Effects of alcohol content and calcination temperature on the textural properties of bimodally mesoporous titania

被引：132

作者：

Yu, JG ^{[1
]}

Yu, JC

Ho, WK

Leung, MKP

Cheng, B

Zhang, GK

Zhao, XJ

机构：

[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synthesis & Proc, Wuhan 430070, Peoples R China

[2] Chinese Univ Hong Kong, Dept Chem, Mat Sci & Technol Res Ctr, Shatin, Hong Kong, Peoples R China

来源：

APPLIED CATALYSIS A-GENERAL | 2003年 / 255卷 / 02期

基金：

中国国家自然科学基金;

关键词：

bimodally mesoporous titania; titanium tetraisopropoxide; hydrolysis; calcination temperature; water content; porosity; phase composition;

D O I：

10.1016/S0926-860X(03)00570-2

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：

Bimodally mesoporous titania was prepared by hydrolysis of titanium tetraisopropoxide in pure water or the EtOH-H2O mixed solution under ultrasonic irradiation. Effects of alcohol content and calcination temperature on the phase composition and porosity of bimodally mesoporous titania was investigated by thermogravimetric and differential thermal analysis (TG-DTA), X-ray diffraction (XRD), scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET) surface areas. The results showed that for all TiO2 powders calcined from 400 to 600 degreesC, the pore size distribution is bimodal with fine intra-particle pore diameter at maximum pore diameters of ca. 2-4 nm and larger inter-particle pore diameter at maximum pore diameters of ca. 18-50 nm. The EtOH/H2O molar ratios obviously influenced the crystallization, crystallite size, BET surface areas, porosity and morphology of the prepared TiO2 powders. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：309 / 320

页数：12

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