Optimization of the operational parameters in fullerene production

摘要

The process of fullerene formation and production was studied in terms of the operational parameters of the DC are discharge between graphite electrodes in the presence of helium. The effects of the gas pressure and direct current on the fullerene yield were investigated. A maximum fullerene yield of 8/100 was found in the raw soot after evaporation of graphite with 60 A direct current under a helium pressure of 8 kPa. The fullerenes were characterized by UV spectroscopy, mass spectroscopy and X-ray Diffraction. Typical data obtained with used techniques are shown.