Incorporating SnO2.xH2O into the Interlayer Spacings of Montmorillonite

Kiricsi, Imre and Pálinkó, István and Tasi, Gyula and Hannus, István (1994) Incorporating SnO2.xH2O into the Interlayer Spacings of Montmorillonite. MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 244 (1). pp. 149-154. ISSN 1058-725X

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Abstract

SnO2. xH2O was incorporated into the silicate layers of Na-montmorillonite (SnO2. xH2O-Mont) via the hydrolysis of (NH4)2SnCl6 in an aqueous slurry of Na-montmorillonite (Mont). The air-dried material and samples treated at various temperatures were characterized by X-ray diffractometry, X-ray fluorescence and infrared spectroscopies, derivatography and BET measurements. It was found that partially hydrated SnO2 was precipitated inside the silicate layers. Upon heat treatment dehydration/dehydroxylation occurred, thus, the strength of hydrogen bonding holding the introduced substance in the layered structure decreased. From 393 K the SnO2 started to migrate onto the outer surface and above 673 K finely dispersed, clay-supported SnO2 was formed.

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