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

Mn element and Zn element-doped super-paramagnetic ferrite nanoparticles and preparation method thereof

A superparamagnetic and ferrite technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of large particle size, difficult to precisely control, and high equipment and operation requirements. The effect of high crystallinity, uniform size and high saturation magnetization

Active Publication Date: 2013-10-02
SICHUAN UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This preparation method is carried out under high temperature and high pressure, which requires high equipment and operation, and the process of adjusting pH with ammonia water is not easy to accurately control
[0004] The Chinese patent application with the application number 20081003866.2 discloses a method for preparing manganese zinc ferrite magnetic nano-microspheres. The preparation method is to use soluble iron salts, manganese salts and zinc salts as raw materials by alcohol thermal method, and ethylene glycol As a solvent, anhydrous sodium acetate as a basic additive, polyethylene glycol and polyvinylpyrrolidone as a dispersant, the nano-magnetic spheres with relatively pure crystal phase and high magnetic saturation strength were prepared, but the particle size distribution was wide and the particle size also bigger

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
  • Mn element and Zn element-doped super-paramagnetic ferrite nanoparticles and preparation method thereof
  • Mn element and Zn element-doped super-paramagnetic ferrite nanoparticles and preparation method thereof
  • Mn element and Zn element-doped super-paramagnetic ferrite nanoparticles and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The processing steps of the present embodiment are as follows:

[0031] (1) Synthesis of magnetic nanoparticles

[0032] Two precursors of iron acetylacetonate (1 mmol) and manganese acetylacetonate (0.4 mmol) were mixed with 5 mmol of 1,2-hexadecanol, and 3 mmol of oleic acid and 3 mmol of oleylamine were added as surfactants to 25 ml of benzyl ether was used as a solvent, heated to 200°C at a speed of 3°C / min and kept for 2h, and then heated to reflux temperature at the same heating rate, and kept at about 280°C for 1h.

[0033] (2) Post-processing of magnetic nanoparticles

[0034]Cool to room temperature, precipitate in 250 ml ethanol, decant the supernatant, and centrifuge at low speed (3500 rpm, 5 min). Add the obtained black precipitate to oleic acid (0.15 mmol) and oleylamine (0.15 mmol) to disperse in n-hexane and centrifuge at high speed (8000 rpm, 10 min), then precipitate the solution in ethanol again, then centrifuge at low speed to remove excess solvent,...

Embodiment 2

[0037] The processing steps of the present embodiment are as follows:

[0038] (1) Synthesis of magnetic nanoparticles

[0039] Two precursors of iron acetylacetonate (1 mmol) and manganese acetylacetonate (1.25 mmol) were mixed with 5 mmol of 1,2-hexadecanol, and 3 mmol of oleic acid and 3 mmol of oleylamine were added as surfactants to 25 ml of benzyl ether was used as a solvent, heated to 200°C at a speed of 3°C / min and kept for 2h, and then heated to reflux temperature at the same heating rate, and kept at about 280°C for 1h.

[0040] (2) Post-processing of magnetic nanoparticles

[0041] Cool to room temperature, precipitate in 250 ml ethanol, decant the supernatant, and centrifuge at low speed (3500 rpm, 5 min). Add the obtained black precipitate to oleic acid (0.15 mmol) and oleylamine (0.15 mmol) to disperse in n-hexane and centrifuge at high speed (8000 rpm, 10 min), then precipitate the solution in ethanol again, then centrifuge at low speed to remove excess solven...

Embodiment 3

[0044] The processing steps of the present embodiment are as follows:

[0045] (1) Synthesis of magnetic nanoparticles

[0046] Three precursors of iron acetylacetonate (0.75 mmol), manganese acetylacetonate (0.35 mmol) and zinc acetylacetonate (0.15 mmol) were mixed with 5 mmol 1,2-hexadecanol, 3 mmol oleic acid, 3 mmol Oleylamine was used as a surfactant, and 25 ml benzyl ether was used as a solvent, heated to 200°C at a rate of 3°C / min and kept for 2 hours, and then heated to reflux temperature at the same heating rate, and kept at about 280°C for 1 hour.

[0047] (2) Post-processing of magnetic nanoparticles

[0048] Cool to room temperature, precipitate in 250 ml ethanol, decant the supernatant, and centrifuge at low speed (3500 rpm, 5 min). Add the obtained black precipitate to oleic acid (0.15 mmol) and oleylamine (0.15 mmol) to disperse in n-hexane and centrifuge at high speed (8000 rpm, 10 min), then precipitate the solution in ethanol again, then centrifuge at low ...

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

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses Mn element and Zn element-doped super-paramagnetic ferrite nanoparticles and a preparation method thereof. Manganese element is added or manganese element and zinc element are simultaneously added into a face-centered cubic crystal structure of ferriferrous oxide nanoparticles by using a method of decomposing metal precursor compound at a high temperature; the magnetic performance of the prepared super-paramagnetic nanoparticles is improved by changing the doping amount and the distribution of the metal element; and primarily, the saturation magnetization is improved. The preparation method specifically comprises the following steps of: mixing acetylacetones of Fe and Mn as well as Zn with 1,2-hexadecanol; performing high-temperature decomposition in high-boiling-point solvent by taking oleic acid and oleylamine as surfactants; or performing high-temperature decomposition on composite oleate of Fe, Mn and Zn by taking the oleic acid as the surfactant; heating and preserving heat in stages in argon or nitrogen protective atmosphere to guarantee growth of nanoparticle nuclear; and cooling to room temperature after reaction is finished and settling and centrifuging to finally obtain the super-paramagnetic ferrite nanoparticles which are uniformly dispersed in normal hexane solution.

Description

technical field [0001] The invention belongs to the field of preparation of superparamagnetic nanoparticles, and relates to iron oxide superparamagnetic nanoparticles doped with metal elements Mn and Zn. Background technique [0002] Nanoscale magnetic particles, especially iron oxide magnetic nanoparticles, have attracted great research interest in the field of biomedicine due to their special magnetic orientation, superparamagnetism, and the ability to connect a variety of biochemically active functional groups on the surface. Bioseparation, clinical detection, targeted drug delivery, magnetic resonance imaging and magnetic hyperthermia therapy have broad application prospects. However, since magnetic nanoparticles often need to be surface-coated or grafted and modified during the application process, their saturation magnetization will inevitably be reduced and their magnetic responsiveness will be affected. The preparation of magnetic nanoparticles with high saturation...

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): C04B35/26C04B35/622B82Y30/00
Inventor 吴尧顾忠伟刘克霞蓝芳曾晓波
Owner SICHUAN UNIV
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