Preparation of carbon nanotubes

C - Chemistry – Metallurgy – 01 – B

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C01B 31/02 (2006.01)

Patent

CA 2454009

The present invention is to provide a process for the preparation of carbon nanotubes or nanofibers, which comprises introducing in a gaseous phase a colloidal solution of matal nanoparticles optionally containing a surfactant together with an optional carbon source into a heated reactor, and carbon nanotubes or nanofibers thus prepared. According to the present invention, the shape and structure of carbon nanotubes or nanofibers can be easily controlled, the carbon nanotubes or nanofibers can be continuously produce on a large scale, the apparatus and the process for the preparation of nanotubes or nanofibers are simplified, and carbon nanotubes or nanofibers having various shapes, structures and properties can be easily and cheaply prepared. Further, the process of the present invention is highly reproducible and favorable in industry.

L'invention concerne un procédé servant à préparer des nanotubes ou des nanofibres de carbone, ce qui consiste à introduire en phase gazeuse dans un réacteur réchauffé une solution colloïdale de nanoparticules métalliques contenant éventuellement un tensioactif avec une source de carbone éventuelle, ainsi que les nanotubes ou nanofibres de carbone préparés au moyen de ce procédé. L'invention permet de contrôler sans difficulté la forme et la structure de ces nanotubes ou nanofibres de carbone, de les fabriquer en continu en quantités importantes. Le dispositif et le procédé servant à préparer ces nanotubes ou nanofibres étant, de ce fait, simplifiés. Il est possible de préparer sans difficultés et de façon économique des nanotubes ou des nanofibres de carbone présentant différentes formes, structures ou propriétés. De plus, ce procédé est extrêmement reproductible et peut s'appliquer avantageusement au domaine industriel.

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