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. 2020 May 18;10(5):968. doi: 10.3390/nano10050968

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© 2020 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) Fourier transform infrared (FTIR) spectra of: (a) commercial hematite, (b) Fe₂O₃-CMS, (c) CMS, (B) Raman spectra of: (a) commercial hematite, (b) α-Fe₂O₃-CMS, (c) CMS.