Method of purifying carbon nanotubes

Details Method of purifying carbon nanotubes Method of purifying carbon nanotubes

1994-06-02

1997-06-24

Straub, Gary P.

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

423445B, 4234471, 423461, C01B 3100, D01F 912

Patent

active

056414668

ABSTRACT:
A mixture of carbon nanotubes and impurity carbon materials, which include carbon nanoparticles and may possibly include amorphous carbon, is purified into carbon nanotubes of high purity by utilizing a significant difference in oxidizability between the nanotubes and the nanoparticles. The mixture is pulverized and heated in the presence of an oxidizing agent at a temperature in the range from 600.degree. to 1000.degree. C. until the impurity carbon materials are oxidized and dissipated into gas phase. The nanotubes remain almost unoxidized except for loss of some lengths from the tube tips. It is suitable to perform the heating in air or oxygen.

REFERENCES:
patent: 5346683 (1994-09-01), Green et al.
Saxby, J., et al. "Thermogravimetric Analysis of Buckminster Fullerene and Related Materials in Air", J. Phys. Chem., vol. 96 (1992), pp. 17-18.
Werner, H., et al. "Spectroscopic and Chemical Characterization of Fullerene Black", Chem. Phys. Lett., vol. 194, #1,2 (1992), pp. 62-66.
Ajayan, P., et al. "Opening Carbon Nanotubes With Oxygen and Implications for Filling", Nature, vol. 362, pp. 522-525 (Apr. 1993).
Iijima, S., et al. "Capillarity-induced Filling of Carbon Nanotubes", Nature, vol. 361, pp. 333-334 (Jan. 1993).
Ando, Y., et al. "Preparation of Carbon Nanotubes by Arc-Discharge Evaporation", Japan Journal of Applied Physics, vol. 32 (1993), Part 2, No. 1A/B, pp. L107-L109 (Jan. 1993).

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