Preparation method of Fe3O4@Au nuclear shell function material

A functional material, core-shell technology, applied in the field of nanomaterials with magnetic core-shell structure, can solve the problems of easy agglomeration of gold nanoparticles, easy agglomeration of particles, uneven size, etc., and achieves good dispersibility, uniform particle size distribution, Simple to use effects

Active Publication Date: 2016-08-31
JILIN NORMAL UNIV
View PDF7 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Shi Yanfeng and others used PEI as a protective agent to prepare monodisperse Fe with a diameter of about 40 nm by microwave synthesis. 3 o 4 Nanoparticles, further synthesized Fe with a core-shell structure by the "layer-by-layer method" and "seed growth method" 3 o 4 @Au nanoparticles, this synthesis method is simple, but gold nanoparticles are prone to agglomeration; in addition, Qin Huan et al. used mPEG-SH as a binder to modify Fe 3 o 4 Nanoparticles, also synthesized by the seed-grown Fe 3 o 4 @Au nanoparticles can be used as a

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of Fe3O4@Au nuclear shell function material
  • Preparation method of Fe3O4@Au nuclear shell function material
  • Preparation method of Fe3O4@Au nuclear shell function material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] a kind of Fe 3 o 4 The preparation method of @Au core-shell functional material comprises the following steps:

[0045] S1, the Fe 3 o 4 The nanoparticles were added into methanol and mixed to obtain solution A;

[0046] S2. Take polyethyleneimine and methanol for shaking and dissolving, add potassium hydroxide and carbon disulfide, stir for 10 minutes, add the solution A obtained in S1 dropwise, shake for 5 minutes, let stand, take the precipitate and wash it with water to obtain Fe 3 o 4 @PEI-DTC nanoparticles; the Fe 3 o 4 Add @PEI-DTC nanoparticles into water and mix to obtain solution B;

[0047] S3. Add the solution B obtained in S2 dropwise to the chloroauric acid aqueous solution, shake continuously during the dropwise addition, then let it stand, take the precipitate and wash it with water, add water and mix it to obtain solution C; add hydroboration dropwise to solution C Sodium aqueous solution, continuously shake during the dropping process, then sta...

Embodiment 2

[0049] a kind of Fe 3 o 4 The preparation method of @Au core-shell functional material comprises the following steps:

[0050] S1. Using iron acetylacetonate, oleic acid and benzyl ether as raw materials, in an argon atmosphere, heating to reflux for redox reaction to obtain Fe 3 o 4 Nanoparticles; the Fe 3 o 4 After the nanoparticles are washed with methanol, they are added to methanol and mixed to obtain solution A;

[0051] S2. Take polyethyleneimine and methanol for shaking and dissolving, add potassium hydroxide and carbon disulfide, stir for 13 minutes, add the solution A obtained in S1 dropwise, shake for 6.5 minutes, let it stand, take the precipitate and wash it with water to obtain Fe 3 o 4 @PEI-DTC nanoparticles; the Fe 3 o 4 Add @PEI-DTC nanoparticles into water and mix to obtain solution B;

[0052] S3. Add the solution B obtained in S2 dropwise to the chloroauric acid aqueous solution, shake continuously during the dropwise addition, then let it stand, t...

Embodiment 3

[0054] a kind of Fe 3 o 4 The preparation method of @Au core-shell functional material comprises the following steps:

[0055] S1. Using iron acetylacetonate, oleic acid and benzyl ether as raw materials, in an argon atmosphere, heat up to 290°C, reflux for 10 minutes, cool to room temperature, stand still to collect the precipitate, and use a mixed solvent composed of toluene and n-hexane in any proportion After cleaning, add in chloroform and store to obtain Fe 3 o 4 Nanoparticles; the Fe 3 o 4 After the nanoparticles were washed with methanol, they were added to methanol and mixed to obtain solution A, in which the volume ratio of oleic acid and benzyl ether was 1:11, and the weight-to-volume (g / ml) ratio of iron acetylacetonate and oleic acid was 0.65:1.6 , Fe 3 o 4 The weight-to-volume (mg / ml) ratio of nanoparticles and methanol is 1:8, among which, it is used to clean Fe 3 o 4 The amount of methanol used for nanoparticles is not included;

[0056] S2. Take poly...

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 preparation method of an Fe3O4@Au nuclear shell function material. The preparation method includes the following steps that S1, Fe3O4 nano-particles are added to methyl alcohol and mixed evenly, so that a solution A is obtained; S2, polymine and the methyl alcohol are subjected to oscillating dissolution, potassium hydroxide and carbon disulfide are added, the mixture is stirred for 10-15 minutes and dropwise added to the solution A obtained in the step S1, vibration is carried out for 5-8 minutes, standing is carried out, precipitation water is used for carrying out cleaning, and then Fe3O4@PEI-DTC nano-particles are obtained and added into water to be evenly mixed, so that a solution B is obtained; and S3, the solution B obtained in the step S2 is dropwise added to a chloroauric acid aqueous solution, vibration is carried out continuously in the dropwise adding process, then standing is carried out, precipitation water is used for carrying out cleaning, water is added to be evenly mixed, then a solution C is obtained, a sodium borohydride aqueous solution is dropwise added to the solution C, vibration is carried out continuously in the dropwise adding process, then standing is carried out, and precipitate is extracted and washed, so that the Fe3O4@Au nuclear shell function material is obtained.

Description

technical field [0001] The invention relates to the technical field of nanomaterials with a magnetic core-shell structure, in particular to a Fe 3 o 4 Preparation methods of @Au core-shell functional materials. Background technique [0002] Nanocomposites with core-shell structure have attracted extensive attention in recent years because of their special structures and properties. Composite magnetic nanoparticles with ferrite as the core and gold as the coating have also become one of the research hotspots in the field of core-shell nanocomposites. [0003] Fe 3 o 4 Magnetic nanomaterials are important magnetic materials with superparamagnetism, low Curie temperature, high resistivity, large dielectric constant and stable physical and chemical properties, but they are prone to agglomeration. In order to improve their chemical stability and biocompatibility, we need further surface modification of iron oxides. Because gold has good chemical stability and biocompatibili...

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
IPC IPC(8): B22F9/24B22F1/00C01G49/08
CPCC01G49/08B22F9/24C01P2004/04C01P2004/64B22F1/054B22F1/07
Inventor 刘洋寇蔷薇杨景海王雅新陈雷张小龙姜雨虹
Owner JILIN NORMAL UNIV
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