Structure and reactivity of colloidal metal oxide particles immersed in water

被引：26

作者：

Blesa, MA

Magaz, G

Salfity, JA

Weisz, AD

机构：

[1] Comis Nacl Energia Atom, Unidad Actividad Quim, RA-1429 Buenos Aires, DF, Argentina

[2] Univ Buenos Aires, Fac Ciencias Exactas & Nat, INQUIMAE, RA-1405 Buenos Aires, DF, Argentina

来源：

SOLID STATE IONICS | 1997年 / 101卷

关键词：

metal oxides; particles; aqueous suspensions; surface acidity; leached layer;

D O I：

10.1016/S0167-2738(97)00414-1

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 acidity of Cr(III) and Fe(III) (hydr)oxides in water was studied. The experimental point-of zero-charge condition of the particles differs from that of the solution due to solvation effects on ionic adsorption; the surface charge is attributed to polymeric surface complexes. A simple model for the acidity of solid solutions MxRl-xO is presented and contrasted with the complex behavior of ilmenite, which is influenced by the kinetics of FeO leaching and the acid-base properties of the leached layer.

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收藏

页码：1235 / 1241

页数：7

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