title: Fabrication and photoelectrocatalytic properties of nanocrystalline monoclinic BiVO4 thin-film electrode.
abstract: Monoclinic bismuth vanadate (BiVO4) thin film was fabricated on indium-tin oxide glass from an amorphous heteronuclear complex via dip-coating. After annealation at 400, 500, and 600 degrees C, the thin films were characterized by X-ray diffraction, field emission scanning electron microscopy, X-ray photoelectron spectroscopy, and UV-Vis spectrophotometry. The BiVO4 particles on the ITO glass surface had a monoclinic structure. The UV-Visible diffuse reflection spectra showed the BiVO4 thin film had photoabsorption properties, with a band gap around 2.5 eV. In addition, the thin film showed high visible photocatalytic activities towards 2,4-dichlorophenol and Bisphenol A degradation under visible light irradiation (lambda > 420 nm). Over 90% of the two organic pollutants were removed in 5 hr. A possible degradation mechanism of 2,4-dichlorophenol were also studied.
authors.affiliation: State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. zhoubien@gmail.com
authors.forename: Bin
authors.initials: B
authors.lastname: Zhou
authors.forename: Jiuhui
authors.initials: J
authors.lastname: Qu
authors.forename: Xu
authors.initials: X
authors.lastname: Zhao
authors.forename: Huijuan
authors.initials: H
authors.lastname: Liu
mesh_terms: D001559:Benzhydryl Compounds; D001729:Bismuth / Q000737:chemistry*; D002384:Catalysis / Q000528:radiation effects; D002733:Chlorophenols / Q000737:chemistry; D004560:Electricity; D055664:Electrochemical Techniques / Q000379:methods*; D004566:Electrodes; D008027:Light; D008855:Microscopy, Electron, Scanning; D053758:Nanoparticles / Q000737:chemistry*; D010084:Oxidation-Reduction / Q000528:radiation effects; D010636:Phenols / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet; D014638:Vanadates / Q000737:chemistry*; D014961:X-Ray Diffraction; D000098826:Bisphenol A Compounds
chemical_list: D001559:Benzhydryl Compounds; D001729:Bismuth; D002733:Chlorophenols; D010636:Phenols; D014638:Vanadates; C091754:bismuth vanadium tetraoxide; C006780:bisphenol A; D000098826:Bisphenol A Compounds; C004762:2,4-dichlorophenol