The use of organometallic transition metal complexes in the synthesis of shaped carbon nanomaterials

Nyamori, Vincent O.; Mhlanga, Sabelo D.; Coville, Neil J.

doi:10.1016/j.jorganchem.2008.04.003

Cited by 75 publications

(40 citation statements)

References 184 publications

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“…It was previously shown that hydrogen is necessary to create MWCNTs but for a concentration higher than 23-27 vol%, the formation of carbon nanotubes is inhibited [25,26]. Our N 2 /H 2 ratio was equal to 33/67 (vol%).…”

Section: 4mentioning

confidence: 60%

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Iron deposition on multi‐walled carbon nanotubes by fluidized bed MOCVD for aeronautic applications

Lassègue¹,

Noé

Monthioux

et al. 2015

Phys. Status Solidi C

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The fluidized bed MOCVD process has been studied in order to uniformly deposit iron nanoparticles on the outer surface of multi‐walled carbon nanotubes (MWCNTs) tangled in balls of 388 µm in diameter. Using ferrocene as organometallic precursor at atmospheric pressure, various reactive atmospheres of deposition (under N2, air and H2) and an ozone O3 surface pre‐treatment of MWCNTs were tested. Around 10 g Fe/100 g MWNCTs were deposited during each run. Under N2 at 650 °C on the raw MWCNTs, nanoparticles formed of Fe and Fe3C were deposited which have catalyzed the formation of carbon nanofibers (CNFs). 20 h of ozone (O3) pre‐treatment improved the number and distribution of iron nanoparticles but without increasing the surface coverage of nanotubes. A more intense amorphous carbon deposit also appeared. Under H2 at 550 °C, the amorphous carbon was partly eliminated but fewer iron nanoparticles were present. Under air at 450 °C, a part of the MWCNTs was lost and a Fe2O3 shell covered each remaining MWCNTs ball. New works are in progress to increase more markedly the surface reactivity of MWCNTs and to deposit pure iron. (© 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Section: 4mentioning

confidence: 60%

“…This precursor is also known to form carbon nanotubes [23,24], but this formation can be controlled by modifying the reactive atmosphere. The addition of H 2 is known to highly limit the formation of carbon products [25,26]. As previously said, Philippe [21] has succeeded in depositing pure iron oxide films using ferrocene under N 2 +air.…”

mentioning

confidence: 99%

Iron deposition on multi‐walled carbon nanotubes by fluidized bed MOCVD for aeronautic applications

Lassègue¹,

Noé

Monthioux

et al. 2015

Phys. Status Solidi C

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“…Nyamori et al propose that carbon species derived from C 5 H 5 or CO ligands, such as those present in (C 5 H 5 ) 2 Fe 2 (CO) 4 , will break down into free carbon (C 1 ) or similar small carbon radicals (C·) [50]. Other studies have shown that carbonyl groups will be lost in the through decomposition, shown for iron pentacarbonyl [51].…”

Section: ° C)mentioning

confidence: 99%

Decoration of multiwalled carbon nanotubes with protected iron nanoparticles

McCafferty

Stolojan

King

et al. 2015

Carbon

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“…The prepared catalyst was analyzed by XRD analysis in order to identify the active oxide phases which may contribute to catalytic activity. The type of metal oxide in the catalyst is one of the factors that influence the catalytic activity and morphology of the deposited carbon [18] in the synthesis of GNR. The XRD spectrum in Figure 8 showed that the degree of crystallinity of the catalyst was very high.…”

Section: Gnr Characterizationmentioning

confidence: 99%

Synthesis of Y‐Tip Graphitic Nanoribbons from Alcohol Catalytic Chemical Vapor Deposition on Piezoelectric Substrate

Yunusa

Rashid

Hamidon

et al. 2015

Journal of Nanomaterials

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We report the synthesis of Graphitic Nanoribbons (GNRs) using Alcohol Catalytic Chemical Vapor Deposition (ACCVD). Bulk GNR was synthesized directly on a piezoelectric substrate using one-step ACCVD. The synthesized GNRs were characterized by X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), Transmission Electron Microscope (TEM), Energy Dispersive X-Ray (EDX), Atomic Force Microscopy (AFM), and Raman spectroscopy. The characterization results showed Y-tip morphology of bulk and filamentous as-grown GNR having varying width that lies between tens and hundreds of nm and length of several microns. Based on the thickness obtained from the AFM and the analysis from the Raman spectroscopy, it was concluded that the synthesized GNRs are multiple-layered and graphitic in nature. With the direct synthesis of GNR on a piezoelectric substrate, it could have applications in the sensor industries, while the Y-tip GNR could have potentialities in semiconductor applications.

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The use of organometallic transition metal complexes in the synthesis of shaped carbon nanomaterials

Cited by 75 publications

References 184 publications

Iron deposition on multi‐walled carbon nanotubes by fluidized bed MOCVD for aeronautic applications

Iron deposition on multi‐walled carbon nanotubes by fluidized bed MOCVD for aeronautic applications

Decoration of multiwalled carbon nanotubes with protected iron nanoparticles

Synthesis of Y‐Tip Graphitic Nanoribbons from Alcohol Catalytic Chemical Vapor Deposition on Piezoelectric Substrate

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