Layered lattice iron bifunctional catalyst, preparation method therefor, and use thereof

By preparing a layered lattice iron bifunctional catalyst with a unique pore structure and Al-O-Fe covalent bonds, the problems of low efficiency and iron leaching of Fenton catalysts in the treatment of low-concentration wastewater were solved, achieving efficient and stable degradation of organic pollutants and catalyst recycling.

WO2026137671A1PCT designated stage Publication Date: 2026-07-02BEIJING UNIV OF CHEM TECH
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
BEIJING UNIV OF CHEM TECH
Filing Date
2025-05-12
Publication Date
2026-07-02

AI Technical Summary

Technical Problem

Existing Fenton catalysts are inefficient when treating low-concentration real wastewater, and iron-based active species are easily dissolved in the low pH range, leading to a decline in catalyst degradation and recycling performance.

Method used

By employing a layered lattice iron bifunctional catalyst, layered structural materials are dispersed and their size controlled through a nucleation reactor, and Al-O-Fe covalent bonds are formed by high-temperature calcination. This process prepares a catalyst with a unique pore structure and a large specific surface area, enabling the adsorption-Fenton coupling degradation of organic pollutants.

Benefits of technology

It improves the efficiency of Fenton oxidation degradation, reduces the amount of iron leaching, enables the continuous use of catalyst and efficient removal reaction, and eliminates the need for acid and alkali elution, making the operation simple and environmentally friendly.

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Abstract

The present application provides a layered lattice iron bifunctional catalyst, a preparation method therefor, and a use thereof. The preparation method comprises: mixing a layered structural material with deionized water to obtain a slurry; adding the slurry to a nucleation reactor for vigorous stirring, and cyclically stirring multiple times; then collecting the slurry for centrifugation, and vacuum-drying the obtained solid material to obtain a purified material; and calcining the obtained material at a high temperature for structural evolution to activate the material, thereby obtaining a layered lattice iron bifunctional catalyst. The layered lattice iron bifunctional catalyst provided in the present application has a unique pore-channel structure, a large specific surface area, and a wide pore size distribution, enabling effective adsorption and enrichment of organic pollutants in water, providing a driving force for Fenton oxidative degradation of low-concentration organic pollutants, and improving the efficiency of Fenton oxidative degradation. The layered lattice iron exists in the catalyst in the form of aluminum–oxygen–iron covalent bonds, which enhances the stability of iron. During the oxidative degradation process, the amount of iron leached is extremely low, and no iron sludge is generated, facilitating continuous treatment of large volumes of wastewater and cyclic use of the catalyst.
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