A composite copper cobalt oxide material with self-supporting structure prepared on copper foil using electrochemical reduction assisted composite deposition method and its application in glucose sensor

By fabricating a copper-cobalt oxide self-supporting composite electrode on copper foil, the problems of stability of nanomaterials and catalytic layer shedding in enzyme-free glucose sensors were solved, achieving high sensitivity and long-term stable glucose detection.

CN122303987APending Publication Date: 2026-06-30EAST CHINA UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
EAST CHINA UNIV OF SCI & TECH
Filing Date
2026-03-02
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing enzyme-free glucose sensors face problems such as insufficient catalytic activity and stability of nanomaterials, easy shedding of the catalytic layer, poor conductive contact, and poor anti-interference ability, especially insufficient selectivity in complex physiological environments.

Method used

A self-supporting composite electrode material of copper-cobalt oxide reduced with sodium borohydride is formed by preparing a copper-cobalt oxide precursor on copper foil and performing electrochemical treatment to form a self-supporting composite structure, thereby improving the conductivity and catalytic activity of the material.

Benefits of technology

It significantly improves the electrocatalytic oxidation performance of glucose sensors, enhances mechanical stability and catalytic interface durability, achieves a detection sensitivity of 3050 μA/(mM·cm2), exhibits excellent linear response, and solves the problem of easy detachment of traditional powder materials.

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Abstract

This invention discloses a highly active, self-supporting electrode material for an enzyme-free glucose sensor, its preparation method, and its application. The material is a copper-cobalt oxide composite nanomaterial fixed on a copper foil substrate after reduction treatment with sodium borohydride. First, a precursor CuCo oxide is prepared via a molten salt method. Then, the powder is simultaneously reduced in situ with sodium borohydride solution while copper foil is added and electrochemically treated. The sodium borohydride treatment partially reduces the valence state of the metal ions, introducing abundant oxygen vacancies and defects onto the material surface, significantly enhancing its electrocatalytic activity. Simultaneously, the electrochemical treatment fixes the reduced powder onto the copper foil surface. This method allows for the rapid construction of a high-performance enzyme-free glucose electrochemical sensor.
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