Preparation method of ultrathin two-dimensional oxygen vacancy-rich cobalt oxide and application of ultrathin two-dimensional oxygen vacancy-rich cobalt oxide in food total antioxidant capacity detection

The preparation of ultrathin two-dimensional cobalt oxide nanosheets rich in oxygen vacancies by hydrothermal method solves the problem of insufficient sensitivity in the detection of ascorbic acid in the prior art, realizes efficient and rapid detection of ascorbic acid concentration in food, and shows broad application prospects.

CN121627064APending Publication Date: 2026-03-10HEFEI UNIV OF TECH
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Patent Information

Application Number
CN202511874087.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-12
Publication Date
2026-03-10

AI Technical Summary

Technical Problem

Existing technologies are insufficient for efficiently and sensitively detecting the concentration of ascorbic acid in food, and methods for controlling surface defects in nanoenzyme catalytic materials have not adequately optimized their enzyme-mimicking catalytic performance.

Method used

Ultrathin cobalt-based nanosheets were prepared by hydrothermal method, and ultrathin two-dimensional cobalt oxide nanosheets rich in oxygen vacancies were obtained by high-temperature pyrolysis. By utilizing defect engineering to precisely control the electronic state and adsorption properties of the material surface, a colorimetric sensor was constructed for detection.

Benefits of technology

It achieves highly sensitive, rapid, and simple detection of ascorbic acid with a detection limit as low as 0.003 μM, exhibits excellent catalytic performance and good selectivity, and is suitable for food composition analysis and quality and safety control.

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Abstract

The invention relates to a preparation method of ultrathin two-dimensional cobalt oxide rich in oxygen vacancies and an application of the ultrathin two-dimensional cobalt oxide rich in oxygen vacancies in food total antioxidant capacity detection, and belongs to the fields of low-dimensional nano materials, biological mimic enzyme catalysis and analytical chemistry. According to the preparation method, cobalt acetylacetonate and hexadecyl trimethyl ammonium bromide are adopted as raw materials, and the ultrathin two-dimensional cobalt oxide nano-enzyme rich in oxygen vacancies is prepared through a hydrothermal reaction and high-temperature pyrolysis. The obtained ultrathin two-dimensional cobalt oxide nano-enzyme rich in oxygen vacancies has excellent peroxidase-like catalytic activity and selectivity. The oxygen-vacancy-rich metal oxide has the advantages of high stability, easy mass production and low preparation cost, and is expected to be widely used in the fields of biosensing, agriculture, food engineering, catalysis and the like.
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