Exfoliation of alpha-hydroxides of nickel and cobalt in water

Nethravathi, C and Viswanath, B and Sebastian, Mency and Rajamathi, Michael (2010) Exfoliation of alpha-hydroxides of nickel and cobalt in water. In: Journal of Colloid and Interface Science, 345 (1). pp. 109-115.

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Abstract

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 theb layers could be restacked from the colloidal suspension in the presenceof 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.

Item Type:	Journal Article
Publication:	Journal of Colloid and Interface Science
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	alpha-Hydroxides of nickel/cobalt; Intercalation; Exfoliation
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	11 Jun 2010 06:56
Last Modified:	19 Sep 2010 05:59
URI:	http://eprints.iisc.ac.in/id/eprint/27002

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