Selective synthesis and visible-light photocatalytic activities of BiVO4 with different crystalline phases

被引：360

作者：

Zhang, Xi

Ai, Zhihui ^{[1
]}

Jia, Falong

Zhang, Lizhi

Fan, Xiaoxing

Zou, Zhigang

机构：

[1] Cent China Normal Univ, Coll Chem, Minist Educ, Key Lab Pesticide & Chem Biol, Wuhan 430079, Peoples R China

[2] Nanjing Univ, Dept Phys, ERERC, Nanjing 210093, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2007年 / 103卷 / 01期

基金：

中国国家自然科学基金;

关键词：

bismuth vanadate; selective synthesis; photocatalyst; visible-light;

D O I：

10.1016/j.matchemphys.2007.02.008

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Tetragonal and monoclinic bismuth vanadate (BiVO4) powders were selectively synthesized by aqueous processes. The characterizations of the as-prepared BiVO4 powders were carried out by X-ray diffraction, nitrogen adsorption, scanning electron microscopy and UV-vis diffuse reflectance spectroscopy. The photocatalytic activities of different BiVO4 samples were determined by degradation of methylene blue solution under visible-light irradiation (lambda > 420 nm) and compared with that of TiO2 (Degussa P25). The band gaps of the as-prepared BiVO4 were determined from UV-vis diffuse reflectance spectra. It was found that monoclinic BiVO4 with a band gap of 2.34 eV showed higher photocatalytic activity than that of tetragonal BiVO4 with a band gap of 3.11 eV. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：162 / 167

页数：6

共 35 条

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