为提高纯氮化碳的光催化性能,增强其在处理污水中抗生素的应用,采用水热一步合成法成功合成了CN/FeS₂、CN/Fe₂O₃、Fe₂O₃/FeS₂复合材料。XRD、FT-IR分析结果表明,复合材料被成功制备。阐述了Z型异质结CN/FeS₂中CN和FeS₂之间的电子传输方式。ESR测试结果表明,超氧自由基为催化过程中的主要活性物种,其中CN/FeS₂降解四环素效率高达97%,经过6次降解循环后效率降低11%。该研究为光催化合成、设计和净化污染物开辟了新途径。

In order to improve the photocatalytic performance of pure carbon nitride and enhance its application in wastewater treatment antibiotics,CN/FeS₂,CN/Fe₂O₃,and Fe₂O₃/FeS₂ composites are successfully synthesized via hydrothermal one-step synthesis method.The results by XRD and FT-IR analysis show that the composites are successfully prepared,a Z-type heterojunction CN/FeS₂ is suggested,and the electron transport mode between CN and FeS₂ is described.ESR test show that superoxide free radicals represent the main active species in the catalytic process,and the efficiency of CN/FeS₂ in degrading tetracycline is as high as 97%.After six degradation cycles,the efficiency declines by 11%.This study opens up a new way for photocatalytic synthesis,as well as the design and purification of pollutants.

周彤(2000-),女,硕士生,研究方向为光催化,tongzhou0203@163.com;董国辉(1984-),男,博士,教授,研究方向为光催化材料活性的提高以及能量转化机理、固体废弃物资源化等,通讯联系人,dongguohui@sust.edu.cn。