| Title | An efficient strategy for the purification of cloth-like single walled carbon nanotube soot produced by arc discharge |
| Authors | Guo, Wei Dou, Zengpei Li, He Shi, Zujin Sun, Hongfang Liu, Yuanfang |
| Affiliation | Peking Univ, Coll Chem & Mol Engn, Dept Biol Chem, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China. Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China. |
| Keywords | IR SPECTROSCOPY COMPOSITES REMOVAL STEAM RAMAN |
| Issue Date | 2010 |
| Publisher | 炭素 |
| Citation | CARBON.2010,48,(13),3769-3777. |
| Abstract | High purity single walled carbon nanotubes (SWCNTs) were prepared from arc discharge produced cloth-like soot by a new purification strategy, in which liquid oxidation and steam oxidation were combined with a freeze-drying process to remove the metallic and carbonaceous impurities. The process gives a product of >98% purity, which is acquired from a gram-scale dirty raw soot with an overall yield of similar to 75% of the SWCNTs. The purity of the samples was characterized by thermogravimetric analysis, scanning and transmission electron microscopy, Raman and Vis-NIR spectroscopy, and magnetometry. A highly pure SWCNT sample with relative purity of 170.4% and I(G)/I(D) value of 78.92 is achieved. Experiments showed that HNO(3)/HCl refluxing combined with freeze-drying is the key process that renders the crude SWCNTs hydrophilic with a large surface area, and thus remarkably increases the efficiency of the steam treatment to remove most of the carbonaceous impurities. (C) 2010 Elsevier Ltd. All rights reserved. |
| URI | http://hdl.handle.net/20.500.11897/151119 |
| ISSN | 0008-6223 |
| DOI | 10.1016/j.carbon.2010.06.039 |
| Indexed | SCI(E) EI |
| Appears in Collections: | å å¦ä¸ å å å·¥ç¨ å¦é ¢ 稀土材料化学与应用国家重点实验室 |
