Olefin-linked pyridyl covalent organic framework materials, methods of making and applications thereof

Abstract

The application discloses an olefin-connected pyridyl covalent organic framework material and a preparation method and application thereof, and belongs to the technical field of photocatalysis. The material is formed by olefin bridging of 2,4,6-trimethyl-1,3,5-triazine monomers and aromatic aldehyde monomers containing pyridine units and bipyridine units, and 2,4,6-trimethyl-1,3,5-triazine, pyridine-2,5-dimethyl formaldehyde or 2,2'-bipyridine-5,5'-dimethyl formaldehyde are heated and reacted under sealed conditions; after the reaction is completed, natural cooling to room temperature is carried out, vacuum filtration is carried out and filter residues are collected, washing is carried out, and vacuum drying is carried out, and the material is obtained. The pyridine and bipyridine units are used for constructing different oxygen adsorption modes of Pauling type and Yeager type respectively, the oxygen reduction reaction path is changed, a two-step single electron path and a one-step two electron path are realized, the photocatalytic efficiency is effectively improved, and the material has a wide application prospect as a photocatalyst for photocatalytic oxygen reduction and synthesis of hydrogen peroxide.

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