Method for preparing noble metal/polymer nanometer hybrid particles

Abstract

The invention discloses a method for preparing noble metal / polymer nanometer hybrid particles, comprising the following steps: (1) preparing nanometer silicon dioxide particles enwrapped by a 4-vinylpyridine layer by taking the nanometer silicon dioxide particles as nucleus; and (2) loading noble metal on the 4-vinylpyridine layer to obtain the noble metal / polymer nanometer hybrid particles by taking the 4-vinylpyridine layer loading the noble metal as a shell layer and taking the nanometer silicon dioxide as the nucleus. For the nanometer particles with the nucleus shell structure by taking the 4-vinylpyridine layer loading the noble metal as the shell layer and taking the nanometer silicon dioxide as the nucleus, both the thickness of the 4-vinylpyridine layer and the grain diameter of the nanometer silicon dioxide can be adjusted, thereby the specific surface of the final noble metal / polymer nanometer hybrid particles is adjustable; and meanwhile, the 4-vinylpyridine is enwrapped on the surface of the nanometer silicon dioxide particles and can sufficiently load the noble metal so that the utility ratio of the 4-vinylpyridine is improved.

Description

technical field [0001] The invention relates to the field of preparation of polymer nano-hybrid particles loaded with precious metals. Background technique [0002] Gold and silver nanoparticles have become a research hotspot in recent years due to their properties in optics, electricity, catalysis, and surface-enhanced Raman. The properties of nanoparticles depend on the particle size, particle dispersion and stability. In recent years, the use of functionalized polymer microspheres to support and stabilize metal particles has become an important and effective means. [0003] In the prior art, polymer microspheres used to load precious metals are usually prepared by emulsion polymerization, seed emulsion polymerization, etc., for example, latex particles are formed by emulsion copolymerization of styrene and vinylpyridine, and then loaded with precious metal nanoparticles, Formation of noble metal / polymer nanohybrid particles (see: 1. WenF., Zhang W.Q.; Zheng P.W.; Zhang ...

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Problems solved by technology

[0003] In the prior art, polymer microspheres used to load precious metals are usually prepared by emulsion polymerization, seed emulsion polymerization, etc., for example, latex particles are formed by emulsion copolymerization of styrene and vinylpyridine, and then loaded with precious metal nanoparticles, Formation of noble metal / polymer nanohybrid particles (see: 1. WenF., Zhang W.Q.; Zheng P.W.; Zhang X.; Yang X.L.; Wang Y.; Jiang X.W.; Wei G.W., ShiL.Q. Journal of Polymer Science: Part A: Polymer Chemistry, 2008, 46, 1192-1202.; 2. Wen Xiaoli, Yang Mu, Ding Hangjun, Wang Ge. Chemical Bulletin, 2008, 3, 205-210); in the prior art, due to the synthesis of For the latex particles of styrene and vinylpyridine, part of the vinylpyridine is inside the latex particle and cannot be loaded with noble metals, so the utilization rate of vinylpyridine is not high. Secondly, as a functionalized polymer shell, its adjustability is limited. limits

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