Purification and characterization of single-wall carbon nanotubes (SWNTs) obtained from the gas-phase decomposition of CO (HiPco process)

被引:669
作者
Chiang, IW [1 ]
Brinson, BE [1 ]
Huang, AY [1 ]
Willis, PA [1 ]
Bronikowski, MJ [1 ]
Margrave, JL [1 ]
Smalley, RE [1 ]
Hauge, RH [1 ]
机构
[1] Rice Univ, Dept Chem, Rice Quantum Inst, Ctr Nanoscale Sci & Technol, Houston, TX 77005 USA
关键词
D O I
10.1021/jp0114891
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A purification method is given for extracting the Fe metal catalyst and non-SWNT carbon from nanotubes produced by the HiPco process. (1,2) A multistage purification method has been investigated. Sample purity is documented by ESEM, TEM, TGA, Raman and UV-vis-near-IR spectroscopy. Metal catalyzed oxidation at low temperature has been shown to selectively remove non-SWNT carbon and permit extraction of iron with concentrated HCL Prolonged catalyzed oxidation has been found to preferentially remove smaller diameter tubes. The onset of oxidation of purified smaller diameter HiPco SWNTs is also found to be approximately 100 degreesC lower than for purified larger diameter tubes produced in the laser-oven process.
引用
收藏
页码:8297 / 8301
页数:5
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