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. 2020 Aug 19;10(9):193. doi: 10.3390/membranes10090193

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© 2020 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) Surface modification of silica NPs and the PTMSP/silica MMM. Reproduced with permission from [40], published by MDPI, 2011. (b) Comparison between permeation of GO filled MMM and GOQDs filled MMM. Reproduced with permission from [43], published by Elsevier, 2018.