Preparation of SiO2-TiO2 Aerogels Using Supercritical Impregnation

被引：6

作者：

Satoshi Yoda

Katsuto Ohtake

Yoshihiro Takebayashi

Tsutomu Sugeta

Takeshi Sako

Tsugio Sato

机构：

[1] National Institute of Materials and Chemical Research,Institute for Chemical Reaction Science

[2] National Institute of Materials and Chemical Research,undefined

[3] Tohoku University,undefined

来源：

Journal of Sol-Gel Science and Technology | 2000年 / 19卷

关键词：

aerogels; silica; titania; impregnation; supercritical drying;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The preparation of SiO2-TiO2 aerogels by supercritical impregnation of titanium alkoxides into silica alcogels was investigated. A mixture of CO2 and 2-propanol with dissolved titanium tetraisopropoxide modified with acetylacetone was used as the impregnation medium. Prior to the experiments, the supercritical behaviour of the impregnation solution was investigated. The microstructure and properties of aerogels prepared by the supercritical impregnation method were almost identical to those generated by the liquid impregnation. However, the time for impregnation was substantially decreased and the homogeneity of the impregnated titanium distribution on the aerogel increased.

引用

页码：719 / 723

页数：4