Method for removing valence electrons of graphene

Abstract

The invention discloses a method for removing valence electrons of graphene. The method includes the following steps that oxidized graphene and a valence electron remover are sequentially added into a solvent, the mixture is dispersed and mixed to be uniform through ultrasonic treatment, the solvent is removed, and an oxidized graphene / valence electron remover mixture is obtained; the oxidized graphene / valence electron remover mixture is put in mixed gas flow of inert gas and carbon dioxide / water steam for activation, the gas flow is switched into a boron-bearing gas-state compound, heat is preserved for 5-24 hours at the temperature of 150-230 DEG C, the material is cooled to room temperature, and the graphene with the valence electrons removed is obtained. The valence electrons between layers of the graphene are removed through catalysis of doping elements, the intermolecular force between the layers of the graphene is reduced, stacking and compounding between the slice layers of the graphene are avoided accordingly, the characteristic that the graphene attract is changed, the problem that the graphene is clustered in oil is effectively solved, and the situation that the performance of graphene is lost due to stacking and compounding of the slice layers in the using process is relieved.

Description

technical field [0001] The invention belongs to the field of graphene modification and relates to a method for removing valence electrons from graphene. Background technique [0002] Graphene is a benzene ring structure material in which carbon atoms are closely arranged in two-dimensional space. In 2004, Novoselov et al. from the University of Manchester successfully prepared carbon atoms with sp 2 A two-dimensional single-layer graphene crystal composed of hybrid-connected monoatomic layers, which is the thinnest material found in the world so far. Graphene has a special structure and singular physical properties. In its structure, each carbon atom has 4 valence electrons, of which 3 electrons (2s electrons, 2px electrons and 2py electrons) form a planar sp 2 Hybrid orbitals, connecting three adjacent carbon atoms through σ bonds to form a hexagonal planar structure; the remaining one electron is located in the pz orbital in the normal direction, and forms a π band with a...

AI Technical Summary

Problems solved by technology

However, graphene with a complete structure has high chemical stability, weak interaction with other media, and strong van der Waals attraction between layers, making it difficult to disperse in many common solvents to form a stable solution, which poses a challenge to the further application of graphene. It is extremely difficult. To realize the uniform and stable dispersion of graphene in the oil, the surface of graphene should be modified to remove the valence electrons on the surface of graphene.

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