Structural characterization of aniline-bentonite composite by FTIR, DTA/TG, and PXRD analyses and BET measurement


Koksal E., Afsin B., Tabak A., Çağlar B.

Spectroscopy Letters, vol.44, no.2, pp.77-82, 2011 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 44 Issue: 2
  • Publication Date: 2011
  • Doi Number: 10.1080/00387010903555953
  • Journal Name: Spectroscopy Letters
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED)
  • Page Numbers: pp.77-82
  • Keywords: anline species, bentonite, intercalation, surface properties, thermal analysis
  • Erzincan Binali Yildirim University Affiliated: Yes

Abstract

The aniline species incorporated into the acid-activated bentonite matrices leads to the decay of the skeletal stretches centered at 1041 cm-1 and the rise of new features in the phenyl ring frequency region, 1700-1400 cm-1, demonstrates clearly the influence of the acid activation on the Lewis sites necessary for coordination of aniline to bentonite. The exothermic DTA features at 507, 684, and 725°C indicate the release of both the clusters and the decomposed fragments of the aniline-clay composite, and the highly stable carbonaceous residue, respectively. The basal difference by ∼1.0 nm and the much smaller surface area (33.8 m2/g) than that of the nonintercalated bentonite (129.2 m2/g) prove the presence of the tilted aniline species between the interlamellar grooves of the bentonite framework. Copyright © Taylor & Francis Group, LLC.