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Structural changes in phenol-intercalulated hydrotalcite caused by heating

Published online by Cambridge University Press:  09 July 2018

J. Cornejo ,
R. Celis ,
I. Pavlovic ,
M. A. Ulibarri  and
M. C. Hermosín
J. Cornejo*
Affiliation:
Instituto de Recursos Naturales y Agrobiología de Sevilla, CSIC, Apdo 1052, 41080 Sevilla, Spain
R. Celis
Affiliation:
Instituto de Recursos Naturales y Agrobiología de Sevilla, CSIC, Apdo 1052, 41080 Sevilla, Spain
I. Pavlovic
Affiliation:
Facultad de Ciencias, Departamento de Química Inorgánica e Ingenieńa Química, Universidad de Córdoba, 14004 Córdoba, Spain
M. A. Ulibarri
Affiliation:
Facultad de Ciencias, Departamento de Química Inorgánica e Ingenieńa Química, Universidad de Córdoba, 14004 Córdoba, Spain
M. C. Hermosín
Affiliation:
Instituto de Recursos Naturales y Agrobiología de Sevilla, CSIC, Apdo 1052, 41080 Sevilla, Spain
*
*E-mail: cornejo@irnase.csic.es
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Abstract

Thermal analysis (DTA-TG-DTG), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, nitrogen adsorption and mercury intrusion porosimetry techniques were used to assess the structural changes induced upon heating of two hydrotalcite-phenol (trichloro- and trinitrophenol, HT-TCP and HT-TNP) complexes, and the results were compared with those obtained for the original hydrotalcite (HT) sample. The DTA revealed thermal effects that depended on the nature of the interlayer ion in the complexes. The total weight loss (TG-DTA) increased from 37% for the original HT to 40% for HT-TCP and 77% HT-TNP, as the amount of phenol increased. The XRD and FTIR spectroscopy showed that the calcination product (550°C) of the HT-phenol complexes was indistinguishable from that formed from the original HT. Since HT-phenol complexes were prepared by phenol adsorption on calcined HT, our results confirm the recyclability of HT-like compounds as sorbents for phenols.

Keywords

Hydrotalciteinterlayered complexesorganic anionsphenolsporosityspecific surface areathermal analysis
Type
Research Article
Information
Clay Minerals , Volume 35 , Issue 5 , December 2000 , pp. 771 - 779
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2000

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