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. 2018 Jan 15;8:784. doi: 10.1038/s41598-017-18724-w

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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(a) Schematic view of the measurement of the antibacterial activity of TFN membranes; (b) Images of the E. coli colonies formed in the plate of UV-treated (i) TFC, (ii) TFN2 and (iii) TFN4 membranes; (c) Mechanism for photocatalytic activity of TiO₂ NPs under UV irradiation; (d) Number of E. coli colonies counted on the plate of TFC, TFN2 and TFN4 membranes after 30 minutes of UV irradiation.