Nano silver-copper oxide particle/graphene-based preparation method of non-enzyme electrochemical glucose sensor

Abstract

The invention relates to a nano silver-copper oxide particle / graphene-based preparation method of a non-enzyme electrochemical glucose sensor. The preparation method comprises the following steps: (1) respectively weighing silver salt and copper salt, and dissolving the silver salt and copper salt into water for mixing, so as to obtain a silver-copper precursor solution; (2) dispersing graphene oxide in deionized water, so as to obtain a graphene oxide dispersion liquid; (3) mixing the silver-copper precursor solution with the graphene oxide dispersion liquid, adjusting the pH value, performing hydrothermal reaction, separation and drying, so as to obtain a Ag-CuO nano particle / graphene composite material, and dispersing the material in anhydrous ethano; (4) dropwise adding standby suspension onto a glass carbon electrode, and drying the electrode, so as to obtain Ag-CuO nano particle / graphene electrode; (5) forming a three-electrode system by the Ag-CuO nano particle / graphene electrode, a counter electrode and a reference electrode, connecting the three-electrode system with an electrochemical working station to form an electrochemical sensor which is a target product. Compared with the prior art, the sensor prepared through the preparation method is high in sensitivity to detection of glucose, low in detection limit, wide in detection range, low in cost, environmentally-friendly, harmless and the like.

Description

technical field [0001] The invention relates to the field of electrochemical analysis and detection, in particular to a method for preparing an enzyme-free electrochemical glucose sensor based on nano silver-copper oxide particles / graphene. Background technique [0002] Glucose is the most widely distributed and most important monosaccharide in nature. Glucose sensor is a common biosensor, and it is also the biosensor with the most extensive research, the fastest development and the earliest commercialization. It has been widely used in clinical detection, biological analysis, environmental monitoring and food safety industry and other fields. According to different detection methods and means, it can be divided into various glucose sensors such as electrical, optical and mechanical. Among them, electrochemical sensors have attracted extensive attention due to their low fabrication cost, simple and repeatable fabrication process, and good sensing performance. [0003] At p...

AI Technical Summary

Problems solved by technology

Although noble metal-based sensors have high sensitivity, their stability is poor and the cost is high. Although pure transition metal-based sensors have high reactivity, their low conductivity limits the further improvement of sensing performance.

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