The role of ζ potential in the colloidal stability of different TiO2/electrolyte solution interfaces

被引：47

作者：

Fernández-Nieves, A ^{[1
]}

Nieves, FJD ^{[1
]}

机构：

[1] Univ Almeria, Fac Sci, Dept Appl Phys, Grp Complex Fluids Phys, Almeria 04120, Spain

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 1999年 / 148卷 / 03期

关键词：

titanium dioxide; zeta potential; colloidal stability;

D O I：

10.1016/S0927-7757(98)00763-8

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The present paper deals with the electrokinetic characterization and colloidal stability of different TiO2/water interfaces under the presence of several electrolytes. The electrophoretic mobility of the TiO2 particles was measured versus NaCl, NaNO3, Na2SO4 and CaCl2 concentrations, at pHs 4, 5.5 and 10.5. zeta Potential calculations have been carried out with the aid of O'Brien and Whites' conversion theory. The medium pH and the valence of the ions have proven to be of gnat influence in our suspension electrokinetic behaviour. The colloidal stability has been studied by means of the filers and Korff index. The different flocculant character of the ionic species has been established, which is of great importance in the solar photocatalytic process where our titanium dioxide is employed. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：231 / 243

页数：13

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