Method using carbon dioxide as raw material to prepare high-quality graphene

Abstract

The invention discloses a method using carbon dioxide as a raw material to prepare high-quality graphene. The method comprises the following steps: (1) putting magnesium powder into a tube-type high-temperature furnace, and raising temperature to the 500-800 DEG C of burning temperature of magnesium powder under the protection of carbon dioxide with 90.00-99.99 percent of purity and 50-75 ml / min of flow; after achieving the 500-800 DEG C of burning temperature of magnesium powder, increasing the flow of carbon dioxide to 100-300 ml / min, reacting for 20-60 minutes at high temperature, regulating the flow of carbon dioxide to 70-75 ml / min, and cooling to room temperature to obtain coarse graphene powder; and (2) pouring the obtained coarse graphene powder into a hydrochloric acid solution with concentration of 1-10 mol / L, magnetically stirring for 40-80 minutes, filtering, cleaning to neuter with deionized water, then putting into a drying oven and drying at the temperature of 100-150 DGE C. The method is simple, fast, safe and environmentally-friendly, the prepared graphene can be directly used in mechanical property reinforced phases of composite materials or drug carrier with benzene rings and is applied to the fields of light, electricity, chemistry, physics and the like.

Description

technical field [0001] The invention relates to a fast, simple and cheap method for preparing high-quality graphene by using carbon dioxide gas as a raw material. Background technique [0002] Graphene is a new material with a layered structure composed of carbon atoms, in which sp 2 The hybrid orbitals are connected to form a two-dimensional material with a hexagonal honeycomb lattice. Until 2004, graphene was thought to be impossible to exist on its own, until Andre Geim and Konstantin Novoselov at the University of Manchester, UK, made it a reality through experiments [1] (KS Novoselov, AK Geim, SV Morozov, et al. Electric field effect in atomically thin carbon films[J]. Science, 2004(306):666-669.). Because graphene has many excellent photoelectric, mechanical and chemical properties, since the advent of graphene, it has caused a research boom all over the world. At present, the preparation methods of graphene mainly include mechanical methods and chemical methods. A...

AI Technical Summary

Problems solved by technology

However, the storage and use of dry ice has great limitations, and it is not as convenient as carbon dioxide gas. Therefore, it will be simpler, safer and faster to prepare graphene from carbon dioxide gas.

Images