Conjugated polymer photocatalyst as well as preparation method and application thereof

By designing the CZTB conjugated polymer photocatalyst of carbazole and terephthalonitrile units, the problems of high energy consumption and poor stability in the nitric acid synthesis process were solved, realizing efficient and stable nitric acid synthesis at room temperature, avoiding metal pollution, and possessing green and environmentally friendly advantages.

CN121471492AActive Publication Date: 2026-02-06NINGBO UNIV
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Patent Information

Application Number
CN202610018793.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-08
Publication Date
2026-02-06
Estimated Expiration
2046-01-08

AI Technical Summary

Technical Problem

Existing technologies for nitric acid synthesis involve harsh conditions, high energy consumption, and significant pollution. Furthermore, the lack of metal photocatalysts results in low catalytic efficiency and insufficient stability, making it difficult to achieve efficient and stable nitric acid synthesis.

Method used

The conjugated polymer photocatalyst CZTB was prepared by forming a D–A type conjugated framework with carbazole and terephthalonitrile units. Visible light was used to excite electron-hole pair separation, and the porous structure was combined to improve the gas adsorption capacity, thereby realizing the activation and oxidation of N2 to generate nitric acid.

Benefits of technology

It efficiently catalyzes the production of nitric acid at room temperature, avoids the dissolution of metal ions, reduces energy consumption, improves the selectivity and yield of nitric acid, and has long-term stability and environmental friendliness.

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Abstract

The invention discloses a conjugated polymer photocatalyst, a preparation method thereof and application of the conjugated polymer photocatalyst in photocatalytic synthesis of nitric acid, and belongs to the technical field of polymer materials and photocatalysis. The preparation method of the catalyst mainly comprises the following steps: synthesizing an intermediate 2CzTPN-Br through a nucleophilic substitution reaction, then synthesizing an intermediate TBBA through an esterification reaction, and finally copolymerizing the intermediate 2CzTPN-Br and the intermediate TBBA through a coupling polymerization reaction to obtain the target catalyst. The preparation method disclosed by the invention is controllable in process, and the obtained catalyst does not need to participate in noble metal and has wide light absorption, high specific surface area and excellent carrier separation efficiency; when being applied to photocatalytic synthesis of nitric acid, nitrogen in air can be directly and efficiently converted into nitric acid under the mild conditions of room temperature, air atmosphere and water serving as a solvent, excellent durability is shown, the yield of nitric acid can reach 4466.2 mol g <-1 > cat after 324-hour continuous illumination, and wide application prospects are achieved in the field of green synthesis.
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