III International Conference

PP-II-22№1 and №2). The same enclosing of graphitic edges in the structure of graphitic shells wasobserved only on the ends of the nanotubes.BET method’s data showed that specific surface area of samples after high temperaturetreatment similarly depends on the initial structure of carbon nanofibers. The specific surfacearea of samples №1 and №2 decreased in more than 2 times under the maximum temperatureand time of high temperature treatment. Such a tendency was not observed for texturalproperties of the carbon sample №3. It was concluded that this phenomenon is connected withsurface reconstruction. XRD method and measurements of electro-conductivity proved thatthere was a process of graphitization and improvement of electro-conductivity in carbonsamples.Complex of physical-chemical methods showed that chosen conditions of hightemperature heat-treatment do not finish the process of graphitization of carbon. Theseconditions lead to a restructuring of the surface of carbon nanofibers that effects the texturalproperties of carbon nanomaterials. Moreover, analysis of the data showed that the process ofhigh temperature heat treatment can be used for synthesis of new types of carbon materials,for elimination of defects on the surface of the multiwalled nanotubes and for removal ofresidual metal of the catalyst.204