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High-efficient synthesis of double-walled carbon nanotubes by arc discharge method using chloride as a promoter |
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| Authors: | Hanxun Qiu Zujin Shi Lunhui Guan Min Gao Jieshan Qiu |
| Affiliation: | a State Key Laboratory of Rare Earth Materials Chemistry and Applications, Department of Chemistry, Peking University, Beijing 100871, PR China b Carbon Research Laboratory, Center for Nano Material and Science, State Key Lab for Materials Modified by Laser, Ion and Electron Beams, Dalian University of Technology, Dalian 116024, PR China c Department of Physics, Peking University, Beijing 100871, PR China |
| Abstract: | With trace halide as a promoter in an iron sulfide catalyst, relatively perfect structural integrity double-walled carbon nanotubes (DWNTs) have been synthesized in large quantity and high yield by arc discharge method. Scanning electron microscope (SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA) and Raman spectroscopy were used for structural characterization and yield determination. The results revealed that halide was a crucial factor for selectively synthesizing high yield DWNTs. The detailed experimental parameters were systematically investigated. The possible role of halide in growth of DWNTs was discussed as well. |
| Keywords: | Carbon nanotubes Arc discharge Electron microscopy Raman spectroscopy Thermal analysis |
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