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Titanium dioxide/graphene/carbon composite material, preparation method and application thereof

A carbon composite material, titanium dioxide technology, applied in chemical instruments and methods, separation methods, chemical/physical processes, etc., can solve the problems of low photocatalytic efficiency, unfriendly environment, high solvent cost, etc. The effect of strong control and convenient operation

Active Publication Date: 2021-01-05
NINGBO GRAPHENE INNOVATION CENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its photocatalyst powder faces problems such as low photocatalytic efficiency and low adsorption capacity in the application process.
[0004] The preparation of titanium dioxide-based photocatalytic composite materials in the prior art requires the use of hydrofluoric acid, etc., which is not environmentally friendly, and the post-treatment of solvents requires extremely high costs.

Method used

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  • Titanium dioxide/graphene/carbon composite material, preparation method and application thereof
  • Titanium dioxide/graphene/carbon composite material, preparation method and application thereof
  • Titanium dioxide/graphene/carbon composite material, preparation method and application thereof

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preparation example Construction

[0057] The invention provides a titanium dioxide / graphene / carbon composite material and its preparation method and application.

[0058] A method for preparing titanium dioxide / graphene / carbon composite material, prepared from raw materials including titanium dioxide, graphene, and carbon-containing compounds, said method comprising the steps of:

[0059] (1) adding raw materials other than the carbon-containing compound into a carbon-containing compound solution with a concentration of 0.05-3 mol / L, performing a hydrothermal reaction at 150-300° C. for 2-8 hours, and drying the solid to obtain a mixture after cooling;

[0060] (2) Anneal the mixture obtained in step (1) at 400-500° C. for 2-3 hours to obtain.

[0061] In the preparation method of the present invention, the titanium dioxide used may be commercially available titanium dioxide powder.

[0062] In the preparation method of the present invention, the graphene used may be commercially available graphene.

[0063] T...

Embodiment 1

[0119] This embodiment provides a titanium dioxide / graphene / carbon composite material and a preparation method thereof, the specific steps are as follows:

[0120] 1) Weigh 10g of nanoscale titanium dioxide and 0.5g of graphene powder, grind the two to make them evenly mixed.

[0121] 2) Weigh 3.6 g of glucose, dissolve it in deionized water, and prepare a solution with a concentration of 0.1 mol / L. The powder obtained by mixing the above step (1) was added into the glucose solution, stirred for 2 hours, and the cells were ultrasonically crushed for 20 minutes, so that the solute was fully dispersed in the solution. The mixture was put into a hydrothermal reaction kettle and reacted at 180°C for 4h. After cooling, take out the mixed solution and centrifuge again (6000r / min, 10min), pour off the suspension, and repeat the centrifugation 5 times until it is washed. Dry the remaining solid at 60°C.

[0122] 3) Weighing 3g of urea and grinding and mixing with the powder obtaine...

Embodiment 2

[0127] 1) Weigh 8g of nanoscale titanium dioxide and 0.5g of graphene powder, and grind the two to make them evenly mixed.

[0128] 2) Weigh 3.6 g of glucose, dissolve it in deionized water, and prepare a solution with a concentration of 0.1 mol / L. The powder obtained by mixing the above step (1) was added into the glucose solution, stirred for 2 hours, and the cells were ultrasonically crushed for 20 minutes, so that the solute was fully dispersed in the solution. The mixture was put into a hydrothermal reaction kettle and reacted at 180°C for 4h. After cooling, take out the mixed solution and centrifuge again (5000r / min, 10min), pour off the suspension, and repeat the centrifugation 5 times until it is washed. Dry the remaining solid at 60°C.

[0129] 3) Weighing 3g of urea and grinding and mixing with the powder obtained in step (2) to obtain a mixture for later use.

[0130] 4) Put the mixture in step (3) in a ceramic crucible, put it into a tube furnace, and heat it fo...

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Abstract

The invention discloses a titanium dioxide / graphene / carbon composite material, a preparation method and application thereof. The titanium dioxide / graphene / carbon composite material is prepared from raw materials including titanium dioxide, graphene and a carbon-containing compound. The preparation method comprises the following steps of: (1) adding the raw materials except the carbon-containing compound into a carbon-containing compound solution to carry out hydrothermal reaction, performing cooling, taking a solid, and performing drying to obtain a mixture; and annealing the mixture obtainedin the step (1). The preparation method is simple, feasible and convenient to operate; and the preparation process is high in controllability and has very high product stability. By synergistically optimizing hydrothermal reaction and annealing conditions, the titanium dioxide / graphene / carbon composite material with a stable shape structure can be obtained.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a titanium dioxide / graphene / carbon composite material and its preparation method and application. Background technique [0002] Studies have shown that photocatalytic technology has a good application prospect in environmental pollution control. Photocatalytic materials can effectively reduce the concentration of polluting gases in the environment, make organic or inorganic pollutants undergo redox reactions under the action of photocatalysis, and generate HO, CO, salts and other substances to achieve harmlessness and purify the environment. [0003] Titanium dioxide is the most commonly used photocatalytic material because of its ability to capture photons and achieve charge separation. The photocatalytic process of this type of inorganic semiconductor photocatalyst is realized by the electrons and holes generated by photoexcitation, which respectively undergo reduction and o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J21/18B01J27/24B01J35/10C02F1/30B01D53/86B01D53/72B01D53/44C02F101/30
CPCB01J21/063B01J21/18B01J27/24C02F1/30B01D53/007B01D53/8668B01D53/8687C02F2101/30C02F2305/10B01D2257/704B01D2259/802B01J35/61B01J35/39Y02W10/37
Inventor 陈荧赖垂林刘兆平
Owner NINGBO GRAPHENE INNOVATION CENT CO LTD
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