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. 2020 May 4;10(5):885. doi: 10.3390/nano10050885

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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) Cr(VI) reduction and removal mechanism using Ti₃C₂/TiO₂ composite. (b) SEM element mapping of the Ti₃C₂/TiO₂ composites before and after chromium adsorption at two different pH levels: 2 and 5. Adapted and reproduced with permission from [56] Copyright 2020 Elsevier. SEM images of (c) Ti₃C₂T_x, (d) Ti₃C₂T_x/PmPD-2/1, (e) Ti₃C₂T_x/PmPD-5/1, and (f) Ti₃C₂T_x/PmPD-10/1, and (g) Ti₃C₂T_x/PmPD adsorption mechanism of Cr (VI). Adapted and reproduced with permission from [58]. Copyright 2019 MDPI.