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Hydrogen Adsorption of PAN-based Porous Carbon Nanofibers using MgO as the Substrate

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2009, 10(3), pp.217-220
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General

정민정 1 Im Ji Sun 1 Jeong Eui gyung 2 Hangkyo Jin 3 이영석 1

1충남대학교
2Chungnam National University
3Korea Research Institute of Chemical Technology,

Candidate

ABSTRACT

In this study, porous electrospun carbon fibers were prepared by electrospinning with PAN and MgCl2, 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 aftercarbonization by dissolving out in acidic solutions. MgCl2 was mixed with polyacrylonitrile (PAN) solution as a precursor ofMgO with various weight ratios of MgCl2/PAN. The average diameter of porous electrospun carbon fibers increased from 1.3 to3 μm, as the MgCl2 to PAN weight ratio increased. During the stabilization step, MgCl2 was hydrolyzed to MgOHCl by heattreatment. At elevated temperature of 823 K for carbonization step, MgOHCl was decomposed to MgO. Specific surface area andpore structure of prepared electrospun carbon fibers were decided by weight ratio of MgCl2/PAN. The amount of hydrogenstorage increased with increase of specific surface area and micropore volume of prepared electrospun carbon fibers.

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