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Korean Carbon Society (한국탄소학회)
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Hydrogen Adsorption of PAN-based Porous Carbon Nanofibers using MgO as the Substrate

  • Jung, Min-Jung (Dept. of Applied Chemistry and Biological Engineering, Chungnam National University) ;
  • Im, Ji-Sun (Dept. of Applied Chemistry and Biological Engineering, Chungnam National University) ;
  • Jeong, Eui-Gyung (Dept. of Applied Chemistry and Biological Engineering, Chungnam National University) ;
  • Jin, Hang-Kyo (Korea Research Institute of Chemical Technology) ;
  • Lee, Young-Seak (Dept. of Applied Chemistry and Biological Engineering, Chungnam National University)
  • Received : 2009.06.30
  • Accepted : 2009.08.13
  • Published : 2009.09.30
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Abstract

In this study, porous electrospun carbon fibers were prepared by electrospinning with PAN and $MgCl_2$, as a MgO precursor. MgO was selected as a substrate because of its chemical and thermal stability, no reaction with carbon, and ease of removal after carbonization by dissolving out in acidic solutions. $MgCl_2$ was mixed with polyacrylonitrile (PAN) solution as a precursor of MgO with various weight ratios of $MgCl_2$/PAN. The average diameter of porous electrospun carbon fibers increased from 1.3 to 3 ${\mu}m$, as the $MgCl_2$ to PAN weight ratio increased. During the stabilization step, $MgCl_2$ was hydrolyzed to MgOHCl by heat treatment. At elevated temperature of 823 K for carbonization step, MgOHCl was decomposed to MgO. Specific surface area and pore structure of prepared electrospun carbon fibers were decided by weight ratio of $MgCl_2$/PAN. The amount of hydrogen storage increased with increase of specific surface area and micropore volume of prepared electrospun carbon fibers.

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