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. 2021 Jul 10;19:206. doi: 10.1186/s12951-021-00957-7

Fig. 4.

Fig. 4

a UV–vis spectra of GSH solutions containing Fe3O4@Pt NPs with DTNB as the trapping agent of sulphydryl (-SH). b Release profiles of Fe2+ ions from Fe3O4@Pt NPs with 10 mM GSH. c UV–vis absorbance of TMB by Fe2+-mediated Fenton-like reaction in the presence or absence of GSH. d The UV–vis absorbance of TMB by Fe3O4@Pt NPs mediated Fenton-like reaction in the presence or absence of GSH. e MB degradation by Pt NPs and Fe3O4@Pt NPs-mediated EDT in the presence or absence of GSH and Fe3+. f Schematic illustration for the mechanism of ROS generation by Fe3O4@Pt NPs