Purification and opening of carbon nanotubes via bromination

Authors

  • Prof. Yao K. Chen,

    1. Inorganic Chemistry Laboratory, University of Oxford South Parks Road, Oxford, OX1 3QR (UK)
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  • Prof. Malcolm L. H. Green,

    Corresponding author
    1. Inorganic Chemistry Laboratory, University of Oxford South Parks Road, Oxford, OX1 3QR (UK)
    • Inorganic Chemistry Laboratory, University of Oxford South Parks Road, Oxford, OX1 3QR (UK)
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  • Prof. Julian L. Griffin,

    1. Inorganic Chemistry Laboratory, University of Oxford South Parks Road, Oxford, OX1 3QR (UK)
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  • Dr. Jens Hammer,

    1. Inorganic Chemistry Laboratory, University of Oxford South Parks Road, Oxford, OX1 3QR (UK)
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  • Dr. Rachel M. Lago,

    1. Inorganic Chemistry Laboratory, University of Oxford South Parks Road, Oxford, OX1 3QR (UK)
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  • Dr. Shik C. Tsang

    1. Inorganic Chemistry Laboratory, University of Oxford South Parks Road, Oxford, OX1 3QR (UK)
    Current affiliation:
    1. The Catalysis Research Centre, Department of Chemistry, University of Reading, Whiteknights, Reading, RG6 6AD (UK)
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  • We wish to acknowledge Dr. R. G. Egdell and Mr. Y. S. Dou of the New Chemistry Laboratory, University of Oxford for the measurement of the XPS spectra. We thank the Royal Society of London for the University Research Fellowship (to SCT).

Abstract

The purification and opening of carbon nanotubes via bromination is reported. Refluxing raw cathodic soot containing a mixture of nanotubes, nanoparticles, and amorphous carbon in liquid bromine, followed by oxidation in air, is shown to yield 10–20; w/w pure and opened nanotubes. The role of bromine in the purification steps is discussed, based on the results of transmission electron microscopy, temperature programmed oxidation, X-ray diffraction, and X-ray photoelectron spectroscopy investigations.

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