Wang Jiahao, Zhang Lianyue, Zhang Haiyue, Cai Runyu, Jin Hengda, Xu Man, Cao Xuan, Yao Shuhua
Shenyang University of Chemical Technology Shenyang 110142 Liaoning China.
Instrumental Analysis Center, Shenyang University of Chemical Technology Shenyang 110142 China.
RSC Adv. 2024 Aug 5;14(34):24413-24423. doi: 10.1039/d4ra04174g.
The overuse of antibiotics in treating bacterial infections is a significant threat to the environment and human health. The utilization of visible-light-assisted peroxydisulfate (PDS) activation for eliminating organic pollutants is a promising approach. This study uses a straightforward hydrothermal method to prepare magnetically recyclable spherical CuO@FeO. The efficacy of this material in removing antibiotic pollutants was assessed using simulated wastewater containing tetracycline (TC). TC removal was achieved by activating PDS with CuO@FeO as the visible light photocatalyst. Experimental findings revealed that under specific conditions-a pH of 9, a CuO@FeO concentration of 60 mg L, and a PDS concentration of 25 mg L-the removal rate of TC reached 97.67% after 30 min of irradiation. Moreover, CuO@FeO exhibited excellent recyclability, maintaining a removal rate of 93.33% after five recycling rounds. X-ray diffraction characterization of the CuO@FeO composite before and after cycling confirmed its robust stability and reusability. X-ray photoelectron spectroscopy analysis showed that electrons migrated from FeO to CuO during the photocatalytic reaction, indicating the formation of an S-type heterojunction in CuO@FeO. Free radical trapping experiments demonstrated the active involvement of ·OH, ·O , SO˙ and h radicals in TC removal.
在治疗细菌感染过程中过度使用抗生素对环境和人类健康构成了重大威胁。利用可见光辅助过硫酸盐（PDS）活化来消除有机污染物是一种很有前景的方法。本研究采用简单的水热法制备了磁性可回收的球形CuO@FeO。使用含有四环素（TC）的模拟废水评估了该材料去除抗生素污染物的效果。通过以CuO@FeO作为可见光光催化剂活化PDS来实现TC的去除。实验结果表明，在特定条件下（pH为9、CuO@FeO浓度为60 mg/L、PDS浓度为25 mg/L），照射30分钟后TC的去除率达到97.67%。此外，CuO@FeO表现出优异的可回收性，经过五次循环后去除率仍保持在93.33%。对循环前后的CuO@FeO复合材料进行X射线衍射表征，证实了其强大的稳定性和可重复使用性。X射线光电子能谱分析表明，在光催化反应过程中电子从FeO迁移到CuO，这表明在CuO@FeO中形成了S型异质结。自由基捕获实验证明了·OH、·O、SO˙和h自由基在TC去除过程中的积极参与。
