A ZIF-67(C) / g-C3N4 heterojunction photocatalyst, its preparation method, and its application in antibiotic degradation.

By preparing a ZIF-67(C)/g-C3N4 heterojunction photocatalyst, and utilizing the CN-framework-encapsulated zero-valent cobalt and the Co3O4/g-C3N4 pn heterojunction, the problem of poor degradation effect of macrocyclic lactone antibiotics by existing photocatalytic materials was solved, achieving efficient, economical and environmentally friendly antibiotic degradation.

CN122124842APending Publication Date: 2026-06-02BEIJING FORESTRY UNIVERSITY +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING FORESTRY UNIVERSITY
Filing Date
2026-04-27
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing photocatalytic materials have poor performance in activating permonosulfate (PMS), especially for macrolide antibiotics, where the degradation effect depends on high doses and there is a risk of secondary pollution. It is difficult to ensure removal efficiency while also taking into account economy and environmental friendliness.

Method used

A ZIF-67(C)/g-C3N4 heterojunction photocatalyst was prepared by pre-calcining ZIF-67 to form a CN-framework-encapsulated zero-valent cobalt, which was then mixed with melamine and calcined to form a Co3O4/g-C3N4 pn heterojunction, thereby enhancing the photocatalytic degradation performance of the catalyst.

Benefits of technology

It can achieve efficient degradation of tylosin at low doses, with a degradation rate of no less than 95%, and maintains stability at low concentrations, reducing the amount of oxidant used and the risk of secondary pollution.

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Abstract

This invention belongs to the field of photocatalytic material preparation and antibiotic degradation technology, specifically relating to a ZIF-67(C) / g-C3N4 heterojunction photocatalyst, its preparation method, and its application in antibiotic degradation. This invention involves pre-calcining ZIF-67 to generate CN-framework-encapsulated zero-valent cobalt, which is then mixed with melamine and calcined to form the ZIF-67(C) / g-C3N4 heterojunction photocatalyst. This catalyst not only contains CN-framework-encapsulated zero-valent cobalt, Co3O4, and g-C3N4, but also forms a Co3O4 / g-C3N4 p-n heterojunction, exhibiting a synergistic activation effect on PMS, thus enhancing the catalyst's catalytic degradation effect on antibiotics. At a low dosage of 0.2 g / L, this catalyst can essentially completely degrade tylosin in water within 10 minutes.
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