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. 2017 Jul 19;7:5928. doi: 10.1038/s41598-017-06139-6

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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(a and d) TEM images of the 1 mM and 3 mM CeO₂-Graphene nanostructures shows the presence of CeO₂ NPs onto the graphene matrix, (b and e) HR-TEM image showing the uniform distribution and lattice fringes of CeO₂ NPs onto the graphene matrix, inset showing the SAED crystal ring pattern (c and f), showing elemental mapping of Ce (yellow color), O (orange color), and C from graphene in (red color).