The effect of organic cation content on the interlayer spacing, surface area and porosity of methyltributylammonium-smectite

Oenal M., Sarikaya Y.

Colloids and Surfaces A: Physicochemical and Engineering Aspects, cilt.317, sa.1-3, ss.323-327, 2008 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 317 Sayı: 1-3
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1016/j.colsurfa.2007.10.029
  • Dergi Adı: Colloids and Surfaces A: Physicochemical and Engineering Aspects
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.323-327
  • Anahtar Kelimeler: basal spacing, methyltributy, ammonium cation, FTIR spectra, organomectites, pore volume, surface area, ADSORBED PARA-NITROPHENOL, CLAY-MINERALS, TRIMETHYLPHENYLAMMONIUM-SMECTITE, ALKYLAMMONIUM MONTMORILLONITES, ADSORPTION, INTERCALATION, ORGANOCLAYS, SORPTION, WATER, XRD
  • Ankara Üniversitesi Adresli: Evet

Özet

To examine the effect of the organic cation content on the porous structure of an organosmectite, a sodium-rich smectite (NaS) with a cation exchange capacity (CEC) of 1.08 mol kg-1 was intercalated with methyltributylammonium cations (MTBA+) equivalent to 0.2, 0.4, 0.6, 0.8, and 1.0 times the CEC. The prepared methyltributylammonium smectite (MTBAS) samples were examined by the X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy and low temperature nitrogen adsorption-desorption techniques. The basal spacing of the MTBASs, d(0 0 1), obtained from the XRD data, widens from 1.21 to 1.58 nm as the content of MTBA+ increase from 0 to 1.0 time the CEC. The FTIR spectra of the MTBASs display the typical bands related to NaS plus extra bands attributable to the presence of MTBA+. As the extent of intercalation increases the specific surface area (S) increases from 61 to 106 m2 g-1 and specific micro-mesopore volume (V) from 0.11 to 0.25 cm3 g-1. The increase in the S and V values shows that the intercalated MTBA+ cations simply act as pillars to hold the 2:1 layers of the NaS permanently apart, and therefore, the intercalation ends up with the formation an adsorptive-type organosmectite. Otherwise, it would be formed an organic partition nanophase and also a sorptive-type organosmectite. © 2007 Elsevier B.V. All rights reserved.