Controlling the composition of nanosize hexagonal WO3 for gas sensing

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13 Citations (Scopus)

Abstract

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
Volume589
DOIs
Publication statusPublished - 2008

Fingerprint

Tungsten
tungsten
Gases
Bronze
bronzes
Ammonium Compounds
Chemical analysis
gases
Heating
heating
Chemical sensors
adjusting
Nanoparticles
atmospheres
Atoms
Oxidation
nanoparticles
oxidation
sensitivity
sensors

Keywords

  • H-MAS NMR
  • Composition
  • Gas sensor
  • Hexagonal tungsten oxide
  • Raman
  • SEM
  • XPS
  • XRD

ASJC Scopus subject areas

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

Cite this

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title = "Controlling the composition of nanosize hexagonal WO3 for gas sensing",
abstract = "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.",
keywords = "H-MAS NMR, Composition, Gas sensor, Hexagonal tungsten oxide, Raman, SEM, XPS, XRD",
author = "Szil{\'a}gyi, {Imre Mikl{\'o}s} and Sami Saukko and J. Mizsei and P. Kir{\'a}ly and G. T{\'a}rk{\'a}nyi and A. T{\'o}th and A. Szab{\'o} and K. Josepovits and J. Madar{\'a}sz and G. Pokol",
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language = "English",
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T1 - Controlling the composition of nanosize hexagonal WO3 for gas sensing

AU - Szilágyi, Imre Miklós

AU - Saukko, Sami

AU - Mizsei, J.

AU - Király, P.

AU - Tárkányi, G.

AU - Tóth, A.

AU - Szabó, A.

AU - Josepovits, K.

AU - Madarász, J.

AU - Pokol, G.

PY - 2008

Y1 - 2008

N2 - 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.

AB - 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.

KW - H-MAS NMR

KW - Composition

KW - Gas sensor

KW - Hexagonal tungsten oxide

KW - Raman

KW - SEM

KW - XPS

KW - XRD

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