Fabrication and photoelectrocatalytic properties of nanocrystalline monoclinic BiVO_4 thin-film electrode  

作　　者：Bin Zhou Jiuhui Qu Xu Zhao Huijuan Liu 

机构地区：[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, Belling 100039, China

出　　处：《Journal of Environmental Sciences》2011年第1期151-159,共9页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No.50778172);the Creative Research Groups of China (No.50621804)

摘　　要：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℃, 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 0. 〉 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.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℃, 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 0. 〉 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.

关 键 词：BiVO4 thin film degradation of pollutants photoelectrochemical process 

分 类 号：TQ645.6[化学工程—精细化工] O657.1[理学—分析化学]