Ag₂O/ZnO/rGO heterojunction photocatalysts were synthesized via a rapid microwave hydrothermal method for photocatalytic degradation of bisphenol A (BPA) under simulated solar light. Ag doping efficiently decreased the bandgap of ZnO, and loading on rGO inhibited the recombination of photoinduced electron-hole pairs. The highest BPA removal rate (80%) was achieved with an Ag doping ratio of 5% and a GO loading ratio of 3 wt%. The enhanced photocatalytic performance was attributed to the narrower bandgap and the improved separation efficiency of electron-hole pairs. Moreover, the recycling experiments proved that Ag₂O/ZnO/rGO possessed excellent photostability. Hole (h⁺) and •OH played crucial roles in the photocatalytic system. The degradation pathway of BPA including hydroxylation and the cleavage of covalent bonds was proposed. The toxicity assessment of intermediates elucidated that most of intermediates were less toxic than BPA. The as-prepared Ag₂O/ZnO/rGO exhibited outstanding photostability and pH adaptability, having great potential to be applied to the degradation of emerging organic pollutants in wastewater.

通过快速微波水热法合成了Ag ₂ O / ZnO / rGO异质结光催化剂，用于在模拟太阳光下光催化降解双酚A（BPA）。Ag掺杂有效地降低了ZnO的带隙，并且rGO上的负载抑制了光诱导的电子-空穴对的重组。Ag掺杂率为5％，GO负载率为3 wt％时，BPA去除率最高（80％）。增强的光催化性能归因于较窄的带隙和改进的电子-空穴对的分离效率。此外，回收实验证明，Ag ₂ O / ZnO / rGO具有良好的光稳定性。孔（h ⁺）和•OH在光催化体系中起关键作用。提出了双酚A的降解途径，包括羟基化和共价键的裂解。中间体的毒性评估表明，大多数中间体的毒性低于BPA。制备后的Ag ₂ O / ZnO / rGO具有优异的光稳定性和pH适应性，具有很大的潜力可用于降解废水中新兴的有机污染物。