Pregled bibliografske jedinice broj: 208960
Critical Evaluation of the Surface Complexation Model for Metal Oxide Aqueous Interface Based on Measurements of Surface Potential
Critical Evaluation of the Surface Complexation Model for Metal Oxide Aqueous Interface Based on Measurements of Surface Potential // 79th ACS Colloid and Surface Science Symposium, Book of abstracts / - (ur.).
Potsdam (NY): -, 2005. str. - (plenarno, međunarodna recenzija, sažetak, znanstveni)
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Naslov
Critical Evaluation of the Surface Complexation Model for Metal Oxide Aqueous Interface Based on Measurements of Surface Potential
Autori
Kallay, Nikola ; Preočanin, Tajana ; Čop, Ana
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
79th ACS Colloid and Surface Science Symposium, Book of abstracts
/ - Potsdam (NY), 2005
Skup
79th ACS Colloid and Surface Science Symposium
Mjesto i datum
Potsdam (NY), Sjedinjene Američke Države, 06.2005
Vrsta sudjelovanja
Plenarno
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
metal oxide aqueous interface; surface complexation model; surface potential; metal oxide monocrystal electrode
Sažetak
Ionic equilibria at metal oxide aqueous interface is commonly interpreted on the basis of the Surface Complexation Model that takes into account mechanism of specific interfacial reactions, their equilibrium constants, and the structure of electrical interfacial layer. Several variations of the basic model were used for interpretation of experimental data. The common experimental techniques are acid base titrations of suspension providing surface charge density in the inner plane, counter ion adsorption measurements and electrokinetics. It was found that these experimental data may be successfully interpreted by several different variations of the model so that one needs to introduce a new experimental technique that might help in solving the problem. There were several attempts to measure surface potential at the inner plane by metal electrodes covered by layer of a metal oxide. However, due to the porosity of oxide layer the data were not reliable. Recently, we have constructed an electrode made of monocrystaline hematite enabling the reliable measurements. These data, together with other data obtained by classical methods, enables evaluation of all parameters characterizing the interface and critical test of the assumptions involved in the application of the Surface Complexation Model.
Izvorni jezik
Engleski
Znanstvena područja
Kemija
