US 9,040,448 B2 · Method of manufacturing spherical mesoporous silica containing dispersed silver nanoparticles, and spherical mesoporous silica manufactured by said method

Abstract

The present invention relates to a method of preparing a spherical mesoporous silica structure containing silver nanoparticles dispersed therein by adding a silver nitrate solution to an aqueous surfactant solution and performing a sol-gel process and to spherical mesoporous silica prepared thereby. The spherical mesoporous silica is cost-effective compared to a conventional method that uses silver nanoparticles as a raw material, because the silver nitrate solution that is inexpensive compared to silver nanoparticles is used. Also, the spherical mesoporous silica can be with high productivity in large amounts, and thus is easily commercialized. Moreover, because silver nanoparticles are incorporated into the pores of the mesoporous silica, the silver nanoparticles are used stably and do not change color and odor. In addition, the spherical mesoporous silica exhibits various additional effects, including far-infrared ray emission and deodorization, attributable to silica.

Claims18

Dependent claims

A method for preparing spherical mesoporous silica containing silver nanoparticles dispersed therein, the method comprising the steps of:

(P100) adding a template to an aqueous alcohol solution, and then heating and dissolving the template, followed by cooling to room temperature, thereby forming a gel having a micelle structure;
(P200) adding a 5% silver nitrate solution to the gel solution to form an aqueous solution of a silver ion-amine complex compound;
(P300) adding a silica precursor to the gel solution containing the silver ion-amine complex compound formed therein, followed by stirring to form spherical mesoporous silica by a sol-gel process and to attach the silver ion-amine complex compound to the inside of the spherical mesoporous silica;
(P400) adding a reducing agent to convert silver ions in the silver ion-amine complex compound, attached to the inside of the spherical mesoporous silica, to silver nanoparticles;
and
(P500) filtering the spherical mesoporous silica using a vacuum system, removing the remaining reducing agent from the filtered spherical mesoporous silica, and removing dodecylamine present in the spherical mesoporous silica with hot ethanol, followed by drying.

3 more elements

Dependencies are inferred from the claim text.

Method of manufacturing spherical mesoporous silica containing dispersed silver nanoparticles, and spherical mesoporous silica manufactured by said method

Life of this patent

Method of manufacturing spherical mesoporous silica containing dispersed silver nanoparticles, and spherical mesoporous silica manufactured by said method

Life of this patent

Abstract

Claims18