Evidence of the influence of the cationic composition on the anionic affinity of layered double hydroxides

The effect of the cationic composition on the anionic affinity is evaluated by studying the reconstruction of the layered double hydroxide structure from mixed oxides obtained by the heat treatment of the Mg 4 Al 2 -layered double hydroxides solid solution, in aqueous solutions containing carbonates...

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Bibliographic Details
Published in:Journal of materials science 2013-08, Vol.48 (15), p.5273-5279
Main Authors: Delorme, Fabian, Seron, Alain, Vergnaud, Benoit, Galle-Cavalloni, Pierre, Jean-Prost, Veronique, Manguin, Julien
Format: Article
Language:English
Subjects:
Affinity
Analysis
Aqueous solutions
Carbonates
Cationic
Cations
Characterization and Evaluation of Materials
Chemical Sciences
Chemistry and Materials Science
Classical Mechanics
Composition effects
Crystallography and Scattering Methods
Heat treatment
Hydroxides
Iron
Material chemistry
Materials Science
Mixed oxides
Nitrates
Polymer Sciences
Solid Mechanics
Solid solutions
Sulfates
Surface active agents
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Summary:The effect of the cationic composition on the anionic affinity is evaluated by studying the reconstruction of the layered double hydroxide structure from mixed oxides obtained by the heat treatment of the Mg 4 Al 2 -layered double hydroxides solid solution, in aqueous solutions containing carbonates, sulfates, and nitrates. After synthesis, all the samples present the same c parameter whatever the iron content. After a thermal treatment at moderate temperature, amorphous mixed oxides are obtained from all the samples. The influence of the cationic composition is clearly demonstrated on the anionic affinity as the Mg 4 Al 2 -amorphous mixed oxides reconstructs the layered double hydroxide structure with 90 % carbonates and 10 % sulfates whereas the Mg 4 Fe 2 -amorphous mixed oxides reconstruct the layered double hydroxide structure with 89 % carbonates, 7 % sulfates, and 4 % nitrates. The nitrate ratio increases as the iron content increases.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-013-7318-5