The X-ray diffraction (XRD) spectra of two doped photocatalysts are presented in the figure below, revealing nearly identical patterns that affirm the accuracy of the synthesis procedure employed. The prominent peaks observed at 2θ = 24.5° and 47° are characteristic of the anatase phase of titanium dioxide, a crucial component for photocatalytic activity. Additionally, a subtle rise in intensity around 29° suggests the presence of the cerium oxide (111) phase, indicating successful incorporation of cerium into the photocatalyst matrix.