Abstract
Microporous silica (PS) with an ordered pore array of two-dimensional hexagonal symmetry was successfully prepared by regulated hydrolysis and co-condensation of tetramethoxysilane in decyltrimethylammonium bromide solution. The porous silica, PS, was silanized by 2-(3,4 epoxycyclohexyl) ethyltriethoxysilane to control hydrophilicity of the surface (PS-echx). The pore size of PS-echx was 0.8 nm, which is intermediate size between those of microporous aluminosilicate zeolites and conventional mesoporous silica, MCM-41 and MCM-48. PCS-echx exhibited significant water adsorptivity at low relative pressure region (P/P0 = 0.2), and low differential heats (44 and 50 kJ/mol, for the first and the second adsorption runs, respectively).
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