Photocatalytic property of Cu2+-doped Bi2O3 films under visible light prepared by the sol-gel method

被引：35

作者：

Qin, Wei ^{[1
]}

Qi, Jing ^{[2
]}

Wu, Xiaohong ^{[2
]}

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China

[2] Harbin Inst Technol, Dept Chem, Harbin 150001, Heilongjiang, Peoples R China

来源：

VACUUM | 2014年 / 107卷

基金：

中国国家自然科学基金;

关键词：

Doped; Bi2O3; Sol-gel; Photocatalytic property; OPTICAL-PROPERTIES; NANOSHEETS;

D O I：

10.1016/j.vacuum.2014.02.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The Cu2+-doped Bi2O3 films were prepared by the sol-gel method on a glass substrate. X-ray diffraction, atomic force microscopy techniques and spectrophotometry were applied to characterize these films. It was found that, compared with the undoped Bi2O3 film, the absorption peaks of the Cu2+-doped Bi2O3 films moved to longer wave-lengths. The visible light photocatalytic activities were evaluated by photodegradation of Rhodamine B. The results showed that photocatalytic activity under visible light irradiation was improved by adding Cu2+ ions into the films. When the molar ratio of Cu/Bi was 5/500, the sample showed the highest photocatalytic efficiency (96% at 120 min). The enhanced photocatalytic activity might result from the narrowed band-gap and effective separation of photogenerated electron/holes caused by Cu2+ doping. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：204 / 207

页数：4

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