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High yield purification of carbon nanotubes with H2S-O2 mixture

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A high yield purification method was developed for multi- and single-walled carbon nanotubes, combining both the gas-phase purification using H2S and O2 mixture to remove impurity carbon particles and the acid treatment to remove metal particles. For the purification of MWNTs, the purification yield was about 54%, much higher than the yield previously reported. For the SWNTs, the combined liquid-gas purification process resulted in a high purity of >95% and a high yield of 20–50%, depending on the quality of raw material. Hydrogen sulfide played a role of enhancing the removal of carbon particles as well as suppressing the oxidation of carbon nanotubes. Overall, the purification method developed in this work is simple and quite effective for removing unwanted carbon and metal particles out of MWNTs and SWNTs.

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Author notes

  1. Tak Jeong

    Present address: LG Innotek, 78-1 Jangduk-dong, Kwangsan-gu, 506-251, Kwangju, Korea

Authors and Affiliations

  1. School of Chemical Engineering and Technology, Semiconductor Physics Research Center, Chonbuk National University, 561-756, Chonju, Korea

    Tak Jeong, Tae Hee Kim, Wan-Young Kim, Kuk-Haeng Lee & Yoon-Bong Hahn

  2. School of Science and Technology, Chonbuk National University, 561-756, Chonju, Korea

    Kuk-Haeng Lee

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  1. Tak Jeong
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  2. Tae Hee Kim
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  3. Wan-Young Kim
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  4. Kuk-Haeng Lee
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  5. Yoon-Bong Hahn
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Correspondence to Yoon-Bong Hahn.

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Jeong, T., Kim, T.H., Kim, WY. et al. High yield purification of carbon nanotubes with H2S-O2 mixture. Korean J. Chem. Eng. 19, 519–523 (2002). https://doi.org/10.1007/BF02697166

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  • DOI: https://doi.org/10.1007/BF02697166

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