A preparation method of uniform and ordered platinum cube or polyhedron nanoparticle array

Abstract

The invention discloses a method for preparing a uniform and ordered platinum cube or polyhedron nanoparticle array. The hole array obtained after plasma etching of the micellar array based on the diblock copolymer self-assembly template method is used as a template, and the open holes are used The array template encapsulates the platinum precursor and the ionic capping agent, so that the block copolymer self-assembly template method is compatible with the capping agent that controls the shape of platinum nanoparticles, and obtains non-spherical or linear shapes that are difficult to obtain by traditional block template methods. The configuration of platinum nanoparticles solves the problem of the incompatibility between the self-assembled template of the diblock copolymer and the organic capping agent, and solves the problem of the specific configuration of platinum nanoparticles that is difficult to obtain by the traditional block template method, and ensures that the cube The large-scale uniformity and high yield of polyhedral platinum nanoparticles solve the technical bottleneck of the preparation technology of highly uniform and repeatable special-shaped platinum nanoparticles, and help to realize the high efficiency of special-shaped platinum nanoparticle arrays in catalysis, optoelectronics, etc. application.

Description

Technical field: [0001] The invention relates to the technical field of nanoparticles, in particular to a method for preparing uniform and ordered platinum cube or polyhedron nanoparticle arrays. Background technique: [0002] Platinum nanoparticles have good physical and chemical stability, photosensitivity, electrical conductivity, and excellent redox catalytic ability for hydrogen, oxygen, alcohols, organic acids and other energy raw materials, so they are widely used in catalysis, energy conversion, In the fields of electronics and optics, it is used as an efficient catalyst or sensitizer in the process of mutual conversion of energy including chemical energy, light energy, and electrical energy. In practical applications, the shape of platinum nanoparticles is one of the most important factors affecting its various intrinsic properties. Nanoparticles of different shapes capped by different platinum crystal faces have their own characteristics in the arrangement of plat...

AI Technical Summary

Problems solved by technology

[0005] However, the micelle template used in the block copolymer self-assembly template method is a long-chain organic macromolecular polymer. If the capping agent is encapsulated while the nanoparticle precursor is encapsulated, the template is usually not compatible with the organic capping agent. It is complexation that affects the configuration and uniformity of the template itself and the loading process of the precursor, or repulsion so that the organic capping agent is not encapsulated; if the capping agent is added after the encapsulation of the precursor is completed, the capping agent is difficult to access Precursor, unable to complete the adsorption of specific crystal faces during the growth process

Therefore, at this stage, the preparation of platinum nanoparticles by this method does not involve the participation of capping agents, and the particle shape is mostly a single spherical or linear shape, and it is difficult to achieve other shapes and types.

The above problems not only hinder the application of the block copolymer self-assembly template method in the preparation of multi-configuration and multifunctional platinum nanoparticles, but also limit the development possibility of a high-uniform and high-repeatability special-shaped platinum nanoparticle preparation technology.

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