Selective removal of metal impurities from single walled carbon nanotube samples (Articolo in rivista)

Type
Label
  • Selective removal of metal impurities from single walled carbon nanotube samples (Articolo in rivista) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1039/c2nj41057e (literal)
Alternative label
  • Mercier G.; Herold C.; Mareche J.-F.; Cahen S.; Gleize J.; Ghanbaja J.; Lamura G.; Bellouard C.; Vigolo B. (2013)
    Selective removal of metal impurities from single walled carbon nanotube samples
    in New journal of chemistry (1987)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Mercier G.; Herold C.; Mareche J.-F.; Cahen S.; Gleize J.; Ghanbaja J.; Lamura G.; Bellouard C.; Vigolo B. (literal)
Pagina inizio
  • 790 (literal)
Pagina fine
  • 795 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://www.scopus.com/inward/record.url?eid=2-s2.0-84874091228&partnerID=q2rCbXpz (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 37 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 3 (literal)
Note
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Institut Jean Lamour (IJL), CNRS, Université de Lorraine, BP 70239, 54506 Vandoeuvre-lès-Nancy, France; Laboratoire de Chimie Physique, Approche Multi-échelle de Milieux Complexes (LCP-A2MC), Université de Lorraine, 57078 Metz, France; CNR-Superconductors, Oxides and Other Innovative Materials and Devices (SPIN), Corso Perrone 24, 16152 Genova, Italy (literal)
Titolo
  • Selective removal of metal impurities from single walled carbon nanotube samples (literal)
Abstract
  • Large scale production of high quality CNT samples is still challenging. The presence of structural defects and metallic particles in pristine single walled carbon nanotubes (SWNTs) is responsible for the alteration of both their chemical stability and their magnetic and electrical properties. The commonly used purification procedures are based on multi-step treatments that are often too aggressive towards the CNTs, leading to disappointing yields. Here, we propose an alternative process that allows preparing high-quality and high-purity SWNT samples. The proposed process merely consists of heating up SWNT powder under high chlorine partial pressure and high temperature. These thermodynamic conditions favor high chlorine diffusion to metal impurities embedded in carbon shells thus inducing an avalanche process of metal chloride formation and sublimation. The purified samples have been characterized by transmission electron microscopy, thermogravimetric analysis, magnetic measurements and Raman spectroscopy. We show that the developed process combines selective elimination of catalytic impurities and high yields. More importantly, we show that this process preserves the quality of the resulting purified nanotubes. © 2013 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique. (literal)
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