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<p>Nanostructured zinc oxide (ZnO) was obtained by spray pyrolysis, deposited on glass substrate at 350°C. X-ray diffraction (XRD) results revealed a hexagonal wurtzite structure of ZnO nanograins. Morphological studies confirmed a homogeneous pattern with the formation of spherical structures, and compositional studies confirmed the formation of pure ZnO. The prepared material was exposed to different volatile organic compounds (VOCs) at elevated temperature. The ZnO nanograins showed the best response to ammonia at an operating temperature of 350°C, with a range of detection of around 1–500&#xa0;ppm. The response and recovery time for 50&#xa0;ppm ammonia were recorded at 33&#xa0;s and 38&#xa0;s, respectively.</p> Graphical Abstract <p></p>

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High-Temperature Ammonia Sensor Based on Spray-Deposited Zinc Oxide (ZnO) Nanograins

  • 期刊论文

  • 发表日期：

    2025年2月28日

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  • K. B. Venkatesh,
  • K. Sri Varshini,
  • B. Reyoun Frances,
  • B. G. Jeyaprakash,
  • D. Balamurugan

摘要

Nanostructured zinc oxide (ZnO) was obtained by spray pyrolysis, deposited on glass substrate at 350°C. X-ray diffraction (XRD) results revealed a hexagonal wurtzite structure of ZnO nanograins. Morphological studies confirmed a homogeneous pattern with the formation of spherical structures, and compositional studies confirmed the formation of pure ZnO. The prepared material was exposed to different volatile organic compounds (VOCs) at elevated temperature. The ZnO nanograins showed the best response to ammonia at an operating temperature of 350°C, with a range of detection of around 1–500 ppm. The response and recovery time for 50 ppm ammonia were recorded at 33 s and 38 s, respectively.

Graphical Abstract