Dimethyl sulfoxide Species Entrapped by Raw and Acid-Activated Sepiolite Framework

Year 2016, Volume: 1 Issue: 1, 76 - 82, 09.08.2016

Ahmet Tabak , Beytullah Afşin , Bülent Çağlar , Sema Çağlar

Abstract

Novel hybrid
organic-clay materials were prepared by interaction of dimethyl sulfoxide
molecules in the interlayer space of raw and acid activated sepiolite
composites. The structural and thermal properties of the hybrid materials, raw and
acid activated sepiolite were examined by using Fourier transform infrared, thermal
analysis, X-ray powder diffraction and surface area measurement techniques. Thermal
analysis data prove the remarkable effects of acid activation on the framework
of sepiolite which are reflected by the intercalation mechanism proceeding
through the replacement partly of the interstitial water by dimethyl sulfoxide
species. The protons are directly involved in the actual structure and thus
enhances the thermal stability of the complex between dimethyl sulfoxide and
the sepiolite. The noticeable surface area increase of activated sepiolite than
that of the raw one is connected to the micropore formation. The data presented
in this study may also provide further insight into catalysis studies and the
application of clays in the growing field of environmental management.

Keywords

dimethyl sulfoxide, sepiolite, interstitial water

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