Controlling the composition of nanosize hexagonal WO3 for gas sensing

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Hexagonal (h-) WO3 was prepared through heating hexagonal ammonium tungsten bronze (HATB), (NH4)0.07(NH 3)0.04(H2O)0.09WO2.95. By adjusting the heating temperature and atmosphere of HATB, we could control the oxidation state of tungsten atoms and the residual NH3/NH 4+ content in h-WO3. The as-produced h-WO 3 nanoparticles with different composition were tested as gas sensors and the effect of composition on gas sensing properties was studied. Our results showed that oxidized h-WO3 had the best sensitivity to H 2S.

Original languageEnglish
Pages (from-to)161-166
Number of pages6
JournalMaterials Science Forum
Publication statusPublished - Dec 1 2008
Event6th Hungarian Conference on Materials Science - Siofok, Hungary
Duration: Oct 14 2007Oct 16 2007



  • Composition
  • Gas sensor
  • Hexagonal tungsten oxide
  • Raman
  • SEM
  • XPS
  • XRD

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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