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Microwave-assisted selective deoxygenation of layer- and chain-containing oxides

Vaidhyanathan, Balasubramanium and Ganguli, Munia and Rao, Kalya J (1996) Microwave-assisted selective deoxygenation of layer- and chain-containing oxides. In: Journal of Materials Chemistry, 6 (3). pp. 391-394.

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Very rapid (within 5 min), selective, single-step deoxygenation of layer- and chain-containing oxides, MoO3, CrO3, V2O5, alpha-VOPO4 . 2H(2)O and Ag6Mo10O33 has been accomplished using graphitic carbon in a microwave-assisted reaction. The products were found to be MoO2, Cr2O3, VO2, VPO4 and a mixture of (Ag + MoO2), respectively. Products were characterised by X-ray diffraction (XRD), differential scanning calorimetry (DSC), IR and electron paramagnetic resonance (EPR) spectroscopies. Although conventional methods of preparing these materials are tedious, the present method is simple, fast and yields very homogeneous products of good crystallinity. Our results reveal that while layer- and chain-containing oxides undergo rapid microwave-assisted carbothermal reduction, the non-layered materials do not. The high structural selectivity of these reactions is suggestive of the topochemical nature of the fast reduction process.

Item Type: Journal Article
Publication: Journal of Materials Chemistry
Publisher: Royal society of chemistry
Additional Information: Copyright of this article belongs to Royal society of chemistry.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 03 May 2011 06:07
Last Modified: 03 May 2011 06:07
URI: http://eprints.iisc.ac.in/id/eprint/37366

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