Cadmium Ion Adsorption Controls the Growth of CdS Nanoparticles on Layered Montmorillonite and Calumit Surfaces

Adsorption isotherms have been determined for the intercalation of cadmium ions (Cd2+) into layered hydrophobized montmorillonite (HDP-M) and calumit (DBS-C) sheets dispersed in ethanol (1)–cyclohexane (2) mixtures. The amount of Cd2+adsorbed depended strongly on the composition of the binary liquid...

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Bibliographic Details
Published in:Journal of colloid and interface science 1999-05, Vol.213 (2), p.584-591
Main Authors: Dékàny, I., Turi, L., Galbács, G., Fendler, J.H.
Format: Article
Language:English
Subjects:
adsorption
calumite
CdS
Chemistry
Exact sciences and technology
General and physical chemistry
General, apparatus
montmorillonite
nanoparticle growing
nanophase reactors
Surface physical chemistry
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Summary:Adsorption isotherms have been determined for the intercalation of cadmium ions (Cd2+) into layered hydrophobized montmorillonite (HDP-M) and calumit (DBS-C) sheets dispersed in ethanol (1)–cyclohexane (2) mixtures. The amount of Cd2+adsorbed depended strongly on the composition of the binary liquid; at an ethanol mole fraction of 0.05 (x1= 0.05), 95% of the added Cd2+is located in the ethanolic nanoreactor at the HDP-M (or DBS-C) surface. CdS nanoparticles have been generatedin situin ethanolic nanoreactors at the HDP-M and DBS-C surfaces. Absorption spectrophotometric measurements provided information on the number of CdS nanoparticles formed and on their absorption edges, bandgaps, and mean diameters. Good correlations have been obtained between the adsorption isotherms and the size (and the amount) of the CdS formed. X-ray diffractometry established that CdS nanoparticles stretched the HDP-M and DBS-C lamellas unevenly upon intercalation.
ISSN:0021-9797
1095-7103
DOI:10.1006/jcis.1999.6174