Polymeric carbon nitride (g-C₃N₄) exhibits only mediocre catalytic activity in photocatalytic environmental remediation and energy conversion because of its limited light absorption and sluggish charge transfer. Herein, we assembled novel, tubular carbon nitride (D-TCN₄₅₀) with nitrogen defects/boron dopants via a self-supramolecular reaction and NaBH₄ thermal reduction approach. Advanced characterization results suggested that introducing the nitrogen defects/boron dopants can effectively promote light trapping, charge separation, and valance-band downshift. Density functional theory and electron spin resonance results further proved that the fusion of cyano groups (nitrogen defects) into the framework of D-TCN₄₅₀ can facilitate oxygen adsorption to form superoxide radicals. As a result, D-TCN₄₅₀ exhibited dramatically improved photocatalytic hydrogen evolution and photodegradation of tetracycline hydrochloride at a 4- and 9-fold enhancement compared to pristine g-C₃N₄, respectively. This integrated engineering strategy might provide a unique paradigm for the rational design of novel photocatalysts for sustainable remediation and energy innovation.

聚合氮化碳（gC ₃ N ₄）由于其有限的光吸收和缓慢的电荷转移而在光催化环境修复和能量转换中表现出中等的催化活性。在此，我们通过自超分子反应和 NaBH ₄热还原方法组装了具有氮缺陷/硼掺杂剂的新型管状氮化碳 (D-TCN ₄₅₀ ) 。先进的表征结果表明，引入氮缺陷/硼掺杂剂可以有效地促进光捕获、电荷分离和价带降移。密度泛函理论和电子自旋共振结果进一步证明氰基（氮缺陷）融合到D-TCN ₄₅₀的框架中可以促进氧吸附形成超氧自由基。因此，与原始 gC ₃ N ₄相比，D-TCN ₄₅₀表现出显着改善的四环素盐酸盐的光催化析氢和光降解，分别提高了 4 倍和 9 倍。这种综合工程策略可能为合理设计用于可持续修复和能源创新的新型光催化剂提供独特的范例。