Selective removal of metal impurities from single walled carbon nanotube samples - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue New Journal of Chemistry Année : 2013

Selective removal of metal impurities from single walled carbon nanotube samples

Claire Hérold
Sébastien Cahen
Jaafar Ghanbaja
Gianrico Lamura
  • Fonction : Auteur
Christine Bellouard
Brigitte Vigolo

Résumé

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.
Fichier non déposé

Dates et versions

hal-01276615 , version 1 (19-02-2016)

Identifiants

Citer

Guillaume Mercier, Claire Hérold, Jean-François Marêché, Sébastien Cahen, Jerome Gleize, et al.. Selective removal of metal impurities from single walled carbon nanotube samples. New Journal of Chemistry, 2013, 37 (3), pp.790-795. ⟨10.1039/c2nj41057e⟩. ⟨hal-01276615⟩
38 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More