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(a) and (b) X-ray diffraction patterns of Ca1, Ce1, and Ce1-AS showing the effects of the mesoporous structure between 2–10° and 20–80°; (c) Fourier-transform infrared spectroscopy (FTIR) spectra and (d) Nitrogen adsorption-desorption isotherm plots of Ca1, Ce1, and Ce1-AS nanoparticles.
