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Method for preparing water soluble graphene

A graphene and water-soluble technology, applied in the field of materials, can solve the problems of destroying the graphene structure and reducing the essential properties of graphene materials, and achieve good stability and good conductivity

Active Publication Date: 2011-08-10
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method prepares graphene oxide (Graphene oxide) by chemical oxidation, and then utilizes a large number of active groups such as carboxyl groups, hydroxyl groups and epoxy bonds contained on graphene oxide to react with organic matter, and prepares water-soluble However, due to the destruction of the structure of graphene by oxidation, the essential properties of this type of functionalized graphene material are significantly reduced (such as electrical conductivity)

Method used

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  • Method for preparing water soluble graphene
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  • Method for preparing water soluble graphene

Examples

Experimental program
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Effect test

Embodiment 1

[0058] A kind of preparation method of water-soluble graphene, as attached figure 1 shown, including the following steps:

[0059] In a 1000mL flask, add 400mL of hydrochloric acid with a mass concentration of 5%, then add 10g of natural graphite powder, soak at 20°C for 24h, centrifuge, and wash the filter cake with distilled water 6 times, 100mL each time, and then dry it in an oven at 105°C for 48h , to obtain pretreated graphite powder. In a 1000mL flask, add 200mL of concentrated sulfuric acid with a mass concentration of 98%, then add 10g of pretreated graphite powder, cool to 0°C in an ice-salt bath, and slowly add 25g of KMnO 4 , keep the temperature in the flask at 20°C. After the addition, the temperature was raised to 30°C, and after 2 hours of reaction, the reactants in the flask were slowly poured into a 4000mL beaker, 1500mL of distilled water was added, and then 20mL of hydrogen peroxide (you can see that the solution turned bright yellow), centrifuged at 300r...

Embodiment 2

[0064] A kind of preparation method of water-soluble graphene, as attached figure 1 shown, including the following steps:

[0065] In a 1000mL flask, add 500mL of hydrochloric acid with a mass concentration of 5%, then add 10g of natural graphite powder, soak at 30°C for 48h, centrifuge, and wash the filter cake with distilled water 6 times, 100mL each time, and then dry it in an oven at 110°C for 24h , to obtain pretreated graphite powder. In a 1000mL flask, add 250mL of concentrated sulfuric acid with a mass concentration of 98%, then add 10g of pretreated graphite powder, cool to 0°C in an ice-salt bath, stir at 70rpm, and slowly add 30g of KMnO 4 , keep the temperature in the flask at 20°C. After the addition, the temperature was raised to 35°C, and after 3 hours of reaction, slowly pour the reactants in the flask into a 4000mL beaker, add 2000mL of distilled water, and then add 25mL of hydrogen peroxide (you can see that the solution turns bright yellow), and centrifuge...

Embodiment 3

[0070] A kind of preparation method of water-soluble graphene, as attached figure 1 shown, including the following steps:

[0071] In a 1000mL flask, add 600mL of hydrochloric acid with a mass concentration of 5%, then add 10g of natural graphite powder, soak at 40°C for 24h, centrifuge, and wash the filter cake with distilled water 6 times, 100mL each time, and then dry it in an oven at 115°C for 48h , to obtain pretreated graphite powder. In a 1000mL flask, add 200mL of concentrated sulfuric acid with a mass concentration of 98%, then add 10g of pretreated graphite powder, cool to 0°C in an ice-salt bath, stir at 80rpm, and slowly add 25g of KMnO 4, keep the temperature in the flask at 20°C. After the addition, the temperature was raised to 30°C, and after 2 hours of reaction, slowly pour the reactants in the flask into a 4000mL beaker, add 1500mL of distilled water, and then add 30mL of hydrogen peroxide (you can see that the solution turns bright yellow), and centrifuge ...

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Abstract

The invention discloses a method for preparing water soluble graphene. The method for preparing the water soluble graphene comprises the following steps of: oxidizing graphite into graphite oxide; then adding coomassie brilliant blue; performing a reaction of the coomassie brilliant blue and the graphite oxide by ultrasound; adding a reducing agent; and performing a reaction to obtain the water soluble graphene. The solubility of the water soluble graphene can reach 1 to 1.5mg / mL, the electrical conductivity of the water soluble graphene can reach 1 to 2S m-1, and the water soluble graphene can be stably stored for 3 to 6 months without precipitates.

Description

technical field [0001] The invention belongs to the field of materials, and specifically relates to a method for preparing water-soluble graphene——preparing water-soluble graphene based on the π-π conjugation mechanism between aromatic water-soluble small molecule Coomassie Brilliant Blue and graphene. Background technique [0002] Graphene is composed of a single layer of carbon atoms and is a two-dimensional inorganic carbon material with a honeycomb structure. It is another major discovery after the discovery of fullerene in 1985 and carbon nanotubes in 1991. Since it was discovered in 2004, it has fully demonstrated its infinite charm in the field of materials research and practical application. It is currently the most active research object in the field of materials science and condensed matter physics. It is in electronics, information, energy, materials and biomedicine. The field shows broad application prospects. (Novoselov KS, Geim AK, Morozov SV, et al. Electric ...

Claims

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Application Information

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IPC IPC(8): C01B31/00C01B31/04
Inventor 谭绍早蔡祥谢阿贵林民松吴婷刘应亮张秀菊林志丹
Owner JINAN UNIVERSITY
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