Scholarlink

<p>Detecting trace levels of volatile organic compounds (VOCs) at ambient conditions with high accuracy remains a major hurdle for gas sensors based on metal oxide semiconductors (MOS). In this study, we developed a hybrid material by integrating Poly(3,4-ethylenedioxythiophene): polystyrene sulfonate (PEDOT: PSS) with tungsten oxide (WO₃) via a combination of solvothermal synthesis and in situ polymerization. The structural and morphological features of WO₃ and the PEDOT: PSS@WO₃ hybrid were examined using X-ray diffraction (XRD), scanning electron microscopy (SEM), and elemental mapping. Gas-sensing performance tests were conducted for PEDOT: PSS, WO₃, and PEDOT: PSS@WO₃ towards several hazardous gases, including methanol (CH₃OH), ammonia (NH₃), hydrogen sulfide (H₂S), nitrogen dioxide (NO₂), and carbon dioxide (CO₂). Parameters such as sensitivity, response and recovery times, and repeatability were systematically evaluated. Among the tested gases, the PEDOT: PSS@WO₃ sensor exhibited superior response and heightened sensitivity toward methanol. Specifically, the sensor’s response to CH₃OH concentrations of 1, 50, and 100 ppb were approximately 14 ± 2%, 355 ± 5%, and 798 ± 10%, respectively. Furthermore, the device demonstrated fast response and recovery times of 30 ± 0.05&#xa0;s and 35 ± 0.03&#xa0;s for 100 ppb methanol at room temperature. The capability to operate efficiently at ambient conditions underscores the potential of this hybrid material for environmental monitoring. These findings highlight that the well-aligned PEDOT: PSS@WO₃ composite is a highly promising platform for rapid and selective methanol detection.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Room-temperature methanol sensing using PEDOT: PSS–WO₃ hybrid nanocomposites with enhanced sensitivity and fast response

  • 期刊论文

  • 发表日期：

    2025年10月22日

查看全文
  • Jarabala Ranga,
  • S. Selva Kumar,
  • V. Daya Sagar Ketaraju,
  • Jnaneshwar Pai Maroor,
  • Ramakrishna Kolikipogu,
  • D. Gopinath

摘要

Detecting trace levels of volatile organic compounds (VOCs) at ambient conditions with high accuracy remains a major hurdle for gas sensors based on metal oxide semiconductors (MOS). In this study, we developed a hybrid material by integrating Poly(3,4-ethylenedioxythiophene): polystyrene sulfonate (PEDOT: PSS) with tungsten oxide (WO₃) via a combination of solvothermal synthesis and in situ polymerization. The structural and morphological features of WO₃ and the PEDOT: PSS@WO₃ hybrid were examined using X-ray diffraction (XRD), scanning electron microscopy (SEM), and elemental mapping. Gas-sensing performance tests were conducted for PEDOT: PSS, WO₃, and PEDOT: PSS@WO₃ towards several hazardous gases, including methanol (CH₃OH), ammonia (NH₃), hydrogen sulfide (H₂S), nitrogen dioxide (NO₂), and carbon dioxide (CO₂). Parameters such as sensitivity, response and recovery times, and repeatability were systematically evaluated. Among the tested gases, the PEDOT: PSS@WO₃ sensor exhibited superior response and heightened sensitivity toward methanol. Specifically, the sensor’s response to CH₃OH concentrations of 1, 50, and 100 ppb were approximately 14 ± 2%, 355 ± 5%, and 798 ± 10%, respectively. Furthermore, the device demonstrated fast response and recovery times of 30 ± 0.05 s and 35 ± 0.03 s for 100 ppb methanol at room temperature. The capability to operate efficiently at ambient conditions underscores the potential of this hybrid material for environmental monitoring. These findings highlight that the well-aligned PEDOT: PSS@WO₃ composite is a highly promising platform for rapid and selective methanol detection.