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. 2019 Feb 12;9(2):250. doi: 10.3390/nano9020250

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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The crystallinity and surface chemistry of the nanocomposite NFs: (a) the XRD spectra for polyethersulfone (PES) NFs, TiO₂ NPs (collected after the pyrolysis), and TiO₂/PES NFs imply the emergence of the anatase characteristic peaks upon thermal treatment. (b) The ATR-FTIR spectra of TiO₂/PES NFs in two different filling factors and as non- and UV-irradiated. (c) Water contact angle measurement results for TiO₂/PES NFs in two different filling factors and as non- and UV-irradiated (the arrows mark the main characteristic peaks of PES). (d) Camera images compare the water contact angle on two samples of non- and UV-irradiated. Immediate absorption of water is evident for the UV-irradiated sample.