Issue 45, 2021

Engineering structural defects into a covalent organic framework for enhanced photocatalytic activity

Abstract

Defect engineering is a promising methodology for modulating the electronic and band structure of semiconductive materials. A series of covalent organic frameworks, designated TAPT-COF-X (X = mole equivalents of modulator 3,5-dimethylbenzaldehyde relative to three equivalents of linker) for water-splitting have been prepared bearing a controlled proportion of structural defects. These defects significantly enhanced photocatalytic H2 production. Hydrogen evolution rates of 33 910 μmol g−1 h−1 were achieved, with the maximum H2 evolution rate for TAPT-COF-7 2.3 times that of parent TAPT-COF. Time-resolved fluorescence measurements and electrochemical impedance spectroscopy indicated that TAPT-COF-7 also possessed the highest charge separation efficiency.

Graphical abstract: Engineering structural defects into a covalent organic framework for enhanced photocatalytic activity

Supplementary files

Article information

Article type
Paper
Submitted
06 sept. 2021
Accepted
01 nov. 2021
First published
02 nov. 2021

J. Mater. Chem. A, 2021,9, 25474-25479

Engineering structural defects into a covalent organic framework for enhanced photocatalytic activity

J. Wang, X. Tian, L. Yu, D. J. Young, W. Wang, H. Li and H. Li, J. Mater. Chem. A, 2021, 9, 25474 DOI: 10.1039/D1TA07634E

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