Electronegative Promotion in the Synthesis by DC HF CCVD Growth Method of Carbon Nanotubes: A Review

Nyangono Kouma Jean Michel; Mane Mane Jeannot; Mengata Mengounou Ghislain; Moukouri Mikano Jonas; Asse Jean Bernard

doi:doi:10.11648/j.ajn.20210704.12

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Electronegative Promotion in the Synthesis by DC HF CCVD Growth Method of Carbon Nanotubes: A Review

Nyangono Kouma Jean Michel, Mane Mane Jeannot, Mengata Mengounou Ghislain, Moukouri Mikano Jonas, Asse Jean Bernard

Published in American Journal of Nanosciences (Volume 7, Issue 4)

Received: 29 August 2021 Accepted: 24 September 2021 Published: 10 November 2021

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Abstract

From the technological point of view, the synthesis of carbon nanotubes (CNTs) aims at optimizing their field emission properties. Among all the synthesis methods, the CVD method is the most suitable for the growth of carbon nanotubes. In this method, transition metal atoms (Fe, Ni, Co) are used. The carbon nanotubes obtained with these transition metals present some major defects associated with some rather complex purification conditions. Starting from the fact that the electronegative atom (oxygen) participates in the promotion of the adsorption of the alkenes on the dense faces of the transition metals, this leads to think that the deposition of oxygen on transition metal catalyst before the CVD synthesis would weaken the bond between the graphitic surfaces and the transition particles. The interaction of electronegative atoms (oxygen) with transition metal particles prior to the CVD process results in a removal of charge from the metal atoms that results in a change in the d-band surface density, thereby lowering the amount of charge density in the mixed catalyst formed. This charge density could have interacted further with donation, and retro-donation of the alkene and back to the alkyne atoms during and after the CVD process. This oxygen-transition metal interaction is described in the framework of the Dewar-Chatt- Duncanson (DCD) model. It is expected that the carbon nanotubes thus obtained will have minor defects, have a somewhat reduced height, be of better quality compared to those obtained without promotion and allow easier purification conditions, while considering a popcorn model to lift the catalyst particles by thermal stirring. The expected experimental results can be verified using surface analysis techniques such as vibrational spectroscopy through the shifts of the band transitions that occur, photoelectron spectroscopy for resonance line position shifts.

Published in	American Journal of Nanosciences (Volume 7, Issue 4)
DOI	10.11648/j.ajn.20210704.12
Page(s)	66-81
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2021. Published by Science Publishing Group

Keywords

Carbon Nanotube, Electronegative Promotion, DC HF CCVD Synthesis, DCD Model, Transition Metal

References

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Nyangono Kouma Jean Michel, Mane Mane Jeannot, Mengata Mengounou Ghislain, Moukouri Mikano Jonas, Asse Jean Bernard. (2021). Electronegative Promotion in the Synthesis by DC HF CCVD Growth Method of Carbon Nanotubes: A Review. American Journal of Nanosciences, 7(4), 66-81. https://doi.org/10.11648/j.ajn.20210704.12

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Nyangono Kouma Jean Michel; Mane Mane Jeannot; Mengata Mengounou Ghislain; Moukouri Mikano Jonas; Asse Jean Bernard. Electronegative Promotion in the Synthesis by DC HF CCVD Growth Method of Carbon Nanotubes: A Review. Am. J. Nanosci. 2021, 7(4), 66-81. doi: 10.11648/j.ajn.20210704.12

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Nyangono Kouma Jean Michel, Mane Mane Jeannot, Mengata Mengounou Ghislain, Moukouri Mikano Jonas, Asse Jean Bernard. Electronegative Promotion in the Synthesis by DC HF CCVD Growth Method of Carbon Nanotubes: A Review. Am J Nanosci. 2021;7(4):66-81. doi: 10.11648/j.ajn.20210704.12

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@article{10.11648/j.ajn.20210704.12,
  author = {Nyangono Kouma Jean Michel and Mane Mane Jeannot and Mengata Mengounou Ghislain and Moukouri Mikano Jonas and Asse Jean Bernard},
  title = {Electronegative Promotion in the Synthesis by DC HF CCVD Growth Method of Carbon Nanotubes: A Review},
  journal = {American Journal of Nanosciences},
  volume = {7},
  number = {4},
  pages = {66-81},
  doi = {10.11648/j.ajn.20210704.12},
  url = {https://doi.org/10.11648/j.ajn.20210704.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajn.20210704.12},
  abstract = {From the technological point of view, the synthesis of carbon nanotubes (CNTs) aims at optimizing their field emission properties. Among all the synthesis methods, the CVD method is the most suitable for the growth of carbon nanotubes. In this method, transition metal atoms (Fe, Ni, Co) are used. The carbon nanotubes obtained with these transition metals present some major defects associated with some rather complex purification conditions. Starting from the fact that the electronegative atom (oxygen) participates in the promotion of the adsorption of the alkenes on the dense faces of the transition metals, this leads to think that the deposition of oxygen on transition metal catalyst before the CVD synthesis would weaken the bond between the graphitic surfaces and the transition particles. The interaction of electronegative atoms (oxygen) with transition metal particles prior to the CVD process results in a removal of charge from the metal atoms that results in a change in the d-band surface density, thereby lowering the amount of charge density in the mixed catalyst formed. This charge density could have interacted further with donation, and retro-donation of the alkene and back to the alkyne atoms during and after the CVD process. This oxygen-transition metal interaction is described in the framework of the Dewar-Chatt- Duncanson (DCD) model. It is expected that the carbon nanotubes thus obtained will have minor defects, have a somewhat reduced height, be of better quality compared to those obtained without promotion and allow easier purification conditions, while considering a popcorn model to lift the catalyst particles by thermal stirring. The expected experimental results can be verified using surface analysis techniques such as vibrational spectroscopy through the shifts of the band transitions that occur, photoelectron spectroscopy for resonance line position shifts.},
 year = {2021}
}

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TY  - JOUR
T1  - Electronegative Promotion in the Synthesis by DC HF CCVD Growth Method of Carbon Nanotubes: A Review
AU  - Nyangono Kouma Jean Michel
AU  - Mane Mane Jeannot
AU  - Mengata Mengounou Ghislain
AU  - Moukouri Mikano Jonas
AU  - Asse Jean Bernard
Y1  - 2021/11/10
PY  - 2021
N1  - https://doi.org/10.11648/j.ajn.20210704.12
DO  - 10.11648/j.ajn.20210704.12
T2  - American Journal of Nanosciences
JF  - American Journal of Nanosciences
JO  - American Journal of Nanosciences
SP  - 66
EP  - 81
PB  - Science Publishing Group
SN  - 2575-4858
UR  - https://doi.org/10.11648/j.ajn.20210704.12
AB  - From the technological point of view, the synthesis of carbon nanotubes (CNTs) aims at optimizing their field emission properties. Among all the synthesis methods, the CVD method is the most suitable for the growth of carbon nanotubes. In this method, transition metal atoms (Fe, Ni, Co) are used. The carbon nanotubes obtained with these transition metals present some major defects associated with some rather complex purification conditions. Starting from the fact that the electronegative atom (oxygen) participates in the promotion of the adsorption of the alkenes on the dense faces of the transition metals, this leads to think that the deposition of oxygen on transition metal catalyst before the CVD synthesis would weaken the bond between the graphitic surfaces and the transition particles. The interaction of electronegative atoms (oxygen) with transition metal particles prior to the CVD process results in a removal of charge from the metal atoms that results in a change in the d-band surface density, thereby lowering the amount of charge density in the mixed catalyst formed. This charge density could have interacted further with donation, and retro-donation of the alkene and back to the alkyne atoms during and after the CVD process. This oxygen-transition metal interaction is described in the framework of the Dewar-Chatt- Duncanson (DCD) model. It is expected that the carbon nanotubes thus obtained will have minor defects, have a somewhat reduced height, be of better quality compared to those obtained without promotion and allow easier purification conditions, while considering a popcorn model to lift the catalyst particles by thermal stirring. The expected experimental results can be verified using surface analysis techniques such as vibrational spectroscopy through the shifts of the band transitions that occur, photoelectron spectroscopy for resonance line position shifts.
VL  - 7
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Author Information

Nyangono Kouma Jean Michel

Laboratory of Computer and Automatic Engineering, Advanced Teachers’ Training College for Technical Education (ENSET), University of Douala, Douala, Cameroon
Mane Mane Jeannot

Department of Mathematics and Physical Sciences, National Advanced School of Engineering, University of Yaoundé I, Yaoundé, Cameroon
Mengata Mengounou Ghislain

Laboratory of Technology and Applied Science, University Institute of Technology, University of Douala, Douala, Cameroon
Moukouri Mikano Jonas

Basical Scientific Teachings (ESB) Department, Advanced Teachers’ Training College for Technical Education (ENSET), University of Douala, Douala, Cameroon
Asse Jean Bernard

Laboratory of Technology and Applied Science, University Institute of Technology, University of Douala, Douala, Cameroon

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Nyangono Kouma Jean Michel, Mane Mane Jeannot, Mengata Mengounou Ghislain, Moukouri Mikano Jonas, Asse Jean Bernard. (2021). Electronegative Promotion in the Synthesis by DC HF CCVD Growth Method of Carbon Nanotubes: A Review. American Journal of Nanosciences, 7(4), 66-81. https://doi.org/10.11648/j.ajn.20210704.12

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Nyangono Kouma Jean Michel; Mane Mane Jeannot; Mengata Mengounou Ghislain; Moukouri Mikano Jonas; Asse Jean Bernard. Electronegative Promotion in the Synthesis by DC HF CCVD Growth Method of Carbon Nanotubes: A Review. Am. J. Nanosci. 2021, 7(4), 66-81. doi: 10.11648/j.ajn.20210704.12

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Nyangono Kouma Jean Michel, Mane Mane Jeannot, Mengata Mengounou Ghislain, Moukouri Mikano Jonas, Asse Jean Bernard. Electronegative Promotion in the Synthesis by DC HF CCVD Growth Method of Carbon Nanotubes: A Review. Am J Nanosci. 2021;7(4):66-81. doi: 10.11648/j.ajn.20210704.12

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@article{10.11648/j.ajn.20210704.12,
  author = {Nyangono Kouma Jean Michel and Mane Mane Jeannot and Mengata Mengounou Ghislain and Moukouri Mikano Jonas and Asse Jean Bernard},
  title = {Electronegative Promotion in the Synthesis by DC HF CCVD Growth Method of Carbon Nanotubes: A Review},
  journal = {American Journal of Nanosciences},
  volume = {7},
  number = {4},
  pages = {66-81},
  doi = {10.11648/j.ajn.20210704.12},
  url = {https://doi.org/10.11648/j.ajn.20210704.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajn.20210704.12},
  abstract = {From the technological point of view, the synthesis of carbon nanotubes (CNTs) aims at optimizing their field emission properties. Among all the synthesis methods, the CVD method is the most suitable for the growth of carbon nanotubes. In this method, transition metal atoms (Fe, Ni, Co) are used. The carbon nanotubes obtained with these transition metals present some major defects associated with some rather complex purification conditions. Starting from the fact that the electronegative atom (oxygen) participates in the promotion of the adsorption of the alkenes on the dense faces of the transition metals, this leads to think that the deposition of oxygen on transition metal catalyst before the CVD synthesis would weaken the bond between the graphitic surfaces and the transition particles. The interaction of electronegative atoms (oxygen) with transition metal particles prior to the CVD process results in a removal of charge from the metal atoms that results in a change in the d-band surface density, thereby lowering the amount of charge density in the mixed catalyst formed. This charge density could have interacted further with donation, and retro-donation of the alkene and back to the alkyne atoms during and after the CVD process. This oxygen-transition metal interaction is described in the framework of the Dewar-Chatt- Duncanson (DCD) model. It is expected that the carbon nanotubes thus obtained will have minor defects, have a somewhat reduced height, be of better quality compared to those obtained without promotion and allow easier purification conditions, while considering a popcorn model to lift the catalyst particles by thermal stirring. The expected experimental results can be verified using surface analysis techniques such as vibrational spectroscopy through the shifts of the band transitions that occur, photoelectron spectroscopy for resonance line position shifts.},
 year = {2021}
}

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TY  - JOUR
T1  - Electronegative Promotion in the Synthesis by DC HF CCVD Growth Method of Carbon Nanotubes: A Review
AU  - Nyangono Kouma Jean Michel
AU  - Mane Mane Jeannot
AU  - Mengata Mengounou Ghislain
AU  - Moukouri Mikano Jonas
AU  - Asse Jean Bernard
Y1  - 2021/11/10
PY  - 2021
N1  - https://doi.org/10.11648/j.ajn.20210704.12
DO  - 10.11648/j.ajn.20210704.12
T2  - American Journal of Nanosciences
JF  - American Journal of Nanosciences
JO  - American Journal of Nanosciences
SP  - 66
EP  - 81
PB  - Science Publishing Group
SN  - 2575-4858
UR  - https://doi.org/10.11648/j.ajn.20210704.12
AB  - From the technological point of view, the synthesis of carbon nanotubes (CNTs) aims at optimizing their field emission properties. Among all the synthesis methods, the CVD method is the most suitable for the growth of carbon nanotubes. In this method, transition metal atoms (Fe, Ni, Co) are used. The carbon nanotubes obtained with these transition metals present some major defects associated with some rather complex purification conditions. Starting from the fact that the electronegative atom (oxygen) participates in the promotion of the adsorption of the alkenes on the dense faces of the transition metals, this leads to think that the deposition of oxygen on transition metal catalyst before the CVD synthesis would weaken the bond between the graphitic surfaces and the transition particles. The interaction of electronegative atoms (oxygen) with transition metal particles prior to the CVD process results in a removal of charge from the metal atoms that results in a change in the d-band surface density, thereby lowering the amount of charge density in the mixed catalyst formed. This charge density could have interacted further with donation, and retro-donation of the alkene and back to the alkyne atoms during and after the CVD process. This oxygen-transition metal interaction is described in the framework of the Dewar-Chatt- Duncanson (DCD) model. It is expected that the carbon nanotubes thus obtained will have minor defects, have a somewhat reduced height, be of better quality compared to those obtained without promotion and allow easier purification conditions, while considering a popcorn model to lift the catalyst particles by thermal stirring. The expected experimental results can be verified using surface analysis techniques such as vibrational spectroscopy through the shifts of the band transitions that occur, photoelectron spectroscopy for resonance line position shifts.
VL  - 7
IS  - 4
ER  -

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