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. 2023 Feb 24;13(5):848. doi: 10.3390/nano13050848

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© 2023 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 (https://creativecommons.org/licenses/by/4.0/).

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(a) Schematic illustrations for preparation of PVA/OMMT/Ag NC films. Adapted from [191], with permission from Elsevier (Copyright 2014). Adsorption of (b) Cu²⁺ and (c) Zn²⁺ onto the MMT-Na, MMT-CP-SR (0.7CEC), and MMT-CP-SR (1CEC). Adapted from [214], with permission from Elsevier (Copyright 2020, Elsevier).