Cadmium ion adsorption controls the growth of CdS nanoparticles on layered montmorillonite and calumit surfaces

I. Dékány, L. Turi, G. Galbács, J. H. Fendler

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

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 (χ1 = 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 generated in situ in 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.

Original languageEnglish
Pages (from-to)584-591
Number of pages8
JournalJournal of Colloid and Interface Science
Volume213
Issue number2
DOIs
Publication statusPublished - May 15 1999

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direct broadcast satellites
Bentonite
montmorillonite
Clay minerals
Cadmium
cadmium
Nanoreactors
Ions
Nanoparticles
Adsorption
nanoparticles
adsorption
Intercalation
Adsorption isotherms
intercalation
ions
isotherms
Ethanol
ethyl alcohol
lamella

Keywords

  • Adsorption
  • Calumite
  • CdS
  • Montmorillonite
  • Nanoparticle growing
  • Nanophase reactors

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry
  • Surfaces and Interfaces

Cite this

Cadmium ion adsorption controls the growth of CdS nanoparticles on layered montmorillonite and calumit surfaces. / Dékány, I.; Turi, L.; Galbács, G.; Fendler, J. H.

In: Journal of Colloid and Interface Science, Vol. 213, No. 2, 15.05.1999, p. 584-591.

Research output: Contribution to journalArticle

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