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Pore structures of multi-walled carbon nanotubes activated by air, CO2 and KOH

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Abstract

Multi-walled carbon nanotubes (MWNTs) synthesized by the catalytic decomposition of benzene were activated by KOH, CO2 or air. The adsorption isotherms of the activated MWNTs were analyzed and their pore size distributions were obtained. The results showed that the specific surface areas of the MWNTs activated by KOH, CO2 and air were increased to 785 m2/g, 429 m2/g and 270 m2/g, respectively. The MWNTs activated by KOH were rich in micropores and mesopores, especially high mesopores having volumes up to 1.04 cm3/g. The CO2-activated MWNTs also had many micropores while the air-activated MWNTs had a much smaller micropore volume. The morphologies of the activated MWNTs were examined by transmission electron microscopy and high resolution transmission electron microscopy, and the activation mechanisms were discussed.

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Authors and Affiliations

  1. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, P.R. China

    Yong Chen, Chang Liu, Feng Li & Hui-Ming Cheng

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  1. Yong Chen
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  2. Chang Liu
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  3. Feng Li
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  4. Hui-Ming Cheng
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Correspondence to Hui-Ming Cheng.

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Chen, Y., Liu, C., Li, F. et al. Pore structures of multi-walled carbon nanotubes activated by air, CO2 and KOH. J Porous Mater 13, 141–146 (2006). https://doi.org/10.1007/s10934-006-7017-6

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  • DOI: https://doi.org/10.1007/s10934-006-7017-6

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