Synthesizing method for silicon dioxide-silver nano-composite microspheres

A technology of composite microspheres and silica, applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve problems such as performance degradation, easy aggregation of single silver nanoparticles, and environmental pollution, so as to prevent agglomeration and reduce The amount of silver used, the effect of preventing agglomeration

Inactive Publication Date: 2016-05-11
西安艾菲尔德复合材料科技有限公司
View PDF0 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for synthesizing silicon dioxide / silver nanocomposite microspheres, which solves the problem that the existing single silver nanoparticle is prone to agglomeration, resulting in reduced performance and environmental pollution.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of synthetic method of silicon dioxide / silver nanocomposite microspheres, specifically implement according to the following steps:

[0032] Step 1, prepare Ag(NH 3 ) 2 OH solution

[0033] 1.1) Weigh AgNH 3 30mg, 10g of ultrapure water, sonicated to make it dissolve quickly to make AgNH 3 solution;

[0034] 1.2) Slowly add 0.3mL of 10% dilute ammonia water to AgNH 3 In the solution, react for 3 minutes;

[0035] 1.3) Add 10mL ultrapure water into the reaction solution to prepare Ag(NH 3 ) 2 OH solution.

[0036] Step 2, preparing silica / silver nanocomposite microspheres

[0037] 2.1) Weigh 30mgSiO2 2 Add the powder into 30mL ultrapure water, sonicate for 10min, then add 30mg of polyvinylpyrrolidone, and sonicate for 10min to prepare SiO 2 - polyvinylpyrrolidone mixture;

[0038] 2.2) Measure 10mL of the Ag(NH 3 ) 2 OH solution added to SiO 2 - In the polyvinylpyrrolidone mixture, stir in a water bath at 65°C for 10 minutes;

[0039] 2.3) Add 10mL ...

Embodiment 2

[0041] A kind of synthetic method of silicon dioxide / silver nanocomposite microspheres, specifically implement according to the following steps:

[0042] Step 1, prepare Ag(NH 3 ) 2 OH solution

[0043] 1.1) Weigh AgNH 3 40mg, 10g of ultrapure water, sonicated to make it dissolve quickly to make AgNH 3 solution;

[0044] 1.2) Slowly add 0.4mL of 10% dilute ammonia water to AgNH 3 In the solution, react for 4 minutes;

[0045] 1.3) Add 15mL ultrapure water into the reaction solution to prepare Ag(NH 3 ) 2OH solution.

[0046] Step 2, preparing silica / silver nanocomposite microspheres

[0047] 2.1) Weigh 45mgSiO 2 Add the powder into 30mL ultrapure water, sonicate for 12min, then add 45mg of polyvinylpyrrolidone, and sonicate for 12min to prepare SiO 2 - polyvinylpyrrolidone mixture;

[0048] 2.2) Measure 12mL of the Ag(NH 3 ) 2 OH solution added to SiO 2 -In the polyvinylpyrrolidone mixture, stir in a water bath at 70°C for 12 minutes;

[0049] 2.3) Add 12mL of ...

Embodiment 3

[0051] A kind of synthetic method of silicon dioxide / silver nanocomposite microspheres, specifically implement according to the following steps:

[0052] Step 1, prepare Ag(NH 3 ) 2 OH solution

[0053] 1.1) Weigh AgNH 3 50mg, 10g of ultrapure water, sonicated to make it dissolve quickly to make AgNH 3 solution;

[0054] 1.2) Slowly add 0.5mL of 10% dilute ammonia water into AgNH 3 In the solution, react for 5 minutes;

[0055] 1.3) Add 20mL ultrapure water into the reaction solution to prepare Ag(NH 3 ) 2 OH solution.

[0056] Step 2, preparing silica / silver nanocomposite microspheres

[0057] 2.1) Weigh 60mgSiO2 2 Add the powder into 30mL ultra-pure water, sonicate for 15min, then add 60mg of polyvinylpyrrolidone, and sonicate for 15min to obtain SiO 2 - polyvinylpyrrolidone mixture;

[0058] 2.2) Measure 15mL of Ag(NH) prepared in step 1 3 ) 2 OH solution added to SiO 2 - In the polyvinylpyrrolidone mixture, stir in a water bath at 75°C for 15 minutes;

[00...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a synthesizing method for silicon dioxide-silver nano-composite microspheres. The method particularly comprises the steps of preparing a Ag(NH3)2OH solution and preparing the silicon dioxide-silver nano-composite microspheres. According to the method, uniform SiO2 particles are synthesized by adopting a solution-gel method, a silver-ammonia solution and polyvinyl pyrrolidone are added, the silver-ammonia solution is reduced by ascorbic acid, and then the uniformly-dispersed dioxide-silver nano-composite microspheres are successfully prepared; by taking polyvinyl pyrrolidone as a surfactant and a dispersing agent, particle agglomeration in the silver nanoparticle synthesizing process is prevented; by loading silver nanoparticles on the surfaces of SiO2 nanoparticles, the silver using amount in the sterilizing process is decreased, and meanwhile the silver nanoparticles are prevented from being agglomerated in the catalytic process.

Description

technical field [0001] The invention belongs to the technical field of preparation of noble metal nanometer materials, and relates to a method for synthesizing silicon dioxide / silver nanocomposite microspheres. Background technique [0002] Noble metal nanoparticles have novel physical, chemical and biological properties, and are widely used in catalysis, sterilization, batteries, biomedicine and surface-enhanced Raman spectroscopy (SERS) detection and other fields. Among them, silver nanomaterials have unique optical, electrical, and magnetic properties, and have been widely used in electronic sensing, antibacterial materials, catalysts, and SERS substrates. [0003] The smaller the particle size of silver nanoparticles, the better the antibacterial effect. However, the high specific surface and free energy of silver nanoparticles lead to their agglomeration and affect their performance. During the catalytic reaction, since the metal nanoparticles are not protected, the h...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/50B01J35/08A01N59/16A01P1/00B82Y30/00
Inventor 齐海港
Owner 西安艾菲尔德复合材料科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap