Preparation method of Ag quantum dot modified high-entropy oxide photocatalyst

.The invention discloses a preparation method of an Ag quantum dot modified high-entropy oxide Ag-(CoMgNiZnCu)O photocatalyst, which is based on the preparation method of depositing Ag quantum dots on the surfaces of (CoMgNiZnCu)O high-entropy nanoparticles, Ag-(CoMgNiZnCu)O heterojunctions are prepared by using an in-situ photoreduction method, the (CoMgNiZnCu)O high-entropy nanoparticles have relatively low hole mobility, so that the electron-hole recombination probability is obviously increased. As Ag quantum dots are deposited on the surface of the material, the specific surface area can be increased, separating of electron hole pairs is facilitated, the degradation efficiency of an organic pollutant rhodamine B is effectively improved, and the degradation rate can reach 98.6%. According to the invention, efficient conversion among visible light, electricity and chemical catalysis is realized, the method has a wide application prospect in the field of organic wastewater treatment, and the method is simple