Preparation of Pure ZnO and CNP/ZnO nanostructures as Efficient Bio Sensor

Abstract

This study describes a promising approach for producing pure Zinc Oxide (ZnO) films and Carbon nanoparticles (CNPs) decorated ZnO (CNP/ZnO) nanostructured films for glucose sensors. Zinc oxide nanoparticles with an average particle size of (11.14 nm) were grown on Zn foil using the anodization method, while carbon nanoparticles were synthesized using the hydrothermal method. The decoration process of carbon nanoparticles on ZnO film nanocomposites was conducted using the ultrasonication method. Several tests were performed, including microstructure observation, crystallinity analysis, and electrochemical property investigation. The nanostructures were determined using energy-dispersive X-ray spectroscopy (EDX), field-emission scanning electron microscopy (FE-SEM), transmission electron microscope (TEM), UV-vis spectroscopy, photoluminescence (PL) measurements, and X-ray diffraction (XRD). The electrochemical analysis of the CNPs/ZnO nanostructures significantly refined the sensitivity to glucose compared to pure zinc oxide nanostructures. The CNP/ZnO nanostructures increased glucose sensing with a sensitivity of (2372 µA.mM^-1.cm^-2) the low detection limit is (1.15 mM), with a linear range of 0.3 mM to 1 mM.