HIGH RESOLUTION SOLID STATE NMR STUDIES OF GRAPHENE OXIDE AND REDUCED GRAPHENE OXIDE

摘要

Graphene possesses a large surface area and high electrical/thermal conductivity as well as excellent mechanical properties. From solid state NMR point of view, graphene is the system which provide both challenge and new opportunity. The challenge come from the fact that there is no proton in the system so the routing and efficient solid NMR method like cross polarization and dipolar decoupling can not be used here. Also the relaxation time for the carbon sheet is very long. The new opportunity come from the intermolecular cross polarization for the graphene or graphene oxide (GO)/polymer composite. The intermolecular CP is not only help to characterize the purity of the reduction of the graphene oxide samples but also provide the miscibility and the sheet thickness information.