Investigation of acid-base and sorption properties of surface of metal-ceramic composites L. N. Skvortsova, L. N. Chukhlomina, T. S. Minakova, M. V. Sherstoboeva
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ArticleSubject(s): металлокерамические композиты | Льюиса основания | кислотно-основные свойстваGenre/Form: статьи в журналах Online resources: Click here to access online
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Russian journal of applied chemistry Vol. 90, № 8. P. 1246-1251Abstract: The acid-base properties of the surface of composites based on boron, silicon, and sialon nitrides were investigated by the indicator method of Hammett and Tanabe with spectrophotometric indication. Identification of the surface sites of the composites under study was carried out. On the surface of composites based on boron and sialon nitrides the Lewis base sites dominate, while on the surface of samples based on silicon nitride the Brønsted acid sites. Sorption of dyes and oxalic acid by cermet materials was studied. It is shown that the adsorption activity depends on the nature and amount of surface active sites of the composites.
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The acid-base properties of the surface of composites based on boron, silicon, and sialon nitrides were investigated by the indicator method of Hammett and Tanabe with spectrophotometric indication. Identification of the surface sites of the composites under study was carried out. On the surface of composites based on boron and sialon nitrides the Lewis base sites dominate, while on the surface of samples based on silicon nitride the Brønsted acid sites. Sorption of dyes and oxalic acid by cermet materials was studied. It is shown that the adsorption activity depends on the nature and amount of surface active sites of the composites.
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