Method for preparing graphene material by microwave irradiation in vacuum or inert gas environment

A technology of microwave irradiation and inert gas, applied in the direction of graphene, nanotechnology for materials and surface science, chemical instruments and methods, etc., can solve the problems of graphene being easy to burn, low final yield, and causing fire hazards , to achieve simple equipment, increase productivity, and avoid burning effects
CN102139873AInactive Publication Date: 2011-08-03无锡第六元素高科技发展有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
无锡第六元素高科技发展有限公司
Publication Date
2011-08-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for preparing graphene material by microwave irradiation in a vacuum or inert gas environment. The method comprises the following steps: taking dry graphite particles to be placed in a vacuum cavity of a microwave chamber and closing a top cap of the vacuum cavity; pumping the air pressure in the vacuum cavity to be in an ultimate vacuum state; injecting gas into the vacuum cavity till driving residue oxygen in the vacuum cavity; starting the microwave irritation till the oxidation graphite explodes and breaks; closing the microwave irritation and filling the air pressure in the vacuum cavity to be in an atmosphere state; opening the top cap of the vacuum cavity and collecting the exploded and reduced oxidized graphite powder. The method has the advantages that the heating is concentrated due to microwave and the power is high; graphite is heated and oxidized in short time so that the oxidized graphite is heated and reduced instantly and rapidly expands to release a large quantity of gas; the vacuum cavity can effectively isolate the contact between oxygen and graphene so as to avoid the combustion of graphene in the high temperature reduction process, thereby increasing the reduction yield.
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Description

technical field

[0001] The invention relates to a method for preparing graphene materials by microwave irradiation in a vacuum or an inert gas environment, and the obtained products can be applied to multiple technical fields, including energy storage and coating materials. Specifically, the invention is a process for preparing graphene materials with high specific surface area and high conductivity. Background technique

[0002] Graphene, English name Graphene, is a two-dimensional lattice structure in which carbon atoms are arranged in a hexagonal manner. As a single-layer carbon-atom planar material, graphene can be obtained by exfoliating graphite materials. Graphene has become the focus of scientific and industrial attention since the graphite crystal film was discovered by scientists at the University of Manchester in 2004. The thickness of graphene is only 0.335 nanometers, which is not only the thinnest among known materials, but also very firm and hard; as a simpl...

Claims

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