AgI/TiO2 nanobelts monolithic catalyst with enhanced visible light photocatalytic activity

被引：89

作者：

Yi, Junhui ^{[1
]}

Huang, Lingling ^{[1
]}

Wang, Hongjuan ^{[1
]}

Yu, Hao ^{[1
]}

Peng, Feng ^{[1
]}

机构：

[1] S China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510640, Guangdong, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2015年 / 284卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Photocatalyst; Monolithic catalyst; AgI/TiO2; Visible light; Photodegradation; TIO2 NANOTUBE ARRAYS; DEGRADATION; NANOPARTICLES; EFFICIENCY;

D O I：

10.1016/j.jhazmat.2014.11.020

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

AgI nanoparticles (NPs) have been decorated on the TiO2 nanobelts (NBs) immobilized on a metal Ti substrate by a simple impregnating-precipitation method. The as-achieved Agl/TiO2 monolithic catalyst exhibits a high and stable visible photocatalytic activity toward acid orange II (AO-II) degradation, which is attributed to the suitable energy band match of AgI NPs and TiO2 NBs, leading to the efficient transfer of photo-generated electrons. In addition, it was found that O-center dot(2)- radicals and h(+) are the main reactive species for the degradation of AO-II under visible light irradiation. A reasonable photocatalytic mechanism of Agl/TiO2 photocatalyst toward AO-II degradation was discussed. This monolithic catalyst provides an advantage over the drawback encountered with powder suspension. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：207 / 214

页数：8

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