A method for degrading acetaminophen in water by activating persulfate with an axial oxygen-coordinated iron monatomic catalyst

By activating persulfate with an axially oxygen-coordinated iron single-atom catalyst (Fe-N4O1), the problem of insufficient activation capacity of existing Fe-NC materials was solved, and efficient degradation of acetaminophen was achieved, showing significant degradation effect and broad application prospects.

CN122301353APending Publication Date: 2026-06-30HUNAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUNAN UNIV
Filing Date
2026-03-20
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing Fe-NC materials have limited activity due to the symmetry of the Fe-N4 coordination structure, making it difficult to efficiently activate persulfate. Furthermore, their small specific surface area and limited number of active sites make it difficult to efficiently remove acetaminophen from water.

Method used

An axial oxygen-coordinated iron single-atom catalyst (Fe-N4O1) is used, anchored in a carbon substrate with the Fe-N4O1 coordination structure. It is prepared by pyrolysis of ZIF-8 and iron acetylacetone. It has a higher specific surface area and abundant functional groups, which promotes electron transfer, generates more active species, and achieves efficient degradation of acetaminophen.

Benefits of technology

It achieves complete removal of acetaminophen within 2 minutes, and has the advantages of simple process, easy operation, high efficiency, wide applicability, and no secondary pollution, demonstrating a highly efficient degradation effect.

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Abstract

This invention discloses a method for degrading acetaminophen in water using persulfate activated by an axially oxygen-coordinated iron single-atom catalyst. The method uses the axially oxygen-coordinated iron single-atom catalyst as an activator to activate persulfate and degrade acetaminophen in water. The axially oxygen-coordinated iron single-atom catalyst comprises a carbon substrate and iron single atoms, with the iron single atoms anchored in the carbon substrate in a Fe-N4O1 coordination structure. In this invention, the axially oxygen-coordinated iron single-atom catalyst is used to activate persulfate, which can efficiently activate persulfate and achieve highly efficient removal of acetaminophen from water. Complete removal of acetaminophen from water can be achieved within 2 minutes. This method has significant advantages such as simple process, easy operation, high treatment efficiency, good removal effect, wide applicability, and no risk of secondary pollution, demonstrating extremely high practical value and broad application prospects.
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