Catalyst COF-5 for carbon dioxide photo-reduction and preparation method thereof

Abstract

The invention provides a catalyst COF-5 for carbon dioxide photo-reduction and a preparation method thereof. The preparation method includes dissolving hexahydroxytriphenylene and 1,4-benzenediboronic acid in a mass ratio of 16:25 in a mixed solution of dioxane and mesitylene in a volume ratio of 1:1 according to a solvothermal method, and stirring uniformly to obtain a precursor solution; preparing the COF-5 from the precursor solution in a reactor by means of solvothermal heating. The preparation method initiatively synthesizes the COF-5 in the reactor according to the solvothermal method and is simpler and more convenient to operate and less in energy consumption during reaction as compared with a traditional method, and the COF-5 photocatalytic material prepared by the method has excellent CO2 photo-reducing capacity in full light.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a covalent organic framework material COF-5 material, a preparation method and an application. Background technique [0002] In recent years, the greenhouse effect and energy problems have become more and more serious, and carbon dioxide is the most important greenhouse gas, which warms the global climate, which in turn causes a series of problems such as the melting of polar glaciers and frequent occurrence of severe and extreme weather. In order to reduce carbon dioxide emissions and achieve sustainable energy development, it is necessary to find some new materials and technical means. The technology of photocatalytic reduction of carbon dioxide can not only reduce the content of carbon dioxide, but also convert it into useful hydrocarbon fuels, thereby improving the two major problems of greenhouse effect and energy at the same time. [0003] Currently, for...

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Problems solved by technology

However, limited by the connection method of reversible reaction, the synthesis of COFs is relatively difficult. The choice of solvent in the reaction system and the use of negative pressure closed system play a crucial role in the formation process of reversible condensation, so there are relatively few reports using the reaction Synthesis of COFs via solvothermal

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