Synthesis of Si-Based Mesoporous Materials with Different Structural Regularity

Abstract:

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Two types of mesoporous Si-MCM-41 materials were synthesized via a cationic surfactant template method using different Si-precursors. The materials obtained were characterized by FTIR, XRD, BET, TEM and 29Si MAS-NMR techniques. When fumed silica was used as Si precursor, a Si-MCM-41-I solid with wormhole-like pore topologies was obtained. However, when tetraethylorthosilicate (TEOS) was used as Si precursor, a mesoporous Si-MCM-41-II solid with hexagonal arranges and a long-range ordered structure could be obtained. These two kinds of mesoporous materials had a uniform pore size distribution with an average pore diameter within 2.3-2.8 nm. Rather weak Lewis acid sites were formed on both the Si-MCM-41 samples prepared by the two methods.

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Periodical:

Edited by:

Jin-An Wang, Guozhong Cao and José Manuel Domínguez

Pages:

38-44

DOI:

10.4028/www.scientific.net/AMR.132.38

Citation:

L. F. Chen et al., "Synthesis of Si-Based Mesoporous Materials with Different Structural Regularity", Advanced Materials Research, Vol. 132, pp. 38-44, 2010

Online since:

August 2010

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$35.00

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