Preparation of Tungsten Oxide Nanoplate Thin Film and its Gas Sensing Properties

Qiu Lan Chen; Xi Lai; Meng Long Yan; Guan Rong Tang; Jian Yi Luo; Jian Chen; Wei Guang Xie

doi:10.4028/www.scientific.net/AMR.774-776.687

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 774-776Preparation of Tungsten Oxide Nanoplate Thin Film...

Preparation of Tungsten Oxide Nanoplate Thin Film and its Gas Sensing Properties

Abstract:

Tungsten oxide is a kind of multifunctional materials with excellent properties for gas sensing, electrochromic and photocatalytic applications. In this study, Tungsten oxide nanoplate thin film was prepared by hydrothermal methods. The as-prepared thin film is composed of tungsten trioxide hydrate nanoplates, which are randomly orientate on the surface. The as-grown nanoplate thin film shows good sensitivity to H₂ gas. Dehydration and phase transition to γ-phase tungsten trioxide were found after annealing, and the sensitivity as well as the response time to H₂ were improved. We found that the nanoplate in the annealing sample bursts, which raises the surface-to-volume ratio for better hydrogen diffusion and reaction. The sensing mechanism was discussed. The findings provide a way to control the structure and surface morphology for improving the H₂ sensing properties of tungsten oxide.

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Periodical:

Advanced Materials Research (Volumes 774-776)

Pages:

687-690

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.774-776.687

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Online since:

September 2013

Authors:

Qiu Lan Chen, Xi Lai, Meng Long Yan, Guan Rong Tang, Jian Yi Luo, Jian Chen, Wei Guang Xie

Keywords:

Gas Sensing, Nanoplate, Tungsten Oxide

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