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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/).
Overview of different research areas of graphene-TiO2 composites. Reproduced with permission from [15]. Copyright Elsevier, 2011. Reproduced with permission from [75]. Copyright ACS, 2013. Reproduced with permission from [76]. Copyright ACS, 2013.