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<p>This study presents the development of a high-performance poly(o-toluidine)/graphene oxide (POT/GO) nanocomposite sensor for efficient H<sub>2</sub>S gas detection. The nanocomposite was synthesized using a facile in-situ polymerization method, ensuring uniform graphene oxide dispersion within the poly(o-toluidine) matrix. The structural and morphological characteristics of the materials were analyzed using Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), and UV-visible spectroscopy. The POT/GO sensor demonstrated a threefold improvement in sensitivity when compared to pure POT, with a maximum response of 99% at 100 ppm H<sub>2</sub>S. The sensor operates entirely at room temperature, with a rapid response of 90&#xa0;s and recovery of 85&#xa0;s times, and high selectivity against interfering gases. The findings underscore the promise of the POT/GO nanocomposite as a reliable and energy-efficient sensing material suitable for practical applications.</p>

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Development of next-generation organic nanomaterials- based sensors for environmental and healthcare applications

  • 期刊论文

  • 发表日期：

    2025年4月24日

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  • S. A. Al-Balawi,
  • M. A. Farea

摘要

This study presents the development of a high-performance poly(o-toluidine)/graphene oxide (POT/GO) nanocomposite sensor for efficient H2S gas detection. The nanocomposite was synthesized using a facile in-situ polymerization method, ensuring uniform graphene oxide dispersion within the poly(o-toluidine) matrix. The structural and morphological characteristics of the materials were analyzed using Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), and UV-visible spectroscopy. The POT/GO sensor demonstrated a threefold improvement in sensitivity when compared to pure POT, with a maximum response of 99% at 100 ppm H2S. The sensor operates entirely at room temperature, with a rapid response of 90 s and recovery of 85 s times, and high selectivity against interfering gases. The findings underscore the promise of the POT/GO nanocomposite as a reliable and energy-efficient sensing material suitable for practical applications.