Jia Xinyu, Zhang Jinhui, Huang Qinglin, Xiong Chunyu, Ji Haixia, Ren Qifang, Jin Zhen, Chen Shaohua, Guo Wanmi, Chen Jing, Ge Yao, Ding Yi
Anhui Advanced Building Materials Engineering Laboratory, Anhui Jianzhu University, Hefei, 230601, Anhui, China; Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse, Anhui Jianzhu University, China; Key Laboratory of Huizhou Architecture in Anhui Province, Anhui Jianzhu University, Hefei, 230022, Anhui, China.
Anhui Advanced Building Materials Engineering Laboratory, Anhui Jianzhu University, Hefei, 230601, Anhui, China.
Environ Res. 2024 Jan 15;241:117639. doi: 10.1016/j.envres.2023.117639. Epub 2023 Nov 14.
In this study, CuFeO/CuS composite photocatalysts were successfully synthesized for the activation of peroxynomosulfate to remove ciprofloxacin from wastewater. The structural composition and morphology of the materials were analyzed by XRD, SEM, TEM, and Raman spectroscopy. The electrochemical properties of the samples were tested by an electrochemical workstation. The band gap of the samples was calculated by DFT and compared with the experimental values. The effects of different catalysts, oxidant PMS concentrations, and coexisting ions on the experiments were investigated. The reusability and stability of the photocatalysts were also investigated. The mechanism of the photocatalytic degradation process was proposed based on the free radical trapping experiment. The results show that the p-p heterojunction formed between the two contact surfaces of the CuFeO nanoparticle and CuS promoted the charge transfer between the interfaces and inhibited the recombination of electrons and holes. CuFeO-5/CuS photocatalyst has the best catalytic activity, and the removal rate of ciprofloxacin is 93.7%. The intermediates in the degradation process were tested by liquid chromatography-mass spectrometry (LC-MS), and the molecular structure characteristics of ciprofloxacin were analyzed by combining with DFT calculations. The possible degradation pathways of pollutants were proposed. This study reveals the great potential of the photocatalyst CuFeO/CuS in the activation of PMS for the degradation of ciprofloxacin wastewater.
在本研究中，成功合成了CuFeO/CuS复合光催化剂，用于活化过氧单硫酸盐以去除废水中的环丙沙星。通过X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和拉曼光谱对材料的结构组成和形貌进行了分析。通过电化学工作站测试了样品的电化学性能。通过密度泛函理论（DFT）计算了样品的带隙，并与实验值进行了比较。研究了不同催化剂、氧化剂过氧单硫酸盐（PMS）浓度和共存离子对实验的影响。还研究了光催化剂的可重复使用性和稳定性。基于自由基捕获实验提出了光催化降解过程的机理。结果表明，CuFeO纳米颗粒与CuS的两个接触表面之间形成的p-p异质结促进了界面间的电荷转移，抑制了电子和空穴的复合。CuFeO-5/CuS光催化剂具有最佳的催化活性，环丙沙星的去除率为93.7%。通过液相色谱-质谱联用（LC-MS）对降解过程中的中间体进行了测试，并结合DFT计算分析了环丙沙星的分子结构特征。提出了污染物可能的降解途径。本研究揭示了光催化剂CuFeO/CuS在活化PMS降解环丙沙星废水中的巨大潜力。
