High-Performance, non-Enzymatic Glucose Sensor Based on Fe and Cu Doped ZnO/rGO Based Nanocomposite

In the present work, the fabrication and performance of glucose sensor based on zinc oxide (ZnO) nanoparticles (NPs) and their composite is demonstrated. ZnO nanostructures possess fascinating properties like large surface area, superior crystal nature and good electrical as well as optical properties. Co-precipitation method was used to fabricate ZnO NPs, iron doped and copper doped ZnO NPs and their composite with reduced graphene oxide (rGO). The structural parameters of pure and doped samples were investigated by X-ray diffraction method. Functional group study of the sample was carried out by fourier transform infrared spectroscopy. Morphological study of bare ZnO, iron doped ZnO, copper doped ZnO and their composite with rGO were studied by SEM. XRD pattern showed that ZnO had hexagonal wurtzite structure. The studies of electrochemical properties of the electrode using cyclic voltammetry showed that prepared samples were promising for the development of cost effective and non-enzymatic electrochemical based glucose sensor with excellent characteristics. The prepared iron doped ZnO/rGO based composite signify greater sensitivity and greater electrocatalytic activity than rest of the composition considered in current study.