Synthesis of Carbon Nanofibers over Bulk Nickel Alloy in a Closed Reactor System
Catalytic chemical vapour deposition (CCVD) of different organic compounds (butyl iodide, chlorobenzene and melamine) over bulk nickel-containing items in a closed reactor system was studied. Scanning electron microscopy (SEM) and ferromagnetic resonance (FMR) spectroscopy were applied to characterize the samples. The process of self-disintegration of bulk metal precursor was shown to require a presence of both hydrogen and heteroatom sources in a reaction medium. Chlorobenzene and butyl iodide represent by theirself the compounds containing both hydrogen and halogen in an appropriate amount. Melamine was considered as a nitrogen-containing organic compound, which is proper to synthesize the nitrogen-doped carbon nanofibers. Disintegration of nichrome wire with formation of dispersed particles catalyzing the growth of carbon nanofibers in the presence of butyl iodide was found to take place at 475 °C, while in the cases of chlorobenzene and melamine the temperature required to initialize the prcess was 550 and 560 °C, correspondingly.