Dimer-type heterostructure of Ag/Zn0.995Ni0.005O microspheres: Microwave-assisted synthesis and synergistic antibacterial activity

作者：Tan, Linxiang; Wu, Wenjie; Yin, Qiaoqiao; Ke, Xiaoxia; Qiao, Ru^*; Tong, Guoxiu; Zhu, Lanlan

来源：Journal of Industrial and Engineering Chemistry, 2017, 52: 349-358.

DOI：10.1016/j.jiec.2017.04.011

• Zn1-xNixO
• Ag nanoparticles
• Dimer-type heterostructure
• Synergistic antibacterial activity
• Photoelectrochemical property

The dimer-type heterostructured Ag/Zn0.995Ni0.005O microspheres were prepared via two-step microwave-assisted process, which exhibited stronger visible-light-activated antibacterial performance than visible-light only, ZnO/Vis, Zn0.995Ni0.005O/Vis, or AgNPs/Vis. It is attributed to not only the interaction of released metal ions with functional groups of vital enzymes and proteins, but also the collapsing force of reactive oxygen species to the cells. Photoelectrochemical measurements show that the photogenerated charges of Ag/Zn0.995Ni0.005O possess longer lifetime and higher separation resulting from the synergistic effect between Ni and Ag, which leads to its superior visible-light-driven antibacterial performance. Gram-negative bacteria are more effectively restrained by Ag/Zn0.995Ni0.005O than Gram-positive bacteria because of structural difference between their cell walls.

• 出版日期2017-8-25
• 单位浙江师范大学