysis in a Li(+) containing electrolyte, and then with the much larger tetra-n-butylammonium. The result is a hyperexpansion of the graphite basal planes. As a demonstration of the utility of this method, we successfully performed a subsequent in situ electrochemical diazonium functionalization of the hyperexpanded graphite basal planes to give functional graphene sheets. This potential controlled process is more effective than chemical processes and also provides a means of controlling the degree of functionalization. We have further demonstrated that the functionalized graphene could be converted to a pristine low defect form via laser ablation of the funtional groups. As a result, this method presents a potentially scalable approach for graphene circuit patterning.
Foreword: Clean Technologies Powered by Advanced Materials, Special Issue for the 1st International Conference on Sustainable Technologies for a Blue Planet
Publisher: Elsevier BV
Date: 04-2021
Large-Scale Production of Bismuth Chalcogenide and Graphene Heterostructure and Its Application for Flexible Broadband Photodetector
Publisher: Wiley
Date: 16-03-2016
Electrochemical exfoliation of graphite and production of functional graphene
Publisher: Elsevier BV
Date: 10-2015
Heat and Electro-Responsive Nanomaterials for Smart Windows
Publisher: Springer International Publishing
Date: 2020
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