Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 15, Issue 30, Pages 36404-36411Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.3c07699
Keywords
polymer photocatalyst; donor-& pi;-acceptor-acceptordesign; acceptor content; narrow band gap; hydrogen production
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Conjugated microporous polymer (CMP) photocatalysts with D-p-A-A structure, especially with optimized content of BTDO acceptor, exhibit enhanced photocatalytic activity for solar-driven hydrogen generation due to their electronic structure, reaction sites availability, and the separation of photoexcited charges.
Conjugated microporous polymer (CMP) photocatalysts with donor-p-acceptor (D-p-A) or donor-acceptor (D-A) structures have garnered great attention for solar-driven hydrogen generation because of their inherent charge separation nature and high surface area. Herein, we design a series of D-p-A-A-type CMP photocatalysts to uncover the influence of the content of the dibenzo[b,d]thiophene-S-S-dioxide (BTDO) acceptor on the photocatalytic activity. The results demonstrate that the acceptor content in the D-p-A-A-type CMP photocatalysts affects the electronic structure, the availability of reaction sites, and the separation between light-generated electrons and holes, which mainly determine the photocatalytic performance for H-2 release. Benefiting from the synergy of light absorption, hydrophilicity, and active sites, the bare polymer PyT-BTDO-2 with an optimized BTDO content exhibits a high H-2 production rate of 230.06 mmol h(-1) g(-1) under simulated sunlight, manifesting that the strategy of D-p-A-A structural design is efficacious for boosting the photocatalytic performance of CMP photocatalysts.
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