Inactivation of E. coli by nano-Cu/MWCNTs combined with hydrogen peroxide.
This paper aims at the study on the antibacterial activity of nCu-MWCNTs combined with H2O2against gram-negative bacteria Escherichia coli (E. coli). The antibacterial ability of nCu-MWCNTs/H2O2was evaluated by traditional surface plating method, fluorescence and SEM imaging, and the effects of variables (contacting time, dose of nCu-MWCNTs and dose of H2O2) were investigated. By comparing with other five processes including H2O2, MWCNTs, nCu-MWCNTs, MWCNTs/H2O2and nCu/H2O2, nCu-MWCNTs and H2O2was proved to have superlative antimicrobial effectiveness against E. coli. The role of nano-Cu, MWCNTs and H2O2in the antimicrobial activity of nCu-MWCNTs/H2O2was clarified. The release of copper ions and formation of hydroxyl radicals (OH) both contributed the antibacterial ability of nCu-MWCNTs/H2O2system. And MWCNTs as the support might be able to promote the electron transfer in nCu-MWCNTs for copper ion release.
State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, People's Republic of China. Electronic address: 14huangtiandi@tongji.edu.cn.
Tiandi
T
Huang
State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, People's Republic of China. Electronic address: minghaosui@tongji.edu.cn.
Minghao
M
Sui
State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, People's Republic of China. Electronic address: shelrealyjr@126.com.
Jiayi
J
Li
D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D003300:Copper / Q000494:pharmacology*; D004926:Escherichia coli / Q000187:drug effects*; D006861:Hydrogen Peroxide / Q000494:pharmacology*; D017665:Hydroxyl Radical; D053758:Nanoparticles
D000900:Anti-Bacterial Agents; D017665:Hydroxyl Radical; D003300:Copper; D006861:Hydrogen Peroxide
Antibacterial activity; E. coli; Hydrogen peroxide; nCu-MWCNTs