Changes in the acid-base properties of hydrogels of metal oxide hydroxides induced by aging in solutions of electrolytes

被引：0
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作者：
S. I. Pechenyuk
S. I. Matveenko
机构：
[1] Kola Research Center of the Russian Academy of Sciences,Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials
来源：
Russian Chemical Bulletin | 2000年 / 49卷
关键词：
acid-base properties; oxide hydroxide; hydrogel; aging (of hydrogel); zero point of charge;
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摘要：
Changes in the acid-base properties of titanium(IV), zirconium(IV), iron(III), chromium(III), and indium(III) hydrogels of oxide hydroxides induced by aging in sodium chloride and sulfate solutions were studied by the point of zero charge method. On aging in a solution of the sulfate electrolyte the hydrogels loose their basic properties much more rapidly than in the chloride solution. The most changes were observed in the region of high pH of the point of zero charge of the hydrogels. The changes in the acid-base properties can be explained by a decrease in the content of surface OH groups with are displaced by the supporting electrolyte ions, and due to the oxolation of the hydrogels.
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页码：1323 / 1326
页数：3
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