Controlling the Composition of Nanosize Hexagonal WO3 for Gas Sensing

Abstract:

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Hexagonal (h-) WO3 was prepared through heating hexagonal ammonium tungsten bronze (HATB), (NH4)0.07(NH3)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/NH4 + content in h-WO3. The as-produced h-WO3 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 H2S.

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Periodical:

Edited by:

P.J. Szabó, T. Réti, T. Czigány

Pages:

161-166

DOI:

10.4028/www.scientific.net/MSF.589.161

Citation:

I. M. Szilágyi et al., "Controlling the Composition of Nanosize Hexagonal WO3 for Gas Sensing", Materials Science Forum, Vol. 589, pp. 161-166, 2008

Online since:

June 2008

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Price:

$35.00

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