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X-ray photoelectron...
X-ray photoelectron spectroscopy of fast-frozen hematite colloids in aqueous solutions. 2. tracing the relationship between surface charge and electrolyte adsorption
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- Boily, Jean-Francois (författare)
- Umeå universitet,Kemiska institutionen
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- Shchukarev, Andrey (författare)
- Umeå universitet,Kemiska institutionen
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(creator_code:org_t)
- 2010-01-27
- 2010
- Engelska.
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Ingår i: The Journal of Physical Chemistry C. - : American Chemical Society (ACS). - 1932-7447 .- 1932-7455. ; 114:6, s. 2613-2616
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Colloidal-sized hematite spheroids exposed to aqueous NaCl solutions were investigated by X-ray photoelectron spectroscopy using the fast-frozen technique. The O 1s region provided evidence for (de)protonation reactions of surface (hydr)oxo groups of OH-enriched/O-depleted hematite Surfaces. These results were also correlated to changes in sodium (Na 1s) and chloride (Cl 2p) contents with pH. Electrolyte ion surface loadings were successfully predicted using a classic thermodynamic adsorption model normalized for surface site density. These efforts pointed to ion-specific inner-Helmholtz plane capacitances.
Nyckelord
- solution interface
- water interface
- ion adsorption
- crystal faces
- xps
- goethite
- models
- coagulation
- particles
- stability
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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