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<p>Hydrogen Sulfide (H<sub>2</sub>S) gas can cause physiological discomfort at low concentrations and is lethal at high concentrations. It is one of the major pollutants in the petrochemical industry. In this article, carbon-modified WO<sub>3</sub> nanoparticle gas-sensitive sensing materials were synthesized using the hydrothermal method, and high-performance H<sub>2</sub>S gas-sensitive sensing devices were fabricated. At a doping ratio of 2:3, the optimal working temperature for the carbon-modified WO<sub>3</sub> (C-WO<sub>3</sub>) nanoparticles is 160 °C. It exhibits a response value of 23.7&#xa0;for&#xa0;10&#xa0;ppm of H<sub>2</sub>S gas, with a response and recovery time of 6&#xa0;s/64&#xa0;s. The material demonstrates excellent selectivity, repeatability, and long-term stability for detecting H<sub>2</sub>S gas. These outstanding performance characteristics make it a promising candidate for H<sub>2</sub>S gas detection applications. This modification enhances the material’s gas-sensing performance and its resistance to interference. Finally, first-principles calculations revealed the&#xa0;mechanism behind the improvement in the H<sub>2</sub>S gas-sensing performance of carbon-modified WO<sub>3</sub> sensing materials.</p>

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Enhanced H2S sensing performance of carbon-modified WO3 nanocomposite based sensor: experiments and DFT calculation

  • 期刊论文

  • 发表日期：

    2026年7月29日

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  • Yong Zhang,
  • Gongao Jiao,
  • Zuozhe Ding,
  • Dongzhi Zhang

摘要

Hydrogen Sulfide (H2S) gas can cause physiological discomfort at low concentrations and is lethal at high concentrations. It is one of the major pollutants in the petrochemical industry. In this article, carbon-modified WO3 nanoparticle gas-sensitive sensing materials were synthesized using the hydrothermal method, and high-performance H2S gas-sensitive sensing devices were fabricated. At a doping ratio of 2:3, the optimal working temperature for the carbon-modified WO3 (C-WO3) nanoparticles is 160 °C. It exhibits a response value of 23.7 for 10 ppm of H2S gas, with a response and recovery time of 6 s/64 s. The material demonstrates excellent selectivity, repeatability, and long-term stability for detecting H2S gas. These outstanding performance characteristics make it a promising candidate for H2S gas detection applications. This modification enhances the material’s gas-sensing performance and its resistance to interference. Finally, first-principles calculations revealed the mechanism behind the improvement in the H2S gas-sensing performance of carbon-modified WO3 sensing materials.