Synthesis of carbon nanotubes by CCVD of natural gas using hydrotreating catalysts

Awadallah, Ahmed E.; Abdel‐Hamid, S. M.; El-Desouki, Doaa S.; Aboul-Enein, Ateyya A.; Aboul-Gheit, Ahmed K.

doi:10.1016/j.ejpe.2012.11.005

Cited by 21 publications

(7 citation statements)

References 37 publications

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“…Based on Scherrer’s equation, the crystal size of TiO 2 was 9.85 nm. Additional two peaks at 26.0° and 43.6° were attributed to {002} and {100} facets of hexagonal graphite structure of MWCNTs [ 33 ] of calculated crystal size 36.17 nm. According to Wen et al [ 34 ], the number of walls of MWCNTs was estimated to be 11.…”

Section: Resultsmentioning

confidence: 99%

“…The sample was dried at 120 °C in oven and annealed at 450 °C to induce the phase transformation to crystalline anatase TiO 2 while retaining the structural integrity of the CNTs [ 52 ]. Remarkably, the multi-walled carbon nanotubes (MWCNTs), have been synthesized via the Catalytic Chemical Vapor Deposition (CCVD) process [ 33 ]. To avoid nanoparticles agglomeration, MWCNTs were purified before through washing by strong acid (37% HCL, Aldrich).…”

Section: Methodsmentioning

confidence: 99%

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Effect of Novel Quercetin Titanium Dioxide-Decorated Multi-Walled Carbon Nanotubes Nanocomposite on Bacillus subtilis Biofilm Development

et al. 2018

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The present work was targeted to design a surface against cell seeding and adhering of bacteria, Bacillus subtilis. A multi-walled carbon nanotube/titanium dioxide nano-power was produced via simple mixing of carbon nanotube and titanium dioxide nanoparticles during the sol-gel process followed by heat treatment. Successfully, quercetin was immobilized on the nanocomposite via physical adsorption to form a quercetin/multi-walled carbon nanotube/titanium dioxide nanocomposite. The adhesion of bacteria on the coated-slides was verified after 24 h using confocal laser-scanning microscopy. Results indicated that the quercetin/multi-walled carbon nanotube/titanium dioxide nanocomposite had more negativity and higher recovery by glass surfaces than its counterpart. Moreover, coating surfaces with the quercetin-modified nanocomposite lowered both hydrophilicity and surface-attached bacteria compared to surfaces coated with the multi-walled carbon nanotubes/titanium dioxide nanocomposite.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Effect of Novel Quercetin Titanium Dioxide-Decorated Multi-Walled Carbon Nanotubes Nanocomposite on Bacillus subtilis Biofilm Development

et al. 2018

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“…In this report, it was found that the Ni catalyst showed a methane conversion rate of 42%. Mendoza et al 2005 51 synthesized MWCNT using a catalytic CVD process, and reported the influence of Co. Awadallah et al 2012 26 synthesized CNTs by a CVD process using Ni-Mo-Al and Co-Mo-Al. In this report, the author has concluded that the Ni-Mo-Al catalyst gave higher purity of CNTs compared to the Co-Mo-Al catalyst.…”

Section: Introductionmentioning

confidence: 99%

Carbon nanotubes, nanorings, and nanospheres: Synthesis and fabrication via chemical vapor deposition—a review

Sivamaran¹,

Balasubramanian

Gopalakrishnan

et al. 2022

Nanomaterials and Nanotechnology

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Research work published since 2010 on the synthesis of carbon nanotubes (CNTs), carbon nanorings (CNRs), and carbon nanospheres (CNSs) using the chemical vapor deposition (CVD) process is reviewed. The effect of CVD process parameters on carbon nanomaterials morphology, such as diameter, yield, and quality was reviewed. The mechanism of CVD formation and growth of carbon nanomaterials was reviewed in detail. The catalyst materials used to synthesize these carbon allotropies were discussed in detail. The formation mechanism of carbon nanomaterials indicates that the variables of the CVD process parameters that appear to control growth are not directly manipulated in the CVD process. Rather, it is determined by complex interactions between variables. The impact of CNTs, CNRs, and CNSs was discussed using the schematic representation. The researchers who published the articles in the CNTs, CNRs, and CNSs for the past decade were discussed. From the intensive literature review, it was found that as compared to CNTs there is not much research was undertaken in synthesizing spheres and rings. But spheres and rings are capable of performing better than CNTs structure in energy storage, and sensors.

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“…Schematic representation of GSCVD experimental setup used by Awadallah et al[54] for synthesis of CNT. GSCVD, gas source chemical vapor deposition; CNT, carbon nanotube.…”

mentioning

confidence: 99%

Carbon Nanotube Fabrication at Industrial Scale

Sengupta¹

2018

Handbook of Nanomaterials for Industrial Applications

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Synthesis of carbon nanotubes by CCVD of natural gas using hydrotreating catalysts

Cited by 21 publications

References 37 publications

Effect of Novel Quercetin Titanium Dioxide-Decorated Multi-Walled Carbon Nanotubes Nanocomposite on Bacillus subtilis Biofilm Development

Effect of Novel Quercetin Titanium Dioxide-Decorated Multi-Walled Carbon Nanotubes Nanocomposite on Bacillus subtilis Biofilm Development

Carbon nanotubes, nanorings, and nanospheres: Synthesis and fabrication via chemical vapor deposition—a review

Carbon Nanotube Fabrication at Industrial Scale

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