Micro–mesoporous materials combining the structural and sorption characteristics of a mesoporous molecular sieve (MMS) and zeolite BEA were obtained by the “dry gel conversion” method – partial zeolitization of silica MMS SBA-15 in the presence of tetraethylammonium hydroxide. The volume of the mesopores reaches 0.65 cm3/g, while that of the micropores is in the region of 0.1 cm3/g. The acidity of the obtained zeolitized materials differs from that of BEA; the total concentration of medium-strength acid centers (maximum thermal desorption of ammonia at ~315 °C) amounts to 0.15 mmol/g.
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Translated from Teoreticheskaya i Éksperimental’naya Khimiya, Vol. 47, No. 4, pp. 246–251, July-August, 2001.
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Lysenko, N.D., Il’in, V.G. & Yaremov, P.S. Structural and sorption characteristics of the products from zeolitization of sba-15 in the presence of tetraalkylammonium hydroxides. Theor Exp Chem 47, 257–263 (2011). https://doi.org/10.1007/s11237-011-9213-y
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DOI: https://doi.org/10.1007/s11237-011-9213-y