Graphene oxide preparation method based on secondary controllable electrochemical technology

An electrochemical and graphene technology, applied in the field of graphene oxide preparation based on secondary controllable electrochemical technology, can solve the problem that the electrochemical oxidation stripping method cannot realize graphene oxide, and cannot control the composition and structure of graphene oxide. and other problems, to achieve the effect of low cost, reduced preparation cost and single component

Active Publication Date: 2021-03-30
HEILONGJIANG HEIKE TECH CO LTD
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Problems solved by technology

[0009] In order to solve the problem that the existing chemical oxidation method cannot control the composition and structure of graphene oxide by controlling the reaction parameters; the electrochemical oxidation stripping method cannot realize the controllable preparation of graphene oxide by using natural flake graphite directly as a raw material

Method used

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  • Graphene oxide preparation method based on secondary controllable electrochemical technology
  • Graphene oxide preparation method based on secondary controllable electrochemical technology
  • Graphene oxide preparation method based on secondary controllable electrochemical technology

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Embodiment

[0096] 1. Electrochemical intercalation reaction process of graphite interlayer compounds

[0097] The first analysis of the influence of electrolyte concentration on graphite intercalation compounds:

[0098] The electrochemical oxidation intercalation reaction of graphite was carried out with the intercalation agent concentrated sulfuric acid as the electrolyte. The material ratio is: m 石墨 (g): V 浓硫酸 (mL)=1:1.1. At a current density of 30mA / cm 2 1. Under the condition that the reaction time is 120min, the electrochemical oxidation intercalation reaction is carried out by changing the concentration of sulfuric acid to 90%, 93%, 95% and 98%, respectively. Under the action of constant current, as the electrochemical intercalation reaction proceeds, the material layer reaction zone gradually turns blue from the bottom to the top. Studies have shown that as the concentration of sulfuric acid electrolyte increases, the blue first-order graphite intercalation compound appears ...

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Abstract

The invention discloses a graphene oxide preparation method based on a secondary controllable electrochemical technology, belonging to the field of graphene oxide preparation. The invention aims to solve the problem that the composition and the structure of graphene oxide cannot be regulated and controlled by controlling reaction parameters in a conventional chemical oxidation method, and he problem that an electrochemical oxidation stripping method cannot realize controllable preparation of graphene oxide by directly taking natural crystalline flake graphite as a raw material. The graphene oxide preparation method based on the secondary controllable electrochemical technology in the invention comprises the following steps: carrying out an electrochemical oxidation intercalation reaction on natural flake graphite to obtain a graphite intercalation compound; then carrying out an electrochemical oxidation stripping reaction on the graphite intercalation compound to obtain electrochemicalgraphene oxide; and carrying out ultrasonic dispersion on an electrochemical graphene oxide electrolyte to obtain a stable graphene oxide dispersion liquid. The method is mainly used for preparing graphene oxide.

Description

technical field [0001] The invention belongs to the field of graphene oxide preparation, in particular to a method for preparing graphene oxide based on secondary controllable electrochemical technology. Background technique [0002] The electrochemical exfoliation preparation method of graphene can be divided into two categories according to the intercalation mechanism: the first type, the anion intercalation in the electrolyte enters the graphite anode exfoliation to obtain graphene, which is the main method for electrochemical exfoliation to prepare graphene; The second type, cation intercalation into the graphite cathode, can avoid the oxidation of the graphite surface and the generation of chemical functional groups. Although this type of method has great advantages, only a few literature reports have successfully prepared few-layer graphene. [0003] The principle of preparing graphene by anodic oxidation exfoliation method is to use graphite as the anode. Under the ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/198
CPCC01B32/198C01B2204/30C01B2204/32
Inventor 阚侃王珏付东张晓臣张伟君
Owner HEILONGJIANG HEIKE TECH CO LTD
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