Study On Preparation And Electrochemical Performance Of Copper And Cobalt Bimetallic Compounds

Glucose is the main energy source of the human body.Excessive or low glucose concentration can affect blood sugar balance and cause some related diseases.Accurate and rapid detection of glucose is of great significance in biomedical applications and the food industry.Compared with glucose biosensors based on glucose oxidase,non-enzymatic glucose biosensors have the advantages of simplicity,speed,and stability.The performance of non-enzymatic glucose sensors largely depends on the composition and microstructure of the selected electrode material.In recent years,the substitution of transition metals for bimetallic oxides of A₃B₄ spinel-type compounds has gradually become a research hotspot,such as CuCo₂O₄.In CuCo₂O₄,due to the conductivity of Cu element,Co element has good catalytic activity for glucose.The synergistic effect improves the electrocatalytic performance of CuCo₂O₄.In this subject,a hollow spherical CuCo₂O₄ functional material was prepared and used for the electrochemical detection of glucose with good results.（1）Preparation of CuCo₂O₄ functional materials by solvothermal and calcination methods.By adjusting the amount of urea added,the reaction time and the reaction temperature,the reaction conditions are optimized and the best conditions for material synthesis are determined.Through XRD,SEM,and other characterization methods to analyze the material’s crystal composition,microscopic morphology,internal structure and element valence composition,it is finally proved that the method prepared by this method is a hollow spherical CuCo₂O₄ material with good dispersibility.The electrochemical performance of the material was tested.The experimental results show that the hollow spherical CuCo₂O₄ material has a good response to glucose,and the sensitivity is 2929.4μA m M^-1 cm^-2 in the concentration range of 2～500μM;In the concentration range of 600～1800μM,the sensitivity is 1515.9μA m M^-1 cm^-2,and the detection limit is as low as 0.27μM.In the presence of common interfering substances,the CuCo₂O₄ material has good selectivity to glucose and is an excellent electrocatalytic material for glucose.（2）The CuCo₂O₄/NF material was prepared by solvothermal and calcination methods using foamed nickel as the substrate.The element composition and micro morphology of the material were characterized by XRD,SEM,Mapping,XPS and other characterization methods,and the hollowed-out CuCo₂O₄ with bulbous flowers has successfully grown on NF.The electrochemical performance test of the material shows that the CuCo₂O₄/NF composite material has a good response to glucose.In the concentration range of 2～500μM,the sensitivity is 17888.7μA m M^-1 cm^-2;in the concentration range of 600～1600μM,the sensitivity is 3319.5μA m M^-1 cm^-2,the detection limit is as low as 0.014μM,and it has good selectivity for glucose.（3）Prepare CuCo₂S₄/NF material by in-situ vulcanization method,and determine the best synthesis conditions of CuCo₂S₄/NF by adjusting the vulcanization time.Using XRD,SEM,Mapping,XPS characterization methods,the elemental composition and micro morphology of the material were characterized,which proved that the CuCo₂O₄/NF material has been successfully vulcanized into CuCo₂S₄/NF material.The electrochemical performance of the material is tested.The experimental results show that the CuCo₂S₄/NF material has a good response to glucose.In the concentration range of 2～500μM,the sensitivity is 12217.1μA m M^-1 cm^-2;in the concentration range of 600～1600μM,the sensitivity is 4897.6μA m M^-1 cm^-2,and it has good selectivity to glucose.In this subject,a variety of functional materials based on CuCo₂O₄ materials have been prepared through different preparation methods,which have a good response to glucose,which is characterized by ultra-high sensitivity,fast response time and strong anti-interference performance.This provides new ideas for subsequent research.