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<p>In this research, the need for reliable ethanol gas detection due to its health and industrial significance has been addressed by fabricating a cost-effective resistive ethanol gas sensor. Hollow porous zinc stannate (ZnSnO<sub>3</sub>) spheres were synthesized via a co-precipitation method. Interdigitated electrodes (IDEs) of gold, silver, and aluminum were fabricated on alumina substrates to investigate the influence of electrode materials on performance. Comprehensive characterization (XRD, SEM, FTIR, UV–Vis) confirmed the amorphous, porous morphology of ZnSnO₃, providing a large active surface area for gas adsorption. Among the fabricated sensors, the gold-based device exhibited the highest response of 200 to 100 ppm ethanol at 300 °C, with fast response (14 s) and recovery (83 s) times and excellent stability. The enhanced sensing behavior is attributed to the porous structure and improved electrical interface with gold electrodes. These results demonstrate that PHMS-ZnSnO₃ offers a promising route for high-performance and low-cost ethanol sensing applications.</p>

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Porous ZnSnO3 hollow spheres for high-sensitivity ethanol gas sensing

  • 期刊论文

  • 发表日期：

    2025年12月3日

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  • Hadi Riyahi Madvar,
  • Mohammad Hasan Zarei,
  • Zoheir Kordrostami,
  • Kourosh Hassanli

摘要

In this research, the need for reliable ethanol gas detection due to its health and industrial significance has been addressed by fabricating a cost-effective resistive ethanol gas sensor. Hollow porous zinc stannate (ZnSnO3) spheres were synthesized via a co-precipitation method. Interdigitated electrodes (IDEs) of gold, silver, and aluminum were fabricated on alumina substrates to investigate the influence of electrode materials on performance. Comprehensive characterization (XRD, SEM, FTIR, UV–Vis) confirmed the amorphous, porous morphology of ZnSnO₃, providing a large active surface area for gas adsorption. Among the fabricated sensors, the gold-based device exhibited the highest response of 200 to 100 ppm ethanol at 300 °C, with fast response (14 s) and recovery (83 s) times and excellent stability. The enhanced sensing behavior is attributed to the porous structure and improved electrical interface with gold electrodes. These results demonstrate that PHMS-ZnSnO₃ offers a promising route for high-performance and low-cost ethanol sensing applications.