期刊
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
卷 48, 期 3, 页码 272-276出版社
SPRINGER
DOI: 10.1007/s10971-008-1820-2
关键词
Imidazolium ionic liquid; Xerogel silica; Morphology; Sol-gel; Acid catalyst
资金
- CNPq
- PIBIC/UFRGS
This article describes the preparation of xerogel silica's by the sol-gel technique in the presence of the ionic liquids (ILs) 1-triethylene glycol monomethyl ether-3-methylimidazolium methanesulfonate 1 and 1-monoethylene glycol monomethyl ether-3-methylimidazolium methanesulfonate 2, using tetraethoxysilane as precursor. The addition of water to these ILs resulted in the formation of protonic acid. As a consequence, the ILs functioned as morphology controller and acid pre-catalyst at the same time. Characterization of these materials was performed by photography, scanning electron microscopy, thermogravimetric analysis and powder X-ray diffraction. Compact lamellar monoliths with interlamellar distances of approximately 1.5 nm and flat surfaces were obtained with both ILs.
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