Jump to main content
Jump to site search

Issue 14, 2016
Previous Article Next Article

Enhanced purification of carbon nanotubes by microwave and chlorine cleaning procedures

Author affiliations

Abstract

A new two-step purification method of carbon nanotubes (CNTs) involving a microwave treatment followed by a gas-phase chlorination process is reported. The significant advantage of this method over conventional cleaning carbon nanotubes procedures is that under microwave treatment in air, the carbon shells that encase the residual metal catalyst particles are removed and the metallic iron is exposed and subsequently oxidized making it accessible for chemical removal. The products from microwave and chlorine treatment have been characterized by TG/DTA, SEM, TEM, EDX, XPS, and Raman spectroscopy. The oxidation state of the iron residue is observed to change from Fe(0) to Fe(II)/Fe(III) after microwave treatment and atmospheric exposure. The effects of the duration and number of microwave exposures has been investigated. This rapid and effective microwave step favours the subsequent chlorination treatment enabling a more effective cleaning procedure to take place, yielding higher purity single- and multi-walled CNTs.

Graphical abstract: Enhanced purification of carbon nanotubes by microwave and chlorine cleaning procedures

Back to tab navigation

Publication details

The article was received on 23 Nov 2015, accepted on 15 Jan 2016 and first published on 22 Jan 2016


Article type: Paper
DOI: 10.1039/C5RA24854J
Citation: RSC Adv., 2016,6, 11895-11902
  •   Request permissions

    Enhanced purification of carbon nanotubes by microwave and chlorine cleaning procedures

    V. Gomez, S. Irusta, O. B. Lawal, W. Adams, R. H. Hauge, C. W. Dunnill and A. R. Barron, RSC Adv., 2016, 6, 11895
    DOI: 10.1039/C5RA24854J

Search articles by author

Spotlight

Advertisements