Ultra-Sensitive H₂S Gas Sensor Based on WO₃ Nanocubes with Low Operating Temperature

Abstract:

WO₃ nanostructure with nanocube morphology was synthesized through acidification of Na₂WO₄·2H₂O, which were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Moreover, the result of the present work implied that the sensor fabricated by nanocube WO₃ could detect the level of 330 ppb H₂S, which is much lower than the threshold limit value of 10 ppm. Compared with other results, the nanocube WO₃ sensor shows higher sensitivity, excellent selectivity and faster response/recovery to H₂S. Especially, the best operating temperature of this nanocube WO₃ for H₂S detection is 100 °C.

• Periodical: Materials Science Forum (Volume 939)
• Pages: 133-140
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.939.133
• Online since: November 2018
• Authors: Zhan Hong Li, Ji Xie, Xiao Bing Hu, Cheng Chen, Li Li Xie, Zhi Gang Zhu*, Liao Ying Zheng
• Keywords: Gas Sensor, H₂S, Nanomaterials, WO₃

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