Effects of heat treatment scheme on the photocatalytic activity of TiO2 nanotube powders derived by a facile electrochemical process

被引：31

作者：

Liao, Yulong ^{[1
]}

Que, Wenxiu ^{[1
]}

Tang, Zhenhua ^{[1
]}

Wang, Wenjuan ^{[1
]}

Zhao, Wenhan ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Elect Mat Res Lab, Sch Elect & Informat Engn, Xian 710049, Shaanxi, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2011年 / 509卷 / 03期

基金：

高等学校博士学科点专项科研基金; 中国国家自然科学基金;

关键词：

TiO2; nanotube; Heat treatment; Phase structure; Photocatalytic activity; TITANIA; DEGRADATION; FABRICATION;

D O I：

10.1016/j.jallcom.2010.09.175

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：

TiO2 nanotubes (NTs) in powder form were synthesized by a facile electrochemical process in a perchlorate-containing electrolyte. Transmission electron microscopy results indicate that the TiO2 NT-powder is in an amorphous structure and has outer diameter of 20 nm and tube-wall thickness of 5 nm. X-ray diffraction analysis reveals that phase composition of the annealed TiO2 NT-powders is related to the heat treatment scheme. Methyl orange was employed as a representative dye pollutant to evaluate the ultraviolet photocatalytic activity of the TiO2 NT-powders. It was found that different post heat treatment schemes affect greatly the photocatalytic activities of the TiO2 NT-powders, which should be ascribed to the changes in phase structural and morphological properties of the TiO2 NT-powders. These results indicate that there should be a balance between crystal phase and nanotubular configuration for achieving the best photocatalytic activity of the TiO2 nanotube powders. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：1054 / 1059

页数：6

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