Aluminum-pillared clays: Decomposition of the intercalating species and textural properties

Pillared clays (PILCs) are microporous solids obtained by the intercalation of suitable clays with large polyoxicationic species which, in the process of preparation, are thermally decomposed into oxide species forming the pillars. In this work the thermal decomposition of the intercalating species-aluminum polyoxications-is studied by t.g.-d.s.c. and the results are compared with the chemical analysis. Textural properties of PILCs obtained by two methods are studied by nitrogen adsorption and the use of different reference materials, in order to analyze adsorption data, is discussed. (C) Elsevier Science inc. 1997.