Conjugated porous polymers based on 1,3,5-triazine and dibenzo[b,d]thiophene sulfone (DBTSO) units show excellent solar water splitting ability. A high hydrogen evolution rate of 16 287 μmol g−1 h−1 is achieved.
Donor–acceptor (D–A)-type
photocatalysts containing
the polycyclic aromatic donor (BTT-CPP) and nonpolycyclic
aromatic donor (TTB-CPP) are designed and synthesized.
Their physicochemical properties are thoroughly investigated. The
photocatalytic hydrogen generation experiments show that both polymers
exhibit distinct photocatalytic performance. BTT-CPP displays
an attractive hydrogen evolution rate (HER) of 37,866 μmol g–1 h–1 without further addition of
the metal co-catalyst, one of the highest values reported for organic
photocatalysts. The optimal HER of TTB-CPP is 8466 μmol
g–1 h–1. These results highlight
the important role of the donor unit on the performance of D–A-type
photocatalysts and demonstrate that thiophene-contained polycyclic
aromatic unit BTT is an excellent donor unit for high HER photocatalysts.
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