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. 2019 May 15;10(5):326. doi: 10.3390/mi10050326

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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) Schematic view of the band energy diagram for Cu₂O-loaded TiO₂ pillared photocatalysts for conversion of CO₂ into value-added chemicals (taken with permission from [68]). (b) FESEM image for TT550 sample displaying the layered structure of MXenes loaded with TiO₂ nanoparticles, and (c) the proposed mechanism of photogenerated charge transfer within the TiO₂-Ti₃C₂ 2-D nanostructure (taken with permission from [69]).