Effect of complexation on the zeta potential of titanium dioxide dispersions

被引：28
|
作者：
Xu, GL [1 ]
Zhang, JJ
Li, GZ
Song, GZ
机构：
[1] Chinese Acad Sci, Grad Sch, Tech Inst Phys & Chem, Beijing 100101, Peoples R China
[2] Shandong Univ, Key Lab Colloid & Interface Chem Educ Minist, Jinan 250100, Peoples R China
来源：
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY | 2003年 / 24卷 / 3-4期
关键词：
titanium dioxide; zeta potential; electrolyte; complexation; suspension;
D O I：
10.1081/DIS-120021807
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 surface charge properties and the dispersion stability of an aqueous titania suspension. Generally the titania powder surface is negatively charged. The dispersion stability of TiO2 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 TiO2 suspension.
引用
收藏
页码：527 / 535
页数：9
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