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(a) Digital photos for the generation of gas bubbles after the incubation of SFO nanozyme with H2O2 at different pH values. (b) O2 concentration of H2O2 and SFO nanozyme with H2O2 at different pH values. (c) H2O2 degradation of H2O2 and SFO nanozyme with H2O2 at different pH values. (d–e) UV–vis spectra of H2O2–Ti(SO4)2 solutions at different times with and without the addition of SFO nanozyme.
