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Synthesis of carbon nanotubes on silicalite-1-coated biomorphic materials

Abstract

The effect of the metal catalyst used in the synthesis of carbon nanotubes (CNTs) on biomorphic carbon materials (BCMs) coated with silicalite-1 was investigated in this study. BCMs with a hexagonal honeycomb structure and a pore size of 20–35 μm were prepared by carbonizing cypress in an Ar atmosphere. Then, silicalite-1 crystals were synthesized and uniformly coated on the BCMs through an in situ hydrothermal process. The CNTs were synthesized and grown by the chemical vapor deposition of acetylene (C2H2) in and outside the pores of catalyst Co, Fe, Ni, and Cu nanoparticles supported in the BCMs. The improved yield and crystallinity of CNTs were evaluated according to the catalyst particles. CNTs with inner and outer diameters of 7.67 and 21.81 nm, respectively, were used, and the synthesis at 650 °C for 120 min with Co nanoparticles led to a yield of 11.10%, and the ID/IG of 1.05 of CNTs was obtained.

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Acknowledgements

This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Education (201800790001).

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Correspondence to Ik Jin Kim.

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Park, J.G., Han, YH. & Kim, I.J. Synthesis of carbon nanotubes on silicalite-1-coated biomorphic materials. J. Korean Ceram. Soc. (2021). https://doi.org/10.1007/s43207-021-00123-7

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Keywords

  • Carbon nanotubes
  • Biomorphic materials
  • Silicalite-1
  • Metal catalyst
  • Yield