This work synthesized a ternary dual S-scheme photocatalyst ZnInS/AgPO/ZnFeO by co-modifying AgPO with ZnFeO and ZnInS by facile co-precipitation method. XRD outcome established the formation of bare AgPO ZnInS and ZnFeO and ZnInS/AgPO/ZnFeO was shown to be pure since peaks matching these semiconductors appeared. These findings were further supported by the FTIR and XPS analyses, which revealed the shift in structural characteristics. UV–Vis spectroscopy showed a broader absorption spectrum of the nanocomposite and pointed out that it might be used as a photocatalyst in direct sunshine. Shorter charge transfer resistance and poor recombination rate of charge carriers are shown by a smaller radius in the EIS Nyquist plot and a less intense PL spectrum of ternary composite, respectively. Under simulated solar radiations, the photocatalytic performance of the ZnInS/AgPO/ZnFeO (ZIS/SP/ZIS) nanocomposite (99.8 %) was the highest against RhB decolorization when compared to pure ZnInS (ZIS) (33.3 %), AgPO (SP) (19.6 %), ZnFeO (ZF) (20.1 %) and binary AgPO/ZnFeO (SP/ZF) (55.4 %) nanocomposite. However, COD proved that complete mineralization took longer and took 240 min. Experiments on scavenging have shown that the radicals O, h, and OH are created and influence RhB degradation in order: O >OH > h. ESR experiment supported the scavenging study results. Out of two main schematic models used to depict the photocatalytic reaction mechanism, the S-scheme can effectively explain boosted light absorption, charge carrier separation, the synergistic effect of the components, and improved photocatalytic performance. Facile magnetic separation and photostability were observed as photocatalysts retained 90.8 % degradation efficiency after four reuse cycles.

中文翻译：

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新型三元双 S 型 ZnFe2O4/Ag3PO4/ZnIn2S4 光催化剂的制备，增强可见光驱动的 RhB 降解

本工作通过简便的共沉淀法，将AgPO与ZnFeO和ZnInS共改性，合成了三元双S型光催化剂ZnInS/AgPO/ZnFeO。 XRD 结果表明形成了裸露的 AgPO、ZnInS 和 ZnFeO，并且 ZnInS/AgPO/ZnFeO 被证明是纯的，因为出现了与这些半导体匹配的峰。这些发现得到了 FTIR 和 XPS 分析的进一步支持，揭示了结构特征的变化。紫外-可见光谱显示纳米复合材料具有更宽的吸收光谱，并指出它可以在阳光直射下用作光催化剂。 EIS 奈奎斯特图中较小的半径和三元复合材料的较低强度的 PL 谱分别显示了较短的电荷转移电阻和较差的载流子复合率。在模拟太阳辐射下，与纯 ZnInS (ZIS) (33.3 %)、AgPO (SP) 相比，ZnInS/AgPO/ZnFeO (ZIS/SP/ZIS) 纳米复合材料 (99.8 %) 的光催化性能最高，对 RhB 脱色效果最高。 (19.6 %)、ZnFeO (ZF) (20.1 %) 和二元 AgPO/ZnFeO (SP/ZF) (55.4 %) 纳米复合材料。然而，COD证明完全矿化需要更长的时间，需要240分钟。清除实验表明，自由基 O、h 和 OH 的产生对 RhB 降解的影响顺序为：O > OH > h。 ESR 实验支持了清除研究结果。在用于描述光催化反应机理的两个主要示意模型中，S方案可以有效地解释增强的光吸收、载流子分离、组分的协同效应以及改进的光催化性能。观察到易于磁分离和光稳定性，光催化剂在四次重复使用循环后仍保持 90.8% 的降解效率。