期刊
CHEMOSPHERE
卷 184, 期 -, 页码 347-357出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2017.05.118
关键词
Graphene sponge; Copper nanoparticles; Bactericidal filter; Membrane damage; Oxidative stress
资金
- National Natural Science Foundation of China [51521006, 51579095, 51378190, 21675043]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT-13R17]
- Hunan province university innovation platform open fund project [14K020]
- Interdisciplinary Research Funds for Hunan University
- Scientific Research Foundation, State Education Ministry
Nanotechnology has great potential in water purification. However, the limitations such as aggregation and toxicity of nanomaterials have blocked their practical application. In this work, a novel copper nanoparticles-decorated graphene sponge (Cu-GS) was synthesized using a facile hydrothermal method. Cu-GS consisting of three-dimensional (3D) porous graphene network and well-dispersed Cu nano particles exhibited high antibacterial efficiency against Esherichia coil when used as a bactericidal filter. The morphological changes determined by scanning electron microscope and fluorescence images measured by flow cytometry confirmed the involvement of membrane damage induced by Cu-GS in their antibacterial process. The oxidative ability of Cu-GS and intercellular reactive oxygen species (ROS) were also determined to elucidate the possible antibacterial mechanism of Cu-GS. Moreover, the concentration of released copper ions from Cu-GS was far below the drinking water standard, and the copper ions also have an effect on the antibacterial activity of Cu-GS. Results suggested that Cu-GS as a novel bactericidal filter possessed a potential application of water disinfection. (C) 2017 Elsevier Ltd. All rights reserved.
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