Title
Preparation of <tex>$Mg_{1-x}FeMoO_{4}$</tex> catalyst and its application to grow MWNTs with high efficiencyPreparation of <tex>$Mg_{1-x}FeMoO_{4}$</tex> catalyst and its application to grow MWNTs with high efficiency
Author
Faculty/Department
Faculty of Sciences. Chemistry
Research group
Department of Chemistry
Structural chemistry group
Publication type
article
Publication
Amsterdam,
Subject
Physics
Source (journal)
Diamond and related materials. - Amsterdam
Volume/pages
13(2004):10, p. 1807-1811
ISSN
0925-9635
ISI
000223883400010
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Iron/molybdenum/magnesium mixed oxide prepared by a sol-gel method shows its high efficiency for synthesis of MWNTs through catalytic decomposition of methane using chemical vapor deposition (CVD) method at 1000 degreesC. The weight production of the as-grown MWNTs can reach as high as 30 times of the catalyst in 30 min growth. Upon SEM and TEM observations, the product is found to be compacted bundles of MWNTs. Microstructure of the tubes was characterized by transmission electron microscopy (TEM) and Raman spectroscopy. Thermal gravimetric analysis (TGA) examination showed that the content of MWNT is high. Using this high-efficient catalyst, the cost of producing carbon nanotubes (CNTs) can be greatly reduced. In order to understand the formation of MWNTs bundles and the high efficiency of the catalyst, microstructural evolution of the catalyst at different growth stages to form MWNTs were systematically examined by TEM, and a plausible explanation is presented. (C) 2004 Elsevier B.V. All rights reserved.
E-info
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