Novel covalent organic framework photocatalyst with fine-tuned band structure, and method for production of formic acid from carbon dioxide by applying the same to a photocatalyst-enzyme integrated system

摘要

A visible light absorption photocatalyst comprising a covalently bonded organic skeleton formed by reacting a compound represented by Formula 1 and a compound represented by Formula 2 is disclosed. In one aspect of the present invention, the visible light-absorbing photocatalyst comprising a covalent organic framework (COF) having a precisely controlled band structure is the band of the photocatalyst by simply controlling the number of hydroxyl groups in the unit structure. The gap energy and band structure can be precisely controlled. In addition, when the new COF photocatalyst is applied to the carbon dioxide conversion reaction, it shows about twice the improved formic acid production performance compared to the previously reported COF photocatalyst, thereby increasing the possibility of practical use of the carbon dioxide conversion industry using solar power in the future. Furthermore, the present invention, which precisely controls the optical properties of the photocatalyst, that is, the band structure and the bandgap energy by a synthetic method, is expected to be applied to other materials to realize the optimal bandgap energy and band structure according to the application reaction. .