Optimization of carbon nanotube powder growth using low pressure floating catalytic chemical vapor deposition

Chen, Y.; Sun, Zhenrong; Li, Y.N.; Tay, Beng Kang

doi:10.1016/j.matchemphys.2005.09.017

Cited by 21 publications

(13 citation statements)

References 16 publications

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“…5a broad peaks at 1358 and 1583 cm À1 correspond to D and G-bands, respectively, as reported in the literature [17]. These Raman lines fall within the expected range as reported by others [18]. CNTs synthesized from ferrocene show a weak D 0 band at 1615 cm À1 which is normally positioned next to the G-band, while CNTs formed by CpFe(CO) 2 Me have a less pronounced D 0 band.…”

Section: Analysis Of Cntssupporting

confidence: 87%

Floating catalyst CVD synthesis of carbon nanotubes from CpFe(CO)2X (X=Me, I): Poisoning effects of I

Mohlala

Coville

2007

Journal of Organometallic Chemistry

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Section: Analysis Of Cntssupporting

confidence: 87%

Floating catalyst CVD synthesis of carbon nanotubes from CpFe(CO)2X (X=Me, I): Poisoning effects of I

Mohlala

Coville

2007

Journal of Organometallic Chemistry

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“…In this study, the type and the quality of MWNTs were confirmed by RS analysis (Figure 2). All the spectra showed two typical first-order Raman peaks (G band and D band), as well as the second-order Raman peak (D 0 band (Chen et al 2006) or denoted as G 0 band (Dresselhaus et al 2002)). These spectra did not show the characteristic peaks of SWNTs at 180-220 cm À1 , indicating the CNTs under study were only MWNTs.…”

Section: Rs Analysismentioning

confidence: 99%

“…D 0 band, at around 2690-2710 cm À1 , relates to the overtone of D band of the CNTs. The higher the intensity of D 0 band, the better the quality of the CNTs (Chen et al 2006). …”

Section: Rs Analysismentioning

confidence: 99%

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Surface characterization of acid-oxidized multi-walled carbon nanotubes

Chiang

Lee

2009

Toxicological & Environmental Chemistry

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Multi-walled carbon nanotubes (MWNTs) oxidized with sulfuric acid, nitric acid, and the mixture of sulfuric and nitric acids were characterized by thermogravimetric analysis (TGA), Raman spectroscopy, elemental analysis, X-ray diffraction, and X-ray photoelectron spectroscopy. The TGA data showed that the MWNTs were more resistant to oxidation than C 60 or activated carbon fibers. Catalyst particles could be removed by the oxidants containing sulfuric acid, and thus indicative of the tip opening of MWNTs. The sulfuric acid had a propensity to create defect sites and introduce the surface oxides at those defects that already exist or be newly generated on MWNTs. However, the acid mixture could open the caps of MWNTs but preserve the structure homogeneity. The treatment with nitric acid gave rise to the highest bulk oxygen content in MWNTs, while the most abundant surface oxides were provided by sulfuric acid oxidation. In addition, nitric acid exhibited the best ability to transform the phenolic groups into carboxyl groups.

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“…CVD technique is very useful for producing such structures. Various CVD methods have been developed for synthesizing SWCNTs as well as MWCNT, such as, catalytic CVD or thermal CVD, plasma enhanced CVD (PECVD) (Cheng et al 1998) and floating catalyst CVD method (Ago et al 2005;Chen et al 2006). In the CVD process, organic compounds are decomposed in the presence of catalyst.…”

Section: Introductionmentioning

confidence: 99%

Growth of carbon nanotube filaments on carbon fiber cloth by catalytic chemical vapor deposition

Singh

Choudhary

Singh³

et al. 2013

Appl Nanosci

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Multiwalled carbon nanotube (MWCNT) filaments were grown by catalytic chemical vapor deposition on 2-D weave carbon fiber (CF) cloth substrates. Two different sets of experiments were carried out to understand the growth mechanism of these filaments. In the first set of experiments where CF cloths were coated with the catalysts particles, CNT filaments having long length ([200 lm) and large diameter (15-25 lm) were obtained. In another set of experiment, where CF cloths without catalyst particles were used, only MWCNTs without any filament formation were obtained. On the basis of the results, a growth mechanism has been proposed. These MWCNT filaments can be used for preparing CNTs reinforced polymer composites having very good structural properties, which are being sought after.

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Optimization of carbon nanotube powder growth using low pressure floating catalytic chemical vapor deposition

Cited by 21 publications

References 16 publications

Floating catalyst CVD synthesis of carbon nanotubes from CpFe(CO)2X (X=Me, I): Poisoning effects of I

Floating catalyst CVD synthesis of carbon nanotubes from CpFe(CO)2X (X=Me, I): Poisoning effects of I

Surface characterization of acid-oxidized multi-walled carbon nanotubes

Growth of carbon nanotube filaments on carbon fiber cloth by catalytic chemical vapor deposition

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