ORCID Profile
0000-0003-1559-0456
Current Organisations
Queensland University of Technology
,
University of Sydney
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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)
Catalysis and Mechanisms of Reactions | Physical Chemistry (Incl. Structural) | Optical properties of materials | Catalysis and mechanisms of reactions | Physical Chemistry of Materials | Catalytic Process Engineering | Optical Properties of Materials | Manufacturing Processes and Technologies (excl. Textiles) | Chemical Engineering | Physical chemistry |
ANZSRC Socio-Economic Objective (SEO)
Expanding Knowledge in the Chemical Sciences | Expanding Knowledge in the Physical Sciences | Expanding Knowledge in Engineering | Organic Industrial Chemicals (excl. Resins, Rubber and Plastics) |
Related Links
Publications
Catalysis based on ferroelectrics: controllable chemical reaction with boosted efficiency
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1NR00847A
Abstract: Ferroelectric catalysts possess the advantages of boosted catalytic efficiency as a result of polarization, which suppresses electron–hole pair recombination, and superior selectivity via the ferroelectric switch.
Factors influencing the photocatalytic hydroamination of alkynes with anilines catalyzed by supported gold nanoparticles under visible light irradiation
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6RA01518B
Abstract: The hydroamination of alkynes with amines is successfully driven by visible-light when using AuNPs on metal oxide supports as plasmonic photocatalysts.
Capture of radioactive cesium and iodide ions from water by using titanate nanofibers and nanotubes
Publisher: Wiley
Date: 20-09-2011
Solar thermal-activated photocatalysis for hydrogen production and aqueous triethanolamine polymerization
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2TA02066A
Abstract: Solar thermal-activated photocatalysis (STAP) has been developed as an efficient sustainable technology for hydrogen generation and aqueous triethanolamine polymerization initiated by heterogeneous photocatalysts under solar light irradiation.
Removal of radioactive iodine from water using Ag2 O grafted titanate nanolamina as efficient adsorbent
Publisher: Elsevier BV
Date: 02-2013
DOI: 10.1016/J.JHAZMAT.2012.12.008
Abstract: Emergency treatment of radioactive material leakage and safety disposal of nuclear waste is a constant concern all along with the development of radioactive materials applications. To provide a solution, titanate with large surface area (143 m(2)g(-1)) and a lamina morphology (the thickness of the lamina is in range of tens of nanometers) was prepared from inorganic titanium compounds by hydrothermal reactions at 433 K. Ag(2)O nanocrystals (5-30 nm) were deposited onto the titanate lamina. The surface of the titanate lamina has crystallographic similarity to that of Ag(2)O nanocrystals. Hence, the deposited Ag(2)O nanocrystals and titanate substrate join together at these surfaces, forming a well-matched phase coherent interface between them. Such coherence between the two phases reduces the overall energy by minimizing surface energy and anchors the Ag(2)O nanocrystals firmly on the external surface of the titanate structure. The composite thus obtained was applied as efficient adsorbent to remove radioactive iodine from water (one gram adsorbent can capture up to 3.4 mmol of I(-) anions). The composite adsorbent can be recovered easily for safe disposal. The structure changes of the titanate lamina and the composite adsorbent were monitored by various techniques. The isotherm and kinetics of iodine adsorption, competitive adsorption and column adsorption using the adsorbent were studied to assess its iodine removal abilities. The adsorbent exhibited a capacity as high as 3.4 mmol of iodine per gram of adsorbent in 1h. Therefore, Ag(2)O deposited titanate lamina is an effective adsorbent for removing radioactive iodine from water.
Photocatalysis on supported gold and silver nanoparticles under ultraviolet and visible light irradiation
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3GC40450A
Plasmonic silver nanoparticles promoted sugar conversion to 5-hydroxymethylfurfural over catalysts of immobilised metal ions
Publisher: Elsevier BV
Date: 11-2021
Stable Copper Nanoparticle Photocatalysts for Selective Epoxidation of Alkenes with Visible Light
Publisher: American Chemical Society (ACS)
Date: 30-06-2017
High efficient arsenic removal by In-layer sulphur of layered double hydroxide
Publisher: Elsevier BV
Date: 02-2022
DOI: 10.1016/J.JCIS.2021.10.148
Abstract: High-risk arsenic contamination found in aqueous system is reported across the world and causing severe environmental issues. In this study, the Mg-Al Layered Double Hydroxide (LDH) modified by sulphur species (LDH-S) was found exhibiting high effectivity and selectivity in As(V) removal owing to the strong interaction between embedded HS
Plasmonic Switching of the Reaction Pathway: Visible‐Light Irradiation Varies the Reactant Concentration at the Solid–Solution Interface of a Gold–Cobalt Catalyst
Publisher: Wiley
Date: 18-06-2019
Back matter
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2SC90049A
Plasmonic Silver-Nanoparticle-Catalysed Hydrogen Abstraction from the C(sp3)−H Bond of the Benzylic Cα atom for Cleavage of Alkyl Aryl Ether Bonds
Publisher: Wiley
Date: 16-12-2023
Abstract: Selective activation of the C(sp 3 )−H bond is an important process in organic synthesis, where efficiently activating a specific C(sp 3 )−H bond without causing side reactions remains one of chemistry's great challenges. Here we report that illuminated plasmonic silver metal nanoparticles (NPs) can abstract hydrogen from the C(sp 3 )−H bond of the C α atom of an alkyl aryl ether β ‐O‐4 linkage. The intense electromagnetic near‐field generated at the illuminated plasmonic NPs promotes chemisorption of the β ‐O‐4 compound and the transfer of photo‐generated hot electrons from the NPs to the adsorbed molecules leads to hydrogen abstraction and direct cleavage of the unreactive ether C β −O bond under moderate reaction conditions (≈90 °C). The plasmon‐driven process has certain exceptional features: enabling hydrogen abstraction from a specific C(sp 3 )−H bond, along with precise scission of the targeted C−O bond to form aromatic compounds containing unsaturated, substituted groups in excellent yields.
Nanostructure Shape-Effects in ZnO heterogeneous photocatalysis
Publisher: Elsevier BV
Date: 2022
Visible light-driven selective hydrogenation of unsaturated aromatics in an aqueous solution by direct photocatalysis of Au nanoparticles
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7CY02291C
Abstract: Selective hydrogenation of various chemical bonds, such as CC, CC, CO, NO, and CN, is efficiently driven by visible light over a supported gold nanoparticle (AuNP) photocatalyst under mild reaction conditions.
Viable Photocatalysts under Solar-Spectrum Irradiation: Nonplasmonic Metal Nanoparticles
Publisher: Wiley
Date: 07-02-2014
Abstract: Supported nanoparticles (NPs) of nonplasmonic transition metals (Pd, Pt, Rh, and Ir) are widely used as thermally activated catalysts for the synthesis of important organic compounds, but little is known about their photocatalytic capabilities. We discovered that irradiation with light can significantly enhance the intrinsic catalytic performance of these metal NPs at ambient temperatures for several types of reactions. These metal NPs strongly absorb the light mainly through interband electronic transitions. The excited electrons interact with the reactant molecules on the particles to accelerate these reactions. The rate of the catalyzed reaction depends on the concentration and energy of the excited electrons, which can be increased by increasing the light intensity or by reducing the irradiation wavelength. The metal NPs can also effectively couple thermal and light energy sources to more efficiently drive chemical transformations.
Titanate-based adsorbents for radioactive ions entrapment from water
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3NR33622K
Abstract: This feature article reviews some titanate-based adsorbents for the removal of radioactive wastes (cations and anions) from water. At the beginning, we discuss the development of the conventional ion-exchangeable titanate powders for the entrapment of radioactive cations, such as crystalline silicotitanate (CST), monosodium titanate (MST), peroxotitanate (PT). Then, we specially emphasize the recent progress in the uptake of radioactive ions by one-dimensional (1D) sodium titanate nanofibers and nanotubes, which includes the synthesis and phase transformation of the 1D nanomaterials, adsorption ability (capacity, selectivity, kinetics, etc.) of radioactive cations and anions, and the structural evolution during the adsorption process.
Simultaneous removal of cationic and anionic heavy metal contaminants from electroplating effluent by hydrotalcite adsorbent with disulfide (S2-) intercalation
Publisher: Elsevier BV
Date: 2020
DOI: 10.1016/J.JHAZMAT.2019.121111
Abstract: Hydrotalcite materials are generally utilized for anionic pollutants due to its interlayered anion exchange ability. Their potentiality for cationic contaminants is rarely explored. In this study, disulfide (S
Enhancing visible-light photocatalytic performance of Au/TiO2 catalysts through light reflection-promoted optical absorption with oriented anatase mesocrystals
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D2TA09982A
Abstract: Au NPs effectively harvest light through absorption of light back-reflected from oriented TiO 2 mesocrystals supported on Ti foil. The enhanced light absorption facilitates the generation of electron–hole pairs and intensive EM fields that realizes efficient photocatalysis.
Reduction of Nitroaromatic Compounds on Supported Gold Nanoparticles by Visible and Ultraviolet Light
Publisher: Wiley
Date: 04-11-2010
Surface‐Plasmon‐Enhanced Transmetalation between Copper and Palladium Nanoparticle Catalyst
Publisher: Wiley
Date: 20-04-2022
Abstract: Surface‐plasmon‐mediated phenylacetylide intermediate transfer from the Cu to the Pd surface affords a novel mechanism for transmetalation, enabling wavelength‐tunable cross‐coupling and homo‐coupling reaction pathway control. C−C bond forming Sonogashira coupling and Glaser coupling reactions in O 2 atmosphere are efficiently driven by visible light over heterogeneous Cu and Pd nanoparticles as a mixed catalyst without base or other additives. The reaction pathway can be controlled by switching the excitation wavelength. Shorter wavelengths (400–500 nm) give the Glaser homo‐coupling diyne, whereas longer wavelength irradiation (500–940 nm) significantly increases the degree of cross‐coupling Sonogashira coupling products. The ratio of the activated intermediates of alkyne to the iodobenzene is wavelength dependent and this regulates transmetalation. This wavelength‐tunable reaction pathway is a novel way to optimize the product selectivity in important organic syntheses.
Tuning the reduction power of supported gold nanoparticle photocatalysts for selective reductions by manipulating the wavelength of visible light irradiation
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2CC17977F
Abstract: Gold nanoparticles supported on CeO(2) were found to be efficient photocatalysts for three selective reductions of organic compounds at ambient temperatures, under irradiation of visible light their reduction ability can be tuned by manipulating the irradiation wavelength.
Visible-light photocatalytic selective oxidation of C(sp3)–H bonds by anion–cation dual-metal-site nanoscale localized carbon nitride
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1CY00328C
Abstract: Anion–cation dual-metal-site nanoscale localized carbon nitride exhibits a significantly enhanced photocatalytic activity for the oxidation of alkanes and alcohols with a high activity and a wide functional group tolerance.
Highly efficient and selective photocatalytic hydroamination of alkynes by supported gold nanoparticles using visible light at ambient temperature
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3CC38985E
Abstract: The direct hydroamination of alkynes driven by visible light can be achieved in high yield and selectivity at ambient temperature using supported gold nanoparticles (AuNPs) as photocatalysts. Aniline molecules interact with visible light activated AuNPs meanwhile alkynes could be activated at active sites on the support. The findings reveal a new green approach for synthesis of fine organic compounds and provide insight into catalyst design for the activation of C≡C triple bonds and amines.
Oxidative Esterification of 5-Hydroxymethylfurfural into Dimethyl 2,5-Furandicarboxylate Using Gamma Alumina-Supported Gold Nanoparticles
Publisher: American Chemical Society (ACS)
Date: 10-02-2021
Non-plasmonic Ni nanoparticles catalyzed visible light selective hydrogenolysis of aryl ethers in lignin under mild conditions
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1GC01953H
Abstract: A visible-light-driven procedure using non-plasmonic and non-precious Ni nanoparticles was developed for the selective hydrogenolysis of lignin aryl ether bonds under mild conditions.
Alloying Gold with Copper Makes for a Highly Selective Visible-Light Photocatalyst for the Reduction of Nitroaromatics to Anilines
Publisher: American Chemical Society (ACS)
Date: 12-02-2016
Quantifying the influence of surface physico-chemical properties of biosorbents on heavy metal adsorption
Publisher: Elsevier BV
Date: 11-2019
DOI: 10.1016/J.CHEMOSPHERE.2019.06.074
Abstract: Heavy metals present in industrial wastewater contribute to human and ecosystem health risk when discharged without proper treatment. Low-cost biosorbents with high metal-binding capacity are increasingly being utilized for the removal of heavy metals. Inherent physico-chemical properties of biosorbents significantly influence their adsorption capacity. Studies quantifying the influence exerted by these properties on adsorption capacity are scarce. This study quantifies the influence and relative importance of selected physico-chemical properties on the adsorption capacity of three alent heavy metals Cu
Photocatalytic conversion of sugars to 5-hydroxymethylfurfural using aluminium(III) and fulvic acid
Publisher: Springer Science and Business Media LLC
Date: 08-2023
DOI: 10.1038/S41467-023-40090-7
Abstract: 5-hydroxymethylfurfural (HMF) is a valuable and essential platform chemical for establishing a sustainable, eco-friendly fine-chemical and pharmaceutical industry based on biomass. The cost-effective production of HMF from abundant C6 sugars requires mild reaction temperatures and efficient catalysts from naturally abundant materials. Herein, we report how fulvic acid forms complexes with Al 3+ ions that exhibit solar absorption and photocatalytic activity for glucose conversion to HMF in one-pot reaction, in good yield (~60%) and at moderate temperatures (80 °C). When using representative components of fulvic acid, catechol and pyrogallol as ligands, 70 and 67% HMF yields are achieved, respectively, at 70 °C. Al 3+ ions are not recognised as effective photocatalysts however, complexing them with fulvic acid components as light antennas can create new functionality. This mechanism offers prospects for new green photocatalytic systems to synthesise a range of substances that have not previously been considered.
Aerobic Oxidation of 5-Hydroxymethyl-furfural to 2,5-Furandicarboxylic Acid at 20 °C by Optimizing Adsorption on AgPd Alloy Nanoparticle Catalysts
Publisher: American Chemical Society (ACS)
Date: 09-2022
Enhancing Catalytic Performance of Palladium in Gold and Palladium Alloy Nanoparticles for Organic Synthesis Reactions through Visible Light Irradiation at Ambient Temperatures
Publisher: American Chemical Society (ACS)
Date: 08-04-2013
DOI: 10.1021/JA400527A
Abstract: The intrinsic catalytic activity of palladium (Pd) is significantly enhanced in gold (Au)-Pd alloy nanoparticles (NPs) under visible light irradiation at ambient temperatures. The alloy NPs strongly absorb light and efficiently enhance the conversion of several reactions, including Suzuki-Miyaura cross coupling, oxidative addition of benzylamine, selective oxidation of aromatic alcohols to corresponding aldehydes and ketones, and phenol oxidation. The Au/Pd molar ratio of the alloy NPs has an important impact on performance of the catalysts since it determines both the electronic heterogeneity and the distribution of Pd sites at the NP surface, with these two factors playing key roles in the catalytic activity. Irradiating with light produces an even more profound enhancement in the catalytic performance of the NPs. For ex le, the best conversion rate achieved thermally at 30 °C for Suzuki-Miyaura cross coupling was 37% at a Au/Pd ratio of 1:1.86, while under light illumination the yield increased to 96% under the same conditions. The catalytic activity of the alloy NPs depends on the intensity and wavelength of incident light. Light absorption due to the Localized Surface Plasmon Resonance of gold nanocrystals plays an important role in enhancing catalyst performance. We believe that the conduction electrons of the NPs gain the light absorbed energy producing energetic electrons at the surface Pd sites, which enhances the sites' intrinsic catalytic ability. These findings provide useful guidelines for designing efficient catalysts composed of alloys of a plasmonic metal and a catalytically active transition metal for various organic syntheses driven by sunlight.
Leveraging doping and defect engineering to modulate exciton dissociation in graphitic carbon nitride for photocatalytic elimination of marine oil spill
Publisher: Elsevier BV
Date: 07-2022
Metal Nanoparticle Photocatalysts: Synthesis, Characterization, and Application
Publisher: Wiley
Date: 28-05-2018
Surface‐Plasmon‐Enhanced Transmetalation between Copper and Palladium Nanoparticle Catalyst
Publisher: Wiley
Date: 20-04-2022
Abstract: Surface‐plasmon‐mediated phenylacetylide intermediate transfer from the Cu to the Pd surface affords a novel mechanism for transmetalation, enabling wavelength‐tunable cross‐coupling and homo‐coupling reaction pathway control. C−C bond forming Sonogashira coupling and Glaser coupling reactions in O 2 atmosphere are efficiently driven by visible light over heterogeneous Cu and Pd nanoparticles as a mixed catalyst without base or other additives. The reaction pathway can be controlled by switching the excitation wavelength. Shorter wavelengths (400–500 nm) give the Glaser homo‐coupling diyne, whereas longer wavelength irradiation (500–940 nm) significantly increases the degree of cross‐coupling Sonogashira coupling products. The ratio of the activated intermediates of alkyne to the iodobenzene is wavelength dependent and this regulates transmetalation. This wavelength‐tunable reaction pathway is a novel way to optimize the product selectivity in important organic syntheses.
Silver and palladium alloy nanoparticle catalysts: reductive coupling of nitrobenzene through light irradiation
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7DT00418D
Abstract: Silver and palladium alloy nanoparticle catalysts for reductive coupling of nitrobenzene through light irradiation.
Au–Pd alloy nanoparticle catalyzed selective oxidation of benzyl alcohol and tandem synthesis of imines at ambient conditions
Publisher: Elsevier BV
Date: 10-2014
Strongly interfacial-coupled 2D-2D TiO2 /g-C3 N4 heterostructure for enhanced visible-light induced synthesis and conversion
Publisher: Elsevier BV
Date: 07-2020
Tuning the reduction power of visible-light photocatalysts of gold nanoparticles for selective reduction of nitroaromatics to azoxy-compounds—Tailoring the catalyst support
Publisher: Elsevier BV
Date: 07-2017
Efficient Removal of Cationic and Anionic Radioactive Pollutants from Water Using Hydrotalcite-Based Getters
Publisher: American Chemical Society (ACS)
Date: 17-06-2016
Abstract: Hydrotalcite (HT)-based materials are usually applied to capture anionic pollutants in aqueous solutions. Generally considered anion exchangers, their ability to capture radioactive cations is rarely exploited. In the present work, we explored the ability of pristine and calcined HT getters to effectively capture radioactive cations (Sr(2+) and Ba(2+)) which can be securely stabilized at the getter surface. It is found that calcined HT outperforms its pristine counterpart in cation removal ability. Meanwhile, a novel anion removal mechanism targeting radioactive I(-) is demonstrated. This approach involves HT surface modification with silver species, namely, Ag2CO3 nanoparticles, which can attach firmly on HT surface by forming coherent interface. This HT-based anion getter can be further used to capture I(-) in aqueous solution. The observed I(-) uptake mechanism is distinctly different from the widely reported ion exchange mechanism of HT and much more efficient. As a result of the high local concentrations of precipitants on the getters, radioactive ions in water can be readily immobilized onto the getter surface by forming precipitates. The secured ionic pollutants can be subsequently removed from water by filtration or sedimentation for safe disposal. Overall, these stable, inexpensive getters are the materials of choice for removal of trace ionic pollutants from bulk radioactive liquids, especially during episodic environmental crisis.
Heterogeneous photocatalytic anaerobic oxidation of alcohols to ketones by Pt-mediated hole oxidation
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0CC03325A
Abstract: We report a platinum nanocluster/graphitic carbon nitride (Pt/g-C 3 N 4 ) composite solid catalyst with a photocatalytic anaerobic oxidation function for highly active and selective transformation of alcohols to ketones.
Direct photocatalysis of supported metal nanostructures for organic synthesis
Publisher: IOP Publishing
Date: 23-06-2017
Driving selective aerobic oxidation of alkyl aromatics by sunlight on alcohol grafted metal hydroxides
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2SC20114C
Non-plasmonic metal nanoparticles as visible light photocatalysts for the selective oxidation of aliphatic alcohols with molecular oxygen at near ambient conditions
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6CC05186C
Abstract: Non-plasmonic Pd NPs and Pt NPs exhibit superior visible light photocatalytic activity and distinctly different product selectivity in the oxidation of aliphatic alcohols.
Facile ultrasonic-assisted one-step preparation of sugarcane bagasse carbon sorbent for bio-based odor removal cat litter formulation
Publisher: Elsevier BV
Date: 11-2022
Visible light enhanced oxidant free dehydrogenation of aromatic alcohols using Au-Pd alloy nanoparticle catalysts
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3GC41866A
Highly efficient self-esterification of aliphatic alcohols using supported gold nanoparticles under mild conditions
Publisher: Elsevier BV
Date: 11-2016
AuCu/ZnO heterogeneous photocatalysts: Photodeposited AuCu alloy effect on product selectivity in alkene epoxidation
Publisher: Elsevier BV
Date: 04-2022
Photon Energy Threshold in Direct Photocatalysis with Metal Nanoparticles – Key Evidence from Action Spectrum of the Reaction
Publisher: American Chemical Society (ACS)
Date: 23-05-2017
DOI: 10.1021/ACS.JPCLETT.7B00941
Abstract: By investigating the action spectra (the relationship between the irradiation wavelength and apparent quantum efficiency of reactions under constant irradiance) of a number of reactions catalyzed by nanoparticles including plasmonic metals, nonplasmonic metals, and their alloys at near-ambient temperatures, we found that a photon energy threshold exists in each photocatalytic reaction only photons with sufficient energy (e.g., higher than the energy level of the lowest unoccupied molecular orbitals) can initiate the reactions. This energy alignment (and the photon energy threshold) is determined by various factors, including the wavelength and intensity of irradiation, molecule structure, reaction temperature, and so forth. Hence, distinct action spectra were observed in the same type of reaction catalyzed by the same catalyst due to a different substituent group, a slightly changed reaction temperature. These results indicate that photon-electron excitations, instead of the photothermal effect, play a dominant role in direct photocatalysis of metal nanoparticles for many reactions.
Catalytic Transformation of Aliphatic Alcohols to Corresponding Esters in O2under Neutral Conditions Using Visible-Light Irradiation
Publisher: American Chemical Society (ACS)
Date: 30-01-2015
DOI: 10.1021/JA511619C
Abstract: Selective oxidation of aliphatic alcohols under mild and base-free conditions is a challenging process for organic synthesis. Herein, we report a one-pot process for the direct oxidative esterification of aliphatic alcohols that is significantly enhanced by visible-light irradiation at ambient temperatures. The new methodology uses heterogenerous photocatalysts of gold-palladium alloy nanoparticles on a phosphate-modified hydrotalcite support and molecular oxygen as a benign oxidant. The alloy photocatalysts can absorb incident light, and the light-excited metal electrons on the surface of metal nanoparticles can activate the adsorbed reactant molecules. Tuning the light intensity and wavelength of the irradiation can remarkably change the reaction activity. Shorter wavelength light (<550 nm) drives the reaction more efficiently than light of longer wavelength (e.g., 620 nm), especially at low temperatures. The phosphate-exchanged hydrotalcite support provides sufficient basicity (and buffer) for the catalytic reactions thus, the addition of base is not required. The photocatalysts are efficient and readily recyclable. The findings reveal the first ex le of using "green" oxidants and light energy to drive direct oxidative esterification of aliphatic alcohols under base-free, mild conditions.
Separate or Simultaneous Removal of Radioactive Cations and Anions from Water by Layered Sodium Vanadate-Based Sorbents
Publisher: American Chemical Society (ACS)
Date: 05-08-2014
DOI: 10.1021/CM501846Z
Selective reductions using visible light photocatalysts of supported gold nanoparticles
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C2GC36542A
Visible-Light-Driven Efficient Cleavage of beta-O-4 Linkage in a Lignin Model Compound: Phenethyl Phenyl Ether Photocatalyzed by Titanium Nitride Nanoparticles
Publisher: American Chemical Society (ACS)
Date: 28-07-2021
Visible light-driven photocatalytic Heck reaction over carbon nanocoil supported Pd nanoparticles
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6CY01322H
Abstract: This paper presents a carbon nanocoil supported Pd nanoparticle system (Pd/CNCs) as a photocatalyst for coupling reaction of aryl halides and alkenes (Heck reaction) at 40 °C.
Silver oxide nanocrystals anchored on titanate nanotubes and nanofibers: promising candidates for entrapment of radioactive iodine anions
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3NR02412A
Abstract: Iodine radioisotopes are released into the environment by the nuclear industry and medical research institutions using radioactive materials. The (129)I(-) anion is one of the more mobile radioactive species due to a long half-life, and it is a great challenge to design long-term management solutions for such radioactive waste. In this study, a new adsorbent structure with the potential to efficiently remove radioactive iodine anions (I(-)) from water is devised: silver oxide (Ag2O) nanocrystals firmly anchored on the surface of titanate nanotubes and nanofibers via coherent interfaces between Ag2O and titanate phases. I(-) anions in fluids can easily access the Ag2O nanocrystals and be efficiently trapped by forming AgI precipitate that firmly attaches to the adsorbent. Due to their one-dimensional morphology, the new adsorbents can be readily dispersed in liquids and easily separated after purification and the adsorption beds loaded with the adsorbents can permit high flux. This significantly enhances the adsorption efficiency and reduces the separation costs. The proposed structure reveals a new direction in developing efficient adsorbents for the removal of radioactive anions from wastewater.
Efficient photocatalytic Suzuki cross-coupling reactions on Au–Pd alloy nanoparticles under visible light irradiation
Publisher: Royal Society of Chemistry (RSC)
Date: 26-06-2014
DOI: 10.1039/C4GC00588K
Promoting Ni(II) Catalysis with Plasmonic Antennas
Publisher: Elsevier BV
Date: 11-2019
Plasmonic switching of the reaction pathway: Visible-light irradiation varies the reactant concentration at the solid-solution interface of a gold-cobalt catalyst
Publisher: Wiley
Date: 18-06-2019
Abstract: Product selectivity of alkyne hydroamination over catalytic Au
Direct visible photoexcitation on palladium nanocatalysts by chemisorption with distinct size dependence
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D0CY02311F
Abstract: Direct photoexcitation of metal nanoparticles (NPs) can induce selective chemical reactions that are difficult to achieve with thermal energy.
Direct Photocatalytic Conversion of Aldehydes to Esters Using Supported Gold Nanoparticles under Visible Light Irradiation at Room Temperature
Publisher: American Chemical Society (ACS)
Date: 08-08-2014
DOI: 10.1021/JP505552V
Visible Light-Driven Cross-Coupling Reactions at Lower Temperatures Using a Photocatalyst of Palladium and Gold Alloy Nanoparticles
Publisher: American Chemical Society (ACS)
Date: 30-04-2014
DOI: 10.1021/CS5000284
Tuning the surface structure of nitrogen-doped TiO2 nanofibres - An effective method to enhance photocatalytic activities of visible-light-driven green synthesis and degradation
Publisher: Wiley
Date: 05-03-2013
Abstract: Nitrogen-doped TiO2 nanofibres of anatase and TiO2(B) phases were synthesised by a reaction between titanate nanofibres of a layered structure and gaseous NH3 at 400-700 °C, following a different mechanism than that for the direct nitrogen doping from TiO2. The surface of the N-doped TiO2 nanofibres can be tuned by facial calcination in air to remove the surface-bonded N species, whereas the core remains N doped. N-Doped TiO2 nanofibres, only after calcination in air, became effective photocatalysts for the decomposition of sulforhodamine B under visible-light irradiation. The surface-oxidised surface layer was proven to be very effective for organic molecule adsorption, and the activation of oxygen molecules, whereas the remaining N-doped interior of the fibres strongly absorbed visible light, resulting in the generation of electrons and holes. The N-doped nanofibres were also used as supports of gold nanoparticle (Au NP) photocatalysts for visible-light-driven hydroamination of phenylacetylene with aniline. Phenylacetylene was activated on the N-doped surface of the nanofibres and aniline on the Au NPs. The Au NPs adsorbed on N-doped TiO2(B) nanofibres exhibited much better conversion (80 % of phenylacetylene) than when adsorbed on undoped fibres (46 %) at 40 °C and 95 % of the product is the desired imine. The surface N species can prevent the adsorption of O2 that is unfavourable for the hydroamination reaction, and thus, improve the photocatalytic activity. Removal of the surface N species resulted in a sharp decrease of the photocatalytic activity. These photocatalysts are feasible for practical applications, because they can be easily dispersed into solution and separated from a liquid by filtration, sedimentation or centrifugation due to their fibril morphology.
Wavelength-Specific Product Desorption as a Key to Raising Nitrile Yield of Primary Alcohol Ammoxidation over Illuminated Pd Nanoparticles
Publisher: American Chemical Society (ACS)
Date: 31-01-2022
Analytical potential of surface-enhanced fourier transform raman spectroscopy on silver colloids
Publisher: SAGE Publications
Date: 08-1993
Abstract: Although FT-Raman is becoming an increasingly popular analytical tool, it has proved to be relatively insensitive for the analysis of solutions. This is a serious problem, particularly for studies in the biochemical area. Because resonance Raman is not available for near-infrared excitation, surface-enhanced Raman spectroscopy (SERS) provides an important pathway to improved sensitivity. This study is concerned with assessing the potential of SERS with FT-Raman as an analytical tool for aqueous solutions. The SERS effect was investigated for a variety of organic molecules, both nitrogen and non-nitrogen containing, with silver colloids prepared by different literature methods. Various factors were studied: the effect of colloid preparative method, age of the colloid, addition of potassium chloride, time after addition of analyte, and concentration of analyte. In some cases, an analyte gave no SERS effect with a particular colloid, but exhibited a large SERS effect with a colloid prepared by a different method.
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Amount: $284,000.00
Funder: Australian Research Council
View Funded ActivityLinkage Projects - Grant ID: LP210301424
Start Date: 06-2023
End Date: 05-2025
Amount: $245,000.00
Funder: Australian Research Council
View Funded Activity