Journal
ACS NANO
Volume 2, Issue 8, Pages 1634-1638Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn800388g
Keywords
few-walled carbon nanotubes; purification; high yield; hydrogen peroxide; Raman spectra
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Funding
- Unidym Inc
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Purification of high-quality few-walled carbon nanotubes (fWNTs) was developed by slow but selective oxidation in hydrogen peroxide (H2O2) at room temperature. The purity, nanotubes' structure, and thermal stability of purified fWNTs were characterized by transmission electron microscopy (TEM), Raman spectroscopy, and thermogravimetric analysis (TGA), respectively. The results showed that fWNTs could be selectively purified by prolonging the stirring time in 30 wt % H2O2 solution. Highly purified fWNTs were obtained, having a high G/D ratio in Raman spectra and good thermal stability indicating the good quality of the purified fWNTs. The approach provides a simple low cost method for purification that also has higher nanotube yield than other purification methods.
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