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<p>This study reports the fabrication and evaluation of nanocomposite films composed of molybdenum disulfide (MoS<sub>2</sub>), tris(8-hydroxyquinolinato)aluminum (Alq3), and poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT: PSS) for potential CO<sub>2</sub> gas sensing applications. The sensor design employs a fluorine-doped tin oxide (FTO) coated glass substrate, with the active sensing layer confined to the central region. Comprehensive structural and electrical analyses were conducted to evaluate the material’s performance in the presence of target gases. Atomic force microscopy (AFM) and X-ray diffraction (XRD) confirmed the successful formation of the nanocomposite films. The CO<sub>2</sub> sensing tests revealed excellent sensitivity at a concentration of 1000 ppm, along with high selectivity against interfering gases such as NH<sub>3</sub>, NO<sub>2</sub>, and CH<sub>4</sub>. The sensor also demonstrated remarkable stability over 30 days of operation, indicating that the MoS<sub>2</sub>:Alq3:PEDOT: PSS hybrid system holds strong potential for next-generation gas sensing technologies.</p>

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MoS2, Alq3 and PEDOT: PSS based nanocomposite for CO2 gas sensing application

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年10月6日

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  • Kiran Khaitan,
  • Shweta Tripathi

摘要

This study reports the fabrication and evaluation of nanocomposite films composed of molybdenum disulfide (MoS2), tris(8-hydroxyquinolinato)aluminum (Alq3), and poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT: PSS) for potential CO2 gas sensing applications. The sensor design employs a fluorine-doped tin oxide (FTO) coated glass substrate, with the active sensing layer confined to the central region. Comprehensive structural and electrical analyses were conducted to evaluate the material’s performance in the presence of target gases. Atomic force microscopy (AFM) and X-ray diffraction (XRD) confirmed the successful formation of the nanocomposite films. The CO2 sensing tests revealed excellent sensitivity at a concentration of 1000 ppm, along with high selectivity against interfering gases such as NH3, NO2, and CH4. The sensor also demonstrated remarkable stability over 30 days of operation, indicating that the MoS2:Alq3:PEDOT: PSS hybrid system holds strong potential for next-generation gas sensing technologies.