Recovery of visible-light photocatalytic efficiency of N-doped TiO2 nanoparticulate films

被引：18

作者：

Mi, Lan ^{[1
]}

Xu, Peng ^{[1
]}

Shen, Hong ^{[1
]}

Wang, Pei-Nan ^{[1
]}

机构：

[1] Fudan Univ, State Key Lab Adv Photon Mat & Devices, Dept Opt Sci & Engn, Shanghai 200433, Peoples R China

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2008年 / 193卷 / 2-3期

基金：

中国国家自然科学基金;

关键词：

titanium dioxide; visible-light photocatalyst; mild heat; photocatalytic reusability;

D O I：

10.1016/j.jphotochem.2007.06.028

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：

Bare TiO2 and N-doped TiO2 nanoparticulate films in anatase phase were prepared on glass substrates by laser ablation of titanium target in O-2, N-2/O-2 and NH3/N-2/O-2 atmospheres, respectively. The nitrogen dopant concentration increased notably when a small amount of NH3 was added into the N-2/O-2 mixture. The film prepared in NH3/N-2/O-2 exhibited enhanced photoabsorption and photocatalytic ability in the visible-light region as compared with that produced in N-2/O-2. However, for all films, rapid deactivations were observed with operating time, leading to a poor reusability of the catalysts. With a simple and effective approach of mild heat treatment, the photocatalytic efficiency was completely recovered and the reusability of the film was greatly improved. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：222 / 227

页数：6

共 30 条

[1] Visible-light photocatalysis in nitrogen-doped titanium oxides [J].