Invention Grant
- Patent Title: Method for purification of as-produced single-wall carbon nanotubes
- Patent Title (中): 纯化生产的单壁碳纳米管的方法
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Application No.: US10028231Application Date: 2001-12-21
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Publication No.: US07115864B2Publication Date: 2006-10-03
- Inventor: Daniel T. Colbert , Hongjie Dai , Jason H. Hafner , Andrew G. Rinzler , Richard E. Smalley , Jie Liu , Kenneth A. Smith , Ting Guo , Pavel Nikolaev , Andreas Thess
- Applicant: Daniel T. Colbert , Hongjie Dai , Jason H. Hafner , Andrew G. Rinzler , Richard E. Smalley , Jie Liu , Kenneth A. Smith , Ting Guo , Pavel Nikolaev , Andreas Thess
- Applicant Address: US TX Houston
- Assignee: William Marsh Rice University
- Current Assignee: William Marsh Rice University
- Current Assignee Address: US TX Houston
- Agency: Winstead Sechrest & Minick P.C.
- Agent Ross Spencer Garsson; Edward T. Mickelson
- Main IPC: G01N23/00
- IPC: G01N23/00

Abstract:
This invention relates generally to a single-wall carbon nanotube (SWNT) purification process and more particularly to a purification process that comprises heating the SWNT-containing felt under oxidizing conditions to remove the amorphous carbon deposits and other contaminating materials. In a preferred mode of this purification procedure, the felt is heated in an aqueous solution of an inorganic oxidant, such as nitric acid, a mixture of hydrogen peroxide and sulfuric acid, or a potassium permanganate. Preferably, SWNT-containing felts are refluxed in an aqueous solution of an oxidizing acid at a concentration high enough to etch away amorphous carbon deposits within a practical time frame, but not so high that the single-wall carbon nanotube material will be etched to a significant degree. When material having a high proportion of SWNT is purified, the preparation produced will be enriched in single-wall nanotubes, so that the SWNT are substantially free of other material.
Public/Granted literature
- US20020092984A1 Method for purification of as-produced single-wall carbon nanotubes Public/Granted day:2002-07-18
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