Elsevier

Chinese Chemical Letters

Volume 32, Issue 10, October 2021, Pages 3143-3148
Chinese Chemical Letters

Communication
Nanofibrils in 3D aligned channel arrays with synergistic effect of Ag/NPs for rapid and highly efficient electric field disinfection

https://doi.org/10.1016/j.cclet.2021.02.044Get rights and content

Abstract

The disinfection of waterborne pathogens from drinking water is extremely important for human health. Although countless efforts have been devoted for drinking water inactivation, challenges still exist in terms of relative high energy consumption and complicated to implement and maintain. Here, silver nanoparticles anchoring wood carbon (Ag NPs/WC) membrane is developed as cost-effective, high flux, scalable filter for highly efficient electric field disinfection of water. Under electric field of 4 V voltage, the designed membrane achieved more than 5 log (99.999%) disinfection performance for different model bacteria, including Escherichia coli (E. coli), Enterococcus faecalis (E. faecalis), Salmonella enterica serovar Typhimirium (S. Typhimurium) and Bacillus subtilis (B. subtilis) with a high flux of 3.8 × 103 L m−2 h−1, extremely low energy consumption of 2 J L−1 m−2 and fantastic durability (7 days). The high disinfection performance of Ag NPs/WC membrane is attributed to the synergistic disinfection of carbon nanofibrils, Ag nanoparticles as well as the low tortuous structure of the channels in wood carbon. The Ag NPs/WC membrane presents a promising strategy for point-of-use drinking water electric field disinfection treatment.

Graphical abstract

Silver nanoparticles anchoring wood carbon (Ag NPs/WC) membrane is developed as cost-effective, high flux, scalable filter for highly efficient electric field disinfection of water. Under electric field of 4 V voltage, the designed membrane achieved more than 5 log (99.999%) disinfection performance for different model bacteria.

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Declaration of competing interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Acknowledgments

The work was supported by the National Natural Science Foundation of China (No. 21876072); the Talent Innovation and Entrepreneurship Project of Lanzhou (No. 2018-RC-04); Special Fund Project for the Central Government to Guide Local Science and Technology Development (2020) and the 111 Project (No. B20027). We would like to thank Dr. Jiayu Wan for the English improvement, Dr. Mingwei Zhu for the SEM test, Dr. Zonglei Zhang for the ICP-MS measurement. We thank the Electron Microscopy Centre of

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    Z. Yang and H. Ni contributed equally to this work.

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