This work proposes a novel carbon nitride-based hybrid (g-C₃N₄/Cu/THPP) with small-sized Cu as the bridging linker for improving the photocatalytic activity of graphitic carbon nitride (g-C₃N₄)/tetrakis-(4-hydroxyphenyl)porphyrin (THPP). It was found that the special Cu linker had a great influence on the microstructure and photocatalytic H₂ production of the C₃N₄/THPP nanohybrid. The photocatalytic activity was enhanced by about 17.3 times compared to that of pristine g-C₃N₄ and about 11.6 times higher than that of g-C₃N₄/THPP. Especially, it was enhanced by about 3.1 times than that of g-C₃N₄/CuTHPP (a comparative composite without the Cu bridge). Furthermore, the photocatalysis mechanism was investigated in detail. The results demonstrated that interfacial modification with the special Cu linker was key in improving the absorption, electron/hole separation and photocatalytic performance of the nanohybrid. This work provides a facile strategy for preparing highly efficient photocatalysts through interfacial modifications with special metals.

中文翻译：

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在特殊铜精细桥接的氮化碳/卟啉纳米杂化物上增强的电子转移和光催化制氢

这项工作提出了一种新型的基于氮化碳的杂化体（gC ₃ N ₄ / Cu / THPP），具有小尺寸的Cu作为桥联连接体，可提高石墨化氮化碳（gC ₃ N ₄）/四（4-）的光催化活性。羟苯基）卟啉（THPP）。结果发现，特殊的Cu连接基对C ₃ N ₄ / THPP纳米杂化体的微观结构和光催化H _2的产生有很大的影响。的光催化活性是通过大约17.3倍增强相比，原始GC的₃ Ñ ₄比GC的更高以及约11.6倍₃ Ñ ₄/ THPP。特别是，它比gC ₃ N ₄ / CuTHPP（无铜桥的对比复合材料）增强了约3.1倍。此外，详细研究了光催化机理。结果表明，使用特殊的Cu连接剂进行界面修饰是提高纳米杂化材料吸收，电子/空穴分离和光催化性能的关键。这项工作为通过特殊金属的界面改性制备高效的光催化剂提供了一种简便的策略。