ORCID Profile
0000-0002-8840-862X
Current Organisation
University of Adelaide
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Nanomaterials | Materials engineering | Nanotechnology | Composite and Hybrid Materials | Nanomaterials | Functional materials | Composite and hybrid materials
Renewable Energy not elsewhere classified | Expanding Knowledge in the Chemical Sciences | Expanding Knowledge in Engineering |
Publisher: Wiley
Date: 04-02-2019
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C0EE00729C
Publisher: Springer Science and Business Media LLC
Date: 06-08-2022
DOI: 10.1038/S41467-022-32256-6
Abstract: High-performance and low-cost photocatalysts play the key role in achieving the large-scale solar hydrogen production. In this work, we report a liquid-exfoliation approach to prepare NiPS 3 ultrathin nanosheets as a versatile platform to greatly improve the light-induced hydrogen production on various photocatalysts, including TiO 2 , CdS, In 2 ZnS 4 and C 3 N 4 . The superb visible-light-induced hydrogen production rate (13,600 μmol h −1 g −1 ) is achieved on NiPS 3 /CdS hetero-junction with the highest improvement factor (~1,667%) compared with that of pure CdS. This significantly better performance is attributed to the strongly correlated NiPS 3 /CdS interface assuring efficient electron-hole dissociation/transport, as well as abundant atomic-level edge P/S sites and activated basal S sites on NiPS 3 ultrathin nanosheets advancing hydrogen evolution. These findings are revealed by the state-of-art characterizations and theoretical computations. Our work for the first time demonstrates the great potential of metal phosphorous chalcogenide as a general platform to tremendously raise the performance of different photocatalysts.
Publisher: Royal Society of Chemistry (RSC)
Date: 2010
DOI: 10.1039/B914385H
Publisher: Springer Science and Business Media LLC
Date: 03-01-2017
DOI: 10.1038/NCOMMS13907
Abstract: Scalable and sustainable solar hydrogen production through photocatalytic water splitting requires highly active and stable earth-abundant co-catalysts to replace expensive and rare platinum. Here we employ density functional theory calculations to direct atomic-level exploration, design and fabrication of a MXene material, Ti 3 C 2 nanoparticles, as a highly efficient co-catalyst. Ti 3 C 2 nanoparticles are rationally integrated with cadmium sulfide via a hydrothermal strategy to induce a super high visible-light photocatalytic hydrogen production activity of 14,342 μmol h −1 g −1 and an apparent quantum efficiency of 40.1% at 420 nm. This high performance arises from the favourable Fermi level position, electrical conductivity and hydrogen evolution capacity of Ti 3 C 2 nanoparticles. Furthermore, Ti 3 C 2 nanoparticles also serve as an efficient co-catalyst on ZnS or Zn x Cd 1− x S. This work demonstrates the potential of earth-abundant MXene family materials to construct numerous high performance and low-cost photocatalysts hotoelectrodes.
Publisher: Hindawi Limited
Date: 2012
DOI: 10.1155/2012/472958
Abstract: Ordered titanate nanoribbon (TNR)/SnO 2 films were fabricated by electrophoretic deposition (EPD) process using hydrothermally prepared titanate nanoribbon as a precursor. The formation mechanism of ordered TNR film on the fluorine-doped SnO 2 coated (FTO) glass was investigated by scanning electron microscopy (SEM). The effects of calcination temperatures on the phase structure and photocatalytic activity of ordered TNR/SnO 2 films were investigated and discussed. The X-ray diffraction (XRD) results indicate that the phase transformation of titanate to anatase occurs at 400°C and with increasing calcination temperature, the crystallization of anatase increases. At 600°C, the nanoribbon morphology still hold and the TiO 2 /SnO 2 film exhibits the highest photocatalytic activity due to the good crystallization, unique morphology, and efficient photogenerated charge carriers separation and transfer at the interface of TiO 2 and SnO 2 .
Publisher: Elsevier BV
Date: 11-2011
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5NR05299H
Abstract: The design and synthesis of metal oxide nanomaterials is one of the key steps for achieving highly efficient energy conversion and storage on an industrial scale.
Publisher: Wiley
Date: 17-12-2014
Abstract: Flexible non-metal oxygen electrodes fabricated from phosphorus-doped graphitic carbon nitride nano-flowers directly grown on carbon-fiber paper exhibit high activity and stability in reversibly catalyzing oxygen reduction and evolution reactions, which is a result of N, P dual action, enhanced mass/charge transfer, and high active surface area. The performance is comparable to that of the state-of-the-art transition-metal, noble-metal, and non-metal catalysts. Remarkably, the flexible nature of these oxygen electrodes allows their use in folded and rolled-up forms, and directly as cathodes in Zn-air batteries, featuring low charge/discharge overpotential and long lifetime.
Publisher: Wiley
Date: 13-03-2014
Publisher: Wiley
Date: 27-01-2015
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8TA09358J
Abstract: MoN nanosheets for the first time serve as a highly active co-catalyst to greatly enhance the photocatalytic H 2 production of TiO 2 .
Publisher: Wiley
Date: 07-2019
Abstract: As photocatalysis technology could transform renewable and clean solar energy into green hydrogen (H
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5EE02650D
Abstract: Porous P-doped g-C 3 N 4 nanosheets prepared by combining P doping and thermal exfoliation exhibit a high visible-light photocatalytic H 2 -production activity of 1596 μmol h −1 g −1 and a quantum efficiency of 3.56% at 420 nm.
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3EE42383B
Publisher: Wiley
Date: 19-07-2017
Abstract: Transitional metals are widely used as co-catalysts boosting photocatalytic H
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4NR05451B
Abstract: Heterostructured BiOBr/Bi24O31Br10 nanocomposites with surface oxygen vacancies are constructed by a facile in situ route of one-step self-combustion of ionic liquids. The compositions can be easily controlled by simply adjusting the fuel ratio of urea and 2-bromoethylamine hydrobromide (BTH). BTH serves not only as a fuel, but also as a complexing agent for ionic liquids and a reactant to supply the Br element. The heterojunctions show remarkable adsorptive ability for both the cationic dye of rhodamine B (RhB) and the anionic dye of methylene orange (MO) at high concentrations, which is attributed to the abundant surface oxygen vacancies. The s le containing 75.2% BiOBr and 24.8% Bi24O31Br10 exhibits the highest photocatalytic activity. Its reaction rate constant is 4.0 and 9.0 times that of pure BiOBr in degrading 50 mg L(-1) of RhB and 30 mg L(-1) of MO under visible-light (λ > 400 nm) irradiation, respectively, which is attributed to the narrow band gap and highly efficient transfer efficiency of charge carriers. Different photocatalytic reaction processes and mechanisms over pure BiOBr and heterojunctions are proposed.
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5TA10194H
Abstract: We introduce a three-step method (co-polymerization, surface activation and exfoliation) for the first time to synthesize sub-nanometer-thin carbon nitride nanosheets as highly efficient hydrogen evolution photocatalysts.
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9CS00172G
Abstract: The long-standing popularity of semiconductor photocatalysts stimulated their characterization, which is the subject of this review aiming to help materials chemists and physicists, particularly students, to select suitable characterization methods.
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9NR00663J
Abstract: The photocatalytic performance of hydrogen production is significantly accelerated by a two-dimensional Co-based metal–organic framework.
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1GC15465F
Publisher: Wiley
Date: 24-03-2017
Abstract: Engineering high-energy interfacial structures for high-performance electrocatalysis is achieved by chemical coupling of active CoO nanoclusters and high-index facet Mn
Publisher: American Chemical Society (ACS)
Date: 17-11-2017
Abstract: Developing efficient electrocatalysts consisting of earth-abundant elements for oxygen evolution reaction (OER) is crucial for energy devices and technologies. Herein, we report self-supported highly porous nitrogen-doped graphene foam synthesized through the electrochemical expansion of carbon-fiber paper and subsequent nitrogen plasma treatment. A thorough characterization, such as electron microscopy and synchrotron-based near-edge X-ray absorption fine structure, indicates the well-developed porous structures featuring homogeneously doped nitrogen heteroatoms. These merits ensure enriched active sites, an enlarged active surface area, and improved mass/electron transport within the continuous graphene framework, thus leading to an outstanding capability toward electrocatalyzing OER in alkaline media, even competitive with the state-of-the-art noble-/transition-metal and nonmetal electrocatalysts reported to date, from the perspectives of the sharp onset potential, a small Tafel slope, and remarkable durability. Furthermore, a rechargeable Zn-air battery with this self-supported electrocatalyst directly used as the air cathode renders a low charge/discharge overpotential and considerable life span. The finding herein suggests that a rational methodology to synthesize graphene-based materials can significantly enhance the oxygen electrocatalysis, thereby promoting the overall performance of the energy-related system.
Publisher: Hindawi Limited
Date: 2012
DOI: 10.1155/2012/797968
Abstract: Monoclinic-phase BiVO 4 hollow microspheres with diameters of about 2–4 μm have been successfully fabricated in high yield by a one-pot template-free hydrothermal route. The reaction duration and urea concentration are shown to play important roles in the formation of the BiVO 4 hollow microspheres. X-ray diffraction, scanning electron microscopy, nitrogen adsorption-desorption isotherms, fourier transform infrared spectrometry, and UV-visible diffuse reflectance spectroscopy are used to characterize the products. The results show that all the as-prepared BiVO 4 s les have monoclinic phase structure and exhibit good crystallinity. A formation mechanism for the BiVO 4 hollow spherical structure via a localized Ostwald ripening is proposed based on the experimental observations. In addition, studies of the photocatalytic properties by exposure to visible light irradiation demonstrate that the as-obtained BiVO 4 hollow spheres show potential photocatalytic application. Hydroxyl radicals ( • OH) are not detected on the surface of visible-light-illuminated BiVO 4 by the photoluminescence technique, suggesting that • OH is not the dominant photooxidant and photogenerated hole could directly take part in photocatalytic reaction. The prepared BiVO 4 hollow spheres are also of great interest in pigment, catalysis, separation technology, biomedical engineering, and nanotechnology.
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7EE02220D
Abstract: This perspective highlights the rational design of efficient electrocatalysts and photo(electro)catalysts for N 2 reduction to ammonia (NH 3 ) under ambient conditions.
Publisher: American Chemical Society (ACS)
Date: 24-06-2011
DOI: 10.1021/JA2025454
Abstract: The production of clean and renewable hydrogen through water splitting using photocatalysts has received much attention due to the increasing global energy crises. In this study, a high efficiency of the photocatalytic H(2) production was achieved using graphene nanosheets decorated with CdS clusters as visible-light-driven photocatalysts. The materials were prepared by a solvothermal method in which graphene oxide (GO) served as the support and cadmium acetate (Cd(Ac)(2)) as the CdS precursor. These nanosized composites reach a high H(2)-production rate of 1.12 mmol h(-1) (about 4.87 times higher than that of pure CdS nanoparticles) at graphene content of 1.0 wt % and Pt 0.5 wt % under visible-light irradiation and an apparent quantum efficiency (QE) of 22.5% at wavelength of 420 nm. This high photocatalytic H(2)-production activity is attributed predominantly to the presence of graphene, which serves as an electron collector and transporter to efficiently lengthen the lifetime of the photogenerated charge carriers from CdS nanoparticles. This work highlights the potential application of graphene-based materials in the field of energy conversion.
Publisher: Elsevier BV
Date: 12-2017
Publisher: Wiley
Date: 28-08-2018
Abstract: The realization of large-scale solar hydrogen (H
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D0TA11201A
Abstract: This perspective summarizes the design and synthesis of two-dimensional building block based photocatalysts for light-induced NH 3 production. The structure–performance relationship and mechanism of photocatalysts are highlighted.
Publisher: Wiley
Date: 30-04-2018
Abstract: The generation of green hydrogen (H
Publisher: Wiley
Date: 09-2015
Abstract: The development of highly efficient and robust photocatalysts has attracted great attention for solving the global energy crisis and environmental problems. Herein, we describe the synthesis of a p–n heterostructured photocatalyst, consisting of ZnO nanorod arrays (NRAs) decorated with BiOI nanoplates (NPs), by a facile solvothermal method. The product thus obtained shows high photoelectrochemical water splitting performance and enhanced photoelectrocatalytic activity for pollutant degradation under visible light irradiation. The p‐type BiOI NPs, with a narrow band gap, not only act as a sensitizer to absorb visible light and promote electron transfer to the n‐type ZnO NRAs, but also increase the contact area with organic pollutants. Meanwhile, ZnO NRAs provide a fast electron‐transfer channel, thus resulting in efficient separation of photoinduced electron–hole pairs. Such a p–n heterojunction nanocomposite could serve as a novel and promising catalyst in energy and environmental applications.
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3CS60425J
Abstract: Active and robust cocatalysts constructed from earth-abundant elements greatly contribute to the highly efficient, stable and cost-effective photocatalytic water splitting.
Publisher: Wiley
Date: 24-03-2023
Abstract: Solar hydrogen (H 2 ) generation via photocatalytic water splitting is practically promising, environmentally benign, and sustainably carbon neutral. It is important therefore to understand how to controllably engineer photocatalysts at the atomic level. In this work, atomic‐level engineering of defected ReSe 2 nanosheets (NSs) is reported to significantly boost photocatalytic H 2 evolution on various semiconductor photocatalysts including TiO 2 , CdS, ZnIn 2 S 4 , and C 3 N 4 . Advanced characterizations, such as atomic‐resolution aberration‐corrected scanning transmission electron microscopy (AC‐STEM), synchrotron‐based X‐ray absorption near edge structure (XANES), in situ X‐ray photoelectron spectroscopy (XPS), transient‐state surface photovoltage (SPV) spectroscopy, and transient‐state photoluminescence (PL) spectroscopy, together with theoretical computations confirm that the strongly coupled ReSe 2 /TiO 2 interface and substantial atomic‐level active sites of defected ReSe 2 NSs result in the significantly raised activity of ReSe 2 /TiO 2 . This work not only for the first time realizes the atomic‐level engineering of ReSe 2 NSs as a versatile platform to significantly raise the activities on different photocatalysts, but, more importantly, underscores the immense importance of atomic‐level synthesis and exploration on 2D materials for energy conversion and storage.
Publisher: Wiley
Date: 08-01-2018
Abstract: Ever-increasing fossil-fuel combustion along with massive CO
Publisher: Wiley
Date: 07-10-2014
Abstract: The application of various earth-abundant Ni species, such as NiS, Ni, Ni(OH)2 , and NiO, as a co-catalyst in a Znx Cd1-x S system for visible-light photocatalytic H2 production was investigated for the first time. The loading of Ni or NiS enhanced the photocatalytic activity of Znx Cd1-x S because they could promote the electron transfer at the interface with Znx Cd1-x S and catalyze the H2 evolution. Surprisingly, Ni(OH)2 -loaded Znx Cd1-x S exhibits a very high photocatalytic H2 -production rate of 7160 μmol h(-1) g(-1) with a quantum efficiency of 29.5 % at 420 nm, which represents one of the most efficient metal sulfide photocatalysts without a Pt co-catalyst to date. This outstanding activity arises from the pronounced synergetic effect between Ni(OH)2 and metallic Ni formed in situ during the photocatalytic reaction. However, the loading of NiO deactivated the activity of Znx Cd1-x S because of their unmatched conduction band positions. This paper reports the optimization of the Znx Cd1-x S system by selecting an appropriate Ni-based co-catalyst, Ni(OH)2 , from a series of Ni species to achieve the highest photocatalytic H2 -production activity for the first time and also reveals the roles of these Ni species in the photocatalytic activity.
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7CC05466A
Abstract: The coupling of few-layer phosphorene nano-sheets with Zn x Cd 1−x S nano-particles greatly improved the visible-light photocatalytic H 2 -production activity.
Start Date: 2020
End Date: 06-2023
Amount: $409,516.00
Funder: Australian Research Council
View Funded ActivityStart Date: 07-2023
End Date: 06-2027
Amount: $848,325.00
Funder: Australian Research Council
View Funded Activity