Synergetic effect of Bi2WO6 photocatalyst with C60 and enhanced photoactivity under visible irradiation

被引：334

作者：

Zhu, Shengbao

Xu, Tongguang

Fu, Hongbo

Zhao, Jincai

Zhu, Yongfa ^{[1
]}

机构：

[1] Tsing Hua Univ, Dept Chem, Beijing 100084, Peoples R China

[2] Fudan Univ, Dept Environm Sci & Engn, Shanghai 200433, Peoples R China

[3] Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 2007年 / 41卷 / 17期

关键词：

D O I：

10.1021/es070953y

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Fullerene (C-60)-modified Bi2WO6 photocatalyst is prepared by a simple absorbing process. The as-prepared samples show the high efficiency for the degradation of nonbiodegradable azodyes methylene blue (MB) and rhodamine B (RhB) under visible light (lambda > 420 nm) and simulated solar light (lambda > 290 nm). After being modified by C60, the photocatalytic activities of Bi2WO6 samples increase about 5.0 and 1.5 times for the degradation of MB and RhB under visible light irradiation, whereas 4.6 and 2.1 times under xenon lamp irradiation, respectively. The enhanced photocatalytic activity for C-60-modified Bi2WO6 comes from the high migration efficiency of photoinduced electrons on the interface Of C-60 and Bi2WO6 which is produced by the interaction of Bi2WO6 and C-60 with the conjugative,pi-system. The optimum synergetic effect is found at a weight ratio of 1.25 wt % (C-60/Bi2WO6). The photocatalytic reaction process Of C60-modified Bi2WO6 is mainly governed by direct holes and O-2(center dot-) oxidation.

引用

页码：6234 / 6239

页数：6

共 26 条

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