Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Fabrication and Evaluation of the SnO2 Based Gas Sensor for CO and NOx Detection

SnO2를 이용한 CO 및 NOx 가스 감지 센서 제작 및 특성 연구

  • Kim, Man Jae (Department of Automotive Engineering, Graduate School of Industry, Seoul National University of Science and Technology) ;
  • Lee, Yu-Jin (Department of Materials Science and Engineering, Seoul National University of Science and Technology) ;
  • Ahn, Hyo-Jin (Department of Materials Science and Engineering, Seoul National University of Science and Technology) ;
  • Lee, Sang Hoon (Department of Automotive Engineering, Graduate School of Industry, Seoul National University of Science and Technology)
  • 김만재 (서울과학기술대학교 산업대학원 자동차공학과) ;
  • 이유진 (서울과학기술대학교 신소재공학과) ;
  • 안효진 (서울과학기술대학교 신소재공학과) ;
  • 이상훈 (서울과학기술대학교 산업대학원 자동차공학과)
  • Received : 2015.02.17
  • Accepted : 2015.05.13
  • Published : 2015.09.01
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Abstract

In this paper, we fabricated and evaluated the gas sensor for the detection of CO gas and $NO_X$ gas among the vehicle exhaust emission gasses. The $SnO_2$ (tin dioxide) layer is used as the detection material, and the thin-film type and the nano-fiber type layers are deposited with various thicknesses using sputtering method and electro spinning method, respectively. The experiments are performed in the chamber where the gas concentration is controlled with mass flow controller. The fabricated devices are applied to the CO and $NO_X$ gas, where the device with the thinner $SnO_2$ layer shows better sensitivity. The nano-fiber has the larger surface area, and the shorter response time and recovery time are obtained. From the experimental results, both types of gas sensors successfully detect CO and $NO_X$ gases, which can be applied to measure those gases from the vehicle emissions.

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References

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