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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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the particle size distribution of mag

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

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Example Embodiment

[0026] Implementation case 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, add 0.06mmol of modifier polyacrylic acid under strong magnetic stirring, after it is completely dissolved, add 0.11mol of anhydrous sodium acetate to form an earthy yellow precursor solution , And transferred to a 50ml reactor, reacted at 200°C for 12 hours. After washing the product with deionized water and ethanol several times, it was vacuum dried for 6 hours.

[0029] 2) Preparation of Fe by in-situ radical polymerization 3 O 4 P4VP nanocomposite microspheres

[0030] 0.1g hydrophilic Fe 3 O 4 Disperse ultrasonically in an aqueous solution of 0.02mmol dispersant, and transfer it to a 250ml four-neck flask. After blowing nitrogen to remove air, add 2.325mmol 4-VP to form an emulsion. After 12 hours of adsorption by hydrogen bonding under nitrogen, ...

Example Embodiment

[0033] Implementation case 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. Add 0.04mmol of modifier polyacrylic acid under strong magnetic stirring. After it is completely dissolved, add 0.066mol of anhydrous sodium acetate to form an earthy yellow precursor solution , And transferred to a 50ml reactor, reacted at 200°C for 12 hours. After washing the product with deionized water and ethanol several times, it was vacuum dried for 6 hours.

[0036] 2) Preparation of Fe by in-situ radical polymerization 3 O 4 P4VP-co-PDVB nano composite microspheres

[0037] 0.1g hydrophilic Fe 3 O 4 Disperse ultrasonically in an aqueous solution of 0.02mmol dispersant, and transfer to a 250ml four-necked flask. After blowing nitrogen to remove the air, add 4.65mmol 4-VP and 3.5mmol DVB to form an emulsion, and absorb by hydrogen bonding under ...

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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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