Low-impurity-content graphene preparation method

A graphene, low impurity technology, applied in the fields of graphene, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of production scale, affecting the large-scale development and application of graphene, affecting the performance of graphene, etc.

Active Publication Date: 2019-02-01
SICHUAN JUCHUANG SHIMOXI TECH CO LTD +1
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Problems solved by technology

On the one hand, the crystal structure of graphene prepared by redox method is easily destroyed in the process of oxidative intercalation, which leads to the increase of internal defects in graphene, which greatly affects the performance of graphene; On the one hand, there are still a larg

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  • Low-impurity-content graphene preparation method
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  • Low-impurity-content graphene preparation method

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Embodiment Construction

[0034] Hereinafter, a method for preparing graphene with low impurity content according to the present invention will be described in detail with reference to the accompanying drawings and exemplary embodiments.

[0035] Specifically, on the one hand, in the process of producing graphene oxide, especially in the process of producing graphene oxide by oxidation intercalation, impurity ions will combine with graphene oxide, which leads to low purity of graphene oxide. Existing graphene oxide purification methods have problems such as low efficiency and insufficient thoroughness. However, in the purification process of graphene oxide, the present invention simultaneously applies the method of complexing agent and dilute hydrochloric acid washing, and cooperates with ultrasonic action, so as to more effectively separate graphene oxide and impurity ions, and simultaneously isolate impurity ions Under the action of the complexing agent, it will not be combined with graphene oxide, t...

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Abstract

The invention provides a low-impurity-content graphene preparation method which includes the steps: purifying graphene oxide containing functional groups and impurities; reducing the purified grapheneoxide. Purification includes the steps: mixing the graphene oxide containing the functional groups and the impurities, complexing agents and acid solution to form mixed liquid; performing ultrasonicoscillation and filtration on the mixed liquid to obtain purified graphene oxide. Reduction of the purified graphene oxide includes the step: enabling the purified graphene oxide to sequentially go through reaction areas with different temperature and pressure intensity to obtain graphene. The graphene oxide and impurity ions can be effectively separated by purification, graphene oxide purification thoroughness can be improved, the graphene is prepared in the areas with different temperature and pressure intensity, metal and nonmetal impurities in the graphene can be removed, and SP3 hybridization defects caused in the preparation process of the graphene oxide are repaired.

Description

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Claims

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Application Information

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Owner SICHUAN JUCHUANG SHIMOXI TECH CO LTD
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