Enhanced activation of peroxymonosulfate by a floating Cu0-MoS2/C3N4 photocatalyst under visible-light assistance for tetracyclines degradation and Escherichia coli inactivation

被引：0
作者：
Liu, Yiyang [1 ]
Wang, Xuejiang [1 ]
Sun, Qiunan [1 ]
Chen, Liuyu [1 ]
Yuan, Meng [1 ]
Sun, Zhenhua [1 ]
Zhang, Yanan [2 ]
Xia, Siqing [1 ]
Zhao, Jianfu [1 ]
机构：
[1] Tongji Univ, Shanghai Inst Pollut Control & Ecol Secur, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resource Reuse, Shanghai 200092, Peoples R China
[2] Tongji Univ, Coll Chem Sci & Engn, Shanghai 200092, Peoples R China
来源：
CHEMICAL ENGINEERING JOURNAL | 2023年 / 457卷
关键词：
Escherichia coli; Peroxymonosulfate; Photocatalysis; Copper; Singlet oxygen; Tetracycline; ADVANCED OXIDATION; AQUEOUS-SOLUTION; CARBON NITRIDE; ADSORPTION; GENERATION; REMOVAL; PERSULFATE; COMPOSITE; CATALYSIS; ELECTRON;
D O I：
10.1016/j.cej.2022.141220
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Transition metal-based photocatalysts have recently attracted much attention in photo-induced Peroxymonosulfate (PMS) activation systems. Herein, a novel floating catalyst Cu0-MoS2/C3N4-expanded graphite (CuMSCN-EG) was prepared by a chemical reduction method and applied as a PMS activator to remove tetracyclines (TCs) and inactivate Escherichia coli under visible light irradiation in aqueous solution. Over 99.0 % of TCs and Escherichia coli could be removed and inactivated within 1 h in Vis/PMS/Cu-MSCN-EG system. Compared to the MoS2/C3N4-EG system, the loading of zero-valent copper in the Vis/PMS/Cu-MSCN-EG system increased the reaction rate by 278 %. Raman spectroscopy and density functional theory (DFT) calculations indicated that .OH and 1O2 were generated via two different adsorption patterns between PMS and copper (equivalent to Cu+-OSO3- -OH and equivalent to Cu+-OH-OSO3- ). With the light assistance, the photo-induced electrons reduced the copper leaching and enhanced the generation of .SO4- and .O2-, leading to a high recyclability and mineralization rate. Overall, this study provides a new insight into the fabrication of copper-based PMS activator with high efficiency and durability for contaminants degradation and pathogen inactivation.
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页数：14
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