In recent times, the nanostructured materials of foreign metal ion doped ZnO photocatalysts acts as a hotspot in the research area of photocatalysis because of its non-toxic, cost-effective and environmental friendly behaviour. Sr-doped ZnO microspheres were synthesized by the hydrothermal method. In foreign metal ion-doped ZnO photocatalysts, Sr ions are uniformly distributed into ZnO lattice, which reflects the enhancement in the light absorption behaviour. Especially, 5% Sr-doped ZnO shifts the bandgap to visible region up to 422 nm. Sunlight-driven photocatalytic activity revealed that Sr (5%)-doped ZnO shows maximum degradation efficiency of 99%, 90%, and 93% on methylene blue, Rhodamine B, and ciprofloxacin, respectively. Further, the possible degradation mechanism was well-discussed with the help of the elemental trapping test.

近年来，掺杂外来金属离子的ZnO光催化剂纳米结构材料因其无毒、经济、环保等优点成为光催化研究领域的热点。采用水热法合成了掺杂Sr的ZnO微球。在掺杂外来金属离子的 ZnO 光催化剂中，Sr 离子均匀分布在 ZnO 晶格中，这反映了光吸收行为的增强。特别是，5% Sr 掺杂的 ZnO 将带隙移动到可见光区，最高可达 422 nm。阳光驱动的光催化活性表明，掺杂 Sr (5%) 的 ZnO 对亚甲蓝、罗丹明 B 和环丙沙星的最大降解效率分别为 99%、90% 和 93%。此外，在元素捕获试验的帮助下，对可能的降解机制进行了充分讨论。