Partly zeolitized micro-mesoporous aluminosilicates SBA-15/ZSM-5 were synthesized by conversion of dry gel of template-containing SBA-15 in the presence of tetrapropylammonium hydroxide. They have a hexagonally ordered mesostructure and developed surface and mesoporosity for which the concentration and strength of the Brønsted and Lewis acid sites are higher than in AlSi-SBA-15. The formation of Brønsted acid sites of moderate strength in the samples with a low degree of zeolitization is due to the presence of ZSM-5 precursors as well as crystallites in the obtained aluminosilicates.
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Translated from Teoreticheskaya i Eksperimental’naya Khimiya, Vol. 53, No. 1, pp. 58-66, January-February, 2017.
V. G. Ilyin is Deceased.
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Barakov, R.Y., Shcherban, N.D., Yaremov, P.S. et al. Influence of SBA-15 Zeolitization Conditions on Structural-Sorption and Acidic Properties of Micro-Mesoporous AluminosilicateS SBA-15/ZSM-5. Theor Exp Chem 53, 60–68 (2017). https://doi.org/10.1007/s11237-017-9502-1
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DOI: https://doi.org/10.1007/s11237-017-9502-1