화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.76, 181-187, August, 2019
DOI10.1016/j.jiec.2019.03.037  Export Citation
Improvement in NO gas-sensing properties using heterojunctions between polyaniline and nitrogen on activated carbon fibers
Min-Ji Kim1, 2, Kyung Hoon Kim1, 2, Xiaoping Yang3, Yunhua Yu3, and Young-Seak Lee1, 2, †
  • 1Department of Applied Chemistry and Biological Engineering, Chungnam National University, Daejeon, 34134, Republic of Korea
  • 2Institute of Carbon Fusion Technology (InCFT), Chungnam National University, Daejeon 34134, Republic of Korea
  • 3State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
E-mail:
The effect of heterojunctions between polyaniline (PANi) and nitrogen-containing carbon fibers (NCFs) on NO gas-sensing properties were investigated, and the influence of the heterojunction area on the NO gas-sensing performance was confirmed. We prepared NCFs and nitrogen-containing activated carbon fibers (NACFs) from polyacrylonitrile fibers and then loaded them with PANi so they could be used as gas-sensing materials. In the NO gas-sensing tests, the NCFs and pristine PANi exhibited p-type behavior with decreased responses over time, and the PANi-loaded NCFs (PANi/NCFs) exhibited different behavior with a very high response (281.0%). This high response can be attributed to the formation of p-p heterojunctions at the interfaces between the PANi and NCFs caused by the graphitic nitrogen in the NCFs. Moreover, the response of the PANi-loaded NACFs (PANi/NACFs) was 2.2 times that of the PANi/NCFs, which is due to the activation of NCFs increasing the p-p heterojunction area of the PANi/NACFs.
Keywords:Gas-sensing;Nitrogen-containing carbon fibers (NCFs);Activated carbon fibers (ACFs);Polyaniline(PANi);Heterojunctions
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