Method for preparing silver/silicon dixoide nucleocapsid structure nano particles

Abstract

A preparation method of Ag / SiO2 nucleocapsid structure nanoparticles belongs to particle preparation field. Taking AgNO3 as material and hexadecyl trimethyl ammonium bromide as surfactant, the invention prepares Ag nanoparticals by oxidation-reduction reaction in solution under a certain temperature. Reducer for reducing AgNO3 is hydrazinehydrate and ascorbic acid. Based on the prepared Ag nanoparticals, add ethanol and take TEOS as a source of SiO2 to prepare sol solution with SiO2 wrapping Ag nanoparticals. The method has simple operation and low cost. The prepared particles have distinct nucleocapsid structure, uniform granularity and good dispersibility. It has many application prospects in biology sterilization, chemistry and optical materials etc.

Description

technical field

[0001] The invention belongs to the field of nanoparticle preparation, in particular to a method for preparing silver / silicon dioxide core-shell nanoparticle Background technique

[0002] Nanomaterials, especially noble metal nanomaterials, have aroused widespread interest due to their unique properties different from traditional materials in mechanics, electricity, heat, optics, and catalysis. Among them, nano-silver particles are a widely used metal material. Its performance and potential applications in catalytic reactions, optical transmission, surface modification, and biochemical applications have attracted more and more attention. However, due to the high surface energy of nanoparticles at the nanometer size, there is a tendency to easily agglomerate in the medium, resulting in poor dispersion, which greatly limits the application of nanomaterials. Recently, by coating polymers on the surface of metal nanoparticles, surfactants and titanium dioxide ha...

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