Photo-induced charge separation and photocatalytic activity of Ga-doped SnO2

被引：11

作者：

Li, Jianzhang ^{[1
]}

Hu, Wei ^{[1
]}

Zhong, Junbo ^{[1
]}

Zeng, Jun ^{[1
]}

Huang, Shengtian ^{[1
]}

Xiao, Zhenghua ^{[1
]}

Li, Minjiao ^{[1
]}

机构：

[1] Sichuan Univ Sci & Engn, Coll Chem & Pharmaceut Engn, Key Lab Green Catalysis Higher Educ Inst Sichuan, Zigong 643000, Peoples R China

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2014年 / 116卷 / 04期

关键词：

PERFORMANCE; PHOTODEGRADATION; FABRICATION; BENZENE; LIGHT;

D O I：

10.1007/s00339-014-8428-x

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ga-doped SnO2 with different molar ratios of Ga/Sn (1, 2, 3, and 4 %) was prepared by a facile co-precipitation route. The photocatalysts prepared were characterized by N-2 adsorption-desorption measurements, X-ray diffraction, UV/Vis diffuse reflectance spectroscopy, and scanning electron microscope. The separation efficiency of photo-generated charge was studied using benzoquinone as scavenger. Hydroxyl radicals produced during photocatalytic process were detected by a terephthalic acid photoluminescence probing technique. Doping Ga3+ into SnO2 can greatly enhance the separation efficiency of photo-induced charge and the formation rate of hydroxyl radicals. The superoxide radical is the main active species during the photocatalytic process. The catalytic activity of photocatalysts for decolorization of methyl orange in aqueous solution was investigated. Among the photocatalysts prepared, Ga-doped SnO2 with 3 %Ga possesses the best photocatalytic activity and the underlying mechanism is suggested.

引用

页码：2149 / 2156

页数：8

共 25 条

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