Photocatalytic performance of α-, β-, and γ-Ga2O3 for the destruction of volatile aromatic pollutants in air

被引：257

作者：

Hou, Yidong ^{[1
]}

Wu, Ling ^{[1
]}

Wang, Xinchen ^{[1
]}

Ding, Zhengxin ^{[1
]}

Li, Zhaohui ^{[1
]}

Fu, Xianzhi ^{[1
]}

机构：

[1] Fuzhou Univ, Res Inst Photocatalysis, State Key Lab Breeding Base Photocatalysis, Fuzhou 350002, Peoples R China

来源：

JOURNAL OF CATALYSIS | 2007年 / 250卷 / 01期

基金：

中国国家自然科学基金;

关键词：

photocatalysis; Ga2O3; geometric structure; photoluminescence;

D O I：

10.1016/j.jcat.2007.05.012

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：

Three polymorphs of Ga2O3 (alpha-, beta-, and gamma-Ga2O3) were prepared, and their photocatalytic activities were evaluated by the decomposition of volatile aromatic compounds (e.g., benzene, toluene, and ethylbenzene) in dry air stream under UV light illumination at room temperature. It was found that the Ga2O3 catalysts exhibited much higher photocatalytic activity than commercial TiO2. The photocatalytic activities of the Ga2O3 polymorphs were strongly influenced by their crystal structure, and their specific activities decreased in the following order: beta-Ga2O3 > alpha-Ga2O3 > gamma-Ga2O3. The reasons for the differences in photocatalytic activity of the Ga203 polymorphs are discussed in terms of crystallinity, geometric structure, and electronic properties of the polymorphs. (c) 2007 Elsevier Inc. All rights reserved.

引用

页码：12 / 18

页数：7

共 44 条

[1]

Areán CO, 2000, MICROPOR MESOPOR MAT, V40, P35

[2] Palladium enhanced resistance to deactivation of titanium dioxide during the photocatalytic oxidation of toluene vapors [J].