▎ 摘　　要

NOVELTY - Silicon-based covalent organic framework photoelectrode comprises a silicon substrate, and an electron conduction layer, a covalent organic framework layer and an electron medium layer which are sequentially arranged on one side of the silicon substrate from bottom to top. USE - Silicon-based covalent organic framework photoelectrode used in the regeneration of coenzyme nicotinamide adenine dinucleotide phosphate (claimed). ADVANTAGE - The silicon-based covalent organic framework photoelectrode fixes the electronic medium body on the covalent organic framework layer by way of forming coordination bond, it can greatly promote the electron transfer between the two, realizing the in-situ recovery and utilization of the electronic medium, preparation method is simple and convenient, without complex operation, which is good for industrial production in scale application. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing silicon-based covalent organic framework photoelectrode, which involves preparing and cleaning a silicon substrate, preparing an electron conduction layer on one side of the silicon substrate obtained to obtain a first complex, immersing the first complex in a precursor solution of a covalent organic framework layer, and growing the covalent organic framework layer on one side of an electron conduction layer of the first complex by adopting a solvothermal method to obtain a second complex, immersing the second complex in an electron mediator solution, and stirring to form an electron mediator layer on one side of the covalent organic framework layer of the second complex, thereby obtaining the silicon-based covalent organic framework photoelectrode.