▎ 摘　　要

NOVELTY - Graphene nanobelt is prepared by etching metallic substrate (S110) using diluted acid solution, heating (S120) at 600-900 degrees C under anaerobic and protective gas atmosphere, passing metallic substrate surface into methane, ethane, propane, acetylene, or ethanol under UV light radiation, passing light through catalytic chemical vapor deposition, reacting for 30-300 minutes to obtain carbon nano wall in metallic substrate surface (S130), cooling at room temperature under protective gas atmosphere, and scraping carbon nano wall to obtain carbon nano wall powder (S140). USE - Preparation of graphene nanobelt (claimed). ADVANTAGE - Graphene nanobelt has higher uniformed size, better quality, and good dispersibility. DETAILED DESCRIPTION - Graphene nanobelt is prepared by etching metallic substrate (S110) using diluted acid solution, heating (S120) at 600-900 degrees C under anaerobic and protective gas atmosphere, passing metallic substrate surface into methane, ethane, propane, acetylene, or ethanol under UV light radiation, passing light through catalytic chemical vapor deposition, reacting for 30-300 minutes to obtain carbon nano wall in metallic substrate surface (S130), cooling at room temperature under protective gas atmosphere, scraping carbon nano wall to obtain carbon nano wall powder (S140), placing into fluid collector, pressing into carbon nano wall layer to obtain working electrode (S150), soaking reference electrode and working electrode into electrolyte having electric current density of 5-100 mA/cm2, reacting at room temperature for 1-20 hours, filtering electrolytic solution, washing filter residue, drying to obtain intercalated carbon nano wall layer (S160), dispersing intercalated carbon nano wall layer into ionic liquid with mass-to-volume ratio of 1 g:1-100 ml, ultrasonically stripping for 0.5-30 minutes having power of 2-10 kW, filtering, washing filter residue, and drying (S170). DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart for preparation of graphene nanobelt. (Drawing includes non-English language text). Etching metallic substrate (S110) Heating (S120) Obtain carbon nano wall in metallic substrate surface (S130) Obtain carbon nano wall powder (S140) Obtain working electrode (S150) Obtain intercalated carbon nano wall layer (S160) Drying (S170)