Photoinduced Ce-MoS2/WO3 nanocomposites with enhanced photodynamic and enzyme-like activity for rapid sterilization

被引:11
作者
Liu, Junli [1 ]
Cheng, Wenxia [1 ]
Zhang, Kaitao [1 ]
Liu, Hui [1 ]
机构
[1] Shaanxi Univ Sci & Technol, Sch Mat Sci & Engn, Shaanxi Key Lab Green Preparat & Functionalizat In, Xian 710021, Shaanxi, Peoples R China
基金
中国国家自然科学基金;
关键词
Doping; Enzyme-like activity; Photodynamic; Antibacterial; ANTIBACTERIAL ACTIVITY; 2-DIMENSIONAL MOS2; LIGHT; FILMS; PHOTOCATALYSIS; NANOPARTICLES; GLUTATHIONE; NANOSHEETS; GRAPHENE; FACILE;
D O I
10.1016/j.ceramint.2023.02.111
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Bacterial infections is a serious threat to our health. Thus, there is an urgent need to develop a new effective antibacterial agent. In this work, we developed a novel and environmentally friendly Ce-MoS2/WO3 nanocomposite antimicrobial agent with excellent antimicrobial effect and the antimicrobial efficiency against E. coli reached to 97.8% under visible light irradiation. Electron paramagnetic resonance (EPR) spectra showed that the large amounts of superoxide anion radical (O-center dot(2)-) and hydroxyl radical ((OH)-O-center dot) were generated by the nano-composites under light excitation, which were the main active substances causing oxidative damage for bacteria. Simultaneously, the photothermal curve and peroxidase activity test of Ce-MoS2/WO3 nanocomposites confirmed it has the excellent photothermal effect and enhanced enzyme-like activity, which further assisted in antibacterial effects. Ce doping enlarges the layer spacing of MoS2 and forms lattice dislocations and distortions, effectively increasing the defect sites at the layer edges, and the coupling of Ce-MoS2 and WO3 to construct heterojunctions reduces the charge separation rate, which further improves the photocatalytic antibacterial performance and enzyme-like antibacterial activity of Ce-MoS2/WO3 nanocomposites.
引用
收藏
页码:17424 / 17436
页数:13
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