Kim, Yesol Cho, Seho Lee, Sungho Lee, Young-Seak 2024-01-20T14:01:31Z 2024-01-20T14:01:31Z 2021-09-04 2012-10 1976-4251 https://pubs.kist.re.kr/handle/201004/128838 Nanoporous non-woven carbon fibers for a gas sensor were prepared from a pitch/polyacrylonitrile (PAN) mixed solution through an electrospinning process and their gas-sensing properties were investigated. In order to create nanoscale pores, magnesium oxide (MgO) powders were added as a pore-forming agent during the mixing of these carbon precursors. The prepared nanoporous carbon fibers derived from the MgO pore-forming agent were characterized by scanning electron microscopy (SEM), N-2-adsorption isotherms, and a gassensing analysis. The SEM images showed that the MgO powders affected the viscosity of the pitch/PAN solution, which led to the production of beaded fibers. The specific surface area of carbon fibers increased from 2.0 to 763.2 m(2)/g when using this method. The template method therefore improved the porous structure, which allows for more efficient gas adsorption. The sensing ability and the response time for the NO gas adsorption were improved by the increased surface area and micropore fraction. In conclusion, the carbon fibers with high micropore fractions created through the use of MgO as a pore-forming agent exhibited improved NO gas sensitivity. English KOREAN CARBON SOC Fabrication and Characterization of Porous Non-Woven Carbon Based Highly Sensitive Gas Sensors Derived by Magnesium Oxide Article 10.5714/CL.2012.13.4.254 2 CARBON LETTERS, v.13, no.4, pp.254 - 259 CARBON LETTERS 13 4 254 259 kci ART001706791 000209126000010 Chemistry, Multidisciplinary Materials Science, Multidisciplinary Chemistry Materials Science Article carbon fibers electrodes electrospinning gas sensor porous carbon