Flame-synthesis limits and self-catalytic behavior of carbon nanotubes using a double-faced wall stagnation flow burner

Woo, S.K.; Hong, Young Taik; Kwon, Oh Chae

doi:10.1016/j.combustflame.2009.07.003

Cited by 13 publications

(10 citation statements)

References 18 publications

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“…Here, we chose metal Ni as an interlayer considering its several inherent advantages [7-10]: (1) the linear expansion coefficient of Ni is very close to that of the hardmetal substrate; (2) Ni possesses favorable wettability with carbon nanostructures and thus catalyzes their nucleation and growth; and (3) Ni is hardly influenced by the temperature in combustion flame due to its outstanding heat resistance.…”

Section: Introductionmentioning

confidence: 99%

“…Many efforts have been made to improve the adhesion between the coating and the hardmetal substrate, the introduction of an interlayer was demonstrated as one of the most effective approaches to achieve this [ 5 , 6 ]. Here, we chose metal Ni as an interlayer considering its several inherent advantages [ 7 - 10 ]: (1) the linear expansion coefficient of Ni is very close to that of the hardmetal substrate; (2) Ni possesses favorable wettability with carbon nanostructures and thus catalyzes their nucleation and growth; and (3) Ni is hardly influenced by the temperature in combustion flame due to its outstanding heat resistance.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Flame synthesis of carbon nanostructures on Ni-plated hardmetal substrates

Zhu¹,

Kuang²,

Zhu³

et al. 2011

Nanoscale Res Lett

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In this article, we demonstrate that carbon nanostructures could be synthesized on the Ni-plated YG6 (WC-6 wt% Co) hardmetal substrate by a simple ethanol diffusion flame method. The morphologies and microstructures of the Ni-plated layer and the carbon nanostructures were examined by various techniques including scanning electron microscopy, X-ray diffraction, and Raman spectroscopy. The growth mechanism of such carbon nanostructures is discussed. This work may provide a strategy to improve the performance of hardmetal products and thus to widen their potential applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Flame synthesis of carbon nanostructures on Ni-plated hardmetal substrates

Zhu¹,

Kuang²,

Zhu³

et al. 2011

Nanoscale Res Lett

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“…The growth mechanism can vary depending on the carbon precursors, catalysts, and operation parameters. Three major steps are involved in the growth mechanism of the CNTs [36,37]: 1) catalytic deposition of the carbon precursor molecule on the surface of a metal catalyst; 2) diffusion of carbon atoms over the catalyst particle until supersaturation; 3) formation of hollow graphitic tubes. Nanocatalysts ensure better results, as the solubility of carbon precursors onto the catalysts increases with the surface area of the catalysts.…”

Section: Diffusion Flame Synthesismentioning

confidence: 99%

“…Notably, several computational and experimental studies have been performed to achieve a deeper understanding of the controlling parameters and growth mechanisms for premixed flame synthesis [36,56,65,[86][87][88][89][90]. On the basis of the above discussion, it can be concluded that the premixed flame synthesis of CNTs has several advantages over diffusion flame synthesis.…”

Section: Premixed Flame Synthesismentioning

confidence: 99%

Carbon nanotubes synthesis using diffusion and premixed flame methods: a review

Mittal¹,

Dhand²,

Rhee³

et al. 2015

Carbon letters

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In recent years, flame synthesis has absorbed a great deal of attention as a combustion method for the production of metal oxide nanoparticles, carbon nanotubes, and other related carbon nanostructures, over the existing conventional methods. Flame synthesis is an energyefficient, scalable, cost-effective, rapid and continuous process, where flame provides the necessary chemical species for the nucleation of carbon structures (feed stock or precursor) and the energy for the production of carbon nanostructures. The production yield can be optimized by altering various parameters such as fuel profile, equivalence ratio, catalyst chemistry and structure, burner configuration and residence time. In the present report, diffusion and premixed flame synthesis methods are reviewed to develop a better understanding of factors affecting the morphology, positioning, purity, uniformity and scalability for the development of carbon nanotubes along with their correlated carbonaceous derivative nanostructures.

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“…Single-walled CNT formation was observed using a premixed flame of acetylene/oxygen/15 mol % Ar at 6.7 kPa with Fe(CO) as a catalyst. An experiment performed by Woo et al (2009) used a doublefaced wall stagnation flow burner to study the formation of CNTs. Ethylene was used as a hydrocarbon fuel source, and two flows impinged on a flat stagnation wall where the substrate surfaces were coated with nickel.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Carbon Nanotubes Synthesized from Hydrocarbon-Rich Flame

Tan

Lee

et al. 2016

IJTech

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The present study focuses on the characterization of carbon nanotubes (CNTs) synthesized from flame under an atmospheric condition. A laminar flame burner was utilized to establish a rich premixed propane/air flame at the equivalence ratio  = 1.8-2.2. The flame was impinged on a stainless steel wire mesh coated with nickel (Ni) catalyst to grow CNTs. Distribution and yield of the CNTs on the substrate were quantified. Carbon nanotubes formed on the substrate were harvested and characterized using scanning electron microscopy (SEM), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDX), and thermogravimetric analysis (TGA). The FESEM micrograph showed that the CNTs produced were in disarray. The synthesized CNTs were an average of 50-60 nm in diameter while the length of the tubes was in the order of microns. TGA analysis showed that 75% of CNTs were present in the sample and the oxidation temperature was 510°C.

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Flame-synthesis limits and self-catalytic behavior of carbon nanotubes using a double-faced wall stagnation flow burner

Cited by 13 publications

References 18 publications

Flame synthesis of carbon nanostructures on Ni-plated hardmetal substrates

Flame synthesis of carbon nanostructures on Ni-plated hardmetal substrates

Carbon nanotubes synthesis using diffusion and premixed flame methods: a review

Characterization of Carbon Nanotubes Synthesized from Hydrocarbon-Rich Flame

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