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Preparation method of magneitc polymer microspheres for in situ immobilization of noble metal catalyst

A precious metal catalyst, polymer technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc., can solve the problem of low magnetic content, magnetic polymer microsphere size Problems such as wide distribution to achieve the effect of not easy to drain

Inactive Publication Date: 2012-12-12
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the particle size distribution of magnetic polymer microspheres prepared in the existing preparation method is wide and the magnetic content is low

Method used

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  • Preparation method of magneitc polymer microspheres for in situ immobilization of noble metal catalyst
  • Preparation method of magneitc polymer microspheres for in situ immobilization of noble metal catalyst
  • Preparation method of magneitc polymer microspheres for in situ immobilization of noble metal catalyst

Examples

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Effect test

Embodiment example 1

[0027] 1) Preparation of hydrophilic Fe by solvothermal method 3 o 4 nanoparticles

[0028] 4mmol FeCl 3 ·6H 2 O is completely dissolved in 40ml of ethylene glycol under the action of magnetic stirring, and 0.06 mmol of modifier polyacrylic acid is added under strong magnetic stirring. After it is completely dissolved, 0.11 mol of anhydrous sodium acetate is added to form a khaki precursor solution , and transferred to a 50ml reactor, and reacted at 200°C for 12 hours. The product was washed several times with deionized water and ethanol, and dried under vacuum for 6 hours.

[0029] 2) In situ radical polymerization to prepare Fe 3 o 4 P4VP nanocomposite microspheres

[0030] 0.1g hydrophilic Fe 3 o 4 Ultrasonic dispersion in an aqueous solution containing 0.02mmol of dispersant, and transferred to a 250ml four-necked bottle, after the nitrogen gas was removed to remove the air, the emulsion formed by adding 2.325mmol 4-VP was absorbed by hydrogen bonding under nitrog...

Embodiment example 2

[0034] 1) Preparation of hydrophilic Fe by solvothermal method 3 o 4 nanoparticles

[0035] 4mmol FeCl 3 ·6H 2 O is completely dissolved in 40ml of ethylene glycol under the action of magnetic stirring, and 0.04 mmol of modifier polyacrylic acid is added under strong magnetic stirring. After it is completely dissolved, 0.066 mol of anhydrous sodium acetate is added to form a khaki precursor solution , and transferred to a 50ml reactor, and reacted at 200°C for 12 hours. The product was washed several times with deionized water and ethanol, and dried under vacuum for 6 hours.

[0036] 2) In situ radical polymerization to prepare Fe 3 o 4 P4VP-co-PDVB nanocomposite microspheres

[0037] 0.1g hydrophilic Fe 3 o 4 Ultrasonic dispersion in an aqueous solution containing 0.02mmol dispersant, and transferred to a 250ml four-necked bottle, after purging the air with nitrogen, add the emulsion formed by 4.65 mmol 4-VP and 3.5 mmol DVB, and absorb it through hydrogen bonding un...

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Abstract

The invention relates to a preparation method of magneitc polymer microspheres for in situ immobilization of a noble metal catalyst, and belongs to the field of polymer material and nanocomposite. The preparation method comprises the following steps of: firstly preparing hydrophilic magnetic Fe3O4 nanoparticles with high magnetic responsibility by the utilization of a solvothermal method; forming a hydrogen bond by the hydrophilic magnetic Fe3O4 nanoparticles with a hydrophilic functional monomer through adsorption; and preparing the monodispersed magnetic polymer microspheres with high magnetic responsibility and with functional groups on the surface by an in situ free radical polymerization method. By electrostatic adsorption between the functional groups on the surface and a noble metal salt solution and in situ loading of the noble metal nanoparticles for degradation of pollutants, the magneitc polymer microspheres show a stable and efficient catalytic activity.

Description

[0001] technical field [0002] The invention belongs to the field of polymer materials and nanocomposite materials, and particularly relates to a preparation method of magnetic polymer microspheres used for in-situ immobilization of noble metal catalysts. Background technique [0003] The research on magnetic polymer microspheres can be traced back to the 1970s. At present, magnetic polymer microspheres are widely used in the fields of biology and catalysis because of their simple and convenient separation methods. The so-called magnetic polymer microspheres refer to the combination of inorganic magnetic substances and polymers through appropriate preparation methods to form composite microspheres with certain structures and functions. The magnetic properties of magnetic polymer microspheres ensure their rapid separation under the action of an external magnetic field, while the functional groups on the surface of the organic shell can interact with biologically active subst...

Claims

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Application Information

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IPC IPC(8): B01J31/28B01J31/26B01J35/08C08F26/06C08F2/44C08K3/22
Inventor 王戈王倩郭万春杨穆禹杰陈晨日
Owner UNIV OF SCI & TECH BEIJING
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