Bismuth ferrite / bismuth vanadate photo-fenton catalyst, preparation method and wastewater treatment device

By preparing and loading bismuth ferrite/bismuth vanadate photo-Fenton catalysts onto the substrate surface, the problem of Fe3+/Fe2+ cycle obstruction in traditional Fenton technology was solved, realizing efficient treatment and resource utilization of pesticide wastewater, and improving the efficiency of light energy utilization and the system's automated operation capability.

CN122124807APending Publication Date: 2026-06-02HEILONGJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HEILONGJIANG UNIV
Filing Date
2026-04-29
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

In traditional Fenton technology, the Fe3+/Fe2+ cycle conversion is hindered, resulting in low catalytic efficiency and difficulty in effectively treating pesticide-polluted wastewater generated during agricultural irrigation.

Method used

A bismuth ferrite/bismuth vanadate photo-Fenton catalyst is used and loaded onto the substrate surface via a sol-gel method to form a BiFeO3/BiVO4 heterojunction. The separation of photogenerated carriers and the reduction of Fe3+ to Fe2+ promote the Fenton cycle. Combined with the wavelength selectivity of the light source, different active species are generated to degrade pesticides.

Benefits of technology

It achieves catalyst immobilization and resource utilization, solves the problem of easy loss of powdered catalysts, significantly improves light energy utilization efficiency and the automated operation capability of water treatment systems, can efficiently remove different types of pesticides, and is suitable for large-scale, long-term agricultural non-point source pollution control.

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Abstract

This invention discloses a bismuth ferrite / bismuth vanadate photo-Fenton catalyst, its preparation method, and a wastewater treatment device, belonging to the field of wastewater treatment technology. This invention prepares the bismuth ferrite / bismuth vanadate photo-Fenton catalyst via a sol-gel method, which can solve the problem of Fe in traditional Fenton technology. 3+ / Fe 2+ In addition to addressing the technical problem of cyclic obstruction, the photo-Fenton catalyst of this invention has the characteristic of wavelength-selective degradation, which can generate different active species under light conditions with wavelengths <450nm and wavelengths >600nm respectively, thereby achieving segmented and efficient removal of different types of pesticides such as imidacloprid, paraquat, carbofuran, and methomyl from wastewater.
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