Carbon letters

  • Volume 21
  • /
  • Pages.33-50
  • /
  • 2017
  • /
  • 1976-4251(pISSN)
  • /
  • 2233-4998(eISSN)
Korean Carbon Society (한국탄소학회)
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Synthesize multi-walled carbon nanotubes via catalytic chemical vapour deposition method on Fe-Ni bimetallic catalyst supported on kaolin

  • Aliyu, A (Department of Chemical Engineering, Federal University of Technology Minna) ;
  • Abdulkareem, AS (Department of Chemical Engineering, Federal University of Technology Minna) ;
  • Kovo, AS (Department of Chemical Engineering, Federal University of Technology Minna) ;
  • Abubakre, OK (Department of Chemical Engineering, Federal University of Technology Minna) ;
  • Tijani, JO (Nanotechnology Research Group, Center for Genetic Engineering and Biotechnology, Federal University of Technology Minna) ;
  • Kariim, I (Department of Chemical Engineering, Federal University of Technology Minna)
  • Received : 2016.08.23
  • Accepted : 2016.10.06
  • Published : 2017.01.31
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Abstract

In this study, Fe-Ni bimetallic catalyst supported on kaolin is prepared by a wet impregnation method. The effects of mass of kaolin support, pre-calcination time, pre-calcination temperature and stirring speed on catalyst yields are examined. Then, the optimal supported Fe-Ni catalyst is utilised to produce multi-walled carbon nanotubes (MWCNTs) using catalytic chemical vapour deposition (CCVD) method. The catalysts and MWCNTs prepared using the optimal conditions are characterized using high resolution transmission electron microscope (HRTEM), high-resolution scanning electron microscope (HRSEM), electron diffraction spectrometer (EDS), selected area electron diffraction (SAED), thermogravimetric analysis (TGA), Brunauer-Emmett-Teller (BET), and X-ray diffraction (XRD). The XRD/EDS patterns of the prepared catalyst confirm the formation of a purely crystalline ternary oxide ($NiFe_2O_4$). The statistical analysis of the variance demonstrates that the combined effects of the reaction temperature and acetylene flow rate predominantly influenced the MWCNT yield. The $N_2$ adsorption (BET) and TGA analyses reveal high surface areas and thermally stable MWCNTs. The HRTEM/HRSEM micrographs confirm the formation of tangled MWCNTs with a particle size of less than 62 nm. The XRD patterns of the MWCNTs reveal the formation of a typical graphitized carbon. This study establishes the production of MWCNTs from a bi-metallic catalyst supported on kaolin.

Keywords

References

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  1. Controlled Syntheses of Multi-walled Carbon Nanotubes from Bimetallic Fe–Co Catalyst Supported on Kaolin by Chemical Vapour Deposition Method pp.2191-4281, 2019, https://doi.org/10.1007/s13369-018-03696-4