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a magnetic znfe 2 o 4 /Graphene nanocomposite photocatalyst and its preparation method and application

A nano-composite, photocatalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of non-recyclability and low utilization of visible light, and achieve The effect of low equipment requirements and simple synthesis process

Active Publication Date: 2022-01-25
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] For existing TiO 2 The photocatalyst has the disadvantages of low utilization rate of visible light and non-recyclability. The present invention provides a magnetic ZnFe with low preparation cost and good photocatalytic performance. 2 o 4 / Graphene nanocomposite photocatalyst and preparation method thereof

Method used

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  • a magnetic znfe <sub>2</sub> o <sub>4</sub> /Graphene nanocomposite photocatalyst and its preparation method and application
  • a magnetic znfe <sub>2</sub> o <sub>4</sub> /Graphene nanocomposite photocatalyst and its preparation method and application
  • a magnetic znfe <sub>2</sub> o <sub>4</sub> /Graphene nanocomposite photocatalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Weigh 60 mg of graphene oxide and add it to 60 mL of diethylene glycol, and ultrasonically stir for 30 min to obtain a uniform dispersion;

[0043] (2) Add 2mL polyethylene glycol to the graphene oxide dispersion to obtain mixed solution A;

[0044] (3) Weigh 0.808gFe(NO 3 ) 3 and 0.297gZn(NO 3 ) 2 Dissolve in 20mL diethylene glycol, fully dissolve to obtain a uniform metal salt solution B;

[0045] (4) Metal salt solution B is slowly added dropwise in graphene oxide mixed solution A, fully stirred for 30min, and mixed solution C is obtained;

[0046] (5) Weigh 3.5g of sodium acetate and 0.58g of sodium lauryl sulfate, dissolve them in 10mL of deionized water, and add them dropwise to the above mixed solution C, and transfer the mixed solution to an autoclave at 180°C for 10 hours;

[0047] (6) After centrifugation, washing and vacuum drying, the product was annealed at 200°C for 2 hours under a nitrogen atmosphere to obtain magnetic ZnFe 2 o 4 / Graphene nano...

Embodiment 2

[0051] (1) Weigh 53.5 mg of graphene oxide and disperse it in 40 mL of diethylene glycol, and ultrasonically stir for 20 min to obtain a uniform dispersion;

[0052] (2) Add 2mL polyethylene glycol to the graphene oxide dispersion to obtain mixed solution A;

[0053] (3) Weigh 1.616g Fe(NO 3 ) 3 9H 2 O with 0.594g Zn(NO 3 ) 2 ·6H 2 O was dissolved in 20mL diethylene glycol to obtain a uniform metal salt solution B;

[0054] (4) The metal salt solution is slowly added dropwise to the graphene oxide mixed solution A obtained in step (2), and fully stirred for 60 min to obtain a mixed solution C;

[0055] (5) Weigh 6.56g of sodium acetate and 0.3456g of sodium lauryl sulfate, dissolve them in 15mL of deionized water, add them dropwise to the above mixed solution C, transfer the mixed solution to an autoclave, and react at 200°C for 8 hours;

[0056] (6) After centrifugation, washing and vacuum drying, the product is annealed at 500°C for 0.5h under nitrogen atmosphere to o...

Embodiment 3

[0058] (1) Weigh 60 mg of graphene oxide and disperse it in 20 mL of diethylene glycol, and ultrasonically stir for 60 min to obtain a uniform dispersion;

[0059] (2) Add 1.33mL polyethylene glycol to the graphene oxide dispersion to obtain mixed solution A;

[0060] (3) Weigh 0.604gFe(NO 3 ) 3 9H 2 O and 0.222gZn(NO 3 ) 2 ·6H 2 O was dissolved in 20mL diethylene glycol to obtain a uniform metal salt solution B;

[0061] (4) The metal salt solution is slowly added dropwise to the graphene oxide mixed solution A obtained in step (2), and fully stirred for 20 min to obtain a mixed solution C;

[0062] (5) Weigh 6.12g of sodium acetate and 0.538g of sodium lauryl sulfate, dissolve them in 12.24mL of deionized water, and add them dropwise to the above mixed solution C, transfer the mixed solution to an autoclave, and react at 130°C for 72h ;

[0063] (6) After centrifugation, washing and vacuum drying, the product is annealed at 250°C for 3 hours under nitrogen atmosphere...

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Abstract

The invention discloses a magnetic ZnFe 2 o 4 / Graphene nanocomposite photocatalyst and its preparation method and application. In the present invention, diethylene glycol is used as a solvent, polyethylene glycol is used as a shape control agent, sodium lauryl sulfate is used as a dispersant, and sodium acetate is used to hydrolyze to provide alkaline conditions, so that zinc ferrite is evenly distributed on the surface of graphene. At the same time, zinc ferrite crystals can also prevent the disordered stacking and agglomeration between layered graphene, thereby increasing the surface area of ​​the composite. Compared to single ZnFe 2 o 4 Photocatalyst, this composite material has a high specific surface area and excellent electronic conductivity; it can not only provide sufficient reactive sites for photocatalytic reactions, but also promote the migration and separation of photogenerated carriers, making ZnFe 2 o 4 / graphene nanocomposite photocatalyst exhibits excellent visible light photocatalytic ability.

Description

technical field [0001] The invention belongs to the field of preparation of nanocomposite materials, in particular to a magnetic ZnFe 2 o 4 / Graphene nanocomposite photocatalyst and its preparation method and application. Background technique [0002] With the increase of population and the development of industry, the problem of environmental pollution has become increasingly prominent. With the continuous development of the textile industry, printing and dyeing wastewater has become an environmental pollution problem that cannot be ignored, and has attracted more and more attention. [0003] Organic dyes are the largest class of pollutants discharged into the environment by textile, dyeing and other industrial processes, causing great harm to the environment and human health. Therefore, it is imperative to effectively remove these harmful pollutants from water bodies. Traditional physical and chemical methods are difficult to completely remove or degrade organic pollut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/80C02F1/30C02F101/30
Inventor 孙青吴坤盛嘉伟张俭马俊凯
Owner ZHEJIANG UNIV OF TECH
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