Patch constrained porous carrier catalytic material and preparation method and applications thereof

Abstract

The invention relates to a patch constrained porous carrier catalytic material and a preparation method and applications thereof. The patch constrained porous carrier catalytic material comprises a porous carrier and nanometer composite particles loaded onto the porous carrier; the nanometer composite particles are patches containing precious metal nanoparticles. In preparation, concentrated emulsion polymerization method is adopted to load the nanometer composite particles onto the porous carrier; the patch constrained porous carrier catalytic material is taken as a heterogenous catalyst, andis used for catalyzing chemical reaction in a water phase or oil phase reaction system. Compared with the prior art, the advantages are that: the precious metals nanoparticles with catalysis effect are constrained with patches composed of dendritical amphiphiles, and are loaded onto the surface of the porous carrier material, strong and weak ligand synergistic effect is adopted in regulation andcontrol of the stability and the catalytic activity of the precious metal nanoparticles, so that the catalytic material is more durable, and the stability of the precious metal nanoparticles is high.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials, and relates to a patch-constrained porous carrier catalytic material and a preparation method and application thereof. Background technique [0002] At present, about 60% of chemical products need to use catalytic materials in production, and heavy metal catalysts are an important catalytic material. The heavy metal catalyst itself is relatively expensive, and more importantly, the leakage of the heavy metal catalyst will cause serious environmental pollution. At the same time, the metal residue in the product will also seriously affect the quality of the product, especially the production of human medicine. Therefore, the heavy metal catalyst Stability and recyclability are very important in some catalytic processes, the key lies in the ligand and support design of noble metals. [0003] The leakage of zero-valent noble metal nanoparticles mainly has the following methods: one is th...

AI Technical Summary

Problems solved by technology

When small molecular thiols are used as ligands, they have a strong interaction with noble metals, and the precious metals are not easy to lose and age, but thiol ligands are easy to cause the noble metals to lose their catalytic activity; while weak ligands (such as amines and alcohols) interact with noble metals Weak, although it ensures the high catalytic activity of noble metals, it is easy to cause the loss and aging of noble metal nanoparticles

Images