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Preparation method of oxide quantum dot modified graphene/titanium oxide photocatalysis material

A photocatalytic material and graphene technology, applied in the field of photocatalysis, can solve the problems of low utilization rate of sunlight and low photocatalytic efficiency, and achieve the effects of improving the utilization rate of visible light, improving the photon quantum yield, and reducing curling.

Active Publication Date: 2018-01-26
湖南得成检测有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Existing graphene / titanium oxide photocatalytic materials generally have problems such as low sunlight utilization rate and photocatalytic efficiency, and can only be active under the action of light. Visible photocatalytic material with high activity and "light storage" effect

Method used

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  • Preparation method of oxide quantum dot modified graphene/titanium oxide photocatalysis material
  • Preparation method of oxide quantum dot modified graphene/titanium oxide photocatalysis material
  • Preparation method of oxide quantum dot modified graphene/titanium oxide photocatalysis material

Examples

Experimental program
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Effect test

Embodiment 1

[0036] (1) Add 10 g of molybdenum oxide powder into 800 mL of water, ultrasonically disperse for 40 minutes and then stir for 35 minutes to obtain a molybdenum oxide powder dispersion;

[0037] (2) Under ultrasonic vibration, carry out ultrasonic dispersion 3h to above-mentioned step (1) molybdenum oxide powder solution, centrifuge under 10000r / min to obtain molybdenum oxide quantum dot solution;

[0038] (3) 0.08g graphene was added to 70mL absolute ethanol and ultrasonically dispersed for 40min to obtain a graphene dispersion;

[0039] (4) Under the ultrasonic stirring situation, get 12g polyaniline and dissolve in 60mL dehydrated alcohol, after ultrasonic oscillation and stirring 50min, the polyaniline dispersion liquid is slowly poured in the graphene dispersion liquid that above-mentioned step (3) obtains, Obtain graphene-polyaniline absolute ethanol solution after ultrasonic stirring for 30min;

[0040] (5) Measure 20mL of absolute ethanol, 4mL of glacial acetic acid an...

Embodiment 2

[0048] (1) Add 8 g of manganese oxide powder into 1000 mL of water, ultrasonically disperse for 20 minutes, and then stir for 20 minutes to obtain a manganese oxide powder dispersion;

[0049] (2) Under ultrasonic vibration, the manganese oxide powder solution in the above step (1) was ultrasonically dispersed for 2 hours, and centrifuged at 9000r / min to obtain the manganese oxide quantum dot solution;

[0050] (3) Add 0.1 g of graphene to 30-70 mL of absolute ethanol for ultrasonic dispersion for 40 min to obtain a graphene dispersion;

[0051] (4) Under the ultrasonic stirring situation, get 10g polythiophene and dissolve in 50mL dehydrated alcohol, after ultrasonic oscillation and stirring 30min, pour polythiophene dispersion into the graphene dispersion that above-mentioned step (3) obtains slowly, Obtain graphene-polythiophene absolute ethanol solution after ultrasonic stirring for 15 min;

[0052] (5) Measure 15mL of absolute ethanol, 2mL of glacial acetic acid and 8mL ...

Embodiment 3

[0058] (1) Add 8g of tin oxide powder into 800mL of water, ultrasonically disperse for 40min and then stir for 40min to obtain tin oxide powder dispersion;

[0059] (2) Under ultrasonic oscillation, ultrasonically disperse the oxide powder in the above step (1) for 3 hours, and centrifuge at 10000r / min to obtain an oxide quantum dot solution;

[0060] (3) 0.1g of graphene was added to 70mL of absolute ethanol and ultrasonically dispersed for 40min to obtain a graphene dispersion;

[0061] (4) Under the ultrasonic stirring situation, get 12g polypyrrolidone and dissolve in 60mL dehydrated alcohol, after ultrasonic oscillation and stirring 60min, the polyacetylene dispersion is slowly poured in the graphene dispersion that above-mentioned step (3) obtains, Obtain graphene-polyacetylene absolute ethanol solution after ultrasonic stirring for 30min;

[0062] (5) Measure 15mL of absolute ethanol, 4mL of glacial acetic acid and 8mL of butyl titanate in sequence to form a mixed solu...

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Abstract

The invention discloses a preparation method of an oxide quantum dot modified graphene / titanium oxide photocatalysis material. The preparation method comprises following steps: modification with a conductive polymer is adopted so as to obtain a conductive polymer coated graphene; sol-gel method is adopted so as to prepare a sol from conductive polymer coated graphene, butyl titanate, and an oxidequantum dot; and aging, gelling, drying, grinding, and heat treatment are adopted to obtain the quantum dot modified graphene / titanium oxide porous nanometer catalysis material. According to the preparation method, surface modification with the conductive polymer is capable of improving the dispersion performance and the surface activity of graphene, loading graphene nanosheets with titanium oxidenanometer particles uniformly, and controlling the particle size of the nanometer particles; and in addition, construction of a oxide quantum dot-titanium oxide heterojunction is adopted to widen thespectrum response range and the photocatalytic activity of the catalysis material.

Description

technical field [0001] The invention relates to a preparation method of a graphene / titanium oxide photocatalytic material modified by oxide quantum dots, and belongs to the technical field of photocatalysis. Background technique [0002] Graphene has a special structure and excellent performance. Using it as a catalyst carrier can reduce the recombination of photogenerated electron-hole pairs of titanium oxide semiconductor catalysts and enhance its photocatalytic activity. However, due to the band gap of titanium oxide, only the ultraviolet part of sunlight can be used, and the photon quantum yield and sunlight utilization rate are low. In the composite process, graphene is difficult to disperse, easy to agglomerate and curl, it is difficult to achieve uniform loading of titanium oxide nanoparticles, and it is difficult to achieve effective combination between the two. Therefore, it is very necessary to further improve the utilization rate of visible light and photocatalyt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/14B01J23/28B01J23/30B01J23/34B01J35/10
Inventor 陈传盛王晨刘晓燕晁自胜范金成枚伟林敏
Owner 湖南得成检测有限公司
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