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Synthesis of carbon nanostructures by arc evaporation of graphite rods with Co-Ni and YNi2 catalysts |
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| Authors: | Boris P Tarasov Vyacheslav E Muradyan Elena P Krinichnaya Oleg N Efimov Dmitry V Schur Volodymyr A Yartys |
| Affiliation: | a Institute of Problems of Chemical Physics of RAS, 142432 Chernogolovka, Moscow Reg., Russia b Natural Science Center of General Physics Institute RAS, 117972 Moscow, Russia c Institute of Hydrogen and Solar Energy, P.O. Box 150, Kiev, 03150 Ukraine d Institute for Energy Technology, N-2027 Kjeller, Norway e Industrial Technology Research Institute, Hsinchu, Taiwan |
| Abstract: | Yields of single-walled carbon nanotubes (SWNTs) produced from electric arc evaporation of graphite electrodes with 3Co/Ni and YNi2 catalysts differ substantially. For instance, with YNi2 catalyst, the SWNT yield is ∼30-50 wt.% in ‘collar’ soot and ∼10-15 wt.% in ‘wall’ soot, while with 3Co/Ni catalyst, the yields are ∼15-20 wt.% and 2-3 wt.%, respectively. According to Raman spectroscopy data, the average dimension of SWNTs is ∼1.2 nm for 3Co/Ni and ∼1.4 nm for YNi2 catalyst. Optimum conditions for synthesis also differ for catalysts compared; namely, for 3Co/Ni: current intensity is 93 A, helium pressure is 650 Torr, the electrode gap is 2.5-3 mm; for YNi2: current intensity is 98 A, helium pressure is 500 Torr, the electrode gap is 1-2 mm. |
| Keywords: | A Carbon nanotubes Soot B Chemical treatment C Thermal analysis Raman spectroscopy |
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