Method for preparing porous magnetic nanoclusters through etching

A magnetic nano and crystal cluster technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of inability to prepare magnetic clusters, inability to carry out hierarchical modification, single, etc., and achieve cheap raw materials, The effect of easy surface and simple method

Inactive Publication Date: 2014-05-21
FUDAN UNIV
View PDF2 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the magnetic nanoparticles obtained by these methods have gradually improved their colloidal stability and specific surface area, a single method still cannot prepare magnetic clusters with high specific surface area.
And the magnetic clusters that have not been post-processed cannot be graded because the internal and external differences do not exist.

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
  • Method for preparing porous magnetic nanoclusters through etching
  • Method for preparing porous magnetic nanoclusters through etching
  • Method for preparing porous magnetic nanoclusters through etching

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: specific surface area is 240m 2 / g porous magnetic nanoclusters were prepared.

[0026] Disperse 0.5 g of the prepared magnetic clusters in 500 mL of DMF, add 1 mL of methyl thioglycolate, 10 mL of hydrazine hydrate, and 0.3 g of azobisisobutyronitrile, under the protection of nitrogen atmosphere, at 80 °C Under mechanical stirring for 0.5 h. The product magnetic clusters were separated by magnetic separation, washed with absolute ethanol to remove unreacted reactants, and dried. Porous magnetic nanocrystal clusters are obtained by etching. The specific surface area of ​​the porous magnetic nanocrystal cluster is 240m 2 / g.

Embodiment 2

[0027] Embodiment 2: specific surface area is 463m 2 / g porous magnetic nanoclusters were prepared.

[0028] Disperse 0.5 g of the prepared magnetic clusters in 500 mL of DMF, add 1 mL of methyl thioglycolate, 10 mL of hydrazine hydrate, and 0.3 g of azobisisobutyronitrile, under the protection of nitrogen atmosphere, at 80 °C Under mechanical stirring for 0.75 h. The product magnetic clusters were separated by magnetic separation, washed with absolute ethanol to remove unreacted reactants, and dried. Porous magnetic nanocrystal clusters are obtained by etching. The specific surface area of ​​the porous magnetic nanocrystal cluster is 463m 2 / g.

Embodiment 3

[0029] Embodiment 3: specific surface area is 684m 2 / g porous magnetic nanoclusters were prepared.

[0030] Disperse 0.5 g of the prepared magnetic clusters in 500 mL of DMF, add 1 mL of methyl thioglycolate, 10 mL of hydrazine hydrate, and 0.3 g of azobisisobutyronitrile, under the protection of nitrogen atmosphere, at 80 °C Under mechanical stirring for 1.0 h. The product magnetic clusters were separated by magnetic separation, washed with absolute ethanol to remove unreacted reactants, and dried. Porous magnetic nanocrystal clusters are obtained by etching. The specific surface area of ​​the porous magnetic nanocrystal cluster is 684m 2 / g.

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
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of inorganic materials and in particular relates to a method for preparing porous magnetic nanoclusters through etching. According to the method, magnetic colloid nanoclusters subjected to surface glycosylation are taken as a precursor, and porous magnetic nanoclusters with high specific surface area are prepared through a one-step etching method. The method comprises the following steps: by taking agarose as a stabilizer, preparing to obtain the magnetic colloid nanoclusters (called magnetic clusters for short) through a solvothermal method; reacting the prepared magnetic clusters, hydrazine, mercaptoacetate molecules and radical initiators, uniformly etching the original magnetic clusters, and obtaining the porous magnetic nanoclusters with high specific surface area. According to the method, the specific surface area of the porous magnetic nanoclusters can be controlled by controlling the reaction conditions. The method is simple in operation and mild in reaction conditions and has high application prospects, and the porous magnetic nanoclusters which are regular in structures and are acid biodegradable can be prepared.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic materials, and in particular relates to a method for preparing porous magnetic nano crystal clusters by etching. Background technique [0002] In recent years, magnetic nanoparticles have been widely used in biomedicine due to their unique magnetic physical properties, which can displace under the action of an external magnetic field, and can produce unique magneto-thermal physical phenomena under the action of an alternating magnetic field. The preparation of functionalized magnetic particles, increasing its specific surface area, can improve the reactivity, and further expand its application in this area, such as biological diagnosis, enrichment of active biomolecules, immobilized enzyme catalysis, etc. [0003] At present, there are general chemical precipitation methods for preparing magnetic nanoparticles: using ferric iron and ferrous iron in proportion as the iron source, w...

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 Applications(China)
IPC IPC(8): C01G49/06B82Y30/00B82Y40/00
Inventor 李典汪长春
Owner FUDAN 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