Exfoliation of α-hydroxides of nickel and cobalt in water

被引：35

作者：

Nethravathi, C. ^{[1
]}

Viswanath, B. ^{[2
]}

Sebastian, Mency ^{[1
]}

Rajamathi, Michael ^{[1
]}

机构：

[1] St Josephs Coll, Dept Chem, Mat Res Grp, Bangalore 560027, Karnataka, India

[2] Indian Inst Sci, Mat Res Ctr, Bangalore 560012, Karnataka, India

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2010年 / 345卷 / 01期

关键词：

alpha-Hydroxides of nickel/cobalt; Intercalation; Exfoliation; LAYERED DOUBLE HYDROXIDES; POSITIVELY CHARGED NANOSHEETS; GRAPHITE OXIDE; SOLVOTHERMAL DECOMPOSITION; COLLOIDAL DISPERSIONS; DODECYL-SULFATE; ANIONIC CLAY; THIN-FILMS; DELAMINATION; BEHAVIOR;

D O I：

10.1016/j.jcis.2010.01.047

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：

p-Aminobenzoate ion intercalated alpha-hydroxides of nickel/cobalt were synthesized by precipitation using ammonia (pH = similar to 12). Aqueous colloidal suspension of alpha-hydroxide of nickel/cobalt was obtained on washing the precipitate as the pH was reduced to similar to 7. The development of partial positive charge on the amine end of the intercalated anion causes repulsion between the layers leading to exfoliation and colloidal suspension of monolayers in water. While the layers could be restacked from the colloidal suspension in the presence of other anions in the case of alpha-cobalt hydroxide, the exfoliation could not be reversed easily in the case of the nickel analog. (C) 2010 Elsevier Inc. All rights reserved.

引用

页码：109 / 115

页数：7

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