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. 2019 Feb 28;12(5):709. doi: 10.3390/ma12050709

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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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(a) Fourier-transform infrared spectroscopy (FTIR) spectra (b) X-ray photoelectron spectroscopy (XPS) spectra of pure PS and PS/CNT membrane, the inset shows the lower intense peaks related to oxygen (O1s).