Effect of Au Doped WO3 Gas Sensors for NO2 Detection

Wu Bin Gao; Cheng Dong; Xu Liu; Yun Han Ling; Jia Lin Sun

doi:10.4028/www.scientific.net/KEM.492.308

Paper Titles

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Low-Temperature Synthesis and Gas Sensing Properties of Anatase TiO₂ Thin Films
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Discharge Relaxation of TiO₂-WO₃ Composite Nanotube Arrays
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Effect of Au Doped WO₃ Gas Sensors for NO₂ Detection
p.308

Charactering and Sintering of BaZrO₃ Doped with TiO₂
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Fabrication and Photoelectrochemical Properties of CuO/TiO₂ Heterojunction Nanotubes Array Film
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Luminescence Properties of Eu²⁺ Doped β-SiAlON Phosphor
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Solvothermal Synthesis and Characterization of Two Iron Complexes
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 492Effect of Au Doped WO3 Gas Sensors for NO2...

Effect of Au Doped WO₃ Gas Sensors for NO₂ Detection

Abstract:

Gas sensor based on point contact tungsten trioxide (WO₃) was prepared by in-situ induction-heating thermal oxidation of tungsten filaments. X-ray diffractometry (XRD) and field emission scanning electron microscopy (FESEM) were employed to analyze the phase and the morphology of the fabricated thin films. The results showed that the WO₃ films exhibited a monoclinic phase and were composed of hierarchical micro and nano crystals. The NO₂ (1-8 ppm) sensing properties of the point contact sensors based on Pure and Au-sputtering doped (2.5 at%) WO₃ films were investigated. The results showed that the gas sensing properties of the Au (2.5 at%) doped WO₃ sensors were superior to those of the undoped. The obtained point contact WO₃ sensor exhibited the maximum NO₂ gas response at 100°C.

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Periodical:

Key Engineering Materials (Volume 492)

Pages:

308-311

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.492.308

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Online since:

September 2011

Authors:

Wu Bin Gao, Cheng Dong, Xu Liu, Yun Han Ling, Jia Lin Sun

Keywords:

Gold, Induction-Oxidation, NO₂ Sensor, Tungsten Trioxide

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