Fig. 2.

ROS-scavenging ability exploration of PMPB NC. (a) Time-dependent Sim release profile from Sim@PMPB NC. (b) UV–vis spectra of DPPH when incubating with PMPB NC with varied concentrations (500, 250, 125, 62.5, 31.25 and 0 μg/mL). (c) Dose-dependent elimination of DPPH by PMPB NC. (d) ESR spectra of different samples including the FeSO₄ & H₂O₂ mixture and PMPB NC with varied concentrations (0, 50, 25, 12.5 μg/mL) dispersed in the mixture of FeSO₄ and H₂O₂, where DMPO always existed in each group. (e) ESR spectra of different samples including PMPB NC with varied concentrations (0, 50, 100, 200 μg/mL) dispersed in the TiO₂ dispersion in the presence of xenon light irradiation (300 W), where TEMP always existed in each group. (f) Dose-dependent elimination of H₂O₂ by PMPB NC