[en] Krypton is a subcritical vapour at the nitrogen boiling temperature. As such, its adsorption on
crystalline surfaces leads to condensation steps, typical of type VI isotherms according to
IUPAC, while its adsorption on rough surfaces is BET-like. Based on this property of krypton
adsorption at 77 K, a methodology is proposed to determine the purity of carbon nanotubes
samples. The method is tested on model samples obtained by mixing mechanically purified
multi-walled carbon nanotubes with various amounts of the same catalyst as used for their
synthesis.
Disciplines :
Materials science & engineering Physics
Author, co-author :
Gommes, Cédric ; Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Génie catalytique
Noville, Francis ; Université de Liège - ULiège > Département de chimie appliquée > Département de chimie appliquée
Bossuot, Christophe
Pirard, Jean-Paul ; Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Génie catalytique
Language :
English
Title :
Qualitative assessment of the purity of multi-walled carbon nanotube samples using krypton adsorption
