Investigation on preparation of multiwalled carbon nanotubes by DC arc discharge under N2 atmosphere

Shen, Chengmin; Scharff, P.; Siegmund, C.; Schneider, Dietrich; Risch, K.; Klötzer, S.; Spieß, Lothar; Romanus, H.; Schawohl, J.

doi:10.1016/j.carbon.2003.12.060

Cited by 65 publications

(33 citation statements)

References 27 publications

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“…Cui et al [52] demonstrated that MWCNTs can be prepared by DC arc discharge under N 2 atomsphere with 200-300 Torr, and the N 2 flow rate should be smaller than 350 mL/min.…”

Section: Mwcntsmentioning

confidence: 99%

Carbon nanomaterials synthesized by arc discharge hot plasma

Zhang

2015

Carbon

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“…Cui et al [52] demonstrated that MWCNTs can be prepared by DC arc discharge under N 2 atomsphere with 200-300 Torr, and the N 2 flow rate should be smaller than 350 mL/min.…”

Section: Mwcntsmentioning

confidence: 99%

Carbon nanomaterials synthesized by arc discharge hot plasma

Zhang

2015

Carbon

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“…Based on the research results from preparation of MWCNTs in N 2 atmosphere by Cui et al [19], researchers expect imminently whether nanotubes could be prepared in air because *80 % of air is nitrogen. If air atmosphere is able to replace He atmosphere or H 2 atmosphere which is commonly used in arc discharge process, it could significantly reduce the cost of preparing CNTs and minimize the danger of H 2 used in large quantities.…”

Section: Introductionmentioning

confidence: 99%

“…Normally, MWCNTs can be prepared by direct current (DC) arc discharge in He atmosphere [10,[13][14][15][16], H 2 atmosphere [17,18], N 2 atmosphere [19], and ethanol [20]. It is well known that controlled atmosphere and gas pressure play the important roles in the formation of CNTs.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of straight multi-walled carbon nanotubes by arc discharge in air and their field emission properties

Zhao

Liu

et al. 2012

J Mater Sci

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The possibility of preparing straight multiwalled carbon nanotubes (MWCNTs) on a large scale is demonstrated using direct current arc discharge with a rotating graphite anode in low pressure air. The process is time-saving, economical, and non-hazardous. It is found that the optimum air pressure for the highest yield of MWCNTs is about 60 Torr. Investigation of the internal organization of the cathode deposit reveals that many columns about 40 lm in diameter are closely packed and mechanically stable. The highest content of MWCNTs is found in the intercolumnar spaces between columns. Emitters made of the cathode deposits that contain a large number of straight nanotubes exhibit outstanding field emission properties. The turn-on electric field decreases from 1.44 to 0.93 V/lm and the field enhancement factor b increases from about 3,190 to 7,830 only after simple burning at 750°C for 30 min in air. The results indicate that MWCNTs prepared by arc discharge in air are promising for field emission application.

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“…A number of procedures and methods have been developed to synthesis CNTs. [2][3][4][5][6][7][8][9][10] However, the mass production of this nanomaterial using these methods is still an issue. Due to limited success in the large scale production and cost effectiveness of CNTs, they could not be included with the wide range of cost effective products made from polymers or rubber.…”

Section: Introductionmentioning

confidence: 99%

Carbon nanotubes of oil fly ash as lubricant additives for different base oils and their tribology performance

et al. 2017

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Oil fly ash has been reported to be a good source for the production of carbon nanotubes (CNTs). Recently, these CNTs were evaluated as lubricant additives in sunflower base oil and were found to exhibit excellent tribological properties. In this work, these CNTs were tested as lubricant additives in 100SN, 500SN and 150BS Saudi Aramco base oils. The results on other commercial carbon nanostructures like multiwall and single wall CNTs and graphene are also included in this study for comparison. Excellent tribological performance was obtained with CNTs of fly ash at a very small concentration. The observed reduction in values of the friction coefficient between two metallic surfaces using these CNTs was found to be superior to those of other carbon nanomaterials. The value of the friction coefficient was reduced by around 20% at a concentration of 0.1 wt%. These values were also investigated as a function of load, speed and temperature. The rheological behaviour showed that the viscosity of the 0.1 wt% CNTsimpregnated 500SN oil is almost invariant compared to that of the pure one. It is therefore suggested that CNTs of fly ash may be a good lubricant additive to minimize the friction and improve the fuel economy.

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Investigation on preparation of multiwalled carbon nanotubes by DC arc discharge under N2 atmosphere

Cited by 65 publications

References 27 publications

Carbon nanomaterials synthesized by arc discharge hot plasma

Carbon nanomaterials synthesized by arc discharge hot plasma

Synthesis of straight multi-walled carbon nanotubes by arc discharge in air and their field emission properties

Carbon nanotubes of oil fly ash as lubricant additives for different base oils and their tribology performance

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