Purification of carbon nanotubes based on the chemistry of...

Details Purification of carbon nanotubes based on the chemistry of... Purification of carbon nanotubes based on the chemistry of...

2005-12-28

2009-02-24

Vanoy, Timothy C (Department: 1793)

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

C977S845000

Reexamination Certificate

active

07494639

ABSTRACT:
The present invention is directed to methods of purifying carbon nanotubes (CNTs). In general, such methods comprise the following steps: (a) preparing an aqueous slurry of impure CNT material; (b) establishing a source of Fe2+ions in the slurry to provide a catalytic slurry; (c) adding hydrogen peroxide to the catalytic slurry to provide an oxidative slurry, wherein the Fe2+ions catalyze the production of hydroxyl radicals; and (d) utilizing the hydroxyl radicals in the oxidative slurry to purify the CNT material and provide purified CNTs.

REFERENCES:
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patent: 2003/0039604 (2003-02-01), Niu Chunming et al.
patent: 2003-089510 (2003-03-01), None
patent: WO9839250 (1998-09-01), None
Capes, L., et al.: “High yield non-destructive purification of single wall caron nanotubes monitored by EPR measurements”, Nanotechnology, 2002. IEEE-Nano 2002; Proceedings of the 2002 2nd IEEE conference; Aug. 26, 2002; Piscataway, NJ, USA.

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