Preparation method of vulcanized MIL-88B (Fe) composite material and application of vulcanized MIL-88B (Fe) composite material in photocatalytic nitrogen reduction
By growing FexSy in situ on MIL-88B(Fe), a stronger binding force MIL-88B(Fe)@FexSy composite was prepared, which solved the problem of easy recombination of photogenerated electrons and holes and poor nitrogen adsorption capacity, and achieved efficient photocatalytic nitrogen reduction performance.
CN120243127APending Publication Date: 2025-07-04CHINA THREE GORGES UNIV +1
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Patent Information
- Application Number
- CN202510243418.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2025-07-04
AI Technical Summary
Technical Problem
In the field of photocatalytic nitrogen reduction, existing semiconductor photomaterials are prone to recombination with photogenerated electrons and holes and have poor nitrogen adsorption capabilities, which limits their development.
Method used
MIL-88B(Fe) is used as the vulcanization framework to provide more reaction sites by growing FexSy in situ, and the composite material MIL-88B(Fe)@FexSy is prepared by electrodeposition method to enhance the binding force and light absorption capacity of the material.
Benefits of technology
The photocatalytic nitrogen reduction performance is significantly improved, and the NH4+ yield reaches more than 7 times that of pure MIL-88B (Fe). The composite catalyst is strong in stability and can be recycled.
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Abstract
The invention relates to a preparation method of an MIL-88B (Fe) composite material and application of the MIL-88B (Fe) composite material in photocatalytic nitrogen reduction. The field focuses on preparation of metal organic framework derived materials and photocatalytic conversion technologies. MIL-88B (Fe) is adopted as a core catalyst, the composite material MIL-88B (Fe)-coated FexSy is successfully prepared through in-situ vulcanization by a rapid and simple electro-deposition vulcanization method, the MIL-88B (Fe)-coated FexSy serves as a vulcanization framework, more reaction sites are provided for in-situ growth of the FexSy, and variable valence metal Fe serves as a reaction center for reducing nitrogen into ammonia products. Meanwhile, the FexSy grows uniformly on the metal frame by using an electro-deposition method, and the bonding force between the compounds is stronger and more stable. Under a solid-liquid reaction condition, after 2 hours of light treatment, the SMFe-5 composite material shows excellent photocatalytic performance, nitrogen is successfully reduced to NH4 < + >, and the yield of NH4 < + > is up to 73.08 [mu] mol.g <-1 >, which is about more than 7 times of that of a single MIL-88B (Fe) catalyst and more than 4 times of that of a single FexSy catalyst.
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