Direct synthesis of vinyl-functionalized cubic mesoporous silica SBA-1

Hsien Ming Kao, Jyun Da Wu, Chun Chih Cheng, Anthony S.T. Chiang

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

Well-ordered cubic mesoporous silicas SBA-1 functionalized with vinyl groups have been synthesized via room temperature co-condensation of tetraethoxysilane (TEOS) and trimethoxyvinylsilane (TMVS) templated by cetyltriethylammonium bromide (CTEABr), a large headgroup surfactant, under strongly acidic conditions. The materials thus obtained were characterized by a variety of techniques including powder X-ray diffraction (XRD), solid-state NMR, FTIR, thermogravimetric analysis, scanning electron microscopy (SEM), and nitrogen sorption measurements. The HCl concentration was found to be a key factor that determines the stability of vinyl-functionalized SBA-1 towards the solvent extraction treatment. Direct evidence of the presence of chemically attached vinyl moieties was provided by solid-state 29Si and 13C NMR. SEM results revealed that the particle of vinyl-functionalized SBA-1 exhibited a highly isotropic morphology with more crystal faces than that of pure silica SBA-1. In contrast to the direct synthesis of vinyl-functionalized SBA-15, the concentration of TMVS that can co-condense with TEOS can be up to 25% without observing a significant loss in the long-range structure order and uncontrollable phase transformation of the cubic SBA-1 mesostructure.

Original languageEnglish
Pages (from-to)319-328
Number of pages10
JournalMicroporous and Mesoporous Materials
Volume88
Issue number1-3
DOIs
StatePublished - 21 Jan 2006

Keywords

  • Co-condensation
  • Mesoporous organosilica
  • Vinyl functionalization

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