Copper nanoparticle cluster loaded electrochemical sensor and preparation method thereof

Abstract

The invention discloses a copper nanoparticle cluster loaded electrochemical sensor and a preparation method thereof. The sensor mainly comprises a glassy carbon electrode, an SPAEK-6F-BI (sulfonated polyaryletherketone-6F-benzimidazole) polymer thin-layer template precursor and carrier film adopting a hexafluorobisphenol A and benzimidazole structure and a copper nanoparticle cluster loaded high-electrocatalytic-activity film. The electrochemical sensor provided with a copper nano particle cluster modified electrode and prepared with the method having all mentioned advantages and effects has a remarkably enhanced electro-catalytic reduction effect on H2O2, and the sensor manufacturing repeatability is high; when the electrochemical sensor is used for H2O2 electrochemical analysis, the response sensitivity is high, the test stability and repeatability are good, and the electrochemical sensor can be used for quickly and accurately analyzing the content of low-concentration H2O2.

Description

technical field [0001] The invention belongs to the technical field of electroanalytical chemistry, and specifically relates to an electrochemical sensor of copper nano particle clusters and a preparation method thereof. Background technique [0002] The key component that determines the level of electrocatalytic activity in electrochemical catalysis is the working electrode, that is, the electrochemical sensor, which is the "heart" of the electrochemical catalysis system. Commonly used solid electrodes such as glassy carbon, gold, and platinum cause contamination and passivation of the electrode surface due to the adsorption of electrocatalytic reaction products on the electrode surface, or due to physical and chemical changes on the electrode surface itself after long-term use, even after each measurement After cumbersome operations such as manual mechanical polishing, it is impossible to obtain a completely and effectively updated catalytically active surface, resulting i...

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Problems solved by technology

However, the copper nanoparticles electrochemical sensors prepared by traditional modification methods and technologies cannot be repeated due to the complexity of the preparation process or uncontrollable conditions, or because the copper nanoparticles are easy to agglomerate or fall off on the electrode surface. The reproducibility and stability are still not high in practice, and the accuracy of the results is still poor

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