Abstract In this work, a ternary BiOCl/carbon quantum dots (CQDs)/reduced graphene oxide (rGO) composite photocatalyst with high removal efficiency of ciprofloxacin was fabricated. For BiOCl/CQDs/rGO-10, rGO greatly enhanced the adsorption capacity, while rGO and CQDs significantly improved the photocatalytic performance by enhancing the charge separation and charge injection, which were 3.8 and 8.4 times higher than those of BiOCl, respectively. Interestingly, the photon absorption rate of BiOCl/CQDs/rGO-10 was only 1.3 times higher than that of BiOCl, suggesting that CQDs and rGO could not improve the effective light absorption although they could enhance the light harvesting ability and demonstrating the enhancement in light harvesting ability was not an essential factor for improving photocatalytic activity. In addition, BiOCl/CQDs/rGO-10 displayed high stability and the photocatalytic mechanism of ciprofloxacin was also proposed. This work not only exhibited an excellent reference with outstanding adsorption-photocatalytic performance in application of water remediation, but also provided a new insight into the roles of CQDs and rGO in the adsorption and photocatalysis for CQDs or rGO based composite photocatalysts.

中文翻译：

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三元BiOCl/CQDs/rGO光催化剂的制备：CQDs和rGO在吸附-光催化去除环丙沙星中的作用

摘要 在这项工作中，制备了具有高环丙沙星去除效率的三元 BiOCl/碳量子点（CQDs）/还原氧化石墨烯（rGO）复合光催化剂。对于 BiOCl/CQDs/rGO-10，rGO 大大增强了吸附能力，而 rGO 和 CQDs 通过增强电荷分离和电荷注入显着提高了光催化性能，分别比 BiOCl 高 3.8 倍和 8.4 倍。有趣的是，BiOCl/CQDs/rGO-10 的光子吸收率仅比 BiOCl 高 1.3 倍，这表明 CQDs 和 rGO 虽然可以增强光收集能力并证明了光的增强，但并不能提高有效光吸收收获能力不是提高光催化活性的重要因素。此外，BiOCl/CQDs/rGO-10 表现出高稳定性，还提出了环丙沙星的光催化机理。这项工作不仅在水修复应用中表现出优异的吸附-光催化性能，而且为了解 CQDs 和 rGO 在 CQDs 或 rGO 基复合光催化剂的吸附和光催化中的作用提供了新的见解。