Synthesis and sensing properties to NH3 of hexagonal WO 3 metastable nanopowders

Lisheng Wang, J. Pfeifer, C. Balázsi, P. I. Gouma

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

WO3 is an important kind of wide-bandgap semiconducting metal oxides, which has a very promising property in gas-detection behavior. It has several polymorphs with triclinic, monoclinic, orthorhombic structures being the stable forms of this oxide. However, by a method known as acid precipitation, new metastable open crystalline forms with hexagonal structure have been successfully synthesized. The nanopowders were characterized by SEM, TEM, and XRD, and their sensing response to reducing gases (NH3) was measured and compared to monoclinic WO3, showing a much better sensing property of the hexagonal WO3.

Original languageEnglish
Pages (from-to)773-776
Number of pages4
JournalMaterials and Manufacturing Processes
Volume22
Issue number6
DOIs
Publication statusPublished - Aug 2007

Fingerprint

Oxides
Gases
Polymorphism
Energy gap
Metals
Crystalline materials
Transmission electron microscopy
Scanning electron microscopy
Acids

Keywords

  • Acid precipitation
  • Ammonia
  • Hexagonal
  • Metastable
  • Monoclinic
  • Nanopowder
  • Open structure
  • SEM
  • Sensitivity
  • Sensor
  • Synthesis
  • TEM
  • Thin film
  • Tungsten oxide
  • XRD

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Materials Science(all)

Cite this

Synthesis and sensing properties to NH3 of hexagonal WO 3 metastable nanopowders. / Wang, Lisheng; Pfeifer, J.; Balázsi, C.; Gouma, P. I.

In: Materials and Manufacturing Processes, Vol. 22, No. 6, 08.2007, p. 773-776.

Research output: Contribution to journalArticle

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