In this work, a new ternary Ag/AgI/Ag₃BiO₃ photocatalyst was fabricated by an in-situ precipitation method, where Ag⁰ nanoparticles, serving as a mediator, implanted on the surface of glossy AgI, quantum efficiency being improved attributed to the surface plasmon resonance (SPR) effect. The composites showed superior photocatalytic performance to methylene blue (MB) degradation under visible illumination (λ > 420 nm). The K_obs values of Ag/AgI/Ag₃BiO₃-3 were 7.4 and 3.6 times compared with that of pristine Ag₃BiO₃ and AgI, respectively. Based on the series of experimental results, a Z-scheme heterojunction has formed in preparations. The electron-hole pairs maintained a transferable cycle, which efficiently inhibited the recombination of electron-hole pairs. According to active species analysis, holes were determined the predominant work-function in photocatalytic degradation system. The feasible mechanism has proposed to illustrate the photocatalytic decomposition of MB on Ag/AgI/Ag₃BiO₃. Our work has important implication for the management and practical application of catalysts.

在这项工作中，通过原位沉淀法制备了新型三元Ag / AgI / Ag ₃ BiO ₃三元光催化剂，其中Ag ⁰纳米粒子作为介体注入了光滑的AgI表面，量子效率得到了提高。表面等离子体共振（SPR）效应。该复合材料在可见光（λ> 420 nm）下表现出优异的光催化性能，可降解亚甲基蓝（MB）。Ag / AgI / Ag ₃ BiO ₃ -3的K _obs值是原始Ag ₃ BiO _3的Kobs值的7.4和3.6倍和AgI。根据一系列实验结果，在制备物中形成了Z型异质结。电子-空穴对保持可转移的周期，这有效地抑制了电子-空穴对的重组。根据活性物种分析，确定了孔在光催化降解系统中的主要功函数。提出了可行的机理来说明MB在Ag / AgI / Ag ₃ BiO ₃上的光催化分解。我们的工作对催化剂的管理和实际应用具有重要意义。