A sulfur-doped core-shell heterostructure multiphase Fenton catalyst, its preparation method and application

By constructing a sulfur-doped core-shell heterostructure heterostructure multiphase Fenton catalyst, the problem of low ROS generation and utilization efficiency in the multiphase Fenton oxidation process is solved, and levofloxacin is efficiently removed in the water environment, avoiding iron sludge pollution and supporting the simple recovery of the catalyst.

CN117123277BActive Publication Date: 2025-07-22HUAZHONG AGRI UNIV
View PDF 4 Cites 0 Cited by

Patent Information

Application Number
CN202310902006.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-07-21
Publication Date
2025-07-22
Estimated Expiration
2043-07-21

AI Technical Summary

Technical Problem

In the existing heterogeneous Fenton oxidation process, the generation efficiency of reactive oxygen species (ROS) is low and utilization efficiency is low, making it difficult to effectively remove levofloxacin in the water environment, and the traditional Fenton system has iron sludge pollution problems.

Method used

A one-step hydrothermal method was used to synthesize sulfur-doped core-shell heterostructure heterostructure multiphase Fenton catalyst, using zirconium-based metal organic framework UIO-66 as the shell, and polyvinylpyrrolidone-coated iron tetroxide as the core, to build a core-shell structure, improve Fe(II)/Fe(III) cycle efficiency and ROS generation efficiency, and enhance pollutant enrichment performance through the porous characteristics of MOF.

Benefits of technology

The efficient adsorption and degradation of levofloxacin was achieved, with an adsorption capacity of 141.44 mg/g, a degradation efficiency of 97.7%, and remained above 90% after 5 cycles, avoiding iron sludge pollution and achieving simple recovery of catalysts.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN117123277B_ABST
    Figure CN117123277B_ABST
Patent Text Reader

Abstract

The invention discloses a preparation method and application of a sulfur-doped core-shell heterogeneous structure multiphase Fenton catalyst, belonging to the technical field of multiphase Fenton catalysis. The material is composed of clusters formed by polymerizing iron oxide nanoparticles with polyvinylpyrrolidone to construct the core of the material. The shell layer and the components doped in the core are thiolated zirconium-based metal-organic framework materials constructed with mercapto terephthalic acid and zirconium oxychloride octahydrate as structural monomers. A novel multiphase Fenton catalyst with both core-shell and doping characteristics is prepared by a multi-step one-pot method. In addition, the invention also discloses the application of the material in the adsorption and degradation of levofloxacin. On the premise of ensuring high H2O2 catalytic activity, the adsorption performance is used to enrich levofloxacin, so as to achieve the efficient generation and utilization effect of reactive oxygen species. The magnetism of iron oxide is beneficial to the reuse of the material, avoiding the inactivation problem of Fe active sites in the traditional Fenton oxidation process and the secondary pollution to the environment caused by the generation of iron mud.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Core / shell-type iron-based metal organic framework photo-Fenton catalyst, preparation and application thereof

    CN105833915A

  • Magnetic MOFs adsorbent material for adsorbing antibiotics in water body

    CN107570116A

  • Method for efficiently and quickly removing As(III) or As(V) based on magnetic core-shell bimetal MOF

    CN113060820A

  • Heterogeneous Fenton catalyst, preparation method thereof and wastewater treatment method

    CN113842924A