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Journal of Materials Science

, Volume 32, Issue 6, pp 1623–1630 | Cite as

Effect of trivalent cation on the physicochemical properties of cobalt containing anionic clays

  • S KANNAN
  • C. S SWAMY
Article

Abstract

A series of cobalt containing hydrotalcites having the general formula CoMCO3-HT where M = Al, Fe and Cr were synthesized by sequential and coprecipitation methods. The samples were primarily characterized by X-ray diffraction (XRD), infrared absorption studies, transmission electron microscopy-energy dispersive X-ray analysis (TEM-EDAX), thermogravimetry-differential scanning calorimetry (TG-DSC) and BET surface area measurements. The lattice parameters, FTIR stretching wavelengths for O–H bonds and thermal stability depended on the ionic radius of the trivalent M cation. Thermal calcination of these materials yielded a non-stoichiometric spinel-type phase whose crystallinity was also affected by the nature of the trivalent cation.

Keywords

Hydrothermal Treatment Hydrotalcites Brucite Trivalent Cation Poor Crystallinity 

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Copyright information

© Chapman and Hall 1997

Authors and Affiliations

  • S KANNAN
    • 1
  • C. S SWAMY
    • 1
  1. 1.Department of ChemistryIndian Institute of TechnologyMadras-India

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