TY - JOUR
T1 - Direct synthesis of vinyl-functionalized cubic mesoporous silica SBA-1
AU - Kao, Hsien Ming
AU - Wu, Jyun Da
AU - Cheng, Chun Chih
AU - Chiang, Anthony S.T.
N1 - Funding Information:
The financial support of this work by the National Science Council and Industrial Technology Research Center of Taiwan is gratefully acknowledged. The authors thank Dr. Hwo-Shuenn Sheu at National Synchrotron Radiation Research Center for acquiring XRD data.
PY - 2006/1/21
Y1 - 2006/1/21
N2 - 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.
AB - 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.
KW - Co-condensation
KW - Mesoporous organosilica
KW - Vinyl functionalization
UR - http://www.scopus.com/inward/record.url?scp=29244464658&partnerID=8YFLogxK
U2 - 10.1016/j.micromeso.2005.10.002
DO - 10.1016/j.micromeso.2005.10.002
M3 - 期刊論文
AN - SCOPUS:29244464658
SN - 1387-1811
VL - 88
SP - 319
EP - 328
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
IS - 1-3
ER -