The spectral, structral and thermal characterizations of dimethyl sulphoxide, pyridine, ethanolamine and N-methyl formamide intercalated kaolinites

Çağlar B., Afsin B., Eren E., Tabak A., Çırak Ç., Çubuk O.

Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences, cilt.65, sa.11, ss.1009-1019, 2010 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 65 Sayı: 11
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1515/zna-2010-1111
  • Dergi Adı: Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED)
  • Sayfa Sayıları: ss.1009-1019
  • Anahtar Kelimeler: Inner-surface hydroxyls, Intercalation, Kaolinite, Thermal analysis, XRD
  • Erzincan Binali Yıldırım Üniversitesi Adresli: Evet

Özet

The intercalation of dimethyl sulphoxide (DMSO), pyridine (Py), ethanolamine (Ea), and Nmethyl formamide (NMF) molecules into the kaolinite interlayers led to an appreciable decrease of 3697 cm-1 of the hydroxyl band. The appearance of the peaks at 3662, 3541, and 3504 cm-1 proved that the DMSO species are intercalated between the kaolinite layers through forming H-bonds with internal-surface hydroxyl groups. The intensities of the 942 and 796 cm-1 bending peaks arising from inner-surface hydroxyls decreased and new vibrational features appeared due to the intercalation of the guest species. The d001 value of pure kaolinite was found at 7.18 Å, and the d001 values were seen at 11.26, 11.62, 10.77, and 10.67 Å for kaolinite-dimethyl sulphoxide (K-DMSO), kaolinite-pyridine (K-Py), kaolinite-ethanolamine (K-EA), and kaolinite-N-methyl formamide (K-NMF) composites, respectively. The endothermic differential thermal analysis (DTA) peaks at a temperature of 108 - 334°C reflected the changes in the physicochemical properties of the intercalated species. The thermal stability increase followed the order of K-Py