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Preparation method of water soluble graphene

A graphene and water-soluble technology, applied in the field of preparation of water-soluble graphene, can solve the problems of reducing agent consumption, complex process, unfriendly environment, etc., and achieve the effect of mild reaction conditions and high solubility

Inactive Publication Date: 2015-04-08
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, not only the operation steps are cumbersome, but also consume a large amount of reducing agent
Especially after the modification, toxic hydrazine hydrate is generally used as the reducing agent, which produces a large amount of toxic waste liquid. Therefore, these existing methods have the disadvantages of complicated process, high cost and unfriendly to the environment.

Method used

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  • Preparation method of water soluble graphene
  • Preparation method of water soluble graphene
  • Preparation method of water soluble graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Disperse 0.3g of graphene oxide in water, add 0.3g of p-hydrazinobenzenesulfonic acid, ultrasonicate for 1h in an ultrasonic scrubber, then react in a water bath at 85°C for 18h to obtain a black water-soluble solution, filter to remove insoluble impurities, and often pressure-evaporate the mother liquor After dehydration, excess p-hydrazinobenzenesulfonic acid was removed by a Soxhlet extractor, and vacuum-dried at 60°C to obtain water-soluble graphene.

Embodiment 2

[0020] Disperse 0.05g of graphene oxide in water, add 0.3g of p-hydrazinobenzenesulfonic acid, ultrasonicate for 1h in an ultrasonic scrubber, then react in a water bath at 85°C for 12h to obtain a black water-soluble solution, filter to remove insoluble impurities, and evaporate the mother liquor by rotary evaporation After concentrating under reduced pressure, excess p-hydrazinobenzenesulfonic acid was removed through a dialysis bag, and vacuum-dried at 60°C to obtain water-soluble graphene.

Embodiment 3

[0022] Disperse 0.3 g of graphene oxide in water, add 1.2 g of sodium p-hydrazinobenzenesulfonate, ultrasonicate for 1.5 h in an ultrasonic scrubber, and then react in a water bath at 75°C for 12 h to obtain a black water-soluble solution, which is filtered to remove insoluble impurities. After concentrating in a rotary evaporator under reduced pressure, excess sodium p-hydrazinobenzenesulfonate was removed through a dialysis bag, and vacuum-dried at 60° C. to obtain water-soluble graphene.

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Abstract

A preparation method of water soluble graphene mainly comprises the steps: with graphene oxide as raw material, under the action of p-hydrazinebenzenesulfonic acid or soluble p-hydrazinebenzenesulfonate, carrying out a reaction at a temperature of 70 DEG C-90 DEG C for 4-18 h, and thus obtaining the water soluble graphene. The obtained water soluble graphene has basic structure characteristics similar to those of graphene; and because the water soluble graphene has good solubility, the water soluble graphene is expected to be used as a novel material or a composite component applied in preparation of toughness electrodes, super capacitors, hydrogen storage, solar cells and thin film transistors and other related composite materials.

Description

technical field [0001] The invention relates to a technical method for preparing carbon materials, in particular to a method for preparing water-soluble graphene. Background technique [0002] Graphene is a new two-dimensional honeycomb carbonaceous material formed by the close packing of carbon atoms. The thickness of the crystal film is only 0.335nm, which is the basic unit for constructing other dimensional carbon materials. It can be warped into zero-dimensional fullerene, rolled into one-dimensional carbon nanotubes or stacked into three-dimensional graphite and diamond. The theoretical specific surface area of ​​graphene is as high as 2630m 2 / g, outstanding thermal conductivity (5000W / m.K), excellent mechanical properties, Young's modulus up to 1100GPa, breaking strength up to 125GPa, and high-speed electron mobility at room temperature, it has become the most potential multifunctional material for development and application. [0003] However, graphene is neither h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04C01B32/184
Inventor 王丽秋王鹏君刘洋
Owner YANSHAN UNIV