Dimensional control of multi-walled carbon nanotubes in floating-catalyst CVD synthesis

McKee, Gregg S. B.; Deck, Christian P.; Vecchio, Kenneth S.

doi:10.1016/j.carbon.2009.03.060

Cited by 55 publications

(32 citation statements)

References 39 publications

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“…In order to reveal the morphology of deposited carbon and especially for the one that oxidized at 470°C, TEM images could be used ( Figure 12). The differences observed in the oxidation temperature of carbon nanotubes depends on several parameters such as diameter of the tubes [66][67], length of the tubes [68], percentage of metal loading used in the production of the nanotube [69][70]. The diversity of the deposited carbon structures in terms morphology (straight long filaments, highly entangled and curly shaped filaments, filaments with knuckle-like structure and carbon onions) can be another reason for the presence of two distinctive peaks in the derivative weight loss of spent Ni-Co/CeO 2 -700.…”

Section: Discussionmentioning

confidence: 99%

Dry reforming of methane over CeO2 supported Ni, Co and Ni–Co catalysts

Üner

2015

Applied Catalysis B: Environmental

347

157

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Section: Discussionmentioning

confidence: 99%

Dry reforming of methane over CeO2 supported Ni, Co and Ni–Co catalysts

Üner

2015

Applied Catalysis B: Environmental

347

157

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“…Such difference can probably be related to the size of the deposited catalyst nanoparticles. Iron mobility on substrate fibers is the key factor controlling diameter diversification [27] since other process parameters were the same for two kind of fibers. A higher iron mobility causes more agglomeration of nanoparticles, therefore leading to bigger nanoparticles and larger CNTs diameter.…”

Section: Morphology Of Carbon Nanotubesmentioning

confidence: 99%

Carbon and glass hierarchical fibers: Influence of carbon nanotubes on tensile, flexural and impact properties of short fiber reinforced composites

et al. 2013

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a b s t r a c tDense carbon nanotubes (CNTs) were grown uniformly on the surface of carbon fibers and glass fibers to create hierarchical fibers by use of floating catalyst chemical vapor deposition. Morphologies of the CNTs were investigated using scanning electronic microscope (SEM) and transmission electron microscope (TEM). Larger diameter dimension and distinct growing mechanism of nanotubes on glass fiber were revealed. Short carbon and glass fiber reinforced polypropylene composites were fabricated using the hierarchical fibers and compared with composites made using neat fibers. Tensile, flexural and impact properties of the composites were measured, which showed evident enhancement in all mechanical properties compared to neat short fiber composites. SEM micrographs of composite fracture surface demonstrated improved adhesion between CNT-coated fiber and the matrix. The enhanced mechanical properties of short fiber composites was attributed to the synergistic effects of CNTs in improving fiber-matrix interfacial properties as well as the CNTs acting as supplemental reinforcement in short fiber-composites.

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“…There are three operating conditions performed in this work, namely the catalyst percentage loading, duration of reaction, and reaction temperature as illustrated in Table 1. The variables ranges were selected based on the results obtained from the preliminary studies and the literature [21][22][23]. For three variables (n = 3), the total number of experiments were 20, which was determined by the expression 2 n (2 3 = 8 factorial points), 2n (2 × 3 = 6 axial points), six (centre points, six replications).…”

Section: Experimental Design Of the Cnts Synthesismentioning

confidence: 99%

Parameter Optimisation of Carbon Nanotubes Synthesis via Hexane Decomposition over Minerals Generated from Anadara granosa Shells as the Catalyst Support

Hussein

Zakarya

Sarijo

et al. 2012

Journal of Nanomaterials

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The synthesis of carbon nanotubes (CNTs) by the chemical vapour deposition (CVD) method using natural calcite from Anadara granosa shells as the metal catalyst support was studied. Hexane and iron (Fe) were used as the carbon precursor and the active component of the catalyst, respectively. Response surface methodology (RSM) based on central composite design (CCD) was used to optimise the effect of total iron loading, the duration of reaction, and reaction temperature. The optimal conditions were total iron loading of 7.5%, a reaction time of 45 min, and a temperature of 850 • C with a resulting carbon yield of 131.62%. Raman spectra, field-emission-scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) analyses showed that the CNTs were of the multiwalled type (MWNTs).

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Dimensional control of multi-walled carbon nanotubes in floating-catalyst CVD synthesis

Cited by 55 publications

References 39 publications

Dry reforming of methane over CeO2 supported Ni, Co and Ni–Co catalysts

Dry reforming of methane over CeO2 supported Ni, Co and Ni–Co catalysts

Carbon and glass hierarchical fibers: Influence of carbon nanotubes on tensile, flexural and impact properties of short fiber reinforced composites

Parameter Optimisation of Carbon Nanotubes Synthesis via Hexane Decomposition over Minerals Generated from Anadara granosa Shells as the Catalyst Support

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