Issue 5, 2000
From the journal:

Journal of the Chemical Society, Dalton Transactions

Thermodynamics of anion exchange on a chloride-intercalated zinc–aluminum layered double hydroxide: a microcalorimetric study

Yaël Israëli,a   Christine Taviot-Guého,b   Jean-Pierre Besse,b   Jean-Pierre Morela  and  Nicole Morel-Desrosiers*a  

* Corresponding authors

a Laboratoire de Thermodynamique des Solutions et des Polymères, UPRESA CNRS 6003, Université Blaise Pascal (Clermont-Ferrand II), 24 avenue des Landais, Aubière cedex, France
E-mail: nicole.morel@univ-bpclermont.fr

b Laboratoire des Matériaux Inorganiques, UPRESA CNRS 6002, Université Blaise Pascal (Clermont-Ferrand II), 24 avenue des Landais, Aubière cedex, France

Abstract

The thermodynamic properties of anion exchange on a chloride-intercalated zinc–aluminium layered double hydroxide have been studied at 298.15 K. The heats for total exchange of Cl− for F−, Br−, I−, OH−, NO3−, and SO42− have been determined by microcalorimetry and the standard molar enthalpies of these exchange reactions have been estimated. For the processes involving OH− and NO3−, the exchange isotherms have been determined using potentiometry in the former case and capillary ion analysis in the latter. The standard molar Gibbs free energy and entropy changes upon exchange of Cl− for OH− and exchange of Cl− for NO3− have been calculated as a function of the fraction of exchanged Cl−. These exchange processes appear to be entropy-driven, but the selectivity is controlled by the enthalpic contribution.

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Article information

DOI
https://doi.org/10.1039/A906346C
Article type
Paper
Submitted
04 Aug 1999
Accepted
07 Jan 2000
First published
08 Feb 2000

J. Chem. Soc., Dalton Trans., 2000, 791-796

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Thermodynamics of anion exchange on a chloride-intercalated zinc–aluminum layered double hydroxide: a microcalorimetric study

Y. Israëli, C. Taviot-Guého, J. Besse, J. Morel and N. Morel-Desrosiers, J. Chem. Soc., Dalton Trans., 2000, 791 DOI: 10.1039/A906346C

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