Fabrication and photoelectrocatalytic properties of nanocrystalline monoclinicBiVO4 thin-film electrode
Bin Zhou , Jiuhui Qu , Xu Zhao , Huijuan Liu
DOI:
Received March 01, 2010,Revised May 21, 2010, Accepted , Available online
Volume 23,2011,Pages 151-159
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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 di raction, 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 di use 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 ( > 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.
