Enhanced photocatalytic activity of bismuth-tungsten mixed oxides for oxidative decomposition of acetaldehyde under visible light irradiation

被引：44
作者：
Amano, Fumiaki [1 ,2 ]
Nogami, Kohei [2 ]
Ohtani, Bunsho [1 ,2 ]
机构：
[1] Hokkaido Univ, Catalysis Res Ctr, Sapporo, Hokkaido 0010021, Japan
[2] Hokkaido Univ, Grad Sch Environm Sci, Sapporo, Hokkaido 0600810, Japan
来源：
CATALYSIS COMMUNICATIONS | 2012年 / 20卷
关键词：
Photocatalysis; Bi2WO6; Aurivillius phase; Nanoplate; Visible light; DEGRADATION; BI2WO6; ION;
D O I：
10.1016/j.catcom.2011.12.038
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：
Russelite bismuth tungstate (Bi2WO6) flake-ball particles prepared by a hydrothermal reaction method have been reported to be visible-light-responsive photocatalysts for mineralization of organic compounds. Here, we report new bismuth-tungsten mixed oxide particles with a tungsten-to-bismuth ratio (W/Bi ratio) in feed of 1.0, which is two-times higher than the stoichiometric ratio of Bi2WO6 (W/Bi = 0.50). Compared to the conventional Bi2WO6 flake-ball particles, the tungsten-rich particles exhibited a narrow band gap (2.70 eV), large specific surface area due to the rectangular platelet nanostructure. and high level of photocatalytic activity for oxidative decomposition of acetaldehyde. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：12 / 16
页数：5
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