Fig. 2
The properties of MnO2 and MnO2@GA-Fe@CAI in vitro. A UV–vis absorption spectra change of MnO2. B GSH consumption with different concentrations of MnO2@GA-Fe@CAI. C UV–vis absorption spectra of MnO2@GA-Fe@CAI and photographs (inset) of MB solution after different treatments. (Inset: from left to right, MB, MB + H2O2, MB + H2O2 + MnO2@GA-Fe@CAI + GSH (concentrations of 0, 0.5, 1 and 10 mM, respectively)). D The absorbance of ·OH generation is based on the catalytic oxidation of MnO2@GA-Fe@CAI with TMB at 450 nm