Green efficient electrochemical preparation method of high-quality water-soluble graphene

A water-soluble, graphene technology, applied in the direction of graphene, nano-carbon, etc., can solve the problems of weak oxidation efficiency and insolubility of the electrolyte, achieve a wide range of industrial application prospects, short process time, and overcome the effects of poor water solubility

Inactive Publication Date: 2018-11-16
青岛烯碳瑞尔新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, graphene prepared by existing electrochemical techniques is basically dissolved in organic solvents and cannot be dissolved in water.
The main reason why electrochemically prepared graphene is difficult to dissolve in water is that under the action of an electric field, although graphite is at the anode,

Method used

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  • Green efficient electrochemical preparation method of high-quality water-soluble graphene
  • Green efficient electrochemical preparation method of high-quality water-soluble graphene
  • Green efficient electrochemical preparation method of high-quality water-soluble graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment adopts the following steps in order to prepare high-quality water-soluble graphene.

[0034] a) Build a device for preparing water-soluble graphene:

[0035] Dissolve 13.8g of salicylic acid and 16.0g of sodium hydroxide in 1000mL of deionized water and put it in a 2000mL beaker to be the electrolyte; Dilute 10*10*0.3cm 3 Graphite foil as anode, 10*20*0.1cm 3 The platinum sheet is used as the cathode, and the two electrodes are vertically and parallelly placed in the electrolyte, the distance between the two electrodes is 3cm, and the two electrodes are respectively connected to the positive and negative poles of the DC power supply with wires;

[0036] b) peel off the graphite foil to prepare water-soluble graphene:

[0037] The voltage of the power supply is set to 10V, and the electrolytic reaction is carried out to electrochemically peel off the graphite foil; in the electrolytic reaction, accompanied by magnetic sub-stirring, the rotational speed ...

Embodiment 2

[0044] This embodiment adopts the following steps in order to prepare high-quality water-soluble graphene.

[0045] a) Build a device for preparing water-soluble graphene:

[0046] Dissolve 16.6g of terephthalic acid and 16.0g of sodium hydroxide in 1000mL of deionized water, and place it in a 2000mL beaker to form the electrolyte; 10*10*0.3cm 3 Graphite foil as anode, 10*20*0.1cm 3 The platinum sheet is used as the cathode, and the two electrodes are vertically and parallelly placed in the electrolyte, the distance between the two electrodes is 3cm, and the two electrodes are respectively connected to the positive and negative poles of the DC power supply with wires;

[0047] b) peel off the graphite foil to prepare water-soluble graphene:

[0048] The voltage of the power supply is set to 10V, and the electrolytic reaction is carried out to electrochemically peel off the graphite foil; in the electrolytic reaction, accompanied by magnetic sub-stirring, the rotational speed...

Embodiment 3

[0055] This embodiment adopts the following steps in order to prepare high-quality water-soluble graphene.

[0056] a) Build a device for preparing water-soluble graphene:

[0057] Dissolve 12.2g of benzoic acid and 8.0g of sodium hydroxide in 1000mL of deionized water and place it in a 2000mL beaker to form the electrolyte; 3 Graphite foil as anode, 10*20*0.1cm 3 The platinum sheet is used as the cathode, and the two electrodes are vertically and parallelly placed in the electrolyte, the distance between the two electrodes is 3cm, and the two electrodes are respectively connected to the positive and negative poles of the DC power supply with wires;

[0058] b) peel off the graphite foil to prepare water-soluble graphene:

[0059] The voltage of the power supply is set to 12V, and the electrolytic reaction is carried out to electrochemically peel off the graphite foil; in the electrolytic reaction, accompanied by magnetic sub-stirring, the rotational speed of the magnetic su...

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Abstract

A green efficient electrochemical preparation method of high-quality water-soluble graphene comprises the following steps: (a) taking the water solution of aromatic carboxylic acid and metal hydroxideas an electrolyte, a graphite material as an anode material and a platinum sheet as a cathode material, and enabling two electrodes to be connected with a DC (direct current) voltage-stabilized powersupply; (b) switching on supply voltage to perform electrolytic reaction to obtain preliminarily dispersed water-soluble dispersion matter; (c) enabling the dispersion matter obtained in step b to besuccessively subjected to ultrasonic treatment and centrifugal washing to obtain high solid content graphene slurry; and (d) enabling the high solid content graphene slurry obtained in step c to be ultrasonically dispersed in water to obtain stable graphene dispersion liquid. The method has the advantages that the raw materials are easy to prepare and obtain, the technological process is simple,the post-treatment is simple and convenient, the cost is low, and the efficiency and yield are high. The prepared graphene has excellent conductive, heat-conducting and mechanical properties, and meanwhile can be stably dispersed in water for 6 months or more under the condition of not adding a dispersing agent.

Description

technical field [0001] The invention relates to the technical field of graphene material preparation, in particular to a green and efficient electrochemical preparation method of high-quality water-soluble graphene. Background technique [0002] Graphene is composed of single layer sp 2 Honeycomb-like hexagonal planar two-dimensional crystals formed by the arrangement of hybridized carbon atoms. On the two-dimensional plane, sp 2 The hybridized carbon atoms are connected to the adjacent three carbon atoms through strong σ bonds, and the remaining P electron orbitals are perpendicular to the graphene plane, forming large π bonds with the surrounding atoms, so that graphene has good electrical and thermal conductivity and mechanical properties. performance. Graphene has always attracted great interest in scientific research and industry because of its excellent special properties. However, graphene with a complete structure is a two-dimensional crystal composed of six-member...

Claims

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Application Information

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IPC IPC(8): C01B32/19
CPCC01B32/19
Inventor 韩立静仲玉斐郑丛丛
Owner 青岛烯碳瑞尔新材料科技有限公司
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