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Silver-ferric oxide core-shell nanoparticles and preparation method thereof

A ferroferric oxide and nanoparticle technology, which is applied in the direction of microsphere preparation, microcapsule preparation, and the magnetism of inorganic materials, can solve the problem of poor magnetic response, inability to produce the target product, and affecting the magnetic properties of ferroferric oxide, etc. problem, to achieve the effect of scientific preparation method, good magnetic response and wide application prospect

Inactive Publication Date: 2016-03-02
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are deficiencies in both the silver / magnetic nanoparticles and the preparation method. First, although the final product has a good antibacterial effect, it does not have the tunability of optical properties, and it is difficult to be used for optical applications. There are many fields that require performance adjustability; secondly, after elemental silver is coated with ferric oxide, it will affect the normal performance of the magnetic properties of ferric oxide and make the magnetic response worse; finally, the preparation method cannot produce Other target products other than the final product to overcome the above-mentioned defects of the final product

Method used

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  • Silver-ferric oxide core-shell nanoparticles and preparation method thereof
  • Silver-ferric oxide core-shell nanoparticles and preparation method thereof
  • Silver-ferric oxide core-shell nanoparticles and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0025] The concrete steps of preparation are:

[0026] Step 1, according to the molar ratio between ferric nitrate, silver nitrate and ethylene glycol is 1:0.15:0.225, ferric nitrate and silver nitrate are dissolved in ethylene glycol, and stirred for 25 minutes to obtain a mixed solution. Then sodium acetate is added into the mixed solution; wherein, the molar ratio of sodium acetate to ferric nitrate in the mixed solution is 0.8:9 to obtain a precursor solution.

[0027] Step 2, the precursor solution is placed in a closed state, and reacted at 180 ° C for 24 hours; the obtained product is similar to figure 1 shown, and as figure 2 , image 3 and Figure 4 Precipitate shown in the curve in - Ag-Fe3O4 core-shell nanoparticles.

Embodiment 2

[0029] The concrete steps of preparation are:

[0030] Step 1, according to the molar ratio between ferric nitrate, silver nitrate and ethylene glycol is 1:0.26:0.213, ferric nitrate and silver nitrate are dissolved in ethylene glycol, and stirred for 28 minutes to obtain a mixed solution. Add sodium acetate into the mixed solution; wherein, the molar ratio of sodium acetate to ferric nitrate in the mixed solution is 0.9:9 to obtain a precursor solution.

[0031] Step 2, put the precursor solution in a closed state, and react at 190°C for 19h; figure 1 shown, and as figure 2 , image 3 and Figure 4 Precipitate shown in the curve in - Ag-Fe3O4 core-shell nanoparticles.

Embodiment 3

[0033] The concrete steps of preparation are:

[0034] Step 1, according to the molar ratio between ferric nitrate, silver nitrate and ethylene glycol is 1:0.38:0.2, ferric nitrate and silver nitrate are dissolved in ethylene glycol, and stirred for 30 minutes to obtain a mixed solution. Then sodium acetate is added into the mixed solution; wherein, the molar ratio of sodium acetate to ferric nitrate in the mixed solution is 1:9 to obtain a precursor solution.

[0035] Step 2, put the precursor solution in a closed state, and react at 200°C for 14h; figure 1 shown, and as figure 2 , image 3 and Figure 4 Precipitate shown in the curve in - Ag-Fe3O4 core-shell nanoparticles.

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Abstract

The invention discloses a silver-ferroferric oxide core-shell nano-particles and the preparation method thereof. The particles are nano-particles with a core-shell structure taking silver and ferroferric oxide as a casing, the particle size of the particles is 160 to 230 mm, wherein the silver refers to silver nano-particles with the particle size of 60 to 90 nm, and the thickness of the ferroferric oxide casing is 50 to 70 nm; the method comprises the followings: dissolving ferric nitrate and silver nitrate into ethylene glycol according to the molar ratio of the ferric nitrate, the silver nitrate and the ethylene glycol of 1 to 0.15-0.6 to 0.175-0.225, then stirring for at least 25 min to obtain mixed liquor, then adding sodium acetate into mixed liquor so as to obtain precursor liquid, wherein the molar ratio of natrium aceticum and natrium aceticum in the mixed liquor is 0.8-1.2 to 9, subsequently, the precursor liquid is placed under a tightly closed state for reaction for 4 to 24 h under the temperature of 180 to 220 DEGC, so as to obtain silver-ferroferric oxide core-shell nano-particles.

Description

technical field [0001] The invention relates to a core-shell nanoparticle and a preparation method, in particular to a silver-ferric oxide core-shell (AgFe 3 o 4 ) nanoparticles and methods for their preparation. Background technique [0002] With the rapid development of nanotechnology and materials science, physical chemistry, biomedical technology and other disciplines, materials with a single performance are far from meeting the needs of practical applications. Therefore, the design and control of synthesizing nanomaterials with special structures and multifunctionality has become an important issue. imminent. Hybrid materials with excellent performance can be prepared through functional compounding, performance complementation and optimization of two or more materials. The properties of hybrid materials are not only the simple summation of the properties of each component, but they can also take advantage of the interaction between the two to form new materials with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/12H01F1/33B01J13/02
Inventor 张云霞潘书生罗媛媛许思超丁华霖刘艳颜李广海
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI