pH mediated delamination of anionic clay-like nickelzinc hydroxysalt in water through intercalation of zwitterionic p-aminobenzoate ions

Britto, Sylvia and Rajamathi, Jacqueline T and Ravishankar, N and Shivakumara, C and Rajamathi, Michael (2006) pH mediated delamination of anionic clay-like nickelzinc hydroxysalt in water through intercalation of zwitterionic p-aminobenzoate ions. In: Solid State Sciences, 8 (2). pp. 162-167.

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Abstract

p-aminobenzoate could be intercalated into the anionic clay, Ni3Zn2(OH)(8)(OAc)(2)center dot 2H(2)O at a high pH (similar to 10). When the pH was reduced to similar to 7 while washing colloidal dispersion due to delamination was observed. The development of partial positive charge on the amine end of the intercalated anion causes repulsion between the layers leading to delamination and colloidal dispersion of monolayers in water. The layers could be restacked from the colloid to form the parent solid either by increasing the pH or by evaporation.

Item Type:	Journal Article
Publication:	Solid State Sciences
Publisher:	Elsavier
Additional Information:	Copyright of this article belongs to Elsavier.
Keywords:	Anionic clay;Hydroxysalt;Colloids;Delamination;Restacking.
Department/Centre:	Division of Chemical Sciences > Materials Research Centre Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	06 Apr 2009 07:11
Last Modified:	19 Sep 2010 04:58
URI:	http://eprints.iisc.ac.in/id/eprint/17755

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