Synthesis and photocatalytic activity of mesoporous TiO2 with the surface area, crystallite size, and pore size

被引：242

作者：

Kim, Dong Suk ^{[1
]}

Han, Shin Jung ^{[1
]}

Kwak, Seung-Yeop ^{[1
]}

机构：

[1] Seoul Natl Univ, Dept Mat Sci & Engn, Seoul 151744, South Korea

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2007年 / 316卷 / 01期

关键词：

mesoporous TiO2; photocatalytic activity; calcination temperature; pore size; porous structure;

D O I：

10.1016/j.jcis.2007.07.037

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：

Mesoporous TiO2 materials with various pore-size distributions were synthesized by using diblock copolymers via a sol-gel process in aqueous solution. The properties of these materials were characterized by FE-SEM, HR-TEM, XRD, DRS, BET, and BJH analysis. All particles have spherical morphology with a diameter range of 1-3 mu m. The mesoporous TiO2 materials calcined at 400 degrees C were found to have different specific surface areas-186, 2 10, and 192 m(2) g(-1) -and average pore sizes depending on the type of diblock copolymer-5.1, 6.1, and 6.4 nm-and their crystallite sizes were found to be 8.1, 8.3, and 8.8 nm. The photocatalytic activity of each sample was investigated by measuring the photodecomposition of methylene blue (MB), and the small crystallite size, large surface area, and small pore size were found to exhibit better photocatalytic activities. In addition, the photocatalytic activities of all the mesoporous TiO2 materials were found to be better than that of commercial TiO2. (C) 2007 Elsevier Inc. All rights reserved.

引用

页码：85 / 91

页数：7

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