Application Of Graphene Composites To Nonenzymatic Glucose Sensors

The development of high performance non-enzymatic glucose sensor requires the development of high activity catalyst to promote electrocatalytic glucose oxidation(EGO),which is the key to non-enzymatic glucose sensing.Pt and other precious metals are the most active EGO catalysts,but their scarcity and high cost greatly limit their practical applications.Graphene has a high specific surface area and high electron fluidity,so graphene or its derivatives can be used as the best choice for anchoring a series of nanomaterials.Adding nanoparticles of metals and oxides to graphene films gives the"enhanced"films more active sites and improves their electron transport rate,which is beneficial for the performance of devices using the material.In this paper,GO was prepared by chemical redox method,and XRD and TEM analysis were used to determine the successful preparation of RGO with excellent properties.Then the CuO/RGO and CuO/NSG composites were prepared by two-step solvent heat method.XRD,TEM,XPS,Raman and TGA were used to characterize the structure and morphology of the prepared materials,and the CuO/RGO and CuO/NSG composites with excellent properties were determined to be successfully prepared.Then composites treated adhere to the working electrode electrochemical workstation(glassy carbon electrode)on the material of the electrical activity of the catalytic oxidation of glucose,resistance,sensitivity and stability test and analysis,it is concluded that CuO/NSG/GCE than CuO/RGO/GCE better activity of EGO,CuO/NSG/GCE shows than CuO/RGO/GCE?(432)the smaller the charge transfer resistance for?(278),and calculate the CuO/NSG/GCE sensitivity is about1722?A/mM/cm~2,This is higher than the CuO/RGO/GCE 1003?A/mM/cm~2,and the CuO/NSG/GCE maintains a high stability of 95.8%of its original current response after half A month of storage,while the CuO/RGO/GCE has a high stability of 92%of the original current response.