Fig. 2.

ROS scavenging activity of AFGd-LDH. (a) ROS scavenging mechanism of AFGd-LDH. (b) EPR spectra for DMPO-OH adducts formed in the presence of ATO, ATO/LDH (without Gd), and AFGd-LDH, respectively (all samples tested at the same ATO concentration of 100 μg/mL). •OH radicals were produced via the Fenton reaction using a Fe²⁺/H₂O₂ method and discovered with DMPO. (c) ROS scavenging efficiency determined from ESR results in (b). (d) EPR spectra for DMPO-OH adducts formed in the presence of Gd-LDH, ATO and AFGd-LDH, respectively. (e) ROS scavenging efficiency determined from ESR results in (d). (f) EPR spectra for DMPO-OH adducts formed in the presence of edaravone (PMP), CeO₂ and AFGd-LDH, respectively (all samples tested at the same concentration 500 μg/mL). (g) ROS scavenging efficiency determined from ESR results in (f). (Error bar, n = 3).