Preparation of an active SO42-/TiO2 photocatalyst for phenol degradation under supercritical conditions

被引：92

作者：

Li, HX ^{[1
]}

Li, GS ^{[1
]}

Zhu, J ^{[1
]}

Wan, Y ^{[1
]}

机构：

[1] Shanghai Normal Univ, Dept Chem, Shanghai 200234, Peoples R China

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2005年 / 226卷 / 01期

基金：

上海市自然科学基金; 中国国家自然科学基金;

关键词：

supercritical drying; TiO2; nanoparticles; SO42--dopant; photocatalysis; phenol degradation;

D O I：

10.1016/j.molcata.2004.09.028

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：

SO42--doped TiO2 (SO42-/TiO2) nanoparticles (SO42-/TiO2) were prepared by the sol-gel method followed by drying the precursor in supercritical ethanol fluid. During the liquid-phase phenol photocatalytic degradation, the as-prepared SO42-/TiO2 exhibited higher activity and longer lifetime than either the undoped TiO2 or the SO42-/TiO2 obtained through direct drying, apparently as a result of the superiority of the supercritical drying and the promotion of the SO42--dopant. Based on various characterizations including XRD, TEM, XPS, FTIR, and photoluminescence spectra, and FTIR-pyridine thermodesorption, the crystallization degree, the surface area, the pore structure, the surface acidity and the surface electronic state of the as-prepared SO42-/TiO2, samples were investigated and their correlation to the catalytic properties was discussed. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：93 / 100

页数：8

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