Abstract:
In this study, carbon nanomaterials were prepared using a nebulized spray pyrolysis process. A mixed
solution of from kerosene oil and dissolved ferrocene catalyst was nebulized into droplets which were
then carried by N2 gas flow through a furnace tube. Upon heating, the oil was decom-posed onto the
surface of activated carbons. By varying the catalyst concentration dissolved in the oil (0.015, 0.02 and
0.025 g/ml) and operating temperature (650, 700 and 750 _C), the struc-ture or morphology of the asprepared
carbon nanomaterials can be adjusted. The structure and morphology of the carbon samples
were observed using scanning electron microscopy (SEM) and transmission electron microscopy (TEM).
Their graphite crystallinity was analyzed using Raman spectroscopy. The experimental results showed
that carbon nanospheres (CNSs) formed at a lower catalyst concentration (0.015 and 0.02 g/ml),
whereas carbon nanotubes (CNTs) were obtained at a higher concentration (0.025 g/ml) for deposition
conducted at 700 _C. Similarly, agglomerated CNSs were also observed for deposition done at 650 and
750 _C and catalyst concentration of 0.02 g/ml.
