Specific adsorption of organic cations at the silver iodide-electrolyte interface

A. de Keizer, L. G J Fokkink

Research output: Contribution to journalArticleResearchpeer-review

12 Citations (Scopus)

Abstract

The adsorption of monovalent tetrabutylammonium cations and bivalent bipyridinium cations diquat and paraquat on AgI has been studied as a function of surface charge density in 0.1 M indifferent (1-1) electrolyte. Adsorption results are analyzed according to the Frumkin-Fowler-Guggenheim isotherm. The model allows analysis of the several chemical and electrostatic free enthalpy contributions both to the lateral and to the adsorbent-adsorbate interactions. Hydrophobic interactions are shown to be the major non-Coulombic driving force for adsorption. The influence of adsorbate valency is consistently accounted for by the model.

Original languageEnglish
Pages (from-to)323-337
Number of pages15
JournalColloids and Surfaces
Volume51
Issue numberC
DOIs
Publication statusPublished - 1 Jan 1990
Externally publishedYes

Cite this

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Specific adsorption of organic cations at the silver iodide-electrolyte interface. / de Keizer, A.; Fokkink, L. G J.

In: Colloids and Surfaces, Vol. 51, No. C, 01.01.1990, p. 323-337.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Fokkink, L. G J

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AB - The adsorption of monovalent tetrabutylammonium cations and bivalent bipyridinium cations diquat and paraquat on AgI has been studied as a function of surface charge density in 0.1 M indifferent (1-1) electrolyte. Adsorption results are analyzed according to the Frumkin-Fowler-Guggenheim isotherm. The model allows analysis of the several chemical and electrostatic free enthalpy contributions both to the lateral and to the adsorbent-adsorbate interactions. Hydrophobic interactions are shown to be the major non-Coulombic driving force for adsorption. The influence of adsorbate valency is consistently accounted for by the model.

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