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IDE embedded tungsten trioxide gas sensor for sensitive NO2 detection

In this work, a tungsten trioxide (WO3) based sensitive gas sensor is developed and described. The WO3 material is synthesized using sol-gel method and deposited over fabricated interdigitated electrodes (IDE) by drop casting method. The morphology, surface composition and structural properties of t...

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Bibliographic Details
Published in:Materials chemistry and physics 2019-02, Vol.224, p.257-263
Main Authors: Kamble, Chetan, Panse, Meena
Format: Article
Language:English
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Summary:In this work, a tungsten trioxide (WO3) based sensitive gas sensor is developed and described. The WO3 material is synthesized using sol-gel method and deposited over fabricated interdigitated electrodes (IDE) by drop casting method. The morphology, surface composition and structural properties of the deposited WO3 film were investigated. The XRD and SAED show the monoclinic structure of WO3. The sensor shows highly selective nature towards nitrogen dioxide (NO2) in the presence of different interfering gases like SO2, NH3, Cl2, CH3OH and C3H6O. The NO2 gas responses for the 5–100 ppm concentrations were investigated at an optimum operating temperature of 200 °C. The sensor has an excellent reproducible gas response and supreme stability. •WO3 deposited over interdigitated electrode sensor for sensitive NO2 sensing.•WO3 sensor exhibited the highest response of 20.36 for 100 ppm NO2.•WO3 sensor showed an excellent response-recovery time.•WO3 sensor showed a lower detection limit of 5 ppm NO2 gas at 200 °C.
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2018.12.015