Comparison of Fe/Al sub(2)O sub(3) and Fe, Co/Al sub(2)O sub(3) catalysts used for production of carbon nanotubes from acetylene by CCVD

Characterization of iron containing alumina supported catalysts was performed by transmission electron microcopy (TEM), Mossbauer, 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) we...

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Bibliographic Details
Published in:IEEE transactions on nanotechnology 2004-01, Vol.3 (1)
Main Authors: Konya, Z, Vesselenyi, I, Lazar, K, Kiss, J, Kiricsi, I
Format: Article
Language:English
Subjects:
Acetylene
Aluminum oxide
Carbon nanotubes
Catalysts
Intermetallic compounds
Iron
Transmission electron microscopy
X-ray photoelectron spectroscopy
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Summary:Characterization of iron containing alumina supported catalysts was performed by transmission electron microcopy (TEM), Mossbauer, 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/Al sub(2)O sub(3) samples while on the bimetallic Fe,Co/Al sub(2)O sub(3) 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/Al sub(2)O sub(3) and acetylene at 1000 K. The formation of the bimetallic alloy was proven by Mossbauer spectroscopy as well.
ISSN:1536-125X
DOI:10.1109/TNANO.2004.824033