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Hydrothermal Synthesis of Vanadium Oxides

Published online by Cambridge University Press:  15 February 2011

Thomas Chirayil ,
Peter Zavalij  and
M. Stanley Whittingham
Thomas Chirayil
Affiliation:
Chemistry Department and Materials Research Center, State University of New York at Binghamton, Binghamton, NY 13902–6000, USA
Peter Zavalij
Affiliation:
Chemistry Department and Materials Research Center, State University of New York at Binghamton, Binghamton, NY 13902–6000, USA
M. Stanley Whittingham
Affiliation:
Chemistry Department and Materials Research Center, State University of New York at Binghamton, Binghamton, NY 13902–6000, USA
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Abstract

The pH of the reaction media is a critical factor in the formation of new vanadium oxides with the tetramethylammonium (TMA) ion via the conventional hydrothermal method. New vanadium oxides; TMAV3O7, Li0.6V2−δO4−δ·H2O and Li0.6V2−δO4−δ, TMAV4O10, and two more new vanadium phases with d spacings of 11.5Å and 19.1Å are formed as the pH is varied with acetic acid. The synthesis and characterization of TMAV3O7, a new vanadium oxide with tetramethylammonium ions residing between its layers is discussed. The intercalation of alkylamines, DMSO, and water into Li0.6V2−δO4−δ·H2O is described. Microwave hydrothermal synthesis is a new and alternate soft chemistry technique used to accelerate the synthesis of TMAV4O10. This method also aided in the formation of a new cluster compound, [Li(H2O)4]2TMA(V10O28)·4H2O.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 453: Symposium R – Solid State Chemistry of Inorganic Materials , 1996 , 135
Copyright
Copyright © Materials Research Society 1997

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References

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