Chlorogenic acid electrochemical sensor based on three-dimensional inverse opal structure ZnS / La@NC composite material and preparation method and application thereof

By constructing a three-dimensional inverse opal structure ZnS/La@NC composite material, the problems of low active site utilization and simple pore structure in existing chlorogenic acid electrochemical sensors are solved, realizing the detection of chlorogenic acid with high sensitivity, low detection limit and excellent stability, which is suitable for rapid detection of food and medicinal plant samples.

CN122193341APending Publication Date: 2026-06-12XIANGTAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XIANGTAN UNIV
Filing Date
2026-03-31
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

Existing chlorogenic acid electrochemical sensors suffer from problems such as low utilization of active sites, insufficient electron transfer efficiency, poor anti-interference ability, and poor stability in complex matrices. In particular, during high-temperature pyrolysis, the metal active sites are prone to agglomeration and the simple pore structure leads to low mass transfer efficiency.

⚗Method used

A three-dimensional inverse opal structure ZnS/La@NC composite material is used. By electrostatically adsorbing lanthanum ions through sulfonated polystyrene microspheres and anchoring the metal active centers in situ through sulfurization, combined with sulfur/nitrogen co-doping and rare earth element doping, a three-dimensional through-pore structure is constructed to achieve high dispersion and stable anchoring of the metal active centers.

🎯Benefits of technology

It significantly improves the sensor's detection sensitivity and selectivity for chlorogenic acid, and features a low detection limit, wide linear range, and excellent anti-interference ability, making it suitable for rapid and sensitive detection of chlorogenic acid in food and medicinal plants.

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Abstract

The application discloses a chlorogenic acid electrochemical sensor based on a three-dimensional inverse opal structure ZnS / La@NC composite material and a preparation method and application thereof. First, sulfonated polystyrene microspheres are prepared, lanthanum ions are loaded through electrostatic adsorption, and then a ZIF-8 layer is in-situ grown through solvent evaporation induced self-assembly, and a three-dimensional inverse opal structure sulfur / nitrogen co-doped porous carbon composite material 3D-M-ZnS / La@NC is obtained after high-temperature pyrolysis. During the pyrolysis process, the sulfur source released by the polystyrene microspheres and the zinc derived from ZIF-8 in-situ generate ZnS, effectively anchoring the metal active sites and inhibiting metal aggregation. The obtained composite material has three-dimensional through-hole structure, heteroatom doping and highly dispersed ZnS / La bimetallic active centers. The electrochemical sensor based on the material has a wide linear range (0.001 µM-3 µM), a low detection limit, good stability and anti-interference ability for chlorogenic acid detection, and can be used for rapid and sensitive detection of chlorogenic acid in food and medicinal plants.
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