A kind of graphene and continuous preparation method thereof

Abstract

The invention provides a kind of graphene and its continuous preparation method. The preparation method comprises: relying on the action of gravity to make the graphene oxide go through the i-th reaction zone and the n-th reaction zone arranged vertically in order to obtain graphene, and the n-th reaction zone The temperature and pressure in the reaction zone are controlled as T n and P n , the temperature and pressure of the i-th reaction zone are controlled as T i and P i ,T i =w 1 i / n T n , P i =(P 0 -P n )·(1‑i / n), w 1 Choose from 0.80 to 1.20, P 0 Indicates 1 standard atmosphere, T n and P n They are above 1250°C and 30Pa~500Pa respectively, n is a natural number and ≥ 2, and i takes all natural numbers less than n. The present invention can remove metal and non-metal impurities at different temperatures and pressures, and remove a large number of oxygen-containing functional groups carried by graphene oxide at the same time, and repair the SP caused by graphene oxide during the preparation process. 3 hybridization defect.

Description

technical field [0001] The invention relates to the technical field of preparation of new materials, more specifically, to a graphene and its continuous preparation method. Background technique [0002] In 2004, physicists Andre Heim and Konstantin Novoselov of the University of Manchester first separated single-layer graphene from graphite by mechanical exfoliation, and studied its quasi- Particle properties, and field effect properties. This discovery quickly triggered a graphene research boom all over the world. In just a few years, the research and application of graphene have developed vigorously. [0003] Graphene is a two-dimensional honeycomb network structure composed of carbon atoms. It is a surface material composed of a single layer of carbon atoms that can be directly peeled off from graphite. The arrangement of carbon atoms in graphene is the same as that of graphite. They all belong to the compound hexagonal crystal structure. On the two-dimensional plane, S...

AI Technical Summary

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 large amount of metal and non-metallic impurities in the graphene produced by the redox method, which further affects the large-scale development and application of graphene; , high energy consumption, and inability to produce continuously will also affect the large-scale production of graphene

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