A sonochemical route to visible-light-driven high-activity BiVO4 photocatalyst
Date
2006
Authors
Zhou, L.
Wang, W.
Liu, S.
Zhang, L.
Xu, H.
Zhu, W.
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Journal article
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Molecular Catalysis, 2006; 252(1-2):120-124
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Abstract
Visible-light-induced BiVO4 photocatalyst with monoclinic scheelite structure has been successfully synthesized via a facile sonochemical method. The as-prepared BiVO4 photocatalyst exhibited relatively high surface areas, consisting of primary nanocrystals with average size of ca. 50 nm. The BiVO4 nanocrystals showed a strong absorption in the visible light region and the band gap was estimated to be ca. 2.45 eV, representing an obvious blue-shift compared with that of the bulk sample. The photocatalytic activities were also evaluated by decolorization of methyl orange under visible light (λ > 400 nm). The results indicate that the photodegradation rate of as-prepared BiVO4 nanocrystals is quite high, up to 90% in 30 min, which is much better than that of the reference sample prepared by solid-state reaction (ca. 8%) and the standard photocatalyst P25 (ca. 6%) under the same conditions.
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Copyright 2006 Elsevier