A multi-electrode photoelectrocatalytic device and its application in high-concentration wastewater treatment.

By constructing a three-electrode photoelectrocatalytic system and utilizing the separation of H2O2 generation and activation units, high-concentration Cr(VI) and organic pollutants were efficiently removed, solving the problem of difficult recovery in existing technologies and providing a novel pollutant removal method that is easy to recover.

CN118405765BActive Publication Date: 2025-12-02ZHEJIANG GONGSHANG UNIVERSITY
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Patent Information

Application Number
CN202410625400.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-05-20
Publication Date
2025-12-02
Estimated Expiration
2044-05-20

AI Technical Summary

Technical Problem

Existing dual-electrode photoelectrocatalytic systems are difficult to effectively treat high concentrations of Cr(VI) and organic pollutants, such as ciprofloxacin, and traditional powder photocatalysts are difficult to recover.

Method used

A three-electrode photoelectrocatalytic system was constructed, including a PTFE/TiO2/Ni-MOF/PDA@C cathode, a MIL-101(Fe)-CC photocathode, and a WO3 photoanode. H2O2 was generated through photogenerated electron transfer, and H2O2 was activated to generate ·OH through a Fenton-like reaction, thereby removing pollutants.

Benefits of technology

This method achieves efficient removal of high concentrations of Cr(VI) and organic pollutants at the mM level, and the system is easy to recycle, avoiding the recycling problems of traditional powder photocatalysts and providing a novel pollutant removal method.

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Abstract

This application discloses a multi-electrode photoelectrocatalytic device and its application in the treatment of high-concentration wastewater. The photoelectrocatalytic device includes a main reaction tank, an electrode fixing cover, wires, a photoanode, a photocathode, and an electrode cathode. The photoanode is a WO3 electrode; the photocathode is a MIL-101(Fe)-CC electrode, which activates hydrogen peroxide; and the electrode cathode is a PTFE / TiO2 / Ni-MOF / PDA@C electrode, which generates hydrogen peroxide. The treatment system and method of this invention have good treatment effects on both heavy metals and organic pollutants, and exhibit high chemical stability.
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