Precious metal nanoparticle-modified porous carrier catalytic material and preparation method thereof

Abstract

The invention relates to a precious metal nanoparticle-modified porous carrier catalytic material and a preparation method thereof. The precious metal nanoparticle-modified porous carrier catalytic material comprises dendritic amphiphilic PEI@PS and precious metal M carried by the dendritic amphiphilic PEI@PS. The dendritic amphiphilic PEI@PS comprises a hydrophilic core PEI and an oleophylic shell PS chemically coating the hydrophilic core, and the precious metal M is one of Au, Pt, Ag and Pd. The preparation method comprises that the dendritic amphiphilic M@PEI@PS as a stabilizer, a vinyl monomer, a diene cross-linking agent, an initiator and a pore-foaming agent are mixed into an oil phase, the oil phase and water as a dispersant undergo thick water-in-oil emulsion polymerization reaction under the action of the initiator and the product is washed and dried, or comprises that the precious metal M is added into a water phase of a thick emulsion system adjusted by the dendritic amphiphilic PEI@PS, the mixture undergoes a polymerization reaction to produce a porous material and the porous material is reduced by a reducer. Compared with the existing catalytic material, the precious metal nanoparticle-modified porous carrier catalytic material has protruding stability and catalytic performances, has macroscopic dimension and can be easily separated from the reaction system and recycled.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials, and relates to a noble metal nanoparticle-modified porous carrier catalytic material and a preparation method thereof. Background technique [0002] According to statistics, more than 60% of the world's chemical products need to involve catalytic reactions in the production process, and a considerable part of them are heavy metal catalysts. Due to several reasons, the recovery of heavy metal catalysts is very important: (1) the catalyst itself is relatively expensive; (2) the discharge of heavy metal catalysts will cause serious environmental pollution; (3) high-quality products such as pharmaceutical production should strictly prevent the presence of heavy metals. [0003] In recent years, metal nanomaterials technology is in a period of vigorous development, especially the successful synthesis of high-quality zero-valent noble metal particles with quantum confinement effects and the...

AI Technical Summary

Problems solved by technology

At present, in the preparation process of porous catalytic materials, the main shortcomings are: the efficiency of surface functionalization is not high enough; the interaction with metal nanoparticles is not strong enough, so that the aging or falling of nanoparticles may occur, resulting in repeated Poor use performance, and even pollute the product

However, the direct one-pot synthesis of stable metal nanosupported porous materials has not yet been published.

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