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Making method of graphene-based film with automatic cleaning function

A functional graphene, graphene-based technology, applied in the direction of liquid chemical plating, metal material coating process, coating, etc., can solve the problem that the self-cleaning function of graphene film has not been found

Inactive Publication Date: 2015-01-28
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, in the process of preparing graphene films based on redox method at home and abroad, no graphene films have been found to have a certain self-cleaning function.

Method used

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  • Making method of graphene-based film with automatic cleaning function
  • Making method of graphene-based film with automatic cleaning function
  • Making method of graphene-based film with automatic cleaning function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Use ethanol as the solvent to prepare 0.2mg / ml graphene oxide solution and 0.5mg / ml titanium dioxide solution. The two were blended so that the mass ratio of graphene oxide and titanium dioxide was 1:1, and the ultrasound was conducted for 30 minutes. The graphene oxide and titanium dioxide dispersion liquid is obtained. Take 6ml of the homogeneous solution and add it to the spray gun. The PC substrate is cleaned, then dried, and placed on a heating table to raise the temperature to 100°C. At this time, a spray gun connected with an air pump was used to spray the above solution on a PC substrate with an area of ​​5×5 cm, and the spray distance was about 5 cm. Prepared graphene oxide film / titanium dioxide film (such as figure 1 , figure 2 Shown). The film was placed in a 200ml methyl orange solution with a concentration of 2mg / L for degradation experiments. The power of the UV lamp is 175W, the distance between the lamp tube and the sample is 15cm, and the irradiatio...

Embodiment 2

[0033] Using ethanol as a solvent, a 0.2 mg / ml graphene oxide solution was prepared, and carbon nanotubes were added to make the mass ratio of graphene oxide and carbon nanotubes 5:1. After 30 minutes of ultrasound, the graphene oxide / carbon nanotube composite solution was prepared. The 0.5mg / ml titanium dioxide solution was also prepared with ethanol solution as solvent. The three are blended so that the mass ratio of graphene oxide, carbon nanotubes and titanium dioxide is 5:1:5, and the ultrasound is performed for 10 minutes. The graphene oxide / carbon nanotube / titanium dioxide dispersion is obtained. Take 6ml of the homogeneous solution and add it to the spray gun. The PC substrate is cleaned, then dried, and placed on a heating table to raise the temperature to 100°C. At this time, a spray gun connected with an air pump was used to spray the above solution on a PC substrate with an area of ​​5×5 cm, and the spray distance was about 5 cm. The graphene oxide / carbon nanotu...

Embodiment 3

[0035] The preparation method of graphene-based film with self-cleaning function includes the following steps:

[0036] (1) Prepare graphene oxide dispersion in water / ethanol or ethanol solution. The concentration of graphene oxide is 0.1 mg / ml. After ultrasonic vibration, a graphene oxide dispersion with better dispersion and stability is prepared.

[0037] As a preferred mode, the graphene oxide dispersion is added with an enhanced conductive material, and the weight ratio of the graphene oxide to the enhanced conductive material is 1:1. The reinforced conductive material is carbon nanotubes or metal nanowires.

[0038] (2) The nano-sized titanium dioxide was added to the ethanol solution, and a titanium dioxide dispersion with a concentration of 0.1 mg / ml was prepared after ultrasonic for 1 hour.

[0039] (3) After blending the graphene oxide dispersion with the titanium dioxide dispersion, properly sonicate to obtain the graphene oxide / titanium dioxide dispersion. In the graphene ...

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Abstract

The invention relates to a making method of a graphene-based film with an automatic cleaning function. The method comprises the following steps: respectively preparing a graphene oxide dispersion and a titanium dioxide dispersion, blending the graphene oxide dispersion with the titanium dioxide dispersion to obtain a graphene oxide / titanium dioxide dispersion, and injecting the graphene oxide / titanium dioxide dispersion to a target substrate in order to obtain a graphene oxide-based film; and irradiating the graphene oxide-based film by ultraviolet light to reduce the graphene oxide-based film in order to obtain the graphene-based film with an automatic cleaning function. Compared with graphene-based films in the prior art, the graphene-based film prepared through making the graphene oxide-based film by injecting and utilizing ultraviolet irradiation has the advantages of certain conductivity and certain automatic cleaning function. The graphene-based film can be further applied in the fields of graphene-based conductive coatings and graphene-based surface strain sensors.

Description

Technical field [0001] The invention relates to a method for preparing a graphene-based film, in particular to a method for preparing a graphene-based film with a self-cleaning function, and belongs to the technical field of functional film materials. Background technique [0002] Graphene has good transmittance. Theoretical and experimental results show that single-layer graphene absorbs 2.3% of visible light, that is, the transmittance is 97.7%. Each carbon atom in graphene is divided into sp 2 The way of hybrid orbital (σ bond) is connected with the other 3 carbon atoms, and the extremely strong C-C bond makes the graphene sheet layer have excellent mechanical properties. The remaining p-electron orbital is perpendicular to the graphene plane, forming a delocalized π bond with the surrounding carbon atoms, allowing electrons to move freely in the crystal, giving graphene good electrical properties. Because the force between atoms is very strong, at room temperature, even if t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/14
CPCC23C18/14
Inventor 张东李秀强
Owner TONGJI UNIV
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