Preparation of monolithic titania aerogels with high surface area by a sol-gel process combined surface modification

被引：31

作者：

Yang, Hui ^{[1
]}

Zhu, Wenjun ^{[1
]}

Sun, Sai ^{[1
]}

Guo, Xingzhong ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Mat Sci & Engn, Hangzhou 310003, Zhejiang, Peoples R China

来源：

RSC ADVANCES | 2014年 / 4卷 / 62期

基金：

中国国家自然科学基金;

关键词：

26;

D O I：

10.1039/c4ra03812f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Monolithic titania (TiO2) aerogels with high surface area were successfully synthesized by the sol-gel process combined surface modification, followed by ambient pressure drying to remove the solvents from the gels. The effects of surface modification used polyethylene glycol (PEG) 2000 as surfactant on the gelation and microstructure of the aerogel were studied in detail. The resultant aerogel with the PEG 2000:TBOT (molar ratio) of 0.005 exhibits specific surface area as high as 495 m(2) g(-1), apparent density of 0.716 g cm(-3) and porosity of 81.6%. The crystallization of aerogels after heat-treatment does not spoil the monolithic shape and morphology of the aerogel basically, and the specific surface area still keeps a relatively high value of 209 m(2) g(-1). The facile route provides a low-cost strategy for the preparation of metal oxide aerogels with high surface area.

引用

页码：32934 / 32940

页数：7

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