Abstract:
Bis(acetylacetonato)oxovanadium(IV), Manganese(III) acetylacetonate, Co-Zn and
Co-Al were prepared as catalyst precursors for the synthesis of carbon materials in
a catalytic chemical vapor deposition (CCVD) reactor. The carbon materials
produced were characterized with Raman spectroscopy, Scanning electron
microscope (SEM), Energy dispersive spectroscopy (EDS), X-ray diffraction (XRD),
High resolution transmission electron microscopy (TEM) and Thermogravimetric
analysis, (TGA).
Carbon material prepared from bis(acetylacetonato)oxovanadium(IV) catalyst
precursor showed the presence of carbon spheres with average diameter of 104μm
together with small traces of carbon nanotubes or amorphous carbon. Synthesis of
bis(acetylacetonato)oxovanadium(IV) catalyst precursor yielded approximately 92%
of carbon material. Carbon material prepared from Manganese(III) acetylacetonate
catalyst precursor showed the presence of carbon spheres with diameter of 87.5μm.
Synthesis of Manganese(III) acetylacetonate catalyst precursor yielded
approximately 97% of carbon material.
Carbon material produced from Co-Zn and Co-Al catalyst precursors showed the
presence of carbon nanotubes with small amounts of amorphous carbon. The use of
Co-Zn catalyst precursor yielded approximately 80% of carbon nanotubes, whereas
Co-Al catalyst precursor yielded approximately 98% of carbon nanotubes.
