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<p>This study reports the development of silver-doped zinc oxide (Ag–doped&#xa0;ZnO) thin film synthesized via chemical bath deposition method at room temperature for H<sub>2</sub>S gas sensing application. The structural, morphological and optical properties of&#xa0;the Ag–doped&#xa0;ZnO film were analyzed using X–ray diffraction (XRD), scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy (EDX) and UV–Visible spectroscopy (UV–Vis). Ag doping significantly enhanced the gas sensing response and lowered the optimal operating temperature to 200&#xa0;℃, compared to the undoped ZnO film prepared under identical conditions. The Ag–doped&#xa0;ZnO film exhibited a nearly linear response to H<sub>2</sub>S concentrations ranging from 5 to 50&#xa0;ppm at 200&#xa0;℃. These findings highlight the potential of Ag–doped ZnO thin films as cost-effective and scalable candidates for toxic gas detection in environmental monitoring applications.</p>

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Cost-effective Ag-doped ZnO thin film with conical nanostructures for enhanced H2S gas sensing performance

  • 期刊论文

  • 发表日期：

    2025年8月26日

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  • Savita S. Dange,
  • Sharad N. Dange,
  • Niranjan S. Ramgir,
  • Pravin S. More

摘要

This study reports the development of silver-doped zinc oxide (Ag–doped ZnO) thin film synthesized via chemical bath deposition method at room temperature for H2S gas sensing application. The structural, morphological and optical properties of the Ag–doped ZnO film were analyzed using X–ray diffraction (XRD), scanning electron microscopy (SEM) with energy-dispersive X-ray spectroscopy (EDX) and UV–Visible spectroscopy (UV–Vis). Ag doping significantly enhanced the gas sensing response and lowered the optimal operating temperature to 200 ℃, compared to the undoped ZnO film prepared under identical conditions. The Ag–doped ZnO film exhibited a nearly linear response to H2S concentrations ranging from 5 to 50 ppm at 200 ℃. These findings highlight the potential of Ag–doped ZnO thin films as cost-effective and scalable candidates for toxic gas detection in environmental monitoring applications.