Author(s): Bin Zhou1, 2, Jiuhui Qu1, Xu Zhao1, Huijuan Liu1 1.State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.2.Graduate University of Chinese Academy of Sciences, Beijing 100039, China
Pages: 151-159
Year: 2011 Issue:  1
Journal: Journal of Environmental Sciences
Keyword:  BiVO4 thin film;  degradation of pollutants;  photoelectrochemical process;
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°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(λ > 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.