Fabrication of SERS Substrates Based on Ce-UIO-66 and Ag@Au for Enhanced Raman Detection

Disperse the final Ce-UIO-66 powder in an ethanol solution prepared at a concentration of 1 mg/mL. Mix the dispersed solution with the prepared Ag@Au at different volume ratios. Then, vigorously mix at high speed on a vortex mixer for 5 minutes and incubate at room temperature for 1.5 hours. Finally, the SERS substrate for Raman detection is prepared by repeated washing with deionized water and drying in a vacuum oven. The schematic diagram of the synthesis process is shown in Figure 1. Different volume ratios of the composite materials are used as Raman substrates for CV testing, and the effect obtained by enhancing the CV Raman spectral values is used to determine the final volume ratio between Au@Ag and Ce-UIO-66.