Growth and characterization of carbon nanotubes over CoFe<sub>2</sub>O<sub>4</sub>-MgO catalysts at different temperatures

Ateia, Ebtesam E.; Morsy, Mohamed; Ahmed, Eman M.; Soliman, Fatma S.

doi:10.1080/1536383x.2020.1767078

Cited by 5 publications

(3 citation statements)

References 42 publications

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“…5d ), the diameter of CNTs was distributed from less than 10 nm to 28 nm approximately, indicating that higher temperature tended to the growth of smaller diameter CNTs. The similar phenomenon was also reported by Ateia et al 36 …”

Section: Resultssupporting

confidence: 91%

“…It can also be observed that the average diameter of CNTs on Ni/M3 was about 33.01 nm, which was larger than 28.85 nm of Ni/M1 and 23.01 nm of Ni/M2. According to Ateia et al 36 and Mionic et al , 37 the larger size of metal particles resulted in the growth of larger diameter CNTs. From the results of XRD analysis, the average size of nickel particles on M3 was 18.04 nm which was the largest one of these samples.…”

Section: Resultsmentioning

confidence: 97%

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A novel purification method of activated carbon-supported carbon nanotubes using a mixture of Ca(OH)₂ and KOH as the ablation agent

Zhang

Guo

et al. 2021

RSC Adv.

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Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 97%

A novel purification method of activated carbon-supported carbon nanotubes using a mixture of Ca(OH)₂ and KOH as the ablation agent

Zhang

Guo

et al. 2021

RSC Adv.

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“…The technology can comprehensively evaluate the residual degree of non-oxidized residues at high temperature and the difference in combustion temperature of MWCNTs. 37 The oxidation temperatures of non-crystalline carbon and single-walled MWCNTs in the range of 200 °C to 300 °C and 350 °C to 500 °C have been reported.…”

Section: Resultsmentioning

confidence: 99%

Study of the growth parameters of multiwalled carbon nanotubes

et al. 2023

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Synthesis and characterization of hierarchical suspended carbon fiber structures decorated with carbon nanotubes

Nguyen,

Flores,

Madou

et al. 2024

J Mater Sci

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Carbon nanotubes (CNTs) and carbon microfibers (CMFs) have received significant attention due to their exceptional mechanical and electrical properties, which make them promising materials for various applications. This study introduces a novel approach to integrate CNTs and CMFs into a unified architecture by simultaneously conducting pyrolysis and chemical vapor deposition (CVD). The localized CVD of CNTs on suspended CMFs was achieved by utilizing Fe–Co nanoparticles (NPs) embedded in polyacrylonitrile (PAN) fibers as catalysts. Scanning electron microscopy and elemental analysis confirmed the formation of needle-like carbon structures on the pyrolyzed fiber surface, where carbon gases released from the pyrolyzing PAN fiber acted as the carbon source for the localized CVD. The incorporation of an additional carbon source, such as camphor vapor, significantly enhanced the growth and density of CNTs on the CMF. Various characterization techniques, including transmission electron microscopy, X-ray diffraction, Raman spectroscopy, and Atomic Force Microscopy, were employed to analyse the properties of the synthesized materials. The substantial increase in electrical conductivity upon incorporating CNTs highlights their positive influence on electrical properties and defect reduction. These characterization results highlight the potential applications of the fabricated structures in various fields, including sensors, lithium-ion electrodes, and microfabrication. In addition, the economic advantages of optimizing the process by integrating CVD with pyrolysis were assessed, revealing decreased operation time, lower energy consumption, and reduced chemical costs in comparison to conventional methods involving multiple intermediate processing steps. Graphical Abstract

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Growth and characterization of carbon nanotubes over CoFe₂O₄-MgO catalysts at different temperatures

Cited by 5 publications

References 42 publications

A novel purification method of activated carbon-supported carbon nanotubes using a mixture of Ca(OH)₂ and KOH as the ablation agent

A novel purification method of activated carbon-supported carbon nanotubes using a mixture of Ca(OH)₂ and KOH as the ablation agent

Study of the growth parameters of multiwalled carbon nanotubes

Synthesis and characterization of hierarchical suspended carbon fiber structures decorated with carbon nanotubes

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Growth and characterization of carbon nanotubes over CoFe2O4-MgO catalysts at different temperatures

Cited by 5 publications

References 42 publications

A novel purification method of activated carbon-supported carbon nanotubes using a mixture of Ca(OH)2 and KOH as the ablation agent

A novel purification method of activated carbon-supported carbon nanotubes using a mixture of Ca(OH)2 and KOH as the ablation agent

Study of the growth parameters of multiwalled carbon nanotubes

Synthesis and characterization of hierarchical suspended carbon fiber structures decorated with carbon nanotubes

Contact Info

Product

Resources

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Growth and characterization of carbon nanotubes over CoFe₂O₄-MgO catalysts at different temperatures

A novel purification method of activated carbon-supported carbon nanotubes using a mixture of Ca(OH)₂ and KOH as the ablation agent

A novel purification method of activated carbon-supported carbon nanotubes using a mixture of Ca(OH)₂ and KOH as the ablation agent