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Abstract <p>This study involves the prepration of ZnCo<sub>2</sub>O<sub>4</sub> and ZnCo<sub>2</sub>O<sub>4</sub>/graphene nanostructures to investigate their sensing capabilities toward ethylene glycol vapors (in different concentrations 100-500 ppm). Several characterizations were carried out to confirm the composition and identify the prepared samples, including XRD (X-ray diffraction), EDX (energy dispersive X-ray spectroscopy), FESEM (field emission scanning electron microscopy), FTIR (Fourier transform infrared spectroscopy), DRS (diffuse reflectance spectroscopy), and BET (Brunauer–Emmett–Teller analysis). Although there is a slight difference between the responses of ZnCo<sub>2</sub>O<sub>4</sub> and ZnCo<sub>2</sub>O<sub>4</sub>/graphene, the response time of ZnCo<sub>2</sub>O<sub>4</sub>/graphene sample was significantly better and the linear responses belonged to the ZnCo<sub>2</sub>O<sub>4</sub>/graphene-based sensor. The ZnCo<sub>2</sub>O<sub>4</sub>/graphene based sensor appears more suitable for practical applications. The ZnCo<sub>2</sub>O<sub>4</sub>/graphene based sensor has the best selevtivity toward ethylene glycol in the presence of other gas vapors including ethanol, acetone, N,N-Dimethylformamide, isopropanol, methanol, and triethylamine. The limit of detection of the mentioned sensor was found 33 parts per billion (ppb).</p> Graphical Abstract <p></p>

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Breathtaking competition in ethylene glycol sensing of ZnCo2O4 and ZnCo2O4/graphene nanoparticles

  • 期刊论文

  • 发表日期：

    2025年7月26日

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  • Arefeh Rezapour,
  • Samaneh Rasouli Jamnani,
  • Abbas Bagheri Khatibani,
  • Zahra Tirehdast,
  • Ensie Basiri Tochaee

摘要

Abstract

This study involves the prepration of ZnCo2O4 and ZnCo2O4/graphene nanostructures to investigate their sensing capabilities toward ethylene glycol vapors (in different concentrations 100-500 ppm). Several characterizations were carried out to confirm the composition and identify the prepared samples, including XRD (X-ray diffraction), EDX (energy dispersive X-ray spectroscopy), FESEM (field emission scanning electron microscopy), FTIR (Fourier transform infrared spectroscopy), DRS (diffuse reflectance spectroscopy), and BET (Brunauer–Emmett–Teller analysis). Although there is a slight difference between the responses of ZnCo2O4 and ZnCo2O4/graphene, the response time of ZnCo2O4/graphene sample was significantly better and the linear responses belonged to the ZnCo2O4/graphene-based sensor. The ZnCo2O4/graphene based sensor appears more suitable for practical applications. The ZnCo2O4/graphene based sensor has the best selevtivity toward ethylene glycol in the presence of other gas vapors including ethanol, acetone, N,N-Dimethylformamide, isopropanol, methanol, and triethylamine. The limit of detection of the mentioned sensor was found 33 parts per billion (ppb).

Graphical Abstract