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논문 기본 정보

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동향자료
저자정보
Obasogie, Oyema E. (Chemical Engineering Department, Federal University of Technology) Abdulkareem, Ambali S. (Chemical Engineering Department, Federal University of Technology) Mohammed, Is'haq A. (Chemical Engineering Department, Federal University of Technology) Bankole, Mercy T. (Nanotechnology Group, Centre for Genetic Engineering and Biotechnology [CGEB], Federal University of Technology) Tijani, Jimoh. O. (Nanotechnology Group, Centre for Genetic Engineering and Biotechnology [CGEB], Federal University of Technology) Abubakre, Oladiran K. (Nanotechnology Group, Centre for Genetic Engineering and Biotechnology [CGEB], Federal University of Technology)
저널정보
한국탄소학회 Carbon letters Carbon letters 제28권
발행연도
2018.1
수록면
72 - 80 (9page)

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In this study, an empirical relationship between the energy band gap of multi-walled carbon nanotubes (MWCNTs) and synthesis parameters in a chemical vapor deposition (CVD) reactor using factorial design of experiment was established. A bimetallic (Fe-Ni) catalyst supported on $CaCO_3$ was synthesized via wet impregnation technique and used for MWCNT growth. The effects of synthesis parameters such as temperature, time, acetylene flow rate, and argon carrier gas flow rate on the MWCNTs energy gap, yield, and aspect ratio were investigated. The as-prepared supported bimetallic catalyst and the MWCNTs were characterized for their morphologies, microstructures, elemental composition, thermal profiles and surface areas by high-resolution scanning electron microscope, high resolution transmission electron microscope, energy dispersive X-ray spectroscopy, thermal gravimetry analysis and Brunauer-Emmett-Teller. A regression model was developed to establish the relationship between band gap energy, MWCNTs yield and aspect ratio. The results revealed that the optimum conditions to obtain high yield and quality MWCNTs of 159.9% were: temperature ($700^{\circ}C$), time (55 min), argon flow rate ($230.37mL\;min^{-1}$) and acetylene flow rate ($150mL\;min^{-1}$) respectively. The developed regression models demonstrated that the estimated values for the three response variables; energy gap, yield and aspect ratio, were 0.246 eV, 557.64 and 0.82. The regression models showed that the energy band gap, yield, and aspect ratio of the MWCNTs were largely influenced by the synthesis parameters and can be controlled in a CVD reactor.

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