Bi Fuhong, Ba Guiming, Yu Junbo, Hu Huilin, Ye Jinhua, Wang Defa
Advanced Catalytic Materials Research Center, School of Material Science and Engineering, Tianjin University, Tianjin 300072, China.
State Key Laboratory of Precious Metal Functional Materials, Tianjin University, Tianjin 300072, China.
Nanomaterials (Basel). 2025 Jul 1;15(13):1021. doi: 10.3390/nano15131021.
Visible-light-driven photocatalytic hydrogen production is one of the ideal green technologies for solar-to-chemical energy conversion. Carbon nitride (CN, CN) has been attracting extensive attention for its suitable band structure and stability, but the efficiency of photocatalytic hydrogen evolution is low due to insufficient visible-light absorption and rapid charge recombination. Herein, we develop a novel (F, K)-co-doped CN (FKCN) catalyst via a facile thermal polymerization approach using KOH-modified melamine and NHF as the dopant precursors. The FKCN catalyst demonstrates broadened light absorption, significantly enhanced charge separation, and excellent cyclic stability. And the optimal FKCN catalyst achieves a hydrogen evolution rate of as high as 3101.5 μmol g h (12-fold that of pristine CN) under visible-light irradiation (λ ≥ 420 nm), which is among the best element-doped CN photocatalysts. This work highlights the effectiveness of a multi-element doping strategy in designing CN-based photocatalysts for efficient hydrogen evolution.
可见光驱动的光催化产氢是太阳能到化学能转换的理想绿色技术之一。氮化碳（CN，CN）因其合适的能带结构和稳定性而受到广泛关注，但由于可见光吸收不足和电荷快速复合，其光催化析氢效率较低。在此，我们通过一种简便的热聚合方法，使用KOH改性的三聚氰胺和NHF作为掺杂前驱体，开发了一种新型的（F，K）共掺杂CN（FKCN）催化剂。FKCN催化剂表现出拓宽的光吸收、显著增强的电荷分离和优异的循环稳定性。在可见光照射（λ≥420nm）下，最佳的FKCN催化剂实现了高达3101.5μmol g h的析氢速率（是原始CN的12倍），这是元素掺杂的CN光催化剂中性能最佳的之一。这项工作突出了多元素掺杂策略在设计用于高效析氢的CN基光催化剂方面的有效性。
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