期刊
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
卷 69, 期 5-6, 页码 1142-1146出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2007.10.029
关键词
nanostructures; non-crystalline materials; surfaces; sol-gel growth; microstructure
Periodic mesoporous benzene-silicas containing sulfonic acid groups were directly synthesized by the co-condensation of 1,4-bis (triethoxysilyl) benzene organosilica precursor and 3-mercaptopropyltrimethoxysilane (MeO)(3)Si(CH2)(3)SH in the presence of H2O2 using non-ionic block copolymer templates such as a Pluronic P123 (EO20PO70EO20) and poly(ethylene oxide)-poly(DL-lactic acid- co-glycolic acid)-poly(ethylene oxide) (EO16(L(29)G(7))EO16) under low acidic conditions. The sulfonic acid functional groups (-SO3H) were generated in situ by the oxidation of the propylthiol using H2O2 as an oxidant during the sol-gel synthetic process, which was observed by FT-IR and solid-state C-13 NMR spectroscopy. Well-defined 2D hexagonal (p6mm) mesostructures were also observed using BET, TEM, and SAXS measurements. The sulfonated mesoporous benzene-silicas prepared in this study also exhibit spherical macrostructures with diameters of 2-5 mu m. (C) 2007 Elsevier Ltd. All rights reserved.
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