A kind of method that vacuum energy prepares sponge body graphene

Abstract

The invention discloses a method for using vacuum energy to prepare cavernous body graphene. A graphite rod is fed into a reaction chamber in a vacuum reaction still, under a vacuum environment, electric arcs of which the temperature is 10,000-13,000 DEG C are utilized to ionize the graphite rod, and single-layer graphene is obtained in the inner wall area of the reaction chamber. The method is utilized so that single-layer graphene with high purity can be purified and produced in one time under a low voltage and small current condition, the thickness of single-layer graphene is 0.34 nm-1.3 nm, and the size is 4-6 micrometers. The primary finished product obtaining rate exceeds 30%, and the method has the highest one-time raw material purification rate of graphene currently. In the production process, no sewage is drained, the cost is low, the product purity is high, the energy dissipation is low, the performance is excellent, the dispersity is good, and the product is not easily oxidized, and has the features of magnetic performance and the like. The prepared single-layer graphene contains multiple high-performance nanometer carbon-based materials like zero-dimension fullerene, one-dimension carbon nano tubes, two-dimension graphene, and three-dimension super-nanometer graphite crystals.

Description

Technical field: [0001] The invention belongs to the field of graphene preparation, in particular to a method for preparing sponge graphene by vacuum energy. Background technique: [0002] Single-layer graphene has a perfect two-dimensional crystal structure, its crystal format is a hexagon surrounded by six carbon atoms, and its thickness is one atomic layer. Graphene is 100 times stronger than the best steel and even stronger than diamond. Graphene has good electrical conductivity. Graphene is a new generation of transparent conductive materials. [0003] At present, the main preparation methods of graphene are chemical growth method and physical exfoliation method. The chemical growth method has low efficiency and is not suitable for industrialized disclosure production. The physical exfoliation method mainly uses cheap graphite as a raw material, and by applying mechanical force to the graphite crystal, the graphite layers are exfoliated, breaking the van der Waals f...

AI Technical Summary

Problems solved by technology

The chemical growth method is inefficient and not suitable for industrial disclosure production

The physical exfoliation method mainly uses cheap graphite as a raw material, and by applying mechanical force to the graphite crystal, the graphite layers are exfoliated, breaking the van der Waals force between the graphite layers, and forming a single-layer graphene. Although the prospect is very good, the current technology It is difficult to prepare a large amount of single-layer graphene

[0004] Graphene is also prepared by electric arc method in the prior art, but its production method consumes a lot of energy, and the number of graphene layers prepared is relatively high, so it cannot be produced into single-layer graphene in large quantities at low cost.

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