Issue 8, 2023

A covalent organic framework constructed from a donor–acceptor–donor motif monomer for photocatalytic hydrogen evolution from water

Abstract

Covalent organic frameworks (COFs), featuring semiconductor-like behavior, have recently garnered widespread interest for applications in photocatalysis by virtue of their well-defined and tailorable porous structures, high surface areas and excellent chemical stability. A facile strategy for designing COFs exerting efficient charge transfer and separation as well as suppressing charge carrier recombination is the precise integration of electron-donating and electron-withdrawing moieties to form long-range ordered donor–acceptor (D–A) type structures. In this work, we rationally designed and synthesized a novel imine-linked COF (DABT-Py-COF) by the condensation of a newly designed D–A–D type monomer of 4,4′,4′′,4′′′-(benzo[c][1,2,5]thiadiazole-4,7-diylbis(9,9-dimethyl-9,10-dihydroacridine-10,2,7-triyl))tetrabenzaldehyde and 1,3,6,8-tetrakis(4-aminophenyl)pyrene under solvothermal conditions. Remarkably, the obtained DABT-Py-COF exhibited outstanding and steady hydrogen production with a maximum hydrogen evolution rate (HER) of 5458 μmol g−1 h−1 under visible-light irradiation (AM 1.5). This work has paved the way for the rational design and preparation of more efficient D–A type COFs for photocatalysis.

Graphical abstract: A covalent organic framework constructed from a donor–acceptor–donor motif monomer for photocatalytic hydrogen evolution from water

Supplementary files

Article information

Article type
Paper
Submitted
10 Dec 2022
Accepted
06 Jan 2023
First published
06 Jan 2023

J. Mater. Chem. A, 2023,11, 4007-4012

A covalent organic framework constructed from a donor–acceptor–donor motif monomer for photocatalytic hydrogen evolution from water

G. Wang, H. Xu, K. Xie, J. Kan, J. Fan, Y. Wang, Y. Geng and Y. Dong, J. Mater. Chem. A, 2023, 11, 4007 DOI: 10.1039/D2TA09625K

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