The Effect Of Carbonaceous Debris On The Electrochemical Behaviors Of Graphene

In this thesis, the main research focuses on the application of the reduction of graphene oxide. It has two application areas which is applied to nonenzymatic amperometric glucose biosensors and electrochemical capacitances. In the part of these experiments, we investigated on how to synthesize graphene oxide electrodes with MB, and the differences of different methods of reducing graphene oxide. Detailed contents are as follows:(1) We prepared graphene oxide by modified Hummers method. But the product of this kind of modified method has carbonaceous debris. Carbonaceous debris contained in graphene oxide impact on their electrochemical capacitances. Meldola’s Blue(MB) functionalized graphene oxide with and without carbonaceous debris nanocomposite film electrode was prepared by adsorbing MB on the surface of a graphene modified glassy carbon electrode. We compared the graphene oxide and graphite oxide with MB modified electrode for catalytic NADH 、AA、AP oxidation. This electrode shows good electrochemical performance for the detection of glucose.(2) We prepared graphene oxide by modified Hummers method. Then we treated it with sodium hydroxide solution to remove the carbonaceous debris. And then we used excessive HC l to make black aggregate thoroughly to be protonated. At the meantime, we compared the product of chemical reduced graphene with the product of t hermal annealing graphite oxide. The consequence suggests that the reduction of graphene oxide of chemical method has better electrochemical performance and it could be a good electrical condenser.