DocumentCode
937127
Title
Comparison of Fe/Al2O3 and Fe, Co/Al2O3 catalysts used for production of carbon nanotubes from acetylene by CCVD
Author
Kónya, Zoltán ; Vesselényi, István ; Lázár, Károly ; Kiss, János ; Kiricsi, Imre
Author_Institution
Reaction Kinetics Res. Group of the Hungarian Acad. of Sci., Univ. of Szeged, Hungary
Volume
3
Issue
1
fYear
2004
fDate
3/1/2004 12:00:00 AM
Firstpage
73
Lastpage
79
Abstract
Characterization of iron containing alumina supported catalysts was performed by transmission electron microcopy (TEM), Mössbauer, and XPS spectroscopy during formation of multiwall carbon nanotubes from acetylene at 1000 K. TEM images showed that carbon fibers (outer diameter is around 20-40 nm) were generated on Fe/Al2O3 samples while on the bimetallic Fe,Co/Al2O3 carbon nanotubes with an average diameter of 8-12 nm were formed. XPS spectra revealed that Fe-Co alloy formed during the interaction of Fe,Co/Al2O3 and acetylene at 1000 K. The formation of the bimetallic alloy was proven by Mössbauer spectroscopy as well.
Keywords
Mossbauer effect; X-ray photoelectron spectra; alumina; carbon fibres; carbon nanotubes; catalysts; chemical vapour deposition; cobalt; cobalt alloys; iron; iron alloys; metallic thin films; nanotechnology; transmission electron microscopy; 1000 K; 20 to 40 nm; 8 to 12 nm; C; CCVD; Co-Al2O3; Co/Al2O3 catalysts; F-Co alloy; Fe catalysts; Fe-Al2O3; Fe/Al2O3 catalysts; FeCo-Al2O3; Mossbauer spectra; TEM; XPS; acetylene; alumina; bimetallic Fe; bimetallic alloy; carbon fibers; carbon nanotubes production; multiwall carbon nanotubes; transmission electron microscopy; Aluminum alloys; Amorphous materials; Carbon nanotubes; Chemical lasers; Chemistry; Infrared spectra; Iron; Production; Spectroscopy; Transmission electron microscopy;
fLanguage
English
Journal_Title
Nanotechnology, IEEE Transactions on
Publisher
ieee
ISSN
1536-125X
Type
jour
DOI
10.1109/TNANO.2004.824033
Filename
1278272
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