Journal ArticleDOI
Facile and controlled synthesis of aligned WO3 nanorods and nanosheets as an efficient photocatalyst material.
TLDR
The synthesized WO3 nanostructures showed improved photocatalytic activity for the photodegradation of MB dye, and the enhanced photocatallytic activity of WO1 nanosheets compared to WO2 nanorods for photodegrading of methylene blue (MB) dye could be due to the shape of the nanostructure of W O3.About:
This article is published in Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy.The article was published on 2017-03-15. It has received 69 citations till now. The article focuses on the topics: Band gap & Triclinic crystal system.read more
Citations
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Journal ArticleDOI
Advances on tungsten oxide based photochromic materials: strategies to improve their photochromic properties
TL;DR: Wang et al. as discussed by the authors summarized recent progress in different advanced strategies to improve WO3 photochromic properties, such as a fast photoresponse (within 1 min), strong and stable photochromism, visible-light coloration and reversible photo chromism.
Journal ArticleDOI
Well-controlled in-situ growth of 2D WO3 rectangular sheets on reduced graphene oxide with strong photocatalytic and antibacterial properties
Bilal Ahmed,Animesh K. Ojha,Ajeet Singh,Florian Hirsch,Ingo Fischer,Donfack Patrice,Arnulf Materny +6 more
TL;DR: It was found that RhB has a more positive potential compared to MB dye where O2- and OH̊ radicals interact more strongly, resulting in a greater degradation of the RhB dye.
Journal ArticleDOI
The kinetics of metal oxide photoanodes from charge generation to catalysis
Abstract: Generating charge carriers with lifetimes long enough to drive catalysis is a critical aspect for photoelectrochemical and photocatalytic systems, and a key determinant of their efficiency. Metal oxides are widely explored as photoanodes for photoelectrochemical water oxidation. However, their application is limited by the disparity between the picosecond–nanosecond lifetimes of electrons and holes photoexcited in bulk metal oxides versus the millisecond–second timescale of water oxidation catalysis. This Review addresses the charge-carrier dynamics underlying the performance of metal oxide photoanodes and their ability to drive photoelectrochemical water oxidation, alongside comparison with metal oxide function in photocatalytic and electrocatalytic systems. We assess the dominant kinetic processes determining photoanode performance, namely, charge generation, polaron formation and charge trapping, bulk and surface recombination, charge separation and extraction, and, finally, the kinetics of water oxidation catalysis. We examine approaches to enhance performance, including material selection, doping, nanostructuring, junction formation and/or co-catalyst deposition. Crucially, we examine how such performance enhancements can be understood from analyses of carrier dynamics and propose design guidelines for further material or device optimization. Metal oxides are widely used in photoelectrochemical and photocatalytic systems for fuel synthesis and environmental remediation. In this Review, we examine the kinetic challenges, from charge generation to water oxidation catalysis, that determine the performance of metal oxide photo(electro)catalysts.
Journal ArticleDOI
Water Oxidation and Electron Extraction Kinetics in Nanostructured Tungsten Trioxide Photoanodes.
Sacha Corby,Laia Francàs,Shababa Selim,Michael Sachs,Christopher S. Blackman,Andreas Kafizas,James R. Durrant +6 more
TL;DR: It is proposed that the relative absence of such recombination losses, and the observation of a photocurrent onset potential close to flat-band, result directly from the faster water oxidation kinetics of WO3, thus highlighting the potential importance of thermodynamic driving force for catalysis in outcompeting detrimental surface recombination processes.
Journal ArticleDOI
Sensitive and selective acetone sensor based on Gd doped WO3/reduced graphene oxide nanocomposite
TL;DR: In this paper, a sensitive and selective acetone sensor based on Gd doped WO3/reduced graphene oxide, a novel nanocomposite, has been reported.
References
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Journal ArticleDOI
Environmental Applications of Semiconductor Photocatalysis
TL;DR: The slow pace of hazardous waste remediation at military installations around the world is causing a serious delay in conversion of many of these facilities to civilian uses as discussed by the authors, which is a serious problem.
Journal ArticleDOI
Nano-sized transition-metal oxides as negative-electrode materials for lithium-ion batteries
TL;DR: It is reported that electrodes made of nanoparticles of transition-metal oxides (MO), where M is Co, Ni, Cu or Fe, demonstrate electrochemical capacities of 700 mA h g-1, with 100% capacity retention for up to 100 cycles and high recharging rates.
Journal ArticleDOI
Photoinduced reactivity of titanium dioxide
TL;DR: In this paper, photo-induced superhydrophilicity was used on the surface of a wide-band gap semiconductor like titanium dioxide (TiO 2 ) for photocatalytic activity towards environmentally hazardous compounds.
Journal ArticleDOI
Monodisperse α-Fe2O3 Mesoporous Microspheres: One-Step NaCl-Assisted Microwave-Solvothermal Preparation, Size Control and Photocatalytic Property
Shaowen Cao,Ying-Jie Zhu +1 more
TL;DR: A simple one-step NaCl-assisted microwave-solvothermal method has been developed for the preparation of monodisperse α-Fe2O3 mesoporous microspheres, and high photocatalytic activities in the degradation of salicylic acid are observed.
Journal ArticleDOI
Photoelectrolysis and physical properties of the semiconducting electrode WO2
TL;DR: In this article, the behavior of semiconducting electrodes for photoelectrolysis of water is examined in terms of the physical properties of the semiconductor and the photocurrent is described using a simple Schottky barrier.
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