Directing the formation of vinyl-functionalized silica to the hexagonal SBA-15 or large-pore Ia3d structure

被引：130

作者：

Wang, YQ ^{[1
]}

Yang, CM ^{[1
]}

Zibrowius, B ^{[1
]}

Spliethoff, B ^{[1
]}

Lindén, M ^{[1
]}

Schüth, F ^{[1
]}

机构：

[1] MPI Kohlenforsch, D-45470 Mulheim, Germany

来源：

CHEMISTRY OF MATERIALS | 2003年 / 15卷 / 26期

关键词：

D O I：

10.1021/cm034769x

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：

Vinyl-functionalized ordered mesoporous silica can be prepared by co-condensation of tetraethoxysilane (TEOS) and triethoxyvinylsilane (TEVS) in the presence of the triblock copolymer Pluronic P123 (EO20PO70EO20) and inorganic salts such as NaCl. At low molar percentage of 10% TEVS, the hexagonal structure analogous to SBA-15 is obtained. With 15% TEVS, a less defined material, but probably closer to the cubic Ia3d structure, is formed. 20% TEVS leads to the formation of well-ordered Ia3d materials over a relatively wide range of temperatures and acid concentrations. The concentration of the added inorganic salts has an influence on the formation of a specific structure. The pore system can be made accessible by treatment with sulfuric acid at elevated temperatures, which selectively removes the copolymer template and does not lead to the cleavage of the Si-C bond. With use of the triblock. copolymer Pluronic F127 (EO106PO70EO106) as a template, a vinyl-functionalized structure analogous to SBA-16 can be synthesized.

引用

页码：5029 / 5035

页数：7

共 41 条

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