A kind of renewable metal nanoparticle electrochemical sensor and its preparation method

Abstract

The invention discloses a renewable metal nanoparticle electrochemical sensor and a preparation method thereof. The sensor mainly comprises a bare glassy carbon electrode, a layer of sulfonated poly(aryle ether ketone) polymer cation exchange thin-layer template precursor and carrier film, and a layer of nickel nanoparticle high electric catalytic activity film. By utilizing the strong matching function and ion exchange effect of a sulfonic acid group on the sulfonated poly(aryle ether ketone) (SPAEK) thin-layer precursor film and transition metal ions, taking a nickel sulfate solution as a deposition solution, and using an in situ electrochemical reduction method, nickel nanoparticles are loaded on a SPAEK thin film modified electrode. Glucose has a significantly enhanced electric catalytic oxidation effect, and the production repeatability of the sensor is high. When the sensor is applied to glucose electrochemical analysis, the sensor has high response sensitivity, and good determination stability and reproducibility, and can be used for accurately and quickly analyzing the content of low concentration glucose.

Description

technical field [0001] The invention belongs to the technical field of electroanalytical chemistry, and specifically relates to the preparation and preparation of a renewable nanometer metal particle modified electrode electrochemical sensor which uses sulfonated polyaryletherketone cation exchange membrane (SPAEK) as a precursor and a carrier membrane. It is applied to sensitive, stable and accurate electrochemical determination of glucose concentration. Background technique [0002] The key to determining the analytical sensitivity, reproducibility and accuracy in electrochemical analysis is the working electrode, that is, the electrochemical sensor, which is the "heart" of the electrochemical analysis system. Commonly used solid electrodes such as glassy carbon, gold and platinum are polluted and passivated due to the adsorption of electrochemical reaction products on the electrode surface after analysis and testing, or due to physical and chemical changes on the electrod...

AI Technical Summary

Problems solved by technology

However, the nano-metal electrochemical sensors prepared by traditional modification methods and technologies cannot be repeated due to the complexity of the preparation process or uncontrollable conditions, or the fact that the nanoparticles are easily agglomerated or fall off on the electrode surface, which leads to the sensor being used in practical applications. reproducibility and stability are still not high, and the accuracy of the results is still poor

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