A Pd-Ag bimetallic modified TiO2(B) nanosheet composite material, its preparation method, and its application in the carbon dioxide hydrogenation reaction.

Abstract

This invention belongs to the field of nanocatalytic materials and carbon dioxide resource utilization technology, and relates to a Pd-Ag bimetallic modified TiO2(B) nanosheet composite material, its preparation method, and its application in the hydrogenation reaction of carbon dioxide. The preparation method includes the following steps: mixing ethylene glycol, a titanium source, and water to obtain a titanium precursor liquid; heating the precursor liquid to perform a solvothermal reaction to obtain TiO2(B) nanosheets; dispersing the obtained TiO2(B) nanosheets in a mixed solvent, adding palladium and silver precursors, and performing photoloading under inert gas protection to obtain the Pd-Ag bimetallic modified TiO2(B) nanosheet composite material. The material obtained by this invention exhibits good activity, selectivity, and stability in the CO2 hydrogenation to formic acid and / or formate reaction. The method of this invention uses readily available raw materials, has a simple process, easily controllable conditions, and good reproducibility, showing promising application prospects.

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