Article

Microwave purification of MWNTs

European Nano Systems 2005, Paris, France, 14-16 December 2005 DOI:handle TIMA 2243/ENS2005_1054
Source: OAI

ABSTRACT 37-38 In the last years carbon nanotubes (CNTs) have attracted very great attention due to their exceptional properties. For their preparation, catalytic chemical vapour deposition (CCVD) of hydrocarbons over supported metal catalysts has been extensively studied. The as grown CCVD CNTs contain impurities, such as disordered carbon, catalyst and support. The amount of impurities prevents the use of the as-prepared materials for many scientific investigations and applications. Therefore, a great challenge remains in the control of their fabrication and purification. Recently, many purification methods have been investigated, most of them being based on a step involving oxidising attack by mineral acids for the removal of carbon nanotubes impurities.

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Keywords

as-prepared materials
 
carbon nanotubes impurities
 
catalytic chemical vapour deposition
 
CCVD
 
disordered carbon
 
exceptional properties
 
fabrication
 
great attention
 
great challenge
 
grown CCVD CNTs
 
hydrocarbons
 
last years carbon nanotubes
 
metal catalysts
 
oxidising attack
 
scientific investigations