Journal of Porous Materials

, Volume 19, Issue 6, pp 989–994 | Cite as

Effects of improved porosity and electrical conductivity on pitch-based carbon nanofibers for high-performance gas sensors

  • Sung Kyu Lee
  • Ji Sun Im
  • Seok Chang Kang
  • Sungho Lee
  • Young-Seak Lee


Pitch-based carbon fibers with multi-walled carbon nanotubes (MWCNTs) were fabricated via an electrospinning method and used as gas sensor electrodes. The pitch-based carbon fibers were treated at various temperatures to investigate the effect of the reaction temperature. The electrospun fibers were thermally treated to produce carbon fibers, and the resulting material was chemically activated to increase the number of active sites for efficient gas adsorption. The activation process improved the porous structure by increasing the specific surface area by approximately 86-fold. Due to the improved porosity and electrical conductivity, gas adsorption sites were enlarged and electron transfer was improved, resulting in a high-performance NO gas sensor with improved sensitivity and rapid response time. The improved porosity was attributed to the chemical activation process, and the enhanced electrical conductivity was attributed to the heat treatment and the addition of MWCNTs.


Gas sensor Carbon fiber Pitch Multi-wall carbon nanotube Porosity Electrical conductivity 



This work was supported by a grant from Korea Institute of Science and Technology Institutional program.


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Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  • Sung Kyu Lee
    • 1
  • Ji Sun Im
    • 1
  • Seok Chang Kang
    • 1
  • Sungho Lee
    • 2
  • Young-Seak Lee
    • 1
  1. 1.Department of Applied Chemistry and Biological Engineering, BK21-E2 MChungnam National UniversityDaejeonRepublic of Korea
  2. 2.Institute of Advanced Composites Materials, Korea Institute of Science and TechnologyWanju-gun, Jeollabuk-doRepublic of Korea

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