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Title: Gas-phase purification of single-wall carbon nanotubes

Abstract

A gas-phase purification method for raw nanotube material has been developed which incorporates a chlorine, water, and hydrogen chloride gas mixture to remove unwanted carbon. The evolved gases can be easily monitored by infrared spectroscopy to follow the cleaning process. The quality of the final material was verified by SEM (scanning electron microscopy), TGA (thermogravimetric analysis), and UV-vis (ultraviolet and visible absorption spectroscopy). The yield of {approximately}15 wt % indicates a uniquely selective carbon surface chemistry that prevents etching of the nanotubes, which are generally more reactive due to their larger curvature. Although the technique's usefulness for large-scale purification was not determined, the ability to purify single-wall nanotubes by a gas-phase method has been demonstrated, and a mechanism proposed.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Rice Univ., Houston, TX (US)
OSTI Identifier:
20080265
Resource Type:
Journal Article
Journal Name:
Chemistry of Materials
Additional Journal Information:
Journal Volume: 12; Journal Issue: 5; Other Information: PBD: May 2000; Journal ID: ISSN 0897-4756
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CARBON; TUBES; PURIFICATION; GASES; CHLORINE; WATER; HYDROCHLORIC ACID

Citation Formats

Zimmerman, J.L., Bradley, R.K., Huffman, C.B., Hauge, R.H., and Margrave, J.L. Gas-phase purification of single-wall carbon nanotubes. United States: N. p., 2000. Web. doi:10.1021/cm990693m.
Zimmerman, J.L., Bradley, R.K., Huffman, C.B., Hauge, R.H., & Margrave, J.L. Gas-phase purification of single-wall carbon nanotubes. United States. doi:10.1021/cm990693m.
Zimmerman, J.L., Bradley, R.K., Huffman, C.B., Hauge, R.H., and Margrave, J.L. Mon . "Gas-phase purification of single-wall carbon nanotubes". United States. doi:10.1021/cm990693m.
@article{osti_20080265,
title = {Gas-phase purification of single-wall carbon nanotubes},
author = {Zimmerman, J.L. and Bradley, R.K. and Huffman, C.B. and Hauge, R.H. and Margrave, J.L.},
abstractNote = {A gas-phase purification method for raw nanotube material has been developed which incorporates a chlorine, water, and hydrogen chloride gas mixture to remove unwanted carbon. The evolved gases can be easily monitored by infrared spectroscopy to follow the cleaning process. The quality of the final material was verified by SEM (scanning electron microscopy), TGA (thermogravimetric analysis), and UV-vis (ultraviolet and visible absorption spectroscopy). The yield of {approximately}15 wt % indicates a uniquely selective carbon surface chemistry that prevents etching of the nanotubes, which are generally more reactive due to their larger curvature. Although the technique's usefulness for large-scale purification was not determined, the ability to purify single-wall nanotubes by a gas-phase method has been demonstrated, and a mechanism proposed.},
doi = {10.1021/cm990693m},
journal = {Chemistry of Materials},
issn = {0897-4756},
number = 5,
volume = 12,
place = {United States},
year = {2000},
month = {5}
}