Evolution in the formation of graphene nanocapsules from coal tar pitch

摘要

It has recently been reported that coal tar pitch(CTP)can be utilised as raw material for the production of graphene nanocapsules(GNCs)because it is formed by a great quantity of aromatic organic compounds(which promote the rearrangement of double bonds by a process of polymerisation).Due to the importance of graphene and the search for a non-expensive methodology to produce it,this work used CTP to synthesise GNCs using an in situ activation technique at low temperatures and evaluating the effect of the working temperature on the formation of such nanostructures.In other words,analysing the form of the particle as the temperature rises from 600 to 900℃.As result of the experimentation,powders were obtained and analysed by the techniques of X-Ray Diffraction,Raman Spectroscopy and Microscopy,employing Field Fmission Scanning Electron Microscopy by normal mode as well as by Scanning Transmission Electron Microscopy and a High-Resolution Scanning Electron Microscopy.The results show that working with temperatures between 800 and 850℃promotes the production of GNCs,considering that their size reduces as the working temperature rises.