Selective preparation of monoclinic and tetragonal BiVO4 with scheelite structure and their photocatalytic properties

被引：1017

作者：

Tokunaga, S ^{[1
]}

Kato, H ^{[1
]}

Kudo, A ^{[1
]}

机构：

[1] Sci Univ Tokyo, Fac Sci, Dept Appl Chem, Shinjuku Ku, Tokyo 1628601, Japan

来源：

CHEMISTRY OF MATERIALS | 2001年 / 13卷 / 12期

关键词：

D O I：

10.1021/cm0103390

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

BiVO4 powder with scheelite structure was obtained by hydrolyzing a nitric acid solution of Bi(NO3)(3) and Na3VO4 with bases (Na2CO3 and NaHCO3) at room temperature. Tetragonal BiVO4 of a high-temperature form was obtained after 4.5 h of preparation time while monoclinic BiVO4 was done after 46 h. Although the structure and the band gap of tetragonal BiVO4 with scheelite structure were similar to those of monoclinic BiVO4, the photocatalytic activity of the tetragonal BiVO4 for O-2 evolution from an aqueous AgNO3 solution under visible light irradiation was negligible. In contrast, the monoclinic BiVO4 showed high photocatalytic activity. Distortion of a Bi-O polyhedron by a 6s(2) lone pair of Bi3+ plays an important role for high photocatalytic activity of the monoclinic BiVO4 under visible light irradiation.

引用

页码：4624 / 4628

页数：5

共 31 条

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