$CO_2$ Sensing Characteristics of Carbon-nanofibers Based on Effects of Porosity and Amine Functional Group

다공성 및 아민 작용기에 따른 탄소나노섬유의 $CO_2$ 감응특성

  • Kim, Jong Gu (Department of Fine Chemical Engineering Applied Chemistry, Chungnam National University) ;
  • Kang, Seok Chang (Department of Fine Chemical Engineering Applied Chemistry, Chungnam National University) ;
  • Shin, Eunjeong (Korea Basic Science Institute (KBSI)) ;
  • Kim, Da Young (Department of Fine Chemical Engineering Applied Chemistry, Chungnam National University) ;
  • Lee, Jin Hee (Department of Fine Chemical Engineering Applied Chemistry, Chungnam National University) ;
  • Lee, Young-Seak (Department of Fine Chemical Engineering Applied Chemistry, Chungnam National University)
  • 김종구 (충남대학교 공과대학 정밀응용화학과) ;
  • 강석창 (충남대학교 공과대학 정밀응용화학과) ;
  • 신은정 (한국기초과학지원연구원 전주센터) ;
  • 김다영 (충남대학교 공과대학 정밀응용화학과) ;
  • 이진희 (충남대학교 공과대학 정밀응용화학과) ;
  • 이영석 (충남대학교 공과대학 정밀응용화학과)
  • Published : 2012.02.10

Abstract

Porous carbon nanofibers were prepared as a gas sensor electrode to study the $CO_2$ 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 $2000m^2/g$ by the chemical activation. The Introduced amine functional group was identified using FT-IR spectroscopy. $CO_2$ 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 $CO_2$ gas by introduced functional groups.

Keywords

carbon dioxide sensor;carbon nanofiber;electrospinning;chemical activation;porosity

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