Preparation method of double-shell core-shell structured composite nanoparticle with with cavity

A technology of nanocomposite particles and core-shell structure, which is applied in the field of advanced nanocomposite particles to reduce costs and increase adsorption capacity

Inactive Publication Date: 2014-10-08
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Combining Fe3O4, polymer and anatase together to prepare multilayer core-shell structure composite particles with cavities, there are still relatively few reports on this aspect

Method used

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  • Preparation method of double-shell core-shell structured composite nanoparticle with with cavity
  • Preparation method of double-shell core-shell structured composite nanoparticle with with cavity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Add 1g of ferric chloride hexahydrate, 0.1g of sodium citrate, and 1g of sodium acetate into a mixture of 50ml of ethylene glycol and 30ml of diethylene glycol, stir at room temperature until dissolved, and then transfer the solution to polytetrafluoroethylene In the reaction kettle, react at a temperature of 180° C. for 10 hours to obtain a black product. The black product was washed three times with deionized water and absolute ethanol respectively, and dried at 30° C. for 10 hours to finally obtain iron ferric oxide nanoparticles;

[0024] (2) Ultrasonically disperse 0.04g of ferric oxide nanoparticles obtained in step (1), 40ml of absolute ethanol, 5ml of water, and 1ml of ammonia water in a three-necked flask, stir at room temperature for 10 minutes, and then add 0.2ml of ethyl orthosilicate Add the ester dropwise into the flask, continue stirring for 6 hours, collect the product after the reaction is fully completed, wash the product three times with absolute ...

Embodiment 2

[0029] (1) Add 1g of ferric chloride hexahydrate, 0.5g of sodium citrate, and 3g of sodium acetate into a mixture of 60ml of ethylene glycol and 20ml of diethylene glycol, stir at room temperature until dissolved, then transfer the solution to an autoclave, React at 200°C for 10 hours to obtain a black product. The black product was washed three times with deionized water and absolute ethanol respectively, and dried at 30° C. for 10 hours to finally obtain iron ferric oxide nanoparticles;

[0030] (2) Ultrasonically disperse 0.04g of iron ferric oxide nanoparticles obtained in step (1), 60ml of absolute ethanol, 10ml of water, and 2ml of ammonia water in a three-necked flask, stir at room temperature for 10 minutes, and then add 0.5ml of methyl orthosilicate Add the ester dropwise into the flask, continue stirring for 10 hours, collect the product after the reaction is fully completed, wash the product three times with absolute ethanol and deionized water, and dry at 40°C for...

Embodiment 3

[0035] (1) Add 1g of ferric chloride hexahydrate, 0.1g of sodium citrate, and 1g of sodium acetate into a mixture of 50ml of ethylene glycol and 30ml of diethylene glycol, stir at room temperature until dissolved, then transfer the solution to an autoclave, React at 220°C for 10 hours to obtain a black product. The black product was washed three times with deionized water and absolute ethanol respectively, and dried at 30° C. for 10 hours to finally obtain iron ferric oxide nanoparticles;

[0036] (2) Ultrasonically disperse 0.04g of iron ferric oxide nanoparticles obtained in step (1), 100ml of absolute ethanol, 8ml of water, and 2.8ml of ammonia water in a three-necked flask, stir at room temperature for 10 minutes, and then add 1ml of acrylic orthosilicate Add the ester dropwise into the flask, continue stirring for 12 hours, collect the product after the reaction is fully completed, wash the product three times with absolute ethanol and deionized water, and dry at 40°C for...

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Abstract

The invention relates to a preparation method of a double-shell core-shell structured composite nanoparticle with a cavity, belonging to the technical field of advanced composite nanoparticles. The preparation method comprises the steps of coating a layer of silicon dioxide on an outer layer of a ferroferric oxide nanoparticle, and reacting after modifying by using a silane coupling agent to obtain a polymer-coated composite particle; then, sequentially coating silicon dioxide and titanium dioxide on the outer layer of the composite particle; finally, removing the two silicon dioxide coating layers to obtain the double-shell core-shell structured composite nanoparticle with the cavity. The composite nanoparticle has a core made of the ferroferric oxide nanoparticle, a middle shell made of polymethylacrylic acid and an outmost-layer shell made of titanium dioxide, wherein the cavity exists among the middle shell, the core and the outmost-layer shell. The material obtained by the invention is novel in structure and capable of adsorbing heavy metal ions and catalytically degrading organic pollutants under the excitation of ultraviolet rays; in addition, the composite nanoparticle can be separated and recovered under the action of an external magnetic field.

Description

technical field [0001] The invention belongs to the technical field of advanced nanocomposite particles, and in particular relates to a method for preparing ferric oxide / polymethacrylic acid / titanium dioxide nanocomposite particles with a double-shell core-shell structure with a cavity. Background technique [0002] Combining inorganic nanomaterials with organic polymer materials can prepare new composite materials with dual properties of inorganic nanoparticles and polymers. In addition, the existence of the cavity makes the composite material have the characteristics of low density and high specific surface area, which makes it possible for the composite material to be used in drug delivery, biomedicine, catalysis and other fields. Ferroferric oxide nanoparticles have the characteristics of non-toxicity, good biocompatibility, unique superparamagnetism, and easy collection under an external magnetic field. Combining polymers with Fe3O4 nanoparticles to construct core-shel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F220/14C08F212/36C08K3/22C08J9/26
Inventor 刘伟良赵丹柏冲周广盖任慢慢
Owner QILU UNIV OF TECH
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