Preparation method for magnetic photocatalytic nano composite material

A nanocomposite material and photocatalysis technology, which is applied in the field of preparation of magnetic photocatalytic nanocomposite materials, can solve the problems of large energy gap and limited application, and achieve the effects of recycling, expanding the scope of application and reducing costs

Inactive Publication Date: 2014-09-17
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, titania has a large energy gap (~3.2 eV) and only exhibits photocatalytic activity in the ultraviolet band, which severely limits its application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Add 1g FeCl 3 ·6H 2 O. 0.1g of sodium citrate and 1g of sodium acetate were added to the mixed solution of 50ml of ethylene glycol and 30ml of diethylene glycol, stirred at room temperature until dissolved, then the solution was transferred to an autoclave, and reacted for 10 hours at a temperature of 180°C to obtain 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;

[0021] (2) Add 0.4g of iron ferric oxide nanoparticles obtained above, 0.2g of silver nitrate, and 4g of polyvinylpyrrolidone into 20ml of ethylene glycol solvent, stir and react at 100°C for 8 hours, and collect the product after the reaction is fully completed. The obtained product was washed three times with absolute ethanol and deionized water respectively, and dried at 40° C. for 12 hours to obtain ferric oxide / silver nanoparticles;

[0022] (3) Weigh...

Embodiment 2

[0025] (1) Add 1g FeCl 3 ·6H 2 O. 0.5g of sodium citrate and 3g of sodium acetate were added to a mixture of 60ml of ethylene glycol and 20ml of diethylene glycol, stirred at room temperature until dissolved, then the solution was transferred to an autoclave, and reacted 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;

[0026] (2) Add 0.4g of iron ferric oxide nanoparticles obtained above, 0.2g of silver nitrate, and 4g of polyvinyl alcohol into 20ml of ethylene glycol solvent, and stir and react at 100°C for 8 hours. After the reaction is fully completed, the obtained product Wash with absolute ethanol and deionized water three times respectively, and dry at 40°C for 12 hours to obtain ferric oxide / silver nanoparticles;

[0027] (3) Weigh 0.4g of ferric oxide / silver nanoparticles obtained in ste...

Embodiment 3

[0030] (1) Add 1g FeCl 3 ·6H 2 O. 0.1g sodium citrate and 1g sodium acetate were added to a mixture of 50ml ethylene glycol and 30ml diethylene glycol, stirred at room temperature until dissolved, then the solution was transferred to an autoclave, and reacted 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;

[0031] (2) Add 0.4g of iron ferric oxide nanoparticles obtained above, 0.2g of silver nitrate, and 4g of polyvinylpyrrolidone into 20ml of ethylene glycol solvent, and stir and react at 100°C for 8 hours. After the reaction is fully completed, the obtained product Wash with absolute ethanol and deionized water three times and dry at 40°C for 12 hours to obtain ferric oxide / silver nanoparticles;

[0032] (3) Weigh 0.2g of ferric oxide / silver nanoparticles obtained in step (2), and ultrasonical...

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Abstract

The invention relates to a preparation method for a magnetic photocatalytic nano composite material. The preparation method comprises the following steps of (1) preparing magnetic ferroferric oxide nano particles by a solvothermal method; (2) preparing ferroferric oxide / silver nano composite particles; (3) preparing ferroferric oxide / silver / silicon dioxide nano composite particles by a sol-gel method; and (4) preparing ferroferric oxide / silver / silicon dioxide / titanium dioxide nano composite particles through a sol-gel method, and finally obtaining the magnetic photocatalytic nano composite material through calcination. The magnetic photocatalytic nano composite material prepared by the preparation method disclosed by the invention can realize catalytic degrading of organic pollutants under visible light and can also realize separate recycling under an external magnetic field.

Description

technical field [0001] The invention relates to a preparation method of a magnetic photocatalytic nanocomposite material, and more specifically relates to a preparation method of a magnetic visible light photocatalytic nanocomposite material. Background technique [0002] Semiconductor-based photocatalysts have been widely used in the environmental field due to their excellent properties. Because titanium dioxide is non-toxic, chemically stable and cheap, it is considered as an ideal photocatalytic semiconductor material and has attracted extensive attention from researchers. However, titania has a large energy gap (~3.2 eV) and only exhibits photocatalytic activity in the ultraviolet band, which severely limits its application. The realization of TiO2 photocatalysis under visible light excitation has thus become a research hotspot. Methods including compounding with noble metal particles (such as silver, gold, platinum) have been proposed one after another. Among them, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89
Inventor 刘伟良赵丹周广盖柏冲任慢慢
Owner QILU UNIV OF TECH
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