Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A preparation method of monodisperse fept/fe3o4 mixed nanoparticles

A nanoparticle and monodisperse technology, applied in the nano field, can solve the problems of destroying the dispersibility of the original system, agglomeration of nanoparticles, loss of dispersion effect, etc., and achieve the effect of high utilization rate, stable particle dispersion and cost saving.

Active Publication Date: 2018-08-28
NORTHEASTERN UNIV LIAONING
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, the operation process is complicated and the steps are cumbersome; secondly, due to the different preparation methods of the two particles, the dispersion system used is also different. During the mixing process of the two, there may be interaction of the dispersion system and the dispersion effect will be lost. In addition, the acid-base conditions or hydrophilicity and hydrophobicity of different particles are different when they are synthesized, so the functional groups adsorbed on the surface of the particles to maintain their dispersion are also different, and the dispersion of the original system will also be destroyed during the mixing process.

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
  • A preparation method of monodisperse fept/fe3o4 mixed nanoparticles
  • A preparation method of monodisperse fept/fe3o4 mixed nanoparticles
  • A preparation method of monodisperse fept/fe3o4 mixed nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A monodisperse FePt / Fe 3 o 4 A method for preparing mixed nanoparticles, comprising the following steps:

[0036] Step 1, thermal decomposition and reduction to prepare FePt nanoparticles

[0037] In Ar atmosphere, oleic acid, oleylamine, 1,2-hexadecanediol, Pt(acac) 2Add dibenzyl ether in turn, stir evenly, place in a heating furnace for preheating, the preheating temperature is 100°C, and the preheating time is 30min, then, add Fe(CO) 5 , heated to 185°C and kept for 1h to obtain FePt nanoparticles;

[0038] Among them, by volume ratio, oleic acid: oleylamine: Fe(CO) 5 : dibenzyl ether = 1: 2: 0.03: 5; molar ratio, Fe(CO) 5 : 1,2-Hexadecanediol: Pt(acac) 2 =2:1:1;

[0039] Step 2, in situ heating to prepare monodisperse FePt / Fe 3 o 4 Hybrid Nanoparticles:

[0040] (1) FePt nanoparticles are dispersed in n-hexane to obtain a n-hexane solution of FePt nanoparticles with a mass concentration of 0.5g / L;

[0041] (2) Add a n-hexane solution of FePt nanoparticles...

Embodiment 2

[0047] A monodisperse FePt / Fe 3 o 4 The preparation method of mixed nanoparticles is the same as in Example 1, the difference is that in the whole process, a magnetic field with a magnetic field strength of 6T is added to obtain monodisperse FePt / Fe 3 o 4 mixed nanoparticles;

[0048] The monodisperse FePt / Fe that present embodiment makes 3 o 4 The TEM images of the mixed nanoparticles are shown in figure 1 (b), from figure 1 (b) It can be seen that under the condition of applying a strong magnetic field, FePt / Fe was successfully prepared 3 o 4 Hybrid nanoparticles, FePt nanoparticles (A) and Fe 3 o 4 The dispersion of nanoparticles (B) is still good, and the strong magnetic field does not affect the dispersion of nanoparticles.

[0049] The monodisperse FePt / Fe that present embodiment makes 3 o 4 In the mixed nanoparticles, the size distribution of FePt nanoparticles is shown in Fig. 2(b), FePt 3 o 4 The size distribution diagram of the nanoparticles is shown in...

Embodiment 3

[0052] A monodisperse FePt / Fe 3 o 4 A method for preparing mixed nanoparticles, comprising the following steps:

[0053] Step 1, preparing FePt nanoparticles by thermal decomposition and reduction, same as Example 1;

[0054] Step 2, in situ heating to prepare monodisperse FePt / Fe 3 o 4 Hybrid Nanoparticles:

[0055] (1) FePt nanoparticles are dispersed in n-hexane to obtain a n-hexane solution of FePt nanoparticles with a mass concentration of 0.5g / L;

[0056] (2) In the mixed solvent of oleic acid, oleylamine, octadecene and dibenzyl ether, add the n-hexane solution of FePt nanoparticle, obtain reaction system; Wherein, by volume ratio, oleic acid: oleylamine: octadecene : dibenzyl ether=1: 1: 1: 2; the mass concentration of FePt nanoparticles in the mixed solvent is 2g / L;

[0057] The reaction system was heated to 250°C in the atmosphere, the heating rate was 5°C / min, and the temperature was kept for 1h to prepare monodisperse FePt / Fe 3 o 4 Mix nanoparticles.

[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 method for preparing monodisperse FePt / Fe3O4 mixed nano particles, which belongs to the field of nanotechnology. The preparation method includes: (1) in an inert gas atmosphere, sequentially add oleic acid, oleylamine, reducing agent, and Pt(acac)2 into the solvent, stir evenly, preheat at 100-120° C. for 5-30 minutes, and add Fe (CO)5, heat up to 150-280°C and keep it warm for 1-2h to prepare FePt nanoparticles; (2) add FePt nanoparticles dispersed in alkane solvent to the reaction solvent, and heat the system to 50°C in a certain atmosphere. ~250°C, heat preservation for 0.5~4h, to prepare monodisperse FePt / Fe3O4 mixed nanoparticles. The method uses an in-situ method to prepare FePt / Fe3O4 mixed nanoparticles, which has the advantages of low cost, simple operation, high product quality, and good stability. This method is used to prepare monodisperse FePt / Fe3O4 mixed nanoparticles, which are multifunctional The application and development of composite nanoparticles provide convenient conditions.

Description

technical field [0001] The invention belongs to the field of nanotechnology, in particular to a monodisperse FePt / Fe 3 o 4 Preparation method of hybrid nanoparticles. Background technique [0002] Monodisperse Fe 3 o 4 Magnetic nanoparticles have the remarkable characteristics of good soft magnetism and strong biocompatibility, and have broad application prospects in the fields of magnetic separation, medical imaging, and biosensors. with Fe 3 o 4 Different, monodisperse FePt nanoparticles have excellent electrocatalytic activity and stability, and FePt nanoparticles with magnetically ordered structure also have excellent hard magnetism, which can be used in fuel cell catalysis, ultra-high density magnetic storage, high-performance permanent magnets, etc It has great application prospects. Therefore, the successful preparation of monodisperse FePt / Fe 3 o 4 Mixed nanoparticles will have these excellent properties at the same time, thus greatly broadening the applicat...

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 Patents(China)
IPC IPC(8): B22F9/24B22F1/00B82Y40/00
CPCB82Y40/00B22F9/24B22F1/0545
Inventor 王凯吴纯刘治鲁牛良杨淦婷李丹王强
Owner NORTHEASTERN UNIV LIAONING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com