Ultrasensitive H2S Gas Sensor Based on SnO2 Nanoparticles Modified WO3 Nanocubes Heterojunction

This work presents an excellent H2S gas sensor based on tungsten oxide and tin dioxide (WO3/SnO2) nanocomposites. WO3 nanocubes and SnO2 nanoparticle materials were synthesized by hydrothermal method, and composite and single material sensors were prepared based on these two materials. The sensing p...

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Veröffentlicht in:IEEE sensors journal 2023-11, Vol.23 (22), p.27031-27037
Hauptverfasser: Xia, Hao, Zhang, Dongzhi, Sun, Yuehang, Wang, Jianghao, Tang, Mingcong
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Sprache:eng
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Zusammenfassung:This work presents an excellent H2S gas sensor based on tungsten oxide and tin dioxide (WO3/SnO2) nanocomposites. WO3 nanocubes and SnO2 nanoparticle materials were synthesized by hydrothermal method, and composite and single material sensors were prepared based on these two materials. The sensing performance of WO3/SnO2 composite nanomaterials to H2S gas was studied systematically. First, it is determined that the optimum working temperature of the composite material sensor is 200 °C, and the optimum mass ratio of WO3 and SnO2 is 1:1. The response and recovery time of the composite sensor to 2-ppm H2S gas are 25 and 41 s, respectively, and the response value is as high as 55.24%. The sensor has excellent repeatability and long-term stability. The sensor has specific selectivity for H2S gas. In addition, a H2S gas detection circuit is constructed to realize the real-time display of gas concentration and the alarm of exceeding the limit.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2023.3321726