Process for producing platinum metal nano-particle for catalysis with polymer microsphere as carrier

Abstract

The invention relates to a preparation method of catalytic platinum metal nano particles using polymeric microspheres as a carrier, pertaining to technological field of polymer material and metal nano catalytic material. The invention can synthesize a special type of terpolymer polymeric microspheres of polyamide macro-molecular monomer ingrafted acrylonitrile / styrene through dispersion copolymerization; the catalyst can utilize soluble platinic acid as a source of platinum, and in-situ reduce platinum metal ions into platinum atoms on the surfaces of polymeric microspheres through the complexation reaction between platinum metal ion and a acidamide group, while the acidamide group is located at a hydrophilic polyamide long train of the surface of polymeric microspheres; the polymeric microspheres can be continuously grown and form into stable platinum metal nano particles using polymeric microspheres as the carrier, with the platinum particle diameter be controlled between 2 to 50nm and uniformly dispersed on the surfaces of the polymeric microspheres. The preparation process of the invention has moderate reaction conditions, simply and easily carried method, and the prepared platinum metal nano particles can be used as the catalyst of various chemical reaction.

Description

technical field

[0001] The invention discloses a preparation method of platinum metal nanoparticles for catalysis with polymer microspheres as the carrier, belonging to the technical field of polymer materials and metal nano-catalysis materials. Background technique

[0002] Platinum metal nanoparticles have a large specific surface area and have surface effects, small size effects, quantum size effects, and macroscopic quantum tunneling effects, which make platinum metal nanoparticles have better catalytic performance than macroscopic substances. Catalysts with important chemical reaction efficiency can be used in the polymerization of monomers, hydrogenation reactions, degradation of organic waste, treatment of waste gas and wastewater, and purification of the environment. They are widely used in fuel cells, petrochemicals, and automobile exhaust purification. However, due to the large specific surface area of ​​platinum metal nanoparticles, they have high activity, are ea...

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