Montmorillonite-loaded nano Pd/Cu catalyst and in-situ one-pot preparation and application thereof

Abstract

The invention discloses a montmorillonite-loaded nano Pd / Cu catalyst and in-situ one-pot preparation and application thereof. The catalyst is prepared by taking montmorillonite as a carrier by taking absolute ethyl alcohol as a solvent and a reducing agent, and by adopting an in-situ one-pot method in one step under solvothermal conditions. The preparation and after-treatment of the catalyst are simple in steps, any surfactant is not needed to be added, the reaction system is green and environment-friendly, the problem that bimetallic nanoparticles are difficultly obtained in a solvent system is solved, and the shape, size and metal ratio of the catalyst are effectively controlled. The prepared catalyst can be used for efficiently catalyzing a Sonogashira cross-coupling reaction of aryl iodides and aryl terminal alkyne or alkyl terminal alkyne under a mild condition, the amount of the catalyst is small, the yield of the target product is high, and the catalyst can be applied to construction of Csp-Csp2 bond structures.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to an in-situ preparation method of montmorillonite-loaded nanoparticles, and relates to the application of the catalyst obtained by the method in catalyzing Sonogashira cross-coupling reactions. Background technique [0002] Bimetallic nanoparticles have attracted great interest for their wide applications in catalysis, electricity, magnetism, and optics. Among them, Pd-containing bimetallic nanoparticles have attracted extensive attention in catalyzing organic reactions due to their excellent catalytic properties. Since the 1990s, various Pd-containing bimetallic nanoparticles have emerged and been applied in many fields of catalytic reactions. However, although various studies have shown that bimetallic nanoparticles with controllable size, shape and composition have greater advantages in terms of catalytic activity, the preparation of nanoparticles with the above ...

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Problems solved by technology

However, although various studies have shown that bimetallic nanoparticles with controllable size, shape and composition have greater advantages in terms of catalytic activity, the preparation of nanoparticles with the above various characteristics, especially Pd-based bimetallic nanoparticles, is a challenge for researchers. still challenging

The commonly used hydrothermal method, solvothermal method and various template methods need to add various surfactants and various strong reducing agents to control the shape, size or metal ratio. If you want to use a simple system to obtain a composition-controllable There are still difficulties in bimetallic nanoparticles and making them have a more uniform particle size distribution and better catalytic effect

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