Method for preparing simple and controllable nanoscale silver-loaded monox

A silver silicon oxide, nano-scale technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of uneven distribution and difficulty in further reducing the size of silver nanoparticles, and achieve distribution Uniform, to meet the needs of large-scale industrial production, the effect of strong operability

Inactive Publication Date: 2015-10-07
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems in the prior art that the size of silver nanoparticles on the surface of colloidal microspheres is difficult to further reduce and the distribution is not uniform enough, the present invention provides a simple and controllable method for preparing nanoscale silver-loaded silica

Method used

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  • Method for preparing simple and controllable nanoscale silver-loaded monox
  • Method for preparing simple and controllable nanoscale silver-loaded monox
  • Method for preparing simple and controllable nanoscale silver-loaded monox

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] a. Mix 160mL of absolute ethanol and 6mL of TEOS; mix 7mL of concentrated ammonia water, 40mL of water and 20mL of absolute ethanol, add to the above mixture, and stir at 25°C for 12 hours.

[0039] b. Centrifuge the solution obtained in step a. at room temperature, wash and dry to obtain monodisperse spherical SiO 2 particles.

[0040] c. 1g of SiO obtained in step b. 2 Disperse the particles and 8mL aminosilane coupling agent in 120mL toluene, and reflux at 80°C for 24 hours;

[0041] d. The mixture obtained in step c. was centrifuged and washed three times with absolute ethanol and water respectively, and then ultrasonically dispersed in 60 mL of water.

[0042] e. Take step d. Gained SiO 2 20mL of aqueous solution, add dropwise 20mL, 0.2M silver ammonia solution, and stir at 15°C for 24 hours;

[0043] f. Wash and centrifuge the mixed solution obtained in step e. for 3 times, and dry to obtain nano-scale silver-loaded SiO 2 particles.

[0044] The test shows t...

Embodiment 2

[0046] a. Mix 160mL of absolute ethanol and 6mL of TEOS; mix 7mL of concentrated ammonia water, 40mL of water and 20mL of absolute ethanol, add to the above mixture, and stir at 25°C for 12 hours.

[0047] b. Centrifuge the solution obtained in step a. at room temperature, wash and dry to obtain monodisperse spherical SiO 2 particles.

[0048]c. 1g of SiO obtained in step b. 2 Disperse the particles and 4mL aminosilane coupling agent in 120mL toluene, and reflux at 80°C for 24 hours;

[0049] d. The mixture obtained in step c. was centrifuged and washed three times with absolute ethanol and water respectively, and then ultrasonically dispersed in 60 mL of water.

[0050] e. Take step d. Gained SiO 2 20mL of aqueous solution, add dropwise 20mL, 0.2M silver ammonia solution, and stir at 15°C for 24 hours;

[0051] f. Wash and centrifuge the mixed solution obtained in step e. for 3 times, and dry to obtain nano-scale silver-loaded SiO 2 particles.

[0052] The test shows th...

Embodiment 3

[0054] a. Mix 160mL of absolute ethanol and 6mL of TEOS evenly, and heat up to 50°C; mix 7mL of concentrated ammonia water, 10mL of water and 20mL of absolute ethanol, add to the above mixture, and stir at 50°C for 8 hours.

[0055] b. Centrifuge the solution obtained in step a. at room temperature, wash and dry to obtain monodisperse spherical SiO 2 particles.

[0056] c. 1g of SiO obtained in step b. 2 Disperse the particles and 4mL aminosilane coupling agent in 120mL toluene, and reflux at 80°C for 24 hours;

[0057] d. The mixture obtained in step c. was centrifuged and washed three times with absolute ethanol and water respectively, and then ultrasonically dispersed in 60 mL of water.

[0058] e. Take step d. Gained SiO 2 20mL of aqueous solution, add dropwise 20mL, 0.05M silver ammonia solution, and stir at 15°C for 6 hours;

[0059] f. Wash and centrifuge the mixed solution obtained in step e. for 3 times, and dry to obtain nano-scale silver-loaded SiO 2 particles....

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Abstract

The invention provides a method for preparing simple and controllable nanoscale silver-loaded monox. The method comprises the specific steps that (1) monodispersed spherical nanometer SiO<2> particles are prepared through a Stober method; (2) a reducibility group is decorated on the surface of a nanometer SiO<2> sphere; (3) silver particles with the diameter of 1-3 nm are reduced on the surface of the nanometer SiO<2> sphere. The obtained silver-loaded monox is regular in form and even in particle size, and the particle size and density of the silver particles on the surface of the silver-loaded monox can be regulated and controlled easily; the overall preparation technology is easy and feasible, a product system is stable, and the industrial preparation potential is achieved.

Description

technical field [0001] The invention relates to the field of preparation of nanomaterials, in particular to a simple and controllable preparation method of nanoscale silver-loaded silicon oxide. Background technique [0002] Due to their unique optoelectronic properties that are different from condensed phases and individual molecules, metal nanoparticles have applications such as biomarkers, surface Raman enhancement, solar cells, color-changing components, light-emitting films, nonlinear optical switches, and high-density information storage systems. great potential in other fields. Among them, the specific optical properties exhibited by colloidal particles coating or depositing functional metal nanoparticles are highly valued by researchers in the field of materials. [0003] Silver nanoparticles exhibit strong plasmonic optical response characteristics due to the excitation of free electrons on the surface, and are widely used in electrostatic shielding coatings, steri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/02B82Y40/00B82Y30/00
Inventor 何丹农张彬周涓朱君金彩虹
Owner SHANGHAI JIAO TONG UNIV
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