Process and device for preparing graphene quantum material

A process for preparing a graphene quantum material, comprising:

• providing a carbon-containing precursor;
• decomposing the carbon-containing precursor with an ultra-fast laser to obtain the graphene quantum material;
• optionally reducing graphene oxide into graphene with a laser;
• and
• optionally subjecting the graphene quantum material to microwave heating;
• wherein the carbon-containing precursor comprises biomass containing cellulose, lignin, or starch;
• the biomass is selected from plant biomass, comprising crop straws and husks, wood, wood chips, barks, branches, roots, leaves, fruits and vegetables;
• wherein providing the carbon-containing precursor comprises:
• adding one or more of powders of an organic polymer and powders of a non-polymeric carbon material to flakes or powders of the biomass;
• the organic polymer comprises at least one of polyimide (PI), polyethylene (PE), and polypropylene (PP);
• and
• the non-polymeric carbon material comprises at least one of graphite, charcoal, carbon black, coal.