Reduction method of graphene oxide

Abstract

The invention discloses a reduction method of graphene oxide. According to the reduction method, with metal hydride as a reducing agent and lewis acid as a catalyst, graphene oxide is reduced at room temperature. The reduction method comprises the following steps: dispersing the graphene oxide in a solvent according to the dispersing concentration of 0.2mg / ml-4mg / ml by virtue of a magnetic stirring, high-shearing mixing or ultrasonic dispersing method; adding lewis acid, stirring and dispersing, wherein the adding concentration of the lewis acid is 1mM-30mM; adding metal hydride and stirring, wherein the dispersing concentration of the metal hydride is 10mM-300mM, and carrying out reduction reaction for 30 minutes to 12 hours at room temperature; filtering and washing by using a cleaning agent until the pH value is neutral, wherein the cleaning agent is pure water, and the metal hydride is one of lithium aluminum hydride, sodium borohydride and sodium hydride. The reduction method of the graphene oxide is efficient, cheap, non-toxic and pollution-free and capable of efficiently removing oxygen-containing functional groups out of graphene oxide, so that a hexatomic ring structure of the graphene oxide is recovered.

Description

technical field [0001] The invention relates to a reduction method of graphene oxide, belonging to the technical field of graphene material preparation; used for semiconductors, solar cells, sensors, nanoelectronics, high-performance nanoelectronic devices, composite materials, field emission materials, gas sensors and energy Storage and other technical fields. Background technique [0002] Graphene is a compound hexagonal lattice, and the basic structure is that each carbon atom sp 2 Orbital hybridization forms three covalent bonds, which respectively form three σ bonds with the three nearest neighboring carbon atoms, and the remaining one p electron is perpendicular to the surface of graphene and forms π bonds with the surrounding atoms. Graphene can exist freely at a limited temperature, and its thickness is only 0.3354nm. It is the thinnest material found in the world (Research Progress in the Preparation, Characterization and Properties of Graphene, Li Xingao, Wang Bol...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the shortcomings of the existing oxidation-reduction method for preparing graphene, the existing oxygen-containing functional groups remain on the surface of graphene, and the reduction reaction is not complete, thus affecting the use efficiency of graphene oxide, etc., the present invention discloses a reduction method of graphene oxide , the reduction method uses cheap, non-toxic, non-polluting metal hydride salt as a reducing agent, and a certain proportion of catalyst is added to improve its reducing ability