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  • P-ISSN 1225-0163
  • E-ISSN 2288-8985

Surface analysis of rayon-based carbon nanofibers and activated carbon fibers

Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2007, v.20 no.4, pp.296-301




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Abstract

Carbon nanofibers (CNFs) are non-microporous materials with a high surface area (<TEX>$100{\sim}200m^2/g$</TEX>) and high purity. Therefore, the material has a high potential for use as catalyst support. Activated carbon fibers (ACFs) are of increasing concern with regard to the levels of toxic air pollutants emitted from high-technology industry. Rayon-based CNFs and ACFs was subjected to thermal oxidation under a wide variety of temperature and air conditions to modify the surface properties. Rayon-based CNFs and ACFs were prepared by using thermal chemistry. CNFs were synthesized at temperatures above <TEX>$600^{\circ}C$</TEX> in an air atmosphere and grew with increased temperature and air conditions. After heating at <TEX>$800^{\circ}C$</TEX> for 72 hr, carbonized rayon with ACFs had <TEX>$2,662m^2/g$</TEX> (BET) of surface area and <TEX>$1.41cm^3/g$</TEX> of pore volume. The resulting ACFs had a 99% surface area in which pore size was 10 nm or less, and a 60 % surface area in which pore size was 2 nm or less.

keywords
Activated carbon fibers, carbon nanofibers, rayon


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