太原理工大学学报2025，Vol.56Issue(1)：62-71,10.DOI:10.16355/j.tyut.1007-9432.20240125
氮化碳光催化降解水中双氯芬酸的机制研究
Mechanism of Photocatalytic Degradation of Diclofenac in Water by a Novel Carbon Nitride
摘要
Abstract
[Purposes]Carbon nitrides in graphite phase(g-C3N4,GCN)have been widely used in photocatalytic degradation of organic pollutants in water.However,traditional GCN is limited in practical application because of its low specific surface area and few active sites.[Methods]In this study,photocatalyst(PCN)was prepared by thermal polymerization method by using urea as precur-sor.PCN was characterized by X-ray diffraction,scanning electron microscopy,transmission electron microscopy,and Fourier transform infrared spectroscopy.Diclofenac(DCF)was selected as target pol-lutant to study photocatalytic degradation.[Findings]The results show that the specific surface area of PCN(133.963 m2/g)is significantly higher than that of GCN(2.605 m2/g),about 67 times that of GCN.PCN(0.20 g/L)can achieve 100%catalytic degradation of DCF(10 mg/L)within 10 min at pH of 5.Free radical quenching experiments confirm that superoxide radical(·O2-)and hydroxyl radical(·OH)are the primary reactive oxygen species.The degradation pathway of DCF is determined by the Fukui index-based density functional theory and the determination of intermediates.The experimental results show that PCN has high stability and has promising applications in the field of photocatalytic degradation of emerging pollutants in water.关键词
石墨相碳氮化合物/双氯芬酸/尿素/光催化/密度泛函计算Key words
carbon and nitrogen compounds in graphite phase/diclofenac/urea/photocatalysis/DFT calculation分类
资源环境引用本文复制引用
刘子昂,高艺芳,刘超,李文军,刘晓娜,李博,钱天伟..氮化碳光催化降解水中双氯芬酸的机制研究[J].太原理工大学学报,2025,56(1):62-71,10.基金项目
山西省基础研究计划(自由探索类)项目(202103021223119) （自由探索类）
太原理工大学企业委托项目(RH2300002821) （RH2300002821）
山西交通控股集团有限公司科技项目(2022-JKKJ-8) （2022-JKKJ-8）
