Characterization and pillaring of a Turkish bentonite (Resadiye)

Tabak A., Afsın B., Caglar B., Koksal E.

Journal of Colloid and Interface Science, vol.313, no.1, pp.5-11, 2007 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 313 Issue: 1
  • Publication Date: 2007
  • Doi Number: 10.1016/j.jcis.2007.02.086
  • Journal Name: Journal of Colloid and Interface Science
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED)
  • Page Numbers: pp.5-11
  • Keywords: Al-pillared bentonites, Basal spacing, Cation exchange capacity, FTIR, Microporous composite, Thermal stability
  • Erzincan Binali Yildirim University Affiliated: No

Abstract

The shifts of the Si{single bond}O{single bond}Si stretching and the Si{single bond}O{single bond}Al and Si{single bond}O{single bond}Si bending modes, as well as the free silica peak in the IR spectra and the strengthening of the XRD reflections due to the quartz and α-cristobalite components of the Al-pillared bentonites (Wyoming and Resadiye), are ascribed to the formation of new Si{single bond}O{single bond}Al groups of covalent character. The mass losses in the temperature range 150-700 °C correspond to the dehydration and dehydroxylation processes. The total mass losses of the Al-pillared bentonites (Wyoming and Resadiye) are close to each other at an OH/Al ratio of 2.2, but calcination from 400 to 600 °C causes the surface area of the latter composite to decrease by 13%. © 2007 Elsevier Inc. All rights reserved.