Synthesis and structural properties of stoichiometric and oxygen deficient CuV2O6 prepared via co-precipitation method

Y. J. Wei, Kyung Wan Nam, G. Chen, Chang Wan Ryu, Kwang Bum Kim

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29 Citations (Scopus)

Abstract

Copper vanadates were synthesized using co-precipitation method. Scanning electron microscopy showed that the crystallinity of the materials increased with heat treatment temperature. X-ray diffraction study showed the material heat treated at 600 °C was stoichiometric triclinic α-CuV 2O6, whereas the material heat treated at 400 °C was an oxygen deficient counterpart of α-CuV2O5, which was CuV2O5.88 obtained from the thermogravimetric data. X-ray absorption near edge spectroscopy confirmed a valence state of +5 for V in α-CuV2O6, whereas a valence state lower than +5 in CuV2O5.88. The symmetrical degree of the [VO6] octahedron in α-CuV2O6 is higher than that of orthorhombic V2O5 and oxygen deficiency CuV 2O5.88. The Raman band of the V-O1 stretching vibration showed a red shift for copper vanadates with respect to orthorhombic V2O5 because of the electrostatic attraction between Cu and O1 atoms. Moreover, the V4+-O1 stretching vibration was observed for oxygen deficient CuV2O5.88.

Original languageEnglish
Pages (from-to)2243-2249
Number of pages7
JournalSolid State Ionics
Volume176
Issue number29-30
DOIs
Publication statusPublished - 2005 Sep

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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