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. 2022 Nov 5;12:18746. doi: 10.1038/s41598-022-23465-6

Figure 2.

Figure 2

Characteristics (A) UV–Vis spectra and (B) infrared spectra of nano-CeO2(+) and nano-CeO2(−). On (A) also the UV–Vis spectrum of nano-CeO2(−) mother solution is shown.