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Concentration-dependent adsorption of CsI at the muscovite - electrolyte interface
DOI:
10.1021/acs.langmuir.8b00038
Authors:
Sander J. T.
Brugman
(Radboud University)
,
Eleanor R.
Townsend
(Radboud University)
,
Mireille M. H.
Smets
(Radboud University)
,
Paolo
Accordini
(Radboud University)
,
Elias
Vlieg
(Radboud University)
Co-authored by industrial partner:
No
Type:
Journal Paper
Journal:
Langmuir
State:
Published (Approved)
Published:
March 2018
Diamond Proposal Number(s):
15042
Abstract: The interfacial structure of muscovite in contact with aqueous CsI solutions was measured using surface X-ray diffraction for several CsI concentrations (2 - 1000 mM). At CsI concentrations up to 200 mM, Cs+ adsorption is likely hindered by H3O+, as both cations compete for the adsorption site above the muscovite hexagonal cavity. Above this concentration, more Cs+ adsorbs than is required to compensate the negatively charged muscovite surface, which means that co-adsorption of an anion takes place. The I− anion does not co-adsorb in an ordered manner. Moreover, the hydration ring and water layers do not change significantly as function of CsI concentration.
Subject Areas:
Chemistry,
Materials
Instruments:
I07-Surface & interface diffraction
Other Facilities: ESRF
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Technical Tags: