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. 2020 Nov 26;8:611852. doi: 10.3389/fchem.2020.611852

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Copyright © 2020 Yu, Duan and Jiang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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(a) Scanning electron microscopy (SEM) image of HPC, SEM images (b,c), and transmission electron microscopy (TEM) images (d,e) of α-Fe₂O₃/HPC with the inset in (e) exhibiting the EDS spectrum. (f) High-resolution TEM (HRTEM) image of α-Fe₂O₃ from the red-marked region in (e).