Sulfonyl bridged calix[4]arene iron-based porous complex for extracting uranium from seawater and preparation method of complex

A technology of sulfonyl bridges and complexes, applied in the field of metal porous complex materials, can solve the problems of low specific surface area, limited adsorption capacity and selectivity of materials, and achieve large specific surface area, fast adsorption rate and good water stability Effect
CN113307981AInactive Publication Date: 2021-08-27HAINAN UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HAINAN UNIVERSITY
Publication Date
2021-08-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a preparation method of a sulfonyl bridged calix[4]arene iron-based porous complex for extracting uranium from seawater, which comprises the following steps: adding sulfonyl bridged calix[4]arene, ferric trichloride and isophthalonitrile tetrazole into a composite solvent containing ethanol and N,N-dimethylformamide, and uniformly conducting mixing; and then rapidly conducting heating in a reaction kettle, conducting reacting under a constant temperature condition, slowly conducting cooling to obtain a brown yellow blocky transparent crystal, and conducting cleaning and drying to obtain a product, wherein the molar ratio of the sulfonyl bridged calix[4]arene to the ferric trichloride to the isophthalonitrile tetrazole is 1:4:1, and the volume ratio of the ethanol to the N,N-dimethylformamide is 1:1. The porous complex material prepared by the method is a monoclinic crystal, has a cuboid structure with a cavity, and has a molecular formula of Fe4(H2O)(TC4A-SO2)]4(H2L)8. The material has a proper pore structure, unsaturated coordination sites in the bridged ligand isophthalonitrile tetrazole and uranyl ions have a complexing effect, the uranium extraction performance of the material is enhanced through mutual synergism of the unsaturated coordination sites and the uranyl ions, and the material has the advantages of being high in adsorption rate, excellent in selectivity and stability and the like.
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Description

technical field

[0001] The invention relates to a metal porous complex material, in particular to a sulfonyl bridging calix[4]arene iron-based porous complex for uranium extraction from seawater and a preparation method thereof. Background technique

[0002] Extracting uranium from seawater is essential to meet the growing demand for uranium resources from the nuclear energy industry. However, due to the complex environment of natural seawater, the concentration of uranium is low (3.3ppb, μg L -1 ) and severe marine microbial fouling have resulted in the failure of the existing uranium extraction adsorbents to be industrialized. Among them, the most widely studied uranium-extracting adsorbent is amidoxime-based material, but the biofouling in natural seawater not only greatly reduces its uranium adsorption capacity, but even destroys the structure of the adsorbent, thereby reducing the reusability of the adsorbent and increasing the uranium concentration. The economic cost...

Claims

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