Effect of Complexation on the Zeta Potential of Titanium Dioxide Dispersions

The present paper deals with the surface charge properties and the dispersion stability of an aqueous titania suspension. Generally the titania powder surface is negatively charged. The dispersion stability of TiO 2 suspension is governed by the value of zeta potential. The zeta potential was measur...

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Published in:Journal of dispersion science and technology 2003-01, Vol.24 (3-4), p.527-535
Main Authors: Xu, Guanli, Zhang, Jingjie, Li, Ganzuo, Song, Guangzhi
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
Complexation
Electrolyte
Exact sciences and technology
General and physical chemistry
Physical and chemical studies. Granulometry. Electrokinetic phenomena
Suspension
Titanium dioxide
Zeta potential
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description The present paper deals with the surface charge properties and the dispersion stability of an aqueous titania suspension. Generally the titania powder surface is negatively charged. The dispersion stability of TiO 2 suspension is governed by the value of zeta potential. The zeta potential was measured as a function of barium acetate and zinc acetate concentrations, at pH 6.0, and the addition of electrolytes caused sharp decrease of surface charge. Ethylenediaminetetraacetic acid (EDTA) was used to chelate the bivalent metal ions, so that the charge of counterions was reduced. The complexation of bivalent counterions favors the increase of the negative zeta potential and the dispersion stability of aqueous TiO 2 suspension.
doi_str_mv 10.1081/DIS-120021807
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subjects Chemistry
Colloidal state and disperse state
Complexation
Electrolyte
Exact sciences and technology
General and physical chemistry
Physical and chemical studies. Granulometry. Electrokinetic phenomena
Suspension
Titanium dioxide
Zeta potential
title Effect of Complexation on the Zeta Potential of Titanium Dioxide Dispersions
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