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Titanium dioxide loaded nickel ferrite and graphene oxide composite thin film, preparation method thereof, and application of titanium dioxide loaded nickel ferrite and graphene oxide composite thin film to wastewater treatment

A technology of titanium dioxide and composite thin films, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, light water/sewage treatment, etc., can solve problems such as low treatment efficiency, secondary pollution, and high energy consumption , to achieve the effects of improving catalytic efficiency, improving utilization efficiency, and large specific surface area

Inactive Publication Date: 2019-05-17
ROCKET FORCE UNIV OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used physical and chemical treatment methods have disadvantages such as high energy consumption, low treatment efficiency, and easy to cause secondary pollution.

Method used

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  • Titanium dioxide loaded nickel ferrite and graphene oxide composite thin film, preparation method thereof, and application of titanium dioxide loaded nickel ferrite and graphene oxide composite thin film to wastewater treatment
  • Titanium dioxide loaded nickel ferrite and graphene oxide composite thin film, preparation method thereof, and application of titanium dioxide loaded nickel ferrite and graphene oxide composite thin film to wastewater treatment
  • Titanium dioxide loaded nickel ferrite and graphene oxide composite thin film, preparation method thereof, and application of titanium dioxide loaded nickel ferrite and graphene oxide composite thin film to wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Mix deionized water, concentrated hydrochloric acid (36.8% by volume), and tetra-n-butyl titanate at a volume ratio of 10:10:0.4, stir and mix well with a magnetic stirrer until the solution is completely clear, and obtain Reaction precursor;

[0032] (2) The fluorine-doped tin dioxide conductive glass was ultrasonically cleaned with acetone, absolute ethanol and deionized water for 15 minutes in sequence, and then soaked in absolute ethanol for use after taking it out;

[0033] (3) Dry the fluorine-doped tin dioxide conductive glass and put it into the polytetrafluoroethylene liner, pour the reaction precursor solution, the conductive surface of the fluorine-doped tin dioxide is facing down, so that the fluorine-doped tin dioxide is completely Soak in the reaction precursor solution, put the liner into the autoclave;

[0034] (4) Put the high-pressure reaction kettle into a 150°C electric heating constant temperature drying oven, and after 5 hours of reaction, tak...

Embodiment 2

[0041] (1) Mix deionized water, concentrated hydrochloric acid (36.8% by volume), and tetra-n-butyl titanate at a volume ratio of 10:10:1, stir and mix well with a magnetic stirrer until the solution is completely clear, and obtain Reaction precursor;

[0042] (2) The fluorine-doped tin dioxide conductive glass was ultrasonically cleaned with acetone, absolute ethanol and deionized water for 15 minutes in sequence, and then soaked in absolute ethanol for use after taking it out;

[0043] (3) Dry the fluorine-doped tin dioxide conductive glass and put it into the polytetrafluoroethylene liner, pour the reaction precursor solution, the conductive surface of the fluorine-doped tin dioxide is facing down, so that the fluorine-doped tin dioxide is completely Soak in the reaction precursor solution, put the liner into the autoclave;

[0044] (4) Put the high-pressure reaction kettle into a 120°C electric heating constant temperature drying oven, and after 8 hours of reaction, take ...

Embodiment 3

[0050] Example 3: Titanium dioxide-supported nickel ferrite and graphene oxide composite films obtained by different graphene oxide impregnation times.

[0051] Such as image 3 As shown, the composite films of titania-supported nickel ferrite and graphene oxide obtained by different immersion times of graphene oxide were investigated in 90min, and the light intensity was 100mW / cm 2 Under visible light, the degradation rate of 20mg / L unsymmetrical dimethylhydrazine simulated wastewater. As the number of graphene oxide layers increases, the degradation rate of unsymmetrical dimethylhydrazine wastewater also increases, and tends to be saturated after 9 times, because too much graphene oxide will lead to visible light reaching the nickel ferrite. decrease very much.

[0052] After 9 depositions of graphene oxide, the catalytic degradation efficiency of titanium dioxide-supported nickel ferrite and graphene oxide composite film is compared with that of titanium dioxide-supported...

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Abstract

The invention discloses a titanium dioxide loaded nickel ferrite and graphene oxide composite thin film, a preparation method thereof, and application of the titanium dioxide loaded nickel ferrite andgraphene oxide composite thin film to wastewater treatment, and belongs to the technical field of wastewater treatment. The method comprises the steps: titanium dioxide is grown on fluorine doped tindioxide conductive glass through a hydrothermal method, and a nanorod array thin film with good discreteness is obtained; nickel ferrite nanoparticles are deposited on the titanium dioxide through animpregnated calcination method to obtain a titanium dioxide loaded nickel ferrite composite thin film, and the thin film has a good organic wastewater treatment effect under visible light; and a graphene oxide thin film is deposited on the titanium dioxide loaded nickel ferrite composite thin film through an impregnation method, and according to the titanium dioxide loaded nickel ferrite and graphene oxide composite thin film, compared with the titanium dioxide loaded nickel ferrite composite thin film, the visible light organic wastewater degradation efficiency is obviously improved. The treatment method is simple, the visible light catalysis performance is obviously improved, and the treatment method has wide application prospects in wastewater treatment.

Description

technical field [0001] The invention belongs to the technical field of organic wastewater treatment, and in particular relates to a composite film of nickel ferrite and graphene oxide supported on titanium dioxide, a preparation method and its application in wastewater treatment. Background technique [0002] With the development and progress of society, a large amount of organic wastewater will be produced in production and life, seriously affecting human health and the natural environment. Commonly used physical and chemical treatment methods have disadvantages such as high energy consumption, low treatment efficiency, and easy to cause secondary pollution. Inexpensive, non-toxic, chemically stable, and efficient photocatalyst titanium dioxide can use sunlight as a driving energy, providing a good solution for the treatment of organic wastewater. Since the bandgap width of titanium dioxide is about 3.0eV, it can only use ultraviolet light which accounts for less than 5% o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755C02F1/30C02F101/38
Inventor 谢拯佘湘阳刘祥萱高鑫杨玉雪
Owner ROCKET FORCE UNIV OF ENG
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