Characterization of Ag@Au/Ce-UIO-66 Nanocomposite Material Using XRD and EDS

In order to determine the phase composition of the material, X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDS) characterization were performed on the relevant materials in this experiment. The XRD spectrum of Ce-UIO-66 is shown in Figure 2d. The main diffraction peaks at low angles of the synthesized metal-organic framework material Ce-UIO-66 are consistent with the published literature [40], confirming the structural integrity of MIL-101(Fe). The diffraction peaks at 38.12°, 44.38°, 64.54°, and 77.48° observed in the green line in Figure 3d correspond to the five crystal planes (111), (200), (220), (311), and (222) of Ag@Au [41], indicating a high crystallinity of Ag@Au in the Ce-UIO-66 structure. By comparing the blue and green lines in Figure 3d, we can also observe that the diffraction peaks of Ce-UIO-66 do not show significant changes before and after combining with Ag@Au, indicating that the crystal structure of Ce-UIO-66 is well preserved in the Ag@Au/Ce-UIO-66 nanocomposite. The energy-dispersive X-ray spectrum of the Ag@Au/Ce-UIO-66 nanocomposite (Figure 3e) confirms the presence of Au, Ag, and Ce elements in the composite material, and the element mappings and overlapping images in Figure 2f further demonstrate the distribution of silver-coated gold nanoparticles on Ce-UIO-66.