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Facile tuning of carbon nanotube morphologies via residual carbon control during catalyst preparation stage

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2021, 31(4), pp.809-819
  • DOI : 10.1007/s42823-020-00213-2
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : November 5, 2020
  • Accepted : December 5, 2020
  • Published : August 1, 2021

Kim Sumin 1 Gang In Ji 1 Park Young Soo 2 HAN, Jonghun 1

1전남대학교
2탄소산업진흥원

Accredited

ABSTRACT

In this study, Fe–Mo–MgO catalysts for the synthesis of carbon nanotubes (CNTs) were prepared using the combustion method and CNTs were synthesized through catalytic chemical vapor deposition. The combustion time was controlled to 0.5, 1, 2, 3, 5, 10, and 24 h in the catalyst preparation stage. The residual carbon contents after the combustion stage and the morphologies of synthesized CNTs were also analyzed. The diameter, yield, and crystallinity of the synthesized CNTs were found to remarkably vary according to the combustion time in the catalyst preparation process. The amount of residual carbon in the catalyst considerably afects the purity, crystallinity, diameter and its distribution, and wall number of CNTs. Based on the yield and crystallinity, CNTs synthesized using the catalyst with a combustion time of 3 h were determined to be the most appropriate for application in feld emitters

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