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Surface Potential at the Hematite - water Interface (CROSBI ID 103461)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Kallay, Nikola ; Dojnović, Zvonimir ; Čop, Ana Surface Potential at the Hematite - water Interface // Journal of colloid and interface science, 286 (2005), 610-614-x

Podaci o odgovornosti

Kallay, Nikola ; Dojnović, Zvonimir ; Čop, Ana

engleski

Surface Potential at the Hematite - water Interface

Construction of a metal oxide electrode enabling measurements of surface potential is described. The electrode was made using the hematite monocrystal, which avoids the problems arising from the possible porosity of the oxide layer. The potential of this electrode was measured as a function of pH. The hematite electrode provides reproducible results, especially in the acidic region. Surface potentials were calculated from electrode potentials using the electrokinetic isoelectric point. The slope of surface potential with respect to pH was found to be lower than the Nernstian, especially in the basic region. The effect was more pronounced at higher ionic strengths. It was shown how the measurement of surface potential can help to interpret the equilibrium data and evaluate the choice of a theoretical model describing the interfacial equilibrium at the metal oxide-water interface.

surface potential; hematite electrode; hematite-water interface

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Podaci o izdanju

286

2005.

610-614-x

objavljeno

0021-9797

Povezanost rada

Kemija

Indeksiranost