Visible-light photocatalytic activity of nitrogen-doped TiO2 thin film prepared by pulsed laser deposition

被引：93
|
作者：
Zhao, Lei [1 ]
Jiang, Qing [1 ]
Lian, Jianshe [1 ]
机构：
[1] Jilin Univ, Minist Educ, Coll Mat Sci & Engn, Key Lab Automobile Mat, Changchun 130025, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2008年 / 254卷 / 15期
关键词：
visible-light photocatalytic activity; TiO2 thin film; Nitrogen; doped; Pulsed laser deposition;
D O I：
10.1016/j.apsusc.2008.01.069
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：
Nitrogen-doped titanium dioxide (TiO2-xNx) thin films have been prepared by pulse laser deposition on quartz glass substrates by ablated titanium dioxide ( rutile) target in nitrogen atmosphere. The x value ( nitrogen concentration) is 0.567 as determined by X- ray photoelectron spectroscopy measurements. UV-vis spectroscopy measurements revealed two characteristic deep levels located at 1.0 and 2.5 eV below the conduction band. The 1.0 eV level is attributable to the O vacancy state and the 2.5 eV level is introduced by N doping, which contributes to narrowing the band-gap by mixing with the O2p valence band. The enhanced degradation efficiency in a broad visible-light range was observed from the degradation of methylene blue and methylene orange by the TiO2-xNx film. (c) 2008 Elsevier B. V. All rights reserved.
引用
收藏
页码：4620 / 4625
页数：6
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