Surface plasmon resonance (SPR) effect of noble metal nanoparticles (NPs) for photocatalysis has a significant enhancement. In this system, a plasmonic ternary hybrid photocatalyst of Ag/AgBr/g-C3N4 was synthetized and used in water splitting to generation H2 under visible light irradiation. 18%Ag/AgBr/g-C3N4 showed the highest photoactivity, with the efficiency of hydrogen generation as high as 27-fold to that of pristine g-C3N4. Compared to simple mixture of Ag/AgBr and g-C3N4, hetero-composite Ag/AgBr/g-C3N4 showed a higher photoactivity, even though they contained same content of Ag/AgBr. We find that significant factors for enhancing properties were the synergistic effect between Ag/AgBr and g-C3N4, and the light absorption enhancing by SPR effect of Ag NPs. Ag/AgBr NPs firmly anchored on the surface of g-C3N4 and their high dispersion were also responsible for the improved activity and long-term recycling ability. The structure of Ag/AgBr/g-C3N4 hybrid materials and their enhancement to photocatalytic activity were discussed. Meanwhile, the possible reaction mechanism of this system was proposed.

中文翻译：

---

基于聚合物g-C3N4的等离子三元杂化光催化剂，用于产生可见光氢。

贵金属纳米颗粒（NPs）的表面等离振子共振（SPR）效应对光催化具有显着增强。在该系统中，合成了Ag / AgBr / g-C3N4的等离激元三元杂化光催化剂，并在可见光照射下用于水分解生成H2。18％Ag / AgBr / g-C3N4表现出最高的光活性，氢生成效率是原始g-C3N4的27倍。与Ag / AgBr和g-C3N4的简单混合物相比，杂合Ag / AgBr / g-C3N4表现出更高的光活性，即使它们包含相同含量的Ag / AgBr。我们发现，增强性能的重要因素是Ag / AgBr和g-C3N4之间的协同效应，以及Ag NPs的SPR效应增强了光吸收。牢固地锚定在g-C3N4表面的Ag / AgBr NP及其高分散性也有助于提高活性和长期回收能力。讨论了Ag / AgBr / g-C3N4杂化材料的结构及其对光催化活性的增强作用。同时，提出了该系统可能的反应机理。