Self-stabilization of green rust (II) as a precursor of acicular goethite particles with highest possible aspect ratio

被引：16

作者：

Kurokawa, H

Senna, M

机构：

[1] Toda Kogyo Corp, Onoda R&D Ctr, Onoda 7560847, Japan

[2] Keio Univ, Fac Sci & Technol, Yokohama, Kanagawa 2230061, Japan

来源：

POWDER TECHNOLOGY | 1999年 / 103卷 / 02期

关键词：

geothite; green rust (II); particle morphology; oxidation; self-stabilization;

D O I：

10.1016/S0032-5910(98)00194-6

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Acicular goethite particles were obtained by oxidation of weakly alkaline solutions containing varying amount of ferrous hydroxide. The change in pH during oxidation was analyzed in detail with special emphasis on the behavior of green rust (II), the metastable intermediate. Green rust (II) was stabilized by the buffering function of Fe2+ in the solution. Coexistence of green rust (II) with goethite enables steady growth of goethite preferentially in the axial direction, resulting in an increase in the aspect ratio. (C) 1999 Elsevier Science S.A. All rights reserved.

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收藏

页码：71 / 79

页数：9

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