Change search
ReferencesLink to record
Permanent link

Direct link
A study of the SiO2-aqueous electrolyte (NaCl, CsCl) interface by X-ray photoelectron spectroscopy
Umeå University, Faculty of Science and Technology, Chemistry.
2007 (English)In: Colloid Journal, ISSN 1061-933X (Print) 1608-3067 (Online), Vol. 69, no 4, 514-25 p.Article in journal (Refereed) Published
Abstract [en]

The surface of amorphous silicon dioxide in NaCl and CsCl solutions with various values of ionic strength and pH is studied by X-ray photoelectron spectroscopy. Samples are prepared through the fast freezing of wet pastes prepared by the centrifugation of suspensions. It is shown that the X-ray photoelectron spectra of such samples provide experimental information on the composition of the SiO2-solution interface, the number of electrolyte ions near the solid phase surface, and its chemical modification. The sign of the charge of silicon dioxide particles can be judged from the dependence of a measured Na(Cs)/Cl atomic ratio; the controlled removal of water from the samples in the chamber of an electronic spectrometer makes it possible to directly estimate the surface potential and study the energy effects of counterion hydration using the shifts in the binding energies of the corresponding photoelectron levels. An analysis of the binding energies of Cs 3d5/2 and Cl 2p3/2 lines in the X-ray photoelectron spectra for the SiO2-CsCl solution interface yields additional information on the structure of the formed electrical double layer, thus making it possible to distinguish between the ions adsorbed at the surface and the counterions compensating for its charge.

Place, publisher, year, edition, pages
2007. Vol. 69, no 4, 514-25 p.
URN: urn:nbn:se:umu:diva-17102DOI: doi:10.1134/S1061933X0704014XOAI: diva2:156775
Original Russian Text © A.V. Shchukarev, 2007, published in Kolloidnyi Zhurnal, 2007, Vol. 69, No. 4, pp. 550–562.Available from: 2007-10-31 Created: 2007-10-31 Last updated: 2011-01-11Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Shchukarev, Andrey
By organisation

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 26 hits
ReferencesLink to record
Permanent link

Direct link