Facile synthesis of CuO-Co_(3)O_(4)prickly-sphere-like composite for non-enzymatic glucose sensors

In the field of glucose sensors,the development of inexpensive and high-efficiency electrochemical glucose sensors is the current research hotspot.In this paper,CuO-Co_(3)O_(4)composite with a prickly-sphere-like morphology is prepared by the facile hydrothermal method for the non-enzymatic electrochemical glucose detection.X-ray diffraction,scanning electron microscopy,transmission electron microscopy,energy-dispersive X-ray spec-troscopy,and X-ray photoelectron spectroscopy are used to analyze the structure,composition,and morphology of the material.In addition,the electrochemical catalytic perfor-mance of CuO-Co_(3)O_(4)to glucose is obtained by cyclic voltammetry and chronoamperometry.The excellent elec-trochemical sensing performance may be attributed to the large number of catalytic sites in the prickly-sphere-like composite and the synergistic effect of Cu and Co.Under an applied voltage of 0.55 V,CuO-Co_(3)O_(4)composite shows sensitivity to glucose(1503.45μA·(mmol·L^(-1))^(-1)-cm^(-2)),a low detection limit(21.95μmol·L^(-1)),excellent selectivity,a high level of reproducibility,and good sta-bility.This indicates that the CuO-Co_(3)O_(4)composite has a broad prospect of non-enzymatic glucose sensing application.