Steam purification for the removal of graphitic shells coating catalytic particles and the shortening of single-walled carbon nanotubes

Belén Ballesteros, Gerard Tobias, Lidong Shao, Eva Pellicer, Josep Nogués, Ernest Mendoza, Malcolm L.H. Green

Research output: Contribution to journalArticleResearchpeer-review

67 Citations (Scopus)

Abstract

Purification and shortening of single-walled carbon nanotubes (SWNTs) is carried out by treatment with steam. During the steam purification the graphitic shells coating the catalytic metal particles are removed. Consequently, the exposed catalytic particles can be easily dissolved by treatment with hydrochloric acid. No damage to the carbon nanotube tubular structure is observed, even after prolonged treatment with steam. Samples are characterized by HRTEM, TGA, magnetic measurements, Raman spec-troscopy, AFM, and XPS. © 2008 Wiley-VCH Verlag GmbH & Co. KGaA.
Original languageEnglish
Pages (from-to)1501-1506
JournalSmall
Volume4
Issue number9
DOIs
Publication statusPublished - 1 Jan 2008

Keywords

  • Carbon nanotubes
  • Catalysis
  • Purification
  • Shortening
  • Steam

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