Control of the specific surface area of silica by a sol–gel process using 2-methylpentane-2,4-diol
- 1 January 1995
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Materials Chemistry
- Vol. 5 (11) , 1893-1897
- https://doi.org/10.1039/jm9950501893
Abstract
An improved method for the preparation of porous silica xerogels is described. Tetraethoxysilane (TEOS) as the starting alkoxide is modified by transesterification with 2-methylpentane-2,4-diol (MPD) prior to hydrolysis. The specific surface area and the pore size distribution of the calcined gels can be easily controlled by variation of the preparation parameters. Thus, a xerogel exhibiting a specific surface area of 1108 m2 g–1 was obtained after calcination at 450 °C for 4 h. The species formed by the transesterification of tetramethoxysilane (TMOS) with MPD were studied by 29Si NMR spectroscopy and chemical ionisation mass spectroscopy (CI MS).Keywords
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