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. 2017 Jul 9;9(7):273. doi: 10.3390/polym9070273

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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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(a) Scanning electron microscope (SEM) image of as-synthesized samples. (b,c) SEM images of samples after loading Cr(III). (d) Energy dispersive spectrometer (EDS) spectra of the samples after loading Cr(III).

(a) Scanning electron microscope (SEM) image of as-synthesized samples. (b,c) SEM images of samples after loading Cr(III). (d) Energy dispersive spectrometer (EDS) spectra of the samples after loading Cr(III).