Conjugated polymers are promising light harvesters for water reduction/oxidation due to their simple synthesis and adjustable bandgap. Herein, both cyanamide and triazole functional groups are first incorporated into a heptazine‐based carbon nitride (CN) polymer, resulting in a mesoporous conjugated cyanamide‐triazole‐heptazine polymer (CTHP) with different compositions by increasing the quantity of cyanamide/triazole units in the CN backbone. Varying the compositions of CTHP modulates its electronic structures, mesoporous morphologies, and redox energies, resulting in a significantly improved photocatalytic performance for both H₂ and O₂ evolution under visible light irradiation. A remarkable H₂ evolution rate of 12723 µmol h⁻¹ g⁻¹ is observed, resulting in a high apparent quantum yield of 11.97% at 400 nm. In parallel, the optimized photocatalyst also exhibits an O₂ evolution rate of 221 µmol h⁻¹ g⁻¹, 9.6 times higher than the CN counterpart, with the value being the highest among the reported CN‐based bifunctional photocatalysts. This work provides an efficient molecular engineering approach for the rational design of functional polymeric photocatalysts.

中文翻译：

---

用于高效水分解的介孔聚合物氰胺-三唑-庚嗪光催化剂。

共轭聚合物由于其简单的合成方法和可调节的带隙，因此有望用于水的还原/氧化。在这里，首先将氰酰胺和三唑官能团都掺入庚嗪基氮化碳（CN）聚合物中，通过增加氰胺/三唑单元的数量，形成具有不同组成的介孔共轭氰酰胺-三唑-庚嗪聚合物（CTHP）。 CN主干。通过改变CTHP的成分，可以调节其电子结构，中孔形态和氧化还原能，从而显着改善了可见光照射下H ₂和O ₂析出的光催化性能。H ₂的惊人析出速率为12723 µmol h ^-1 g观察到^-1，导致在400nm下的高表观量子产率为11.97％。同时，优化的光催化剂还表现出O ₂析出速率为221 µmol h ^-1  g ^-1，比CN对应物高9.6倍，在报道的基于CN的双功能光催化剂中，其值最高。这项工作为功能性聚合物光催化剂的合理设计提供了一种有效的分子工程方法。