화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Applied Chemistry for Engineering, Vol.23, No.1, 47-52, February, 2012
Export Citation
다공성 및 아민 작용기에 따른 탄소나노섬유의 CO2 감응특성
CO2 Sensing Characteristics of Carbon-nanofibers Based on Effects of Porosity and Amine Functional Group
김종구, 강석창, 신은정1, 김다영, 이진희, 이영석†
  • 충남대학교 공과대학 정밀응용화학과
  • 1한국기초과학지원연구원 전주센터
Jong Gu Kim, Seok Chang Kang, Eunjeong Shin1, Da Young Kim, Jin Hee Lee, and Young-Seak Lee†
  • Department of Fine Chemical Engineering Applied Chemistry, Chungnam National University, Daejeon 303-764, Korea
  • 1Korea Basic Science Institute (KBSI), Jeonju 561-756, Korea
E-mail:
초록
다공성 탄소나노섬유의 아민 작용기에 따른 CO2 가스 감응특성을 고찰하고자, 아민작용기가 도입된 다공성 탄소나노섬유 기반 CO2 가스센서를 제조하였다. Polyacrylonitrile를 전구체로 하여 전기방사법을 통해 나노섬유를 제조하였으며, 열처리 및 화학적 활성화 공정, 그리고 Diethylenetriamine 액상처리법을 통하여 아민작용기가 도입된 다공성 탄소나노섬유를 제조하였다. BET 비표면적 분석결과, 화학적 활성화법에 의해 최대 2000 m2/g까지 탄소나노섬유의 비표면적이 향상됨을 확인하였으며, FT-IR 분광법을 통해 아민 작용기의 도입을 확인하였다. 아민 작용기가 도입된 가스센서의 CO2 가스 감응특성은 다공성 탄소섬유 기반 가스센서에 비해 약 4배 향상됨을 확인하였다. 결과적으로 화학적 활성화법에 의해 발달된 기공특성과 아민작용기 도입에 따른 화학흡착 유도에 의하여 감응특성이 향상되었음을 확인 하였다.
Porous carbon nanofibers were prepared as a gas sensor electrode to study the CO2 sensing property based on effects of porosity and introduced amine functional groups. Electrospun fibers were obtained by using electrospinning method with polyacrylonitrile precursor and they were treated by the thermal treatment and chemical activation. Amine functional groups were introduced by the liquid state treatment using diethylenetriamine. The specific surface area increased up to 2000 m2/g by the chemical activation. The Introduced amine functional group was identified using FT-IR spectroscopy. CO2 gas sensing property was improved as four folds via introduced amine functional groups on the activated carbon nanofiber. In conclusion, the gas sensing property was improved based on the developed porosity by the chemical activation and the chemical attraction of CO2 gas by introduced functional groups.
Keywords:carbon dioxide sensor;carbon nanofiber;electrospinning;chemical activation;porosity
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