A facile and efficient gas phase process for purifying single-walled carbon nanotubes

Reproducible, low loss and high-yield purification process for single-walled carbon nanotubes (SWNTs) was developed by coupling of oxidation in wet air and treatment with gas phase nitric acid. Oxidation in wet air can burn out the carbonaceous particles and gas phase nitric acid treatment can etch...

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Bibliographic Details
Published in:Current applied physics 2010, 10(4), , pp.1231-1235
Main Authors: Rong, Haiqin, Liu, Zhenyu, Wu, Qilin, Lee, Young-Hee
Format: Article
Language:English
Subjects:
Burns
Carbon
Field emission
Gas phase nitric acid
Gas phase purification
Gas phases
Nitric acid
Oxidation
Scanning electron microscopy
Single wall carbon nanotubes
Single-walled carbon nanotubes
Wet air
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Summary:Reproducible, low loss and high-yield purification process for single-walled carbon nanotubes (SWNTs) was developed by coupling of oxidation in wet air and treatment with gas phase nitric acid. Oxidation in wet air can burn out the carbonaceous particles and gas phase nitric acid treatment can etch away the catalytic metals. The as-synthesized SWNTs and the purified SWNTs were characterized by field emission scanning electron microscopy, high resolution transmission electron microscopy, Raman spectrophotometer and thermal gravimetric analysis. It was shown that such a facile and controllable gas phase process for purifying SWNTs can lead to the minimal losses and minimal destruction of SWNTs, thus highly purified SWNTs without amorphous carbon and with very low metal content were obtained.
ISSN:1567-1739
1878-1675
DOI:10.1016/j.cap.2010.02.049