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
收藏
页码：204 / 207
页数：4
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