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Korean Carbon Society (한국탄소학회)
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Pore Structure Characterization of Poly(vinylidene chloride)-Derived Nanoporous Carbons

  • Jung, Hwan Jung (Institute of Advanced Composite Materials, Korea Institute of Science and Technology) ;
  • Kim, Yong-Jung (Research Institute of Industrial Science and Technology) ;
  • Lee, Dae Ho (Department of Chemistry, Graduate School of Science, Chiba University) ;
  • Han, Jong Hun (Deptment of School of Applied Chemical Engineering, Chonnam National University) ;
  • Yang, Kap Seung (Department of Polymer & Fiber System Engineering, Chonnam National University) ;
  • Yang, Cheol-Min (Institute of Advanced Composite Materials, Korea Institute of Science and Technology)
  • Received : 2012.08.08
  • Accepted : 2012.10.02
  • Published : 2012.10.31
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Abstract

Poly(vinylidene chloride) (PVDC)-derived nanoporous carbons were prepared by various activation methods: heat-treatment under an inert atmosphere, steam activation, and potassium hydroxide (KOH) activation at 873, 1073, and 1273 K. The pore structures of PVDC-derived nanoporous carbons were characterized by the $N_2$ adsorption technique at 77 K. Heat treatment in an inert atmosphere increased the specific surface area and micropore volume with elevating temperature, while the average micropore width near 0.65 nm was not significantly changed, reflecting the characteristic pore structure of ultramicroporous carbon. Steam activation for PVDC at 873 and 1073 K also yielded ultramicroporosity. On the other hand, the steam activated sample at 1273 K had a wider average micropore width of 1.48 nm, correlating with a supermicropore. The KOH activation increased the micropore volume with elevating temperature, which is accompanied by enlargement of the average micropore width from 0.67 to 1.12 nm. The average pore widths of KOH-activated samples were strongly governed by the activation temperature. We expect that these approaches can be utilized to simply control the porosity of PVDC-derived nanoporous carbons.

Keywords

Acknowledgement

Supported by : Korea Institute of Science and Technology (KIST)

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