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Purification of Single-Wall Carbon Nanotubes by Selective Microwave Heating of Catalyst Particles
Abstract
A new scalable method for purification of single-wall carbon nanotubes (SWNTs) by using microwave heating in air is developed. The microwaves couple to the residual metal catalyst, raising significantly the local temperature leading to both the oxidation and rupturing of the carbon passivation layer over the metal catalyst particles. With this protective carbon coating weakened or removed, a mild acid treatment is then sufficient to remove most of the metal in the sample, leaving the nanotubes in tact. Using microwave processing and 4 M HCl acid reflux for 6 h we were able to remove residual metal (Ni, Y) in arc-discharge SWNTs to a level lower than 0.2 wt % (∼0.04 at. %). Results from transmission and scanning electron microscopy, Raman spectroscopy, and thermogravimetric studies were discussed.
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Citations
Cited by
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Tjong, S. C. (2006) · Materials Science and Engineering: R: Reports · doi:10.1016/j.mser.2006.06.001 · Cited by 1,531
Carbon nanotubes, science and technology part (I) structure, synthesis and characterisation
Aqel, A., El-Nour, K. M. M. A., Ammar, R. A. A., & Al-Warthan, A. (2012) · Arabian Journal of Chemistry · doi:10.1016/j.arabjc.2010.08.022 · Cited by 615
Raman and IR Spectroscopy of Chemically Processed Single-Walled Carbon Nanotubes
Kim, U. J., Furtado, C. A., Liu, X., Chen, G., & Eklund, P. C. (2005) · Journal of the American Chemical Society · doi:10.1021/ja052951o · Cited by 567
Self-citationSynthesis and Modification of Carbon Nanomaterials utilizing Microwave Heating
Schwenke, A. M., Hoeppener, S., & Schubert, U. S. (2015) · Advanced Materials · doi:10.1002/adma.201500472 · Cited by 366
Purification of Single-Wall Carbon Nanotubes by Electrochemical Oxidation
Fang, H.-T., Liu, C.-G., Liu, C., Li, F., Liu, M., & Cheng, H.-M. (2004) · Chemistry of Materials · doi:10.1021/cm035263h · Cited by 165
Targeted removal of bioavailable metal as a detoxification strategy for carbon nanotubes
Liu, X., Guo, L., Morris, D., Kane, A. B., & Hurt, R. H. (2008) · Carbon · doi:10.1016/j.carbon.2007.12.018 · Cited by 135
Metadata
- Authors
- Harutyunyan, A. R., Pradhan, B. K., Chang, J., Chen, G., & Eklund, P. C.
- Venue
- The Journal of Physical Chemistry B
- Publisher
- American Chemical Society (ACS)
- Published
- 2002-07-26
- Volume
- 106
- Issue
- 34
- Pages
- 8671-8675
- ISSN
- 1520-5207 (ISSN-L)
- 1520-6106
- OpenAlex
- W2008300506
- Cited by
- 219
- References
- 0
- FWCI
- 9.83
- Type
- journal article
- Language
- en
- Open access
- closed
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