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
收藏
页码：207 / 214
页数：8
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