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Na-magadiite prepared in a water/alcohol medium: synthesis, characterization and use as a host material to prepare alkyltrimethylammonium- and Si-pillared derivates

Published online by Cambridge University Press:  09 July 2018

M. Sassi
Affiliation:
Laboratoire de Matériaux Minéraux, UMR CNRS 7016, Ecole Nationale Supérieure de chimie de Mulhouse, Université de Haute Alsace, 3 rue A. Werner, 68093 Mulhouse cedex, France Laboratoire de Chimie des Matériaux, Faculté des Sciences, BP 1524 El'M'Naouer, Université d'Oran, 31000 Oran, Algeria
J. Miehé-Brendlé*
Affiliation:
Laboratoire de Matériaux Minéraux, UMR CNRS 7016, Ecole Nationale Supérieure de chimie de Mulhouse, Université de Haute Alsace, 3 rue A. Werner, 68093 Mulhouse cedex, France
J. Patarin
Affiliation:
Laboratoire de Matériaux Minéraux, UMR CNRS 7016, Ecole Nationale Supérieure de chimie de Mulhouse, Université de Haute Alsace, 3 rue A. Werner, 68093 Mulhouse cedex, France
A. Bengueddach
Affiliation:
Laboratoire de Chimie des Matériaux, Faculté des Sciences, BP 1524 El'M'Naouer, Université d'Oran, 31000 Oran, Algeria
*

Abstract

Syntheses of Na-magadiite were performed under hydrothermal conditions in a water/alcohol medium. It is only possible to obtain a pure and well crystallized magadiite sample using a water/ethanol medium at a water/ethanol molar ratio of ∼0.12. As shown by thermal analysis and 1H liquid nuclear magnetic resonance spectroscopy, ethanol is not incorporated into the magadiite. Intercalation of dodecyl- and hexadecyltrimethylammonium cations in the interlayer space of Na-magadiite at different theoretical ion-exchange rates shows that the experimental ion-exchange rates are in good agreement with the theoretical ones. However, scanning electron micrographs of the sample having a theoretical ion exchange rate of 25–75% shows that the exchanges are not homogeneous (both thin and thick platelets are present). Attempts to obtain a Si-pillared compound starting from C16TMA-magadiite as the host material leads to a microporous compound having a BET surface area of 778 m2g-1.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2005

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