Molybdenum–vanadium mixed oxides synthesized by the hydrothermal method

The effect of pressure (5–20 MPa) on the process of hydrothermal synthesis of a molybdenum–vanadium mixed oxide from a molybdenum–vanadium mixed poly(oxyacid) is studied. It is shown that the synthesis product is a solid solution of isomorphically substituted vanadium pentoxide with a pressure-indep...

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Bibliographic Details
Published in:Russian journal of physical chemistry. B 2015-09, Vol.9 (5), p.721-725
Main Authors: Baraboshina, A. A., Sviridova, T. V., Kokorin, A. I., Degtyarev, E. N., Romashevskaya, E. I., Sviridov, D. V.
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Dynamics of Phase Processes
Physical Chemistry
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Summary:The effect of pressure (5–20 MPa) on the process of hydrothermal synthesis of a molybdenum–vanadium mixed oxide from a molybdenum–vanadium mixed poly(oxyacid) is studied. It is shown that the synthesis product is a solid solution of isomorphically substituted vanadium pentoxide with a pressure-independent composition. With increasing pressure, the degree of crystallinity of the synthesized products increases, concentration of isolated V(IV) ions decreases, habitus of the crystals changes from prismatic to needlelike, and overall dispersity increases. This makes it possible to regard the pressure as a dispersing factor for the synthesis of nanostructured molybdenum–vanadium oxides.
ISSN:1990-7931
1990-7923
DOI:10.1134/S1990793115050036