Unlock instant, AI-driven research and patent intelligence for your innovation.

A magnetic microsphere adsorbent with core-shell structure and its preparation method and application

A magnetic microsphere, core-shell structure technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve problems such as difficult recovery, low adsorption performance, and reduced adsorption performance

Active Publication Date: 2022-06-28
沈阳华纳科技有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flaky brick-concrete structure makes the material have good tensile strength and elongation at break, but a large number of adsorption active sites are used to build layered structures, resulting in a decrease in its adsorption performance.
Therefore, there is an urgent need for a microsphere adsorbent that can solve the problems of low adsorption performance and difficult recovery when it is applied to wastewater treatment

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 magnetic microsphere adsorbent with core-shell structure and its preparation method and application
  • A magnetic microsphere adsorbent with core-shell structure and its preparation method and application
  • A magnetic microsphere adsorbent with core-shell structure and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0038] The present invention also provides a method for preparing the magnetic microsphere adsorbent of the core-shell structure, comprising the following steps:

[0039] (1) mixing the magnetic nanoparticles with the carbon source solution, and performing a hydrothermal reaction to obtain magnetic carbon spheres;

[0040](2) mixing the magnetic carbon spheres obtained in the step (1) with the chitosan solution, and performing layer-by-layer assembly to obtain magnetic spherical chitosan microspheres;

[0041] (3) Mixing the magnetic spherical chitosan microspheres obtained in the step (2) with the montmorillonite nanosheet solution, and performing a cross-linking reaction to obtain a magnetic microsphere adsorbent with a core-shell structure.

[0042] In the present invention, the magnetic nano-particles are mixed with the carbon source solution, and the hydrothermal reaction is carried out to obtain the magnetic carbon ball.

[0043] In the present invention, the carbon sou...

Embodiment 1

[0074] (1) Add 5g of sucrose to 65mL of deionized water to prepare a sucrose solution with a concentration of 0.2mol / mL, add 0.5g of Fe 3 O 4 The nanoparticles form a homogeneous phase, and the magnetic carbon spheres can be prepared after hydrothermal reaction at 180°C for 5 hours. Among them, Fe 3 O 4 The mass ratio of nanoparticles to sucrose in the sucrose solution was 0.1:1.

[0075] (2) First prepare a glacial acetic acid solution with a concentration of 8 g / L chitosan, and slowly inject the magnetic carbon spheres into the chitosan solution according to the mass ratio of the magnetic carbon spheres to the chitosan in the chitosan solution of 1:1. magnetic stirring at 400 rpm, stirring at 25° C. for 30 min, and performing layer-by-layer assembly to obtain magnetic spherical chitosan microspheres.

[0076] (3) 8wt% montmorillonite nanosheet solution was prepared first, and the mass ratio of magnetic spherical chitosan microspheres to montmorillonite nanosheets in the ...

Embodiment 2

[0083] (1) Add 5g of sucrose to 65mL of deionized water to prepare a sucrose solution with a concentration of 0.2mol / mL, add 0.5g of Fe 3 O 4 The nanoparticles form a homogeneous phase, and the magnetic carbon spheres can be prepared after hydrothermal reaction at 180°C for 5 hours. Among them, Fe 3 O 4 The mass ratio of nanoparticles to sucrose in the sucrose solution was 0.1:1.

[0084] (2) First prepare a glacial acetic acid solution with a concentration of 10 g / L chitosan, and slowly inject the magnetic carbon spheres into the chitosan solution according to the mass ratio of the magnetic carbon spheres to the chitosan in the chitosan solution of 1:1. magnetic stirring at 400 rpm, stirring at 25° C. for 30 min, and performing layer-by-layer assembly to obtain magnetic spherical chitosan microspheres.

[0085] (3) First prepare a 20wt% montmorillonite nanosheet solution, with the mass ratio of the magnetic spherical chitosan microspheres and the montmorillonite nanosheet...

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
thicknessaaaaaaaaaa
particle diameteraaaaaaaaaa
concentrationaaaaaaaaaa
Login to View More

Abstract

The invention provides a magnetic microsphere adsorbent with a core-shell structure and a preparation method and application thereof, which belong to the technical field of composite materials. The present invention uses magnetic carbon spheres as the core of the magnetic microsphere adsorbent with a core-shell structure, which can make the adsorbent easy to recycle; the present invention forms magnetic carbon spheres by wrapping carbon on the surface of magnetic nanoparticles, because carbon has stable electronegativity , which is conducive to the subsequent assembly of chitosan on the surface of the carbon layer layer by layer to provide a cross-linked framework; using montmorillonite nanosheets as the shell can fully expose the adsorption active points of the montmorillonite nanosheets, thereby improving the adsorption of the adsorbent performance. The data of the examples show that the magnetic microsphere adsorbent with core-shell structure provided by the present invention has a high simultaneous removal rate of methylene blue and lead ions, and the removal rate has reached 90% within 40 minutes.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a magnetic microsphere adsorbent with a core-shell structure and a preparation method and application thereof. Background technique [0002] Heavy metals and organic pollutants are ubiquitous in the wastewater discharged from the production process of dyes and pharmaceuticals, and the compound pollution is highly toxic. If it can be removed simultaneously, the project investment cost and wastewater treatment efficiency can be effectively reduced, and the operating cost can be reduced. Adsorption technology is considered to be the first choice for simultaneous treatment of heavy metals and organic pollutants due to its low cost, convenient operation and efficient removal of pollutants. Its core technology is the research and development of new functional adsorption materials. [0003] Montmorillonite (derived from the clay mineral bentonite) has a high ion exchange ca...

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): B01J20/28B01J20/24B01J20/30C02F1/28C02F101/20
CPCB01J20/28009B01J20/28021B01J20/24B01J20/16B01J20/06B01J20/02B01J20/28007C02F1/281C02F1/286C02F2101/20
Inventor 栾敬德赵晨翟倩白宇
Owner 沈阳华纳科技有限公司