Synthesize multi-walled carbon nanotubes via catalytic chemical vapour deposition method on Fe-Ni bimetallic catalyst supported on kaolin

서지정보

· 발행기관 : 한국탄소학회
· 수록지 정보 : Carbon Letters / 21권
· 저자명 : Aliyu A, Abdulkareem AS, Kovo AS, Abubakre OK, Tijani JO, Kariim I

목차

1. Introduction
2 Experimental
3. Results and Discussion
4. Conclusions
References

영어초록

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 (NiFe2O4). 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 N2 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.

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