Preparation and pore control of highly mesoporous carbon from defluorinated PTFE

Porous carbon having more than 2000 m 2/g of BET specific surface area was synthesized by defluorination of polytetrafluoroethylene (PTFE) at 473 K using sodium metal. The porous carbon as-prepared had a large amount of narrow mesopores 2–3 nm in pore width, together with micropores. Control of the...

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Published inCarbon (New York) Vol. 41; no. 9; pp. 1759 - 1764
Main Authors Tanaike, Osamu, Hatori, Hiroaki, Yamada, Yoshio, Shiraishi, Soshi, Oya, Asao
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 2003
Elsevier Science
Subjects
A. Porous carbon
B. Heat treatment
C. Adsorption
Chemistry
Colloidal state and disperse state
D. Porosity
Exact sciences and technology
General and physical chemistry
Porous materials
A. Porous carbon
B. Heat treatment
D. Porosity
C. Adsorption
Heat treatment
Porosity
Adsorption
Carbon
Porous material
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Summary:Porous carbon having more than 2000 m 2/g of BET specific surface area was synthesized by defluorination of polytetrafluoroethylene (PTFE) at 473 K using sodium metal. The porous carbon as-prepared had a large amount of narrow mesopores 2–3 nm in pore width, together with micropores. Control of the pore structure was attempted by simple heat-treatment of the carbon in nitrogen, and change of the porous structures was characterized by nitrogen adsorption techniques. As a result, it was found that the ratio between micro- and mesopores was easily varied. Electric double layer capacitance was measured as one of the applications for the mesoporous carbon with specific porosity, and the effect of pore control on capacitance was investigated.
ISSN:0008-6223
1873-3891
DOI:10.1016/S0008-6223(03)00146-5