| In recent years, with the rapid development of nanotechnology and wide application in the field of high-tech, nanomaterials have received considerable attention. Carbon nanocages, have many special characteristics different from other nanomaterials, and thus have become the highlight of many technologies. Carbon encapsulated-iron (Fe@C) nanoparticles have been successfully synthesized by chemical vapor decomposition of iron pentacarbonyl and ethanol. Hollow carbon nanocages are obtained through removing the metal template by acid treatment. The present in-situ template approach is much simpler than previous ones involving separate preparation of template materials and suitable for large-scale production.The synthesis process of Fe@C particles has been investigated and the effect of experimental conditions on their formation has been studied, including reaction temperature, iron pentacarbonyl/ethanol ratio, reactant flow rate, and gas flow rate. The Fe@C particles have been characterized by transmission electron microscope (TEM), high resolution transmission electron microscope (HRTEM), and X-ray diffraction (XRD). The results reveal that the reaction temperature has the greatest effect on formation of Fe@C particles. At a lower temperature (500 oC), carbon nanocages are amorphous, and have a narrow range of diameters(5-30 nm) and, a...
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