A reinvestigation of the preparation of tungsten oxide hydrate WO3, 1/3H2O

J. Pfeifer, Cao Guifang, P. Tekula-Buxbaum, B. A. Kiss, M. Farkas-Jahnke, K. Vadasdi

Research output: Contribution to journalArticle

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Abstract

A reinvestigation of the synthesis procedures of WO3, 1/3H2O via the preparation and dehydration of H2WO4, H2O has been carried out in order to check the stoichiometry of WO3, 1/3H2O, the parent material of the important hexagonal WO3. The formation of WO3, 1/3H2O during dehydration reaction of H2WO4, H2O via the solution was observed to require the presence of sodium in the reaction system, resulting in sodium incorporation in the WO3, 1/3H2O phase. The minimal level of sodium in the WO3, 1/3H2O phase was found to be 160 ppm; sodium levels up to 1000-3000 ppm were also found to be incorporated in the WO3, 1/3H2O structures. A shift in the c parameter of the WO3, 1/3H2O cell has been found to be connected with the change in the concentration of incorporated sodium. The average size of the octagonal platelets of WO3, 1/3H2O was found to be connected with the sodium concentration in the solid phase. A modification in infrared absorption spectra has been observed.

Original languageEnglish
Pages (from-to)90-97
Number of pages8
JournalJournal of Solid State Chemistry
Volume119
Issue number1
DOIs
Publication statusPublished - 1995

Fingerprint

tungsten oxides
Hydrates
hydrates
Tungsten
Sodium
sodium
preparation
Oxides
Dehydration
dehydration
Infrared absorption
Platelets
platelets
Stoichiometry
infrared absorption
tungsten oxide
solid phases
Absorption spectra
stoichiometry
infrared spectra

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Ceramics and Composites
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Condensed Matter Physics

Cite this

Pfeifer, J., Guifang, C., Tekula-Buxbaum, P., Kiss, B. A., Farkas-Jahnke, M., & Vadasdi, K. (1995). A reinvestigation of the preparation of tungsten oxide hydrate WO3, 1/3H2O. Journal of Solid State Chemistry, 119(1), 90-97. https://doi.org/10.1016/0022-4596(95)80013-F

A reinvestigation of the preparation of tungsten oxide hydrate WO3, 1/3H2O. / Pfeifer, J.; Guifang, Cao; Tekula-Buxbaum, P.; Kiss, B. A.; Farkas-Jahnke, M.; Vadasdi, K.

In: Journal of Solid State Chemistry, Vol. 119, No. 1, 1995, p. 90-97.

Research output: Contribution to journalArticle

Pfeifer, J, Guifang, C, Tekula-Buxbaum, P, Kiss, BA, Farkas-Jahnke, M & Vadasdi, K 1995, 'A reinvestigation of the preparation of tungsten oxide hydrate WO3, 1/3H2O', Journal of Solid State Chemistry, vol. 119, no. 1, pp. 90-97. https://doi.org/10.1016/0022-4596(95)80013-F
Pfeifer, J. ; Guifang, Cao ; Tekula-Buxbaum, P. ; Kiss, B. A. ; Farkas-Jahnke, M. ; Vadasdi, K. / A reinvestigation of the preparation of tungsten oxide hydrate WO3, 1/3H2O. In: Journal of Solid State Chemistry. 1995 ; Vol. 119, No. 1. pp. 90-97.
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