Three-dimensional nitrogen-doped carbon sponge-supported magnetic Fe3O4 composite material and preparation method

By loading magnetic Fe3O4 nanoparticles on a carbon sponge skeleton to support a three-dimensional nitrogen-doped carbon sponge-supported magnetic Fe3O4 composite material, the problems of high energy consumption and unstable photothermal performance in seawater desalination technology are solved, and efficient solar-driven seawater desalination and organic pollutant degradation are achieved, with stable photothermal conversion capability and high photocatalytic efficiency.

CN117019201BActive Publication Date: 2025-10-03CHINA UNIV OF GEOSCIENCES (WUHAN)
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Patent Information

Application Number
CN202311108129.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-08-30
Publication Date
2025-10-03
Estimated Expiration
2043-08-30

AI Technical Summary

Technical Problem

Existing seawater desalination technology has high energy consumption and low efficiency, and the solar-driven composite hydrogel material has unstable photothermal performance under harsh environments, leading to water pollution and making it difficult to meet the needs of green and efficient applications.

Method used

A three-dimensional nitrogen-doped carbon sponge is used to support a magnetic Fe3O4 composite material. By loading magnetic Fe3O4 nanoparticles on the carbon sponge skeleton, the three-dimensional network structure and nitrogen doping of the carbon sponge are utilized to improve the photothermal conversion performance, and the magnetic Fe3O4 is used to catalyze the degradation of organic pollutants in seawater.

Benefits of technology

It has achieved efficient solar-driven seawater desalination and organic pollutant degradation, with a photothermal conversion efficiency of up to 93.21% and a catalytic degradation effect of over 96%. The preparation process is simple and low-cost, and the material has good stability.

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Abstract

The present invention provides a three-dimensional nitrogen-doped carbon sponge-supported magnetic Fe₃O₄ composite material and its preparation method. The three-dimensional nitrogen-doped carbon sponge-supported magnetic Fe₃O₄ composite material uses a carbon sponge as a porous matrix, with magnetic Fe₃O₄ supported on the surface of the carbon sponge's skeletal structure. The carbon sponge forms a nitrogen-doped three-dimensional bridged structure. The preparation method comprises soaking the sponge in an aqueous solution of magnetic Fe₃O₄ nanoparticles for a predetermined period of time, drying, and then calcining the sponge to carbonize it, thereby obtaining the three-dimensional nitrogen-doped carbon sponge-supported magnetic Fe₃O₄ composite material. The sponge is a commercially available sponge containing a nitrogen source. The preparation method is simple and efficient, and the resulting three-dimensional nitrogen-doped carbon sponge-supported magnetic Fe₃O₄ composite material exhibits both stable light-to-heat conversion capabilities and high photocatalytic efficiency.
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