title: Tungsten trioxide as a visible light photocatalyst for volatile organic carbon removal.
abstract: Tungsten trioxide (WO3) has been demonstrated to possess visible light photoactivity and presents a means of overcoming the UV-light dependence of photocatalysts, such as titanium dioxide. In this study, WO3 nanostructures have been synthesised by a hydrothermal method using sodium tungstate (Na2WO4·2H2O), sulphate precursors and pH as structure-directing agents and parameters, respectively. By altering the concentration of the sulphate precursors and pH, it was shown that different morphologies and phases of WO3 can be achieved. The effect of the morphology of the final WO3 product on the visible light photoactivity of ethylene degradation in the gas phase was investigated. In addition, platinum (Pt) was photodeposited on the WO3 structures with various morphologies to enhance the photocatalytic properties. It was found that the photocatalytic properties of the WO3 samples greatly depend on their morphology, chemical composition and surface modification. WO3 with a cuboid morphology exhibited the highest visible light photoactivity compared to other morphologies, while adding Pt to the surface improved the performance of certain WO3 structures.
authors.affiliation: Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia. yossywicaksana@gmail.com.
authors.forename: Yossy
authors.initials: Y
authors.lastname: Wicaksana
authors.affiliation: Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia. sanly@unsw.edu.au.
authors.forename: Sanly
authors.initials: S
authors.lastname: Liu
authors.affiliation: Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia. jason.scott@unsw.edu.au.
authors.forename: Jason
authors.initials: J
authors.lastname: Scott
authors.affiliation: Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia. r.amal@unsw.edu.au.
authors.forename: Rose
authors.initials: R
authors.lastname: Amal
mesh_terms: D002244:Carbon / Q000737:chemistry*; D002384:Catalysis; D005030:Ethylenes / Q000737:chemistry; D008027:Light; D049329:Nanostructures / Q000737:chemistry; D010087:Oxides / Q000737:chemistry*; D010777:Photochemistry / Q000379:methods; D010984:Platinum / Q000737:chemistry; D014414:Tungsten / Q000737:chemistry*; D014466:Ultraviolet Rays; D055549:Volatile Organic Compounds / Q000737:chemistry*
chemical_list: D005030:Ethylenes; D010087:Oxides; D055549:Volatile Organic Compounds; D010984:Platinum; D002244:Carbon; C036216:ethylene; C511604:tungsten oxide; D014414:Tungsten