Influence of Sol-Gel Synthesis Parameters on the Microstructure of Particulate Silica Xerogels

被引：0
|
作者：
D. Laurence Meixner
Paul N. Dyer
机构：
[1] Air Products and Chemicals,
[2] Inc.,undefined
来源：
Journal of Sol-Gel Science and Technology | 1999年 / 14卷
关键词：
silica; hydrolysis; gelation; xerogel; microstructure;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The influence of key sol-gel synthesis parameters on the pore structure of microporous silica xerogels was investigated. The silica xerogels were prepared using an acid-catalyzed aqueous sol-gel process, with tetraethoxysilane (TEOS) as the silicon-containing precursor. At high H2O : TEOS ratios, sols synthesized at pH 2–3 yielded minimum values of mean micropore diameter and micropore volume. Analysis of the resulting Type I nitrogen adsorption isotherms and the equilibrium adsorption of N(C4F9)3 indicated micropore diameters for these xerogels of less than approximately 10 Å.
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页码：223 / 232
页数：9
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