Effects of improved porosity and electrical conductivity on pitch-based carbon nanofibers for high-performance gas sensors
- Effects of improved porosity and electrical conductivity on pitch-based carbon nanofibers for high-performance gas sensors
- 이성규; 임지선; 강석창; 이성호; 이영석
- Gas sensor; Electrical conductivity; Carbon fiber; Multi-wall carbon nanotube; Pitch; Porosity
- Issue Date
- Journal of porous materials
- VOL 19, NO 6, 989-994
- 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
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