Influence of the background electrolyte on the point of zero charge of chromium(III)-oxide

被引：0

作者：

Onjia, AE ^{[1
]}

Milonjic, SK ^{[1
]}

机构：

[1] Vinca Inst Nucl Sci, Belgrade, Yugoslavia

来源：

CONTEMPORARY STUDIES IN ADVANCED MATERIALS AND PROCESSES: YUCOMAT IV | 2003年 / 413卷

关键词：

background electrolytes; batch equilibration; chromium(III)-oxide; Point of zero charge;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The Point of zero charge of chromium(Ill)-oxide (pH(pzc)) was investigated by a batch equilibration method. The effect of several background electrolytes, in the concentration range of 10(-5)-10(-1) mol/dm(3), on pH(pzc) was established. In the absence of ionic species with specific affinity toward chromium(III)-oxide surface, the pH(pzc) for this material occurs at pH=6.7. KCl was found to behave as an indifferent electrolyte in the studied range of concentrations. A negligible increase in pH(pzc) due to the sorption of [Fe(CN)(6)](3-) ions was observed when K-3[Fe(CN)(6)] was used as an electrolyte. The presence of oxygen bearing electrolytes (KNO3, NaNO3, and K2SO4) shifts the pH(pzc) toward lower values. In the case of highly hydrolyzable cation Cd2+, the pH(pzc) decreases even more and the buffering effect of chromium(Ill)-oxide is changed.

引用

页码：87 / 91

页数：5

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