Benzotrifuran-based donor-acceptor covalent organic frameworks for enhanced photocatalytic hydrogen generation

Visible-light-driven hydrogen evolution from water represents a green and sustainable technology to convert solar energy into chemical energy. Covalent organic frameworks (COFs) are the most competitive platforms among the variety of photocatalysts. Herein, a novel benzotrifuran-based donor-acceptor...

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Bibliographic Details
Published in:Green chemistry : an international journal and green chemistry resource : GC 2024-03, Vol.26 (5), p.265-2612
Main Authors: Yang, Chuanmeng, Zhang, Zhenwei, Li, Jiali, Hou, Yuxin, Zhang, Qi, Li, Zhongping, Yue, Huijuan, Liu, Xiaoming
Format: Article
Language:English
Subjects:
Acceptor materials
Catalytic activity
Chemical energy
Clean technology
Energy conversion
Energy storage
Hydrogen
Hydrogen evolution
Hydrogen production
Imines
Light
Photocatalysis
Photocatalysts
Polycondensation reactions
Porosity
Solar energy
Solar energy conversion
Triazine
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Summary:Visible-light-driven hydrogen evolution from water represents a green and sustainable technology to convert solar energy into chemical energy. Covalent organic frameworks (COFs) are the most competitive platforms among the variety of photocatalysts. Herein, a novel benzotrifuran-based donor-acceptor material (COF-JLU42) was constructed using a Schiff base polycondensation reaction by introducing electron-rich benzotrifuran and deficient triazine moieties into the framework. The new COF features high crystallinity and permanent porosity with a large surface area and proves to be a photoactive semiconductor with efficient visible-light harvesting capacity. Importantly, COF-JLU42 exhibits a superior photocatalytic activity with a hydrogen evolution rate of over 40 000 μmol g −1 h −1 under visible-light illumination, which is 2.5 times higher than that of the isomorphic benzotrithiophene-based COFs under the same conditions. These findings suggest the huge application prospect of benzotrifuran-based framework materials as metal-free and solid photocatalysts in solar-energy conversion and storage. A novel benzotrifuranyl COF with excellent photovoltaic properties and low exciton binding energy was successfully constructed and used for efficient photolysis of water.
ISSN:1463-9262
1463-9270
DOI:10.1039/d3gc04972h