Journal
NANO ENERGY
Volume 36, Issue -, Pages 241-249Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2017.04.030
Keywords
Triboelectric nanogenerator; Water sterilization; Electroporation; Reactive oxygen species; Electron storage
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Funding
- national key R & D project from Minister of Science and Technology, China [2016YFA0202703]
- National Natural Science Foundation of China [NSFC 31571006, NSFC 81601629]
- Beijing Talents Fund [2015000021223ZK21]
- Thousands Talents program for pioneer researcher and his innovation team
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A self-powered and high-efficient water sterilization system was set up consisting of a wave-driven triboelectric nanogenerator (TENG) and two nanobrush electrodes made of Ag-nanoparticles integrated ZnO-nanowires. The system showed both instant and sustainable sterilization efficiency for various microbes including those in natural river water. The colony forming units (CFU) were reduced from 106/mL to 0 within 0.5 min of electrical field (EF) treatment for Gram-negative bacteria. In addition, the bacteria annihilation ability was sustained for at least 20 min after withdrawing the EF. The mechanism lay in the synergetic work of electricity and the Ag/ZnO nanomaterial, which not only produced electroporation during EF treatment, but also induced sustained intracellular reactive oxygen species (ROS) to do additional sterilization when EF was withdrawn.
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