Preparation method of magnetic core-shell type nanoparticle surface uranyl molecularly imprinted polymer

A technology for imprinting polymers and nanoparticles, which can be used in the fields of alkali metal compounds, radioactive pollutants, chemical instruments and methods, etc. It can solve the problems of uneven distribution of MIP imprinting sites, difficult elution of template molecules, and low mass transfer efficiency. , achieve good selectivity, facilitate magnetic separation, and improve extraction efficiency

Inactive Publication Date: 2017-05-31
NANHUA UNIV
View PDF11 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

MIPs prepared by traditional methods generally have defects such as uneven distribution of imprinting

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 magnetic core-shell type nanoparticle surface uranyl molecularly imprinted polymer
  • Preparation method of magnetic core-shell type nanoparticle surface uranyl molecularly imprinted polymer
  • Preparation method of magnetic core-shell type nanoparticle surface uranyl molecularly imprinted polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] This example is intended to illustrate the present invention " magnetic Fe 3 o 4 Core-SiO 2 Feasibility of preparing uranyl molecularly imprinted polymers on the surface of shell nanoparticles,

[0024] 1. Preparation of magnetic nanoparticles:

[0025] Take 5mmol sodium citrate, 0.2mol NaNO 3 And 20mmol NaOH, dissolved in 100mL distilled water, placed in a boiling water bath to keep the temperature, quickly add 2mol L -1 5 mL of ferrous sulfate solution, the color of the solution turned black rapidly, and the reaction was stirred for 1.5 hours. Take it out and cool it, separate the solid product with a magnet, wash it with distilled water until the clear liquid is neutral, and dry it in a vacuum oven at 50°C to obtain a magnetic Fe 3 o 4 Nanoparticles.

[0026] 2.Fe 3 o 4 @SiO 2 preparation:

[0027] Weigh the 0.5g Fe prepared above 3 o 4 The magnetic nanoparticles were dispersed in a flask filled with 80mL ethanol and 20mL distilled water, and ultrasonica...

Embodiment 2

[0033] In order to remove the template molecule uranium, the prepared U-MIP was eluted with 10ml 0.5mol / L HCl for 1.5h, and the magnetic Fe was detected by UV / Vis spectrophotometer 3 o 4 Core-SiO 2 Whether the uranyl molecularly imprinted polymer template molecules on the surface of shell nanoparticles have been completely cleared. Then wash 2-3 times with ultrapure water, and the obtained magnetic Fe 3 o 4 Core-SiO 2 The uranyl molecularly imprinted polymer on the surface of the shell nanoparticles was dried in a drying oven at 60°C. 10 mg of dried U-MIP (U-NIP) was weighed and placed in 10 ml of uranyl solutions of different concentrations. The mixture was kept stirring at room temperature for 90 min, and the UNIP was separated with a magnet, and the concentration of uranium in the supernatant was measured with a UV / Vis spectrophotometer. By the formula Q=[V×(C 0 –C e )] / m to calculate the equilibrium adsorption capacity of U-MIP (or U-NIP) (Q / μmolg -1 ). C 0 and ...

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 relates to a preparation method of a magnetic core-shell type surface uranyl molecularly imprinted polymer nanoparticle. The preparation method comprises the following steps of firstly, using a precipitation method to prepare magnetic Fe3O4 nanoparticles; polymerizing an SO2 outer shell on the surface of a magnetic particle, so as to obtain an Fe3O4 core and SO2 shell nanoparticle; using UO22+-Salophen as a template molecule, and adopting a sol-gel method to prepare the uranyl molecularly imprinted polymer particle product. The uranyl molecularly imprinted polymer particle product has the advantages that the water dispersion property is good, and the magnetic response is strong; the diameter of the nanoparticles is 30 to 108mm, and the superparamagnetism is realized; the good identification, adsorption, separation, enriching and purification functions on uranium in complicated samples are realized; the separation efficiency is high, the selectivity is good, and the operation is simple and convenient; the application prospect is broad in the fields of detection of uranium in water, treatment of uranium-polluted water, extraction of uranium in seawater, and the like.

Description

technical field [0001] The invention belongs to the field of nanocomposite materials, in particular to a new magnetic Fe 3 o 4 Core-SiO 2 Preparation of uranyl molecularly imprinted polymers on the surface of shell nanoparticles (i.e., magnetic Fe 3 o 4 Core-coated SiO 2 Uranyl molecularly imprinted polymers on the outer layer of nanoparticles). Background technique [0002] Molecular imprinting technology is a rapidly developing new separation technology, which has a mechanism similar to that of immunological "antigen-antibody". Due to the advantages of molecularly imprinted polymers (molecularly imprinted polymers, MIPs), such as high physical / chemical stability, good selectivity and affinity for the target to be separated, simple preparation process, and strong universality, MIP has been It has developed rapidly in many fields such as solid phase extraction, biomimetic catalysis, and identification sensing, and is widely used in environmental pollution analysis and ...

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): C08G77/26C08G83/00C08J9/26B01J20/26B01J20/28B01J20/30C02F1/28
CPCC08G77/26B01J20/268B01J20/28009C02F1/288C02F2101/006C08G83/001C08J9/26C08J2201/0424C08J2383/08
Inventor 李贵荣李节康龙鼎新唐律
Owner NANHUA 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