In this work, a dual Z-scheme Ag₃PO₄/CdS/Fe-g-C₃N₄ (AP/CdS/FeCN) photocatalyst was prepared by precipitation- deposition method. AP/CdS/FeCN photocatalyst was converted into the heterogenous photo-Fenton system with the addition of H₂O₂. The synergistic coupling between AP/CdS/FeCN and H₂O₂ resulted in enhanced for phenol degradation, with a rate constant of constant 6.2 × 10⁻⁴ s^-1, which is 1.31 and 1.61 times than that of AP/CdS/FeCN and Fe₂O₃/H₂O₂. The enhancement in photodegradation was attributed to (i) more regeneration of Fe²⁺ ions, (ii) enhanced visible light absorption, (iii) elevated redox potential due to more hydroxyl radical’s formation, and (iv) low Fe leaching in the reaction solution. As indicated by EIS, PL, and trapping experiments, photoinduced CB electrons of g-C₃N₄ and CdS were transferred entirely to Fe³⁺ to regenerate Fe²⁺ ions to accelerate the Fenton cycle. In comparison to the conventional Fe₂O₃/H₂O₂ Fenton process, Fe ion leaching in AP/CdS/FeCN/H₂O₂ catalytic system was almost negligible. It confirmed strong chemical interaction of Fe³⁺ with g-C₃N₄. AP/CdS/FeCN/H₂O₂ displayed significant catalytic efficacy and firmness for five successive catalytic cycles. Moreover, the AP/CdS/FeCN/H₂O₂ nanocomposite exhibited substantial mineralization perfomance for other phenolic pollutants. The results demonstrate that AP/CdS/FeCN/H₂O₂ catalytic system has the potential for water purification.

在这项工作中，通过沉淀-沉积法制备了Z-方案Ag ₃ PO ₄ / CdS / Fe-gC ₃ N ₄（AP / CdS / FeCN）双光催化剂。通过添加H ₂ O _2将AP / CdS / FeCN光催化剂转化为非均相光芬顿体系。AP / CdS / FeCN和H ₂ O ₂之间的协同耦合导致苯酚降解增强，速率常数恒定为6.2  ×  10 ^-4  s ^-1，是AP / CdS / FeCN的1.31倍和1.61倍和Fe ₂ O ₃ / H ₂ O ₂。光降解的增强归因于（i）Fe ²⁺离子的更多再生，（ii）可见光吸收增强，（iii）由于更多羟基自由基的形成，氧化还原电势升高，以及（iv）反应溶液中的低铁浸出。如EIS，PL和捕获实验所示，gC ₃ N ₄和CdS的光诱导CB电子完全转移到Fe ^3+上，从而再生Fe ²⁺离子，从而加速了Fenton循环。与传统的Fe ₂ O ₃ / H ₂ O ₂ Fenton工艺相比，AP / CdS / FeCN / H ₂ O _2中的Fe离子浸出催化体系几乎可以忽略不计。证实了Fe ³⁺与gC ₃ N _4的强化学相互作用。AP / CdS / FeCN / H ₂ O ₂在五个连续的催化循环中均显示出显着的催化效力和牢固性。此外，AP / CdS / FeCN / H ₂ O ₂纳米复合材料对其他酚类污染物表现出显着的矿化性能。结果表明，AP / CdS / FeCN / H ₂ O ₂催化体系具有净化水的潜力。