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Transparent graphene oxide film and method for regulating transmittance

A graphene film and transparent oxidation technology, applied in the field of transparent graphene oxide film and light transmittance adjustment, can solve problems such as waste of raw materials, and achieve the effects of simple method, good adjustment and easy realization

Active Publication Date: 2010-06-16
SHENZHEN CTRUST TESTING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of preparing graphite oxide from graphite, the water washing process after the oxidation reaction will dissolve a certain amount of graphite oxide in water to form a graphene oxide aqueous solution. Inappropriate use, resulting in invisible waste of raw materials

Method used

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  • Transparent graphene oxide film and method for regulating transmittance
  • Transparent graphene oxide film and method for regulating transmittance
  • Transparent graphene oxide film and method for regulating transmittance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Measure 80ml of the "waste liquid" obtained in the water washing process when preparing graphite oxide by Hummers method, and add an appropriate amount of H 2 SO 4 , To obtain a graphene oxide aqueous solution with pH = 1.00 (such as figure 1 (a) Shown). Then transfer the graphene oxide aqueous solution into a water bath at 80°C and keep it for 45 minutes to form a uniform graphene oxide film on the liquid surface. Remove the graphene oxide film on the liquid surface and dry it for 12 hours at room temperature to obtain no support A graphene oxide film with a thickness of 0.1 μm (such as figure 1 (b) Shown). Test the absorbance of the film in the whole wavelength range, and the results are as follows Image 6 As shown, it shows that the film has very weak light absorption in the near infrared region.

Embodiment 2

[0035] Measure 80ml of the "waste liquid" obtained in the water washing process when the Brodie method prepares graphite oxide, and by adding an appropriate amount of KOH, a graphene oxide aqueous solution with pH = 4.00 (such as figure 2 (a) Shown). Then transfer the graphene oxide aqueous solution into a water bath at 80°C for 15 minutes to form a uniform graphene oxide film on the liquid surface, remove the graphene oxide film on the liquid surface, and dry it at room temperature for 12 hours to obtain a support Graphene oxide film with a thickness of 0.01 μm (such as figure 2 (b) Shown).

Embodiment 3

[0037] Measure 80ml of the "waste solution" obtained in the water washing process when preparing graphite oxide by the Staudemaier method, and add an appropriate amount of NaOH to obtain a graphene oxide aqueous solution with pH=6.00 (such as image 3 (a) Shown). Then transfer the graphene oxide aqueous solution into a 5°C water bath and keep it for 48 hours. A uniform graphene oxide film can be formed on the liquid surface. The graphene oxide film on the liquid surface can be taken out and dried at room temperature for 12 hours to obtain no support. Graphene oxide film (such as image 3 (b) Shown).

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Abstract

The invention relates to a transparent graphene oxide film and a method for regulating transmittance. The method comprises the following steps: using waste liquid or common graphene oxide solution in the graphite oxide preparation process as a raw material, obtaining graphene oxide solution with different transmittances through addition of appropriate amount of acid or alkali with appropriate concentration to regulate the pH value of the solution; and preparing the graphene oxide solution into graphene oxide films with different transmittances, wherein the thickness of the graphene oxide film is between 0.01 and 100 mu m. The method for regulating the optical property of the transparent graphene oxide film comprises that: the graphene oxide film can be prepared when the pH value of the solution is between 1 and 13; with the increase of the pH value of stock solution, the transmittance of the prepared graphene oxide film is reduced; and when the pH value is smaller, the transmittance of the prepared film is relatively high and the transmissivity on near infrared reaches over 80 percent. The method for regulating the optical property of the graphene oxide film has the characteristics that the method is simple and easy to implement, can better regulate the transmittance of the graphene oxide film, and the like.

Description

Technical field [0001] The invention relates to a transparent graphene oxide film and a method for adjusting light transmittance, and belongs to the preparation of a special film and optical property control technology. Background technique [0002] Graphene, that is, graphite with less than 10 layers of carbon atoms, is the basic unit of fullerene, carbon nanotubes and graphite. Graphene has many peculiar properties. Graphene is a substance with no energy gap, showing metallicity; in a single layer of graphene, each carbon atom has an unbonded electron, so it has very good conductivity; holes and electrons in graphene The separation leads to new electronic conduction phenomena, such as the irregular quantum Hall effect. Graphene has very broad application prospects. Its unique properties provide a good physical experiment platform. It is also the best material for manufacturing nanoelectronic devices-high-frequency transistors and single-electron transistors. It also has a lot ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 杨全红游从辉吕伟
Owner SHENZHEN CTRUST TESTING TECH CO LTD
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