Preparation and gas-sensing properties of pitch-based carbon fiber prepared using a melt-electrospinning method
- Preparation and gas-sensing properties of pitch-based carbon fiber prepared using a melt-electrospinning method
- 김진훈; 이성호; 박수진; 이영석
- carbon fiber; pitch; gas-sensor; nitrogen oxide; Melt-electrospinning
- Issue Date
- Research on chemical intermediates
- VOL 40, NO 7, 2571-2581
- Pitch-based carbon fibers (PACFs) were fabricated using a melt-electrospinning method and used as a gas sensor electrode for nitric oxide (NO). The PACFs were modified through different heat-treatment temperatures (1,000, 1,650 and 2,300 °C) and activation conditions (2, 4 and 6 M KOH solutions) to investigate the effect of these processes on the structure and surface functionalities of the resultant fiber samples. Field emission scanning electron microscopy, elemental analyzer, Raman spectroscopy and pore analysis techniques were then employed to characterize the prepared samples. As a result of these modifications, the porosity and electrical conductivity, gas adsorption sites and an improved electron transfer. The improved porosity of the PACFs was attributed to the chemical activation process, whereas the enhanced electrical conductivity was also attributed to higher heat-treatment temperature. The sensing ability of the PACFs for NO-gas was thus significantly improved based on the effects of the chemical activation and higher heat-treatment temperatures. The performance of these PACFs as an NO-gas sensor system suggests promising application of carbon fibers as a novel and highly efficient NO-gas sensing material.
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