Method for preparing graphene by using modifying supercritical peeling technology

Abstract

The invention provides a method for preparing graphene. The method comprises the following steps of: purifying a graphite raw material; guiding ions to a graphite intercalation by a chemical intercalation method to form a graphite intercalation compound, and performing graphite intercalation modularization; further making supercritical fluid (such as CO2, H2O, methane / ethane / propane, ethylene / propylene, methanol / ethanol, or ammonia or the like) act on the modularized graphite raw material by a modifying supercritical technology, wherein the supercritical fluid enters the graphite intercalation; and implementing effective peeling of a graphite layer by optimizing physical and chemical parameters (such as catalyst concentration, temperature, pressure and the like). According to the method, the peeling of the graphite layer is implemented by the modifying supercritical technology, and the graphene can be produced in batch.

Description

Method for preparing graphene by modified supercritical exfoliation technology 【Technical field】 The invention relates to the field of material preparation, in particular to the improvement of the preparation method of graphene. 【Background technique】 In 2010, Dr. Andre Geim and Dr. Konstantin Novoselov of the University of Manchester shared the Nobel Prize in Physics for their outstanding research on graphene. Based on the development of new carbon-based functional materials such as graphene, carbon-60, and carbon nanotubes, the scientific community generally believes that "the 20th century is the century of silicon (Si), and the 21st century will be the century of carbon (C)". Graphene has excellent electromechanical properties, such as: the fastest electron movement: the electron movement speed of graphene reaches 1 / 300 of the speed of light, far exceeding the movement speed of electrons in general conductors. The thinnest and hardest substance: James Hone and others ...

AI Technical Summary

Problems solved by technology

However, the current existing technical methods are either difficult to achieve mass production, or have problems such as safety and environmental pollution, which in turn lead to high cost and price of graphene

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