INTERFACIAL ELECTRON-TRANSFER IN COLLOIDAL SPINEL IRON-OXIDE SILVER ION REDUCTION IN AQUEOUS-MEDIUM

被引：26

作者：

JOLIVET, JP

TRONC, E

BARBE, C

LIVAGE, J

机构：

[1] Chimie de la Mutiére Condensée, CNRS UA 302, Université Pierre et Marie Curie, 75252 Paris Cedex 05, T.54 E.5

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 1990年 / 138卷 / 02期

关键词：

D O I：

10.1016/0021-9797(90)90228-G

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 redox behavior of spinel iron oxide colloids has been evidenced by studying silver reduction by magnetic using potentiometry, X-ray diffraction and Mösshauer spectroscopy. At pH ≥6, silver reduction involves an interfacial electron transfer without iron desorption, and the Fe3O4 → γ-Fe2O3 transformation. In reverse, the γ-Fe2O3 colloid can be refilled with electrons by FeII adsorption, which results in the growth of a Fe3o4 surface layer. This reduced colloid is much more reactive than the intial Fe3O4 particle. © 1990.

引用

页码：465 / 472

页数：8

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