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.
Original language | English |
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Pages (from-to) | 25474-25479 |
Number of pages | 6 |
Journal | Journal of Materials Chemistry A |
Volume | 9 |
Issue number | 45 |
DOIs | |
Publication status | Published - 7 Dec 2021 |