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<p>Ethylene glycol is a volatile organic compound (VOC), poses severe threats to human health. Thus, efficient monitoring of ethylene glycol is crucial. In this study, ZnO microspheres self-assembled from ZnO nanosheets are synthesized via a simple hydrothermal approach with urea as the medium, subsequent doping with noble metal Pt yielded Pt-ZnO nanosheet-like microspheres (Pt-ZnO NSs) for enhanced ethylene glycol sensing. Pt-ZnO NSs sensor exhibits a high response of 310.74 toward 100 ppm ethylene glycol at 210&#xa0;°C, with response/recovery times of 45&#xa0;s/14 s. This excellent performance originates primarily from the large specific surface area of Pt-ZnO NSs, which provides abundant adsorption sites for ethylene glycol molecules. Combined with Density functional theory (DFT) calculations, results demonstrate that Pt modification reduces the adsorption energy (-1.46&#xa0;eV) of ZnO for ethylene glycol, and facilitates charge transfer between ZnO and gas molecules. Overall, these findings highlight the considerable potential of Pt-ZnO NSs for ethylene glycol sensing applications.</p>

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Pt-modified ZnO microstructures synthesized via a urea-assisted method for enhanced ethylene glycol sensing

  • 期刊论文

  • 发表日期：

    2025年12月22日

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  • Jijun Ding,
  • Yonghui Wang,
  • Bowei Liu,
  • Hangfei Dai,
  • Haixia Chen,
  • Haiwei Fu

摘要

Ethylene glycol is a volatile organic compound (VOC), poses severe threats to human health. Thus, efficient monitoring of ethylene glycol is crucial. In this study, ZnO microspheres self-assembled from ZnO nanosheets are synthesized via a simple hydrothermal approach with urea as the medium, subsequent doping with noble metal Pt yielded Pt-ZnO nanosheet-like microspheres (Pt-ZnO NSs) for enhanced ethylene glycol sensing. Pt-ZnO NSs sensor exhibits a high response of 310.74 toward 100 ppm ethylene glycol at 210 °C, with response/recovery times of 45 s/14 s. This excellent performance originates primarily from the large specific surface area of Pt-ZnO NSs, which provides abundant adsorption sites for ethylene glycol molecules. Combined with Density functional theory (DFT) calculations, results demonstrate that Pt modification reduces the adsorption energy (-1.46 eV) of ZnO for ethylene glycol, and facilitates charge transfer between ZnO and gas molecules. Overall, these findings highlight the considerable potential of Pt-ZnO NSs for ethylene glycol sensing applications.