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Preparation method of efficient photocatalysis nanometer titanium dioxide/graphene composite material

A technology of nano-titanium dioxide and composite materials, which is applied in the field of preparation of highly catalytic nano-titanium dioxide/graphene composite materials, can solve problems such as not being achieved, and achieve the effects of low cost, good reaction conditions, and control of reaction conditions

Inactive Publication Date: 2017-09-26
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the photocatalytic efficiency of titanium dioxide / graphene composites has been improved to a certain extent, it is far from satisfactory, and there is still more room for improvement.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0038] The preparation method steps of the high-efficiency photocatalytic nano-titanium dioxide / graphene composite material of the present invention are as follows:

[0039] 1) Preparation of graphene oxide

[0040] 2) Preparation of nano-titanium dioxide / graphene composites

[0041] 2.1) Take titanium dioxide slurry;

[0042] 2.2) take the graphene oxide prepared in step (1), dissolve it in deionized water, and perform ultrasonic treatment to obtain a graphene oxide dispersion;

[0043] 2.3) mixing the titanium dioxide slurry with the graphene oxide dispersion, stirring;

[0044] 2.4) React the mixed solution with hydrothermal reaction at a temperature of 80-180°C for 4-12 hours;

[0045] 2.5) After the reaction is completed and lowered to room temperature, the obtained suspension is suction-filtered, and the filter cake is dried to obtain a nano-titanium dioxide / graphene composite material.

[0046] Preferably, the preparation of said step 1) graphene oxide comprises the...

Embodiment 1

[0073] (1) Measure 30ml of titanium dioxide slurry with a solid content of 0.054g / ml in a 200ml beaker;

[0074] (2) According to the amount of the titanium dioxide slurry measured in step (1), weigh 0.016g graphene oxide, be dissolved in 50ml deionized water, and use an ultrasonic disperser to sonicate for 1h to obtain a graphene oxide dispersion;

[0075] (3) Mix the titanium dioxide slurry measured in step (1) with the graphene oxide dispersion after ultrasonication in step (2), and place on a magnetic stirrer to stir for 1 h;

[0076] (4) Pour the mixed solution into the polytetrafluoroethylene bushing of the reaction kettle, tighten the lid of the kettle, place it in a box-type resistance furnace for hydrothermal reaction, adjust the reaction temperature to 120° C., and the reaction time to be 6 hours;

[0077] (5) After the reaction is completed and lowered to room temperature, take out the suspension in the reaction kettle, perform suction filtration, place the filter c...

Embodiment 2

[0080] (1) Measure 30ml of titanium dioxide slurry with a solid content of 0.054g / ml in a 200ml beaker;

[0081] (2) According to the amount of the titanium dioxide slurry measured in step (1), weigh 0.085g graphene oxide, be dissolved in 50ml deionized water, and use an ultrasonic disperser to sonicate for 1h to obtain a graphene oxide dispersion;

[0082] (3) Mix the titanium dioxide slurry measured in step (1) with the graphene oxide dispersion after ultrasonication in step (2), and place on a magnetic stirrer to stir for 1 h;

[0083] (4) Pour the mixed solution into the polytetrafluoroethylene bushing of the reaction kettle, tighten the lid of the kettle, place it in a box-type resistance furnace for hydrothermal reaction, adjust the reaction temperature to 150° C., and the reaction time to be 8 hours;

[0084] (5) After the reaction is completed and lowered to room temperature, take out the suspension in the reaction kettle, perform suction filtration, place the filter c...

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Abstract

The invention relates to a preparation method of an efficient photocatalysis nanometer titanium dioxide / graphene composite material, and belongs to the technical field of a catalysis nanometer composite material. The preparation method of the efficient photocatalysis nanometer titanium dioxide / graphene composite material comprises the following steps of (1) preparing graphene oxide; (2) preparing the nanometer titanium dioxide / graphene composite material. The preparation method of the efficient photocatalysis nanometer titanium dioxide / graphene composite material comprises the following advantages that (1) the used solution only contains water and does not contain other additives, so that the environment-friendly performance is good; no byproduct is generated; (2) the operation is simple; the reaction time is short; the stability is high; the repeatability is high; (3) the nanometer titanium dioxide / graphene composite material prepared by the method has excellent catalysis performance.

Description

technical field [0001] The invention relates to a preparation method of a highly catalytic nano-titanium dioxide / graphene composite material, belonging to the technical field of catalytic nano-composite materials. Background technique [0002] Titanium dioxide, as a non-polluting, non-toxic and environmentally friendly material, has unique and huge value in using solar energy to treat organic matter through photocatalysis, using solar energy to split water to produce hydrogen, and as a matrix material for solar cells. [0003] As a photocatalytic material, titanium dioxide has defects such as narrow light absorption range, low utilization rate of sunlight, and high photogenerated electron-hole recombination rate, which severely limit the use of titanium dioxide materials. [0004] Current studies have shown that graphene, as a carrier of titanium dioxide photocatalytic materials, can not only increase its specific surface area and adsorption performance, but also inhibit the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18C02F1/30C02F101/36C02F101/38
CPCC02F1/30B01J21/18C02F2101/36C02F2101/38C02F2101/40C02F2305/10B01J35/39
Inventor 罗金华彭富昌李桂芳
Owner PANZHIHUA UNIV