▎ 摘　　要

NOVELTY - Preparing graphene nanoribbons, comprises e.g. etching metal substrate surface using dilute acid solution, heating, passing methane, ethane, propane, acetylene and ethanol, and performing photocatalytic chemical vapor deposition, then cooling, scraping obtained carbon nanowall from the substrate, and pressing obtained nanowall powder into carbon nano-sheets to obtain working electrode, carrying out electrolytic reaction using the working electrode, filtering the electrolyte solution, dispersing obtained intercalated carbon nanowalls in ionic liquid, heating, filtering, and drying the residue. USE - The method is useful for preparing graphene nanoribbons (claimed). ADVANTAGE - The method produces graphene nanoribbons with uniform size and improved quality. DETAILED DESCRIPTION - Preparing graphene nanoribbons, comprises (a) etching metal substrate surface using dilute acid solution, and heating to 600-900 degrees C in absence of oxygen under a protective gas atmosphere, (b) passing methane, ethane, propane, acetylene and ethanol onto the surface of the metal substrate under UV irradiation, and performing photocatalytic chemical vapor deposition for 30-300 minutes to obtain carbon nanowall on the metal substrate surface, then (c) cooling the carbon nanowall on the metal substrate to room temperature under a protective gas atmosphere, scraping the carbon nanowall from the substrate to obtain carbon nanowall powder, (d) placing the carbon nanowall powder on a current collector and pressing into carbon nano-sheets to obtain working electrode, (e) immersing a counter electrode, a reference electrode and the working electrode in an electrolyte, and carrying out electrolytic reaction at room temperature for 1-20 hours under 5-100 mA/cm2 current density, (f) filtering the electrolyte solution, washing the residue and drying to obtain intercalated carbon nanowalls with solid-liquid ratio of 1 g:100 ml, and (g) dispersing the intercalated carbon nanowalls in ionic liquid to obtain dispersion, and heating the dispersion in fast medium wave radiator with 40-100 w/cm power, then filtering, washing the residue and drying to obtain final product.