Ultra-thin nanosheet self-assembled multi-layer BiOCl microsphere and application thereof in photocatalytic coupling of benzylamine to imine

Abstract

The invention discloses an ultra-thin nanosheet self-assembled multi-layer BiOCl microsphere and an application thereof in photocatalytic coupling of a benzylamine to an imine, and belongs to the technical field of photocatalytic material preparation. The ultra-thin nanosheet self-assembled multi-layer BiOCl microsphere is prepared by a solvothermal method by using Bi(NO3)<3>.5H2O and KCl as raw materials and ethylene glycol as a medium under assistance of a surfactant PVPK30. The nano microsphere has a diameter of 1.3-1.6 [mu]m, and the ultra-thin BiOCl nanosheet constituting the microsphere has an average thickness of 3.8 nm. The BiOCl nano microsphere has relatively high activity in photocatalytic coupling of a benzylamine to a corresponding imine, and problems of long reaction time, low conversion rate and the like in preparation of an imine of a conventional BiOCl material are solved. The microsphere has the advantages of simple process, short preparation period, green environment protection, high conversion rate, high stability, and being reusable, actual production needs are met, and application potential is relatively great.

Description

technical field [0001] The invention belongs to the field of photocatalytic material preparation and technology, and specifically relates to a self-assembled multi-level BiOCl microsphere of ultrathin nanosheets and its application in photocatalytic oxidation coupling benzylamine to imine. Background technique [0002] As a pharmaceutical intermediate and fine chemical, imine is widely used in many fields. In the traditional industrial synthesis, it is mainly formed by condensation of primary amines and corresponding carbonyl compounds, and noble metals are often used as catalysts, and the synthesis is carried out at high temperature for a long time. It has the disadvantages of high cost, many by-products, and low reaction efficiency. Therefore, it is of great significance to explore an economical, efficient and environmentally friendly production method of imines. Synthesis of corresponding imines by self-coupling of primary amines is a feasible route. The oxidative coup...

AI Technical Summary

Problems solved by technology

However, under the irradiation of visible light, most bulk catalysts have the disadvantage of low separation of photogenerated carriers, which is not conducive to better conversion of benzylamine to the corresponding imine.

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