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Preparation method of Fe-Au alloy nanoparticles with bcc structures

A technology of alloy nanoparticles and gold nanoparticles, which is applied in the field of preparation of Fe-Au alloy nanoparticles, achieves the effects of uniform shape and size, simple preparation process and mild preparation conditions

Inactive Publication Date: 2019-01-18
NORTHWESTERN POLYTECHNICAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of dumbbell-shaped bcc-Fe-Au nanoparticles with novel structures and composite functions has not been reported yet.

Method used

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  • Preparation method of Fe-Au alloy nanoparticles with bcc structures
  • Preparation method of Fe-Au alloy nanoparticles with bcc structures
  • Preparation method of Fe-Au alloy nanoparticles with bcc structures

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 Preparation of Au nanoparticles with a particle size of 5nm

[0029] Such as figure 1 Shown in (a) is that particle diameter is the transmission electron microscope figure (TEM) of the Au nanoparticle of 5nm, and its preparation method is: under 4 ℃ of argon protections, 0.2g chloroauric acid is dissolved in 10ml tetrahydronaphthalene and In 10ml of oleylamine, magnetic stirring was used to dissolve it completely, and the stirring rate was 600rpm / min to obtain a golden yellow solution A. 90 mg of borane-tert-butylamine complex TBAB was dissolved in 1 ml of tetralin and 1 ml of oleylamine under ultrasonication to obtain a transparent solution B. Slowly inject solution B into solution A under magnetic stirring to obtain mixed solution C. After the mixed solution C was stirred at 4°C for 2 hours, a maroon solution D was obtained. Add 40ml of acetone to solution D, centrifuge at a high speed of 10000rpm for 8 minutes and discard the solvent. The obtained produc...

Embodiment 2

[0030] Example 2 Preparation of Au nanoparticles with a particle size of 8nm

[0031] Such as figure 1 Shown in (b) is the transmission electron microscope figure (TEM) of the Au nanoparticle with a particle diameter of 8nm, and its preparation method is: under the protection of argon gas at room temperature, the 5nm Au nanoparticle prepared by the above-mentioned embodiment 1 of 30mg Dissolve in 10ml 1-octadecene, 10ml oleylamine and 0.1g chloroauric acid mixed solution under magnetic stirring. Then, the temperature of the system was raised to 80° C. at 5° C. / min, and cooled to room temperature after reacting for 2 hours. Add 40ml of isopropanol to the solution, centrifuge at a high speed of 10000rpm for 8 minutes and discard the solvent. The obtained product is dispersed in 20ml of n-hexane, washed twice with 40ml of ethanol and dried to obtain 8nm gold nanoparticles.

Embodiment 3

[0032] Embodiment 3 preparation cetylamine hydrochloride

[0033] Preparation of cetylamine hydrochloride comprises the following steps: (1) preparing 12ml, 1M diethyl ether solution A of hydrochloride;

[0034] (2) 10mmol of hexadecylamine was dissolved in 100ml of n-hexane to obtain solution B;

[0035](3) Slowly drop solution A into solution B under ice bath and magnetic stirring conditions. After producing a large amount of white precipitates, the system was warmed up to room temperature and continued to stir for 2 hours;

[0036] (4) Remove the solvent of the system, wash the precipitate three times with n-hexane, and obtain cetylamine hydrochloride after drying.

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Abstract

The invention provides a preparation method of a Fe-Au alloy nanoparticles with bcc structures which comprises the following steps: preparing Au nanoparticles with different grain sizes, adding the Aunanoparticles into a mixed solution under magnetic stirring and N2 protection, heating and cooling, injecting carbonyl iron into the system for reaction, reducing the temperature after the reaction,adding oleic acid, reacting at 160 DEG C for a period of time, cooling to room temperature, adding isopropanol into the solution, centrifuging and separating, removing the solvent, and dispersing theobtained product in n-hexane, washing by using ethanol for twice, and drying to obtain the Fe-Au alloy nanoparticles with bulk-centered cubic structures (bcc structures). The Fe-Au alloy nanoparticleswith the bulk-centered cubic structures (bcc structure) not only have the optical and biological properties of gold nanoparticles, but also have the magnetism of bcc-Fe nanoparticles, meanwhile, heterogeneous nanoparticles can provide different modified surfaces, can be connected with different organic small molecule fluorescent probes to generate multiple composite effects.

Description

technical field [0001] The invention belongs to the field of metal functional materials, in particular to a method for preparing Fe-Au alloy nanoparticles (bcc-Fe-Au nanoparticles) with a bcc structure. Background technique [0002] Nanoparticles with complex functions have attracted more and more attention from researchers because of their various properties. In order to prepare nanoparticles with composite functions, researchers usually use the method of adding surfactants, especially some polymer compounds, to prepare nanoparticles by co-precipitation method. The nanoparticles prepared by this method have better water solubility, but due to the introduction of Polymer compounds limit the application of this type of nanoparticles. The polymer compound is like a thick coat that affects the magnetic response of nanoparticles, and there is also a certain degree of complexity in the surface treatment process. How to use a simple method to prepare high-quality nanoparticles wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/24B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00B22F9/24B22F1/054
Inventor 周熹
Owner NORTHWESTERN POLYTECHNICAL UNIV
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