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. 2023 Mar 29;11:1089775. doi: 10.3389/fchem.2023.1089775

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Copyright © 2023 Chang, Wu, Lu, Du, Long, Zhu and Qin.

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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Characterizations of Pc-Fe. (A) Thermogravimetric analysis of Pc-Fe. (B) XPS spectra of Fe in Pc-Fe. (C) Size distributions of Pc-Fe in pure water at 0, 24, 48, 72, 96, and 120 h. (D) The UV-vis absorbance spectra Pc-Fe at 0, 24, 48, 72, 96, and 120 h. (E) The TMB chromogenic results of Pc-Fe. TMB is colorless and transparent; TMB + H₂O₂ is dark blue; TMB + H₂O₂+Pc-Fe is pale blue. (F) The UV-vis absorbance spectra of TMB with Pc-Fe.