Journal
CHEMSUSCHEM
Volume 12, Issue 19, Pages 4493-4499Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201901997
Keywords
CO2 reduction; triazine framework; donor-acceptor dyads; porous organic polymers; visible light
Funding
- National Natural Science Foundation of China [21603228, 21673241, 21471151]
- Natural Science Foundation of Fujian Province [2019J01128, 2017J05035]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB20000000]
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Photocatalytic conversion of CO2 into value-added chemical fuels is a promising approach to address the depletion of fossil energy and environment-related concerns. Tailor-making the electronic properties and band structures of photocatalysts is pivotal to improve their efficiency and selectivity in photocatalytic CO2 reduction. Herein, a covalent triazine-based framework was developed containing electron-donor triphenylamine and electron-acceptor triazine components (DA-CTF). The engineered pi-conjugated electron donor-acceptor dyads in DA-CTF not only optimized the optical bandgap but also contributed to visible-light harvesting and migration of photoexcited charge carriers. The activity of photocatalytic CO2 reduction under visible light was significantly improved compared with that of traditional g-C3N4 and reported covalent triazine-based frameworks. This study provides molecular-level insights into the mechanism of photocatalytic CO2 reduction.
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