Synthesis of Nanocarbon Capsules by Vapor Detonation of Pentacarbonyl Iron

In this study, the capsular carbon nanomaterials with large specific surface area are synthesized using gas phase detonation method doped with acetylene gas, oxygen and pentacarbonyl iron.The pre-experimental of the reaction for the thermal decomposition reaction of carbonyldiiron showed that the iron octacarbonyl diketones were thermally decomposed according to nine carbonyldiiron decomposed into iron pentacarbonyl and tricarbonyl dodecylcarbonyl between 60 and 140℃.The morphology and components of the synthesized nanoparticles were characterized through X-ray diffraction studies, transmission electron microscopy and physical adsorption instrument analyses.Results showed that the graphite peaks can be clearly observed in XRD pattern and the product is mainly with a structure that capsular amorphous carbon with thin layer which has graphitization tendency.The experimental product has a specific surface area of 253.857 m²/g, a pore volume of 0.940 cm³/g and an average pore size of 2.731 nm, type of the hysteresis loop of the adsorption & desorption curve is H3.The pore structure is mainly formed by the accumulation of granules and has a large specific surface area and a strong adsorption capacity.The article confirms that iron is also used as a catalyst.Acetylene cannot be used to synthesize carbon nanotubes without adding an inert gas as a buffering agent due to its high detonation velocity.