▎ 摘　　要

NOVELTY - The preparation of a single-layer continuous graphene film involves: introducing protective gas into a quartz tube arranged in a heating device, placing a copper foil at the center of a heating area, and preheating to 1000plus minus20 degrees Celsius for 2 hours; delivering a chromatographically pure hydrocarbon organic compound solution, reacting for 5 minutes, and growing graphene on a copper foil; cooling the quartz pipe until the temperature is lower than 300 degrees Celsius; and taking a Buchner funnel and sealing its lower part, pouring 0.5 mol/L of ferric chloride solution, cutting a copper substrate with graphene into small pieces, putting into the ferric chloride solution, opening a lower liquid opening of the funnel, filtering out ferrous chloride and copper chloride solution, keeping the graphene above the filter paper, dropwise adding deionized water above the funnel for cleaning, repeatedly cleaning with acetone to remove the analysis filter paper, and drying in vacuum. USE - Method for preparing single-layer continuous graphene film for use in electronic devices, sensors, lithium batteries, composite materials, super capacitance, invisible coatings, three-dimensional printings and solar batteries. ADVANTAGE - The chemical vapor deposition method has strong operability and is suitable for preparing continuous single-layer graphene films in batches, and can meet the requirements of special, high, precise and sharp fields. Natural flake graphite is not used as a raw material, hydrocarbons such as methane, ethylene, ethanol and sucrose are used as the raw material and are prepared by pyrolysis in a resistance furnace, and can be extracted by crops such as corn and straws. The method has the advantages of easily obtained raw materials, and no use of harmful solvents, thus environmental friendly. DESCRIPTION OF DRAWING(S) - The drawing shows a scanning electron microscope image of the product.