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http://dx.doi.org/10.5806/AST.2007.20.4.296

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

Kim, Youn Jung (Department of Applied Chemistry, Andong National University)
Ryu, Sang Hoon (Center for Scientific Instruments, Andong National University)
Lim, Woo Taik (Department of Applied Chemistry, Andong National University)
Choi, Sik Young (Department of Applied Chemistry, Andong National University)
Publication Information
Analytical Science and Technology / v.20, no.4, 2007 , pp. 296-301 More about this Journal
Abstract
Carbon nanofibers (CNFs) are non-microporous materials with a high surface area ($100{\sim}200m^2/g$) 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 $600^{\circ}C$ in an air atmosphere and grew with increased temperature and air conditions. After heating at $800^{\circ}C$ for 72 hr, carbonized rayon with ACFs had $2,662m^2/g$ (BET) of surface area and $1.41cm^3/g$ 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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