Synthetic nanoclays with the structure of montmorillonite: Preparation, structure, and physico-chemical properties

Nanosized layered silicates with a montmorillonite structure of varying composition were synthesized under hydrothermal conditions (350°C, 700 atm). The hydrothermal treatment was applied to gels with the compositions calculated with the use of an ideal formula of the final product Na 2 x (Al 2(1 −...

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Bibliographic Details
Published in:Glass physics and chemistry 2013-10, Vol.39 (5), p.533-539
Main Authors: Golubeva, O. Yu, Ul’yanova, N. Yu, Kostyreva, T. G., Drozdova, I. A., Mokeev, M. V.
Format: Article
Language:English
Subjects:
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Composites
Glass
Materials Science
Natural Materials
Physical Chemistry
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Summary:Nanosized layered silicates with a montmorillonite structure of varying composition were synthesized under hydrothermal conditions (350°C, 700 atm). The hydrothermal treatment was applied to gels with the compositions calculated with the use of an ideal formula of the final product Na 2 x (Al 2(1 − x ) , Mg 2 x ) Si 4 O 10 (OH) 2 · n H 2 O (0 ≤ x ≤ 1). The obtained samples were investigated by X-ray diffraction, IR and NMR spectroscopy, electron microscopy, and mercury porosimetry. The values of the cation-exchange capacity and specific surface are determined. The mean size of the particles of the synthesized samples is 40 ± 7 nm. A gradual substitution of aluminum for part of the magnesium in the initial gel made it possible to obtain samples with well-defined composition-dependent characteristics.
ISSN:1087-6596
1608-313X
DOI:10.1134/S1087659613050088