Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 10, Issue 12, Pages 2805-2810Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b005559j
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New layered vanadium oxides were prepared at room temperature via either electrochemical or chemical topotactic oxidation in aqueous media of the layered, solid precursor H2V3O8. Their formula MyH1 - yV3O8. nH(2)O (M = Li, Na, K) shows the oxidation of vanadium to occur with the removal of one hydrogen atom and with a partial exchange of the remaining proton. A structural study by powder X-ray diffraction, including a Rietveld analysis, clearly indicated that the structure of the anionic covalent layers, V3O8, are preserved in going from H2V3O8 to MyH1 - yV3O8. nH(2)O. In the latter compounds, all the water molecules occupy the interlayer space along with the M+ ions.
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