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Physicochemical and adsorption properties of a natural deposit containing 85% clinoptilolite have been studied. X-ray diffraction study revealed the presence of feldspar, quartz and mica admixtures. IR analysis has indicated a crystalline structure of the deposit and results of the low-temperature nitrogen adsorption have proved the presence of a bimodal porous system in the range of meso- and macropores...
The good quality MCM-41 materials were synthesized using tetraethoxysilane (TEOS) as silica source and C10 and C16 alkyltrimethylammonium bromide surfactants as templates. It is shown that the extension of time of the hydrothermal treatment process could be beneficial for improving the quality of the resulting MCM-41 samples. This approach seems to be especially useful for synthesis of the MCM-41...
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