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Highly Selective Gas Sensor for Rapid Detection of Ethylene Developed Using Pt Nanoparticles Functionalized MnO

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— 2 min read

A team of researchers at Henan Polytechnic University in China has developed a highly selective gas sensor for the rapid detection of ethylene using Pt nanoparticles functionalized MnO. According to the study, the newly designed sensor exhibits excellent ethylene gas-sensing performance, with a maximum response value of 7.4-1000 ppm of CH at 180°C and a decrease in the optimal operating temperature from 360°C to 180°C after loading Pt. The improvement in gas-sensing performance is attributed to the synergistic effects of spillover and the nanoSchottky barrier.

Key Takeaways:

  • The researchers prepared MnO nanorods and Pt-modified MnO nanorods using hydrothermal and reduction methods, which exhibited excellent ethylene gas-sensing performance when the Pt loading was 3 atom %.
  • The synthesized 3 atom % Pt/MnO nanocomposite demonstrated a maximum response value of 7.4-1000 ppm of CH at 180°C and showed excellent selectivity and good repeatability.
  • The optimal operating temperature of MnO decreased from 360°C to 180°C after loading Pt, showing the impact of Pt on the gas-sensing performance.
  • The study used X-ray diffractometer (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscope (TEM), and XPS techniques to characterize the samples.
  • The developed gas sensor is promising for industrial process monitoring due to its high response value at low temperatures and good selectivity.
  • The researchers also noted that current reports of vinyl sensors fail to meet real-time monitoring requirements, and this work enables the realization of a material that exhibits higher response values at low temperatures.

Statistics:

  • The maximum response value of the Pt/MnO nanocomposite is 7.4-1000 ppm of CH at 180°C.
  • The optimal operating temperature of MnO decreased from 360°C to 180°C after loading Pt.
  • The synthesized 3 atom % Pt/MnO nanocomposite shows excellent selectivity, with a maximum response value of 7.4.
  • The gas sensor exhibits good repeatability, indicating its potential for industrial process monitoring.
  • The study used XRD, FESEM, TEM, and XPS techniques to characterize the samples, each providing valuable information on the structure and performance of the gas sensor.

Sources:

  • NewsRx. Henan Polytechnic University Reports Findings in Nanoparticles (Highly Selective Gas Sensor for Rapid Detection of Ethylene Using Pt Nanoparticles Functionalized Mn3O4). Nanotechnology Weekly. July 14, 2025; p 1361.
  • Highly Selective Gas Sensor for Rapid Detection of Ethylene Using Pt Nanoparticles Functionalized Mn3O4. Langmuir, 2025.
  • Langmuir can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA.
  • Additional authors for this research include Yan Wang, Mingqiao Yu, Xueya Sun, Rongrong Lei, Lanlan Guo, Jianliang Cao, and Cong Qin.
  • Keywords: Asia, Jiaozuo, Alkenes, Nanorods, Ethylenes, Nanoparticles, Nanotechnology, Acyclic Hydrocarbons, Emerging Technologies, People's Republic of China.

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