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. 2017 Oct 12;7(10):317. doi: 10.3390/nano7100317

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© 2017 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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The SEM image (a) with Fe/Au elemental mapping (b,c) and TEM image with Fe/Au elemental mapping (d) of PVA/PAA/Fe₃O₄@AuNPs nanocomposites after the eighth cycle of catalytic reactions.