Doped CuO-ZnO catalyst, doped CuO-ZnO ZIF-8 catalyst, and preparation method and application of doped CuO-ZnO ZIF-8 catalyst

The invention relates to the technical field of catalysts, and provides a doped CuO-ZnO catalyst, a doped CuO-ZnO-coated ZIF-8 catalyst, a preparation method and an application of the doped CuO-ZnO-coated ZIF-8 catalyst. The Co oxide is introduced into the CuO-ZnO catalyst through a hydrothermal method, the specific surface area of the catalyst can be effectively increased through metal oxide doping, the obtained metal oxide doped CuO-ZnO catalyst is high in oxygen vacancy concentration and high in catalytic activity, and the CO2 conversion rate and CH3OH selectivity can be effectively improved. ZIF-8 is further grown on the surface of the metal oxide doped CuO-ZnO catalyst through a hydrothermal method, the specific surface area and CO2 adsorption capacity of the catalyst are increased through formation of the ZIF-8, the exposure degree of active sites on the surface of the catalyst and the CO2 concentration are effectively improved, the catalytic utilization rate of CO2 is improved through the rich CO2 envi