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. 2023 Jan 19;21:21. doi: 10.1186/s12951-023-01770-0

Fig. 2.

Fig. 2

Characterization of nanoparticles. A Transmission electron microscopy (TEM), B hydrated particle size, and C zeta potential of CeO2 and D-CeO2. D FT-IR spectra. E XRD patterns. Analysis of the Ce3+/Ce4+ ratio in G CeO2 and F D-CeO2 by XPS. Superoxide anion scavenging by SOD-mimicking ability in different concentrations of D-CeO2 was analyzed using H ESR and I NBT methods. J Oxygen generation from H2O2 (120 mM) catalyzed by CAT-mimicking activity of D-CeO2