Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Acetone Sensing Characteristics of ZnO Nanoparticles Prepared from Zeolitic Imidazolate Framework-7

Zeolitic Imidazolate Framework-7로 합성한 ZnO 나노입자의 Acetone 가스 감응 특성

  • Yoon, Ji Won (Department of Materials Science and Engineering, Korea University) ;
  • Wang, Rui (Department of Materials Science and Engineering, Korea University) ;
  • Park, Joon-Shik (Smart Sensor Research Center, Korea Electronics Technology Institute) ;
  • Lee, Jong-Heun (Department of Materials Science and Engineering, Korea University)
  • 윤지원 (고려대학교 신소재공학부) ;
  • ;
  • 박준식 (전자부품연구원 스마트센서연구센터) ;
  • 이종흔 (고려대학교 신소재공학부)
  • Received : 2017.05.15
  • Accepted : 2017.05.26
  • Published : 2017.05.31
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Abstract

Highly uniform and well-dispersed Zeolitic Imidazolate Framework-7 (ZIF-7) particles were prepared by the precipitation of $Zn^{2+}$ using benzimidazole, which were converted into ZnO nanoparticles by heat treatment at $500^{\circ}C$ for 24 h. The ZIF-7 derived ZnO nanoparticles showed abundant mesopores, high surface area, and good dispersion. The gas sensing characteristics toward 5 ppm acetone, ethanol, trimethylamine, ammonia, p-xylene, toluene, benzene, and carbon monoxide and carbon dioxide were investigated at $350-450^{\circ}C$. ZIF-7 derived ZnO nanoparticles exhibited high response to 5 ppm acetone ($R_a/R_g=57.6$; $R_a$: resistance under exposure to the air, Rg: resistance under exposure to the gas) at $450^{\circ}C$ and negligible cross-responses to other interference gases (trimethylamine, ammonia, p-xylene, toluene, benzene, carbon monoxide, carbon dioxide) and relatively low responses to ethanol. ZIF derived synthesis of metal oxide nanoparticles can be used to design high performance acetone sensors.

Keywords

References

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