Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Nitric Oxide Sensing Property of Gas Sensor Based on Activated Carbon Fiber Radiated by Electron-beam

전자빔이 조사된 활성탄소섬유 기반 가스센서의 일산화질소 감지 특성

  • Lee, Sangmin (Department of Chemical Engineering and Applied Chemistry, Chungnam National University) ;
  • Jung, Min-Jung (Department of Chemical Engineering and Applied Chemistry, Chungnam National University) ;
  • Lee, Kyeong Min (Department of Chemical Engineering and Applied Chemistry, Chungnam National University) ;
  • Lee, Young-Seak (Department of Chemical Engineering and Applied Chemistry, Chungnam National University)
  • 이상민 (충남대학교 응용화학공학과) ;
  • 정민정 (충남대학교 응용화학공학과) ;
  • 이경민 (충남대학교 응용화학공학과) ;
  • 이영석 (충남대학교 응용화학공학과)
  • Received : 2017.02.25
  • Accepted : 2017.03.22
  • Published : 2017.06.10
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Abstract

Activated carbon fibers (ACFs) were surface-modified by electron beam (E-beam) irradiation and used as a gas sensor electrode to investigate the effect of E-beam on nitric oxide (NO) gas sensing performance. XPS results showed that the oxygen component of ACFs surface treated by E-beam decreased and $sp^2$ bonded carbon of ACFs surface increased. These results were attributed to the structural transformation of ACFs surface irradiated by E-beam. NO gas sensitivity of the electrode composed of ACFs irradiated by100 kGy increased from about 4% to 8%, and the response time was also meaningfully enhanced from 360 s to 120 s. This is due to the fact that the $sp^2$ carbon bond increased by E-beam irradiation of activated carbon fibers, which significantly affects the resistance change of the electrode in NO gas sensing.

활성탄소섬유가 전사선 조사에 의해 표면 개질되었고, NO가스 감지 능력에 미치는 영향을 살펴보기 위하여 이를 가스센서 전극으로 이용하였다. XPS 분석결과는 전자선에 의하여 표면처리된 활성탄소섬유의 산소 성분이 감소하였으며 표면의 $sp^2$ 결합탄소가 증가한 것을 보여주었다. 이러한 결과는 전자빔 조사에 따른 활성탄소섬유 표면의 구조적 변형때문으로 사료된다. 100 kGy의 전자빔이 조사된 활성탄소섬유 전극의 NO가스 민감도는 약 4%에서 약 8%로 크게 증가하였고, 그 감지 시간 또한 약 360 s에서 120 s로 의미 있게 향상되었다. 이러한 결과는 활성탄소섬유의 전자빔 조사에 의하여 $sp^2$ 탄소 결합의 증가때문에 기인한 것으로, 이는 NO가스 센싱에 대한 전극저항 변화에 상당히 영향을 주었다.

Keywords

References

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