Abstract
Mesoporous silicas containing the functional group ≡Si(CH2)2P(O)(OC2H5)2 in the surface layer have been obtained using the template method (template—P123). Their treatment by a concentrated hydrochloric acid results in the formation of functional groups of the composition ≡Si(CH2)2P(O)(OH)2 that is in agreement with the IR spectroscopy data. It has been shown that the above treatment causes an increase of the sample specific surface area (up to 605 m2/g), sorption capacity, and pore diameter. As established by means of the CP/MAS NMR spectroscopy on 31P nuclei, the sample drying in vacuum at 110°C results in the formation of fragments ≡Si(CH2)2P(O)(OH)—OSi≡ with the content of 10–15 wt %. However, according to the TEM data, the sample mesoporous structure is retained.
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Original Russian Text © O.A. Dudarko, Yu.L. Zub, M. Barczak, A. Dabrowski, 2011, published in Fizika i Khimiya Stekla.
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Dudarko, O.A., Zub, Y.L., Barczak, M. et al. Template synthesis of mesoporous silicas containing phosphonic groups. Glass Phys Chem 37, 596–602 (2011). https://doi.org/10.1134/S1087659611060083
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DOI: https://doi.org/10.1134/S1087659611060083