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

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

References

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