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Soft-chemical routes to synthesis of solid oxide materials

Gopalakrishnan, J and Uma, S and Rangan, Kasthuri K and Bhuvanesh, NSP (1994) Soft-chemical routes to synthesis of solid oxide materials. In: Proceedings of the Indian Academy of Sciences - Chemical Sciences, 106 (3). pp. 609-619.

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Abstract

We describe three different families of metal oxides, viz., (i) protonated layered perovskites, (ii) framework phosphates of NASICON and KTiOPO4 (KTP) structures and (iii) layered and three-dimensional oxides in the H-V-W-O system, synthesized by 'soft-chemical' routes involving respectively ion-exchange, redox deinteracalation and acid-leaching from appropriate parent oxides. Oxides of the first family, HyA2B3O10(A = La/Ca; B = Ti/Nb), exhibit variable Bronsted acidity and intercalation behaviour that depend on the interlayer structure. V2(PO4)3 prepared by oxidative deintercalation from Na3V2(PO4)3 is a new host material exhibiting reductive insertion of lithium/hydrogen, while K0.5Nb0.5 M0.5OPO4(M = Ti, V) are novel KTP-like materials exhibiting second harmonic generation of 1064 nm radiation. HxVxW1-xO3 for x = 0.125 and 0.33 possessing alpha-MoO3 and hexagonal WO3 structures, prepared by acid-leaching of LiVWO6, represent functionalized oxide materials exhibiting redox and acid-base intercalation reactivity.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Indian academy of sciences.
Keywords: Synthesis of oxide materials;ion-exchange;intercalation/ deintercalation;acid-leaching.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 13 Apr 2011 10:57
Last Modified: 13 Apr 2011 10:57
URI: http://eprints.iisc.ernet.in/id/eprint/36805

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