Preparation method and application of multi-coordination covalent organic framework material

By designing multi-coordinated covalent organic frame materials, using their efficient adsorption and separation capabilities under acidic conditions, the problems of low stability, low adsorption amount and low selectivity of existing adsorption materials in thorium adsorption are solved, and efficient adsorption and separation of thorium ions are achieved.

CN119899349AActive Publication Date: 2025-04-29HAINAN UNIV
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Patent Information

Application Number
CN202510186663.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-20
Publication Date
2025-04-29
Estimated Expiration
2045-02-20

AI Technical Summary

Technical Problem

Existing adsorption materials have low stability, low adsorption amount and low selectivity in thorium adsorption, which limits the efficient separation and enrichment of thorium.

Method used

Using multi-coordinated covalent organic framework materials, two new 2D COFs materials, TBN-TS COF and TBN-TN COF are designed through the combination of nitrogen-rich amino group monomer and sulfur-rich monomer, and the N, O and S heteroatoms in their structures are used to strong coordination interactions with Th(IV) ions to achieve efficient adsorption and separation.

Benefits of technology

Under acidic conditions, the new multi-coordinated covalent organic frame material exhibits high adsorption capacity, excellent reuse performance and ultra-fast adsorption rate, which can achieve adsorption equilibrium within 30 minutes, solving the problems of low adsorption amount and poor recycling performance of existing materials.

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Abstract

The invention discloses a preparation method and application of a multi-coordination covalent organic framework material, and belongs to the technical field of material preparation. According to the present invention, a 4, 7-bis (4-aminophenyl)-alpha-methyl-1H-benzimidazole-2-methanol monomer and a benzo [1, 2-b: 3, 4-b ': 5, 6-b'] trithiophene-2, 5, 8-trialdehyde monomer or a 2, 4, 6-tri (4-aldehyde phenyl)-1, 3, 5-triazine monomer are adopted to synthesize the novel multi-coordination 2D COFs material with thorium adsorption and thorium-uranium ion separation and selection effects through a solvothermal method; the 2D COFs material prepared by the method disclosed by the invention has a relatively large specific surface area, a regular one-dimensional open channel and abundant skeleton coordination heteroatoms. Based on strong chemical coordination, the 2D COFs material has the advantages of ultrafast adsorption rate, high adsorption capacity and adsorption selectivity and excellent cyclic regeneration performance in the application of selective adsorption and separation of thorium.
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