Title
Carbon nanotubes production over Co/silica catalysts Carbon nanotubes production over Co/silica catalysts
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Basel ,
Subject
Chemistry
Source (journal)
Catalysis letters. - Basel
Volume/pages
48(1997) :3-4 , p. 229-238
ISSN
1011-372X
ISI
000071291600013
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
For the catalytic synthesis of carbon nanotubes having fullerene-like diameters, a detailed description of the catalyst preparation is given. Silica-supported catalyst samples (prepared from Co-acetate solution of different pH) were tested in the decomposition of acetylene. Catalysts with various pretreatments (different calcination temperature, time and atmosphere) were compared in the carbon nanotubes production and characterized by X-ray photoelectron spectroscopy (XPS). The quality and the quantity of the buckytubes were studied by transmission electron microscopy (TEM). As a final conclusion, it is possible that changing the pH of the solution during catalyst preparation allows control of the quality of the carbon nanotubes, namely the amount of turbostratic straight and helical tubes.
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