Photocatalytic activity of TiO2 thin films by hydrogen DC plasma

被引：36
|
作者：
Mohammadizadeh, M. R. [1 ]
Bagheri, M. [1 ]
Aghabagheri, S. [1 ]
Abdi, Y. [2 ]
机构：
[1] Univ Tehran, Dept Phys, SRL, Tehran, Iran
[2] Univ Tehran, Dept Phys, Nanophys Res Lab, Tehran, Iran
来源：
APPLIED SURFACE SCIENCE | 2015年 / 350卷
关键词：
Titanium dioxide; Hydrogen doping; Thin films; Photocatalysis; Hydrogenation; SUPERHYDROPHILICITY PROPERTIES; SURFACE SCIENCE; 1ST-PRINCIPLES; NANOCRYSTALS; DEFECTS; NANOPARTICLES; NANOMATERIALS; ENHANCEMENT; TEMPERATURE; IMPROVEMENT;
D O I：
10.1016/j.apsusc.2015.03.196
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：
Thin layers of anatase titanium dioxide were coated on glass by spray pyrolysis method. The layers were hydrogenated by DC plasma from room temperature up to 350 degrees C. Hydrogen plasma treatment at low temperatures, leads to decrease the surface roughness, while surface roughness is increased by enhancing plasma temperature. Layers' band gap was decreased 0.13 eV by plasma treatment at highest temperature. Hydrophilicity and photocatalytic properties of the layers under plasma treatment at 150 and 200 degrees C were improved noticeably. However, plasma treatment at temperatures above 200 degrees C was lead to decrease hydrophilicity and photocatalytic activity of TiO2 layers. The reason seems formation of oxygen vacancies in the interior layers that act as charge carriers' recombination centers. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：43 / 49
页数：7
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