▎ 摘　　要

NOVELTY - Metal substrate is acid-treated, placed in oxygen-free environment, heated, and processed with carbonaceous material. After terminating the reaction, the substrate is attached to carbon nano-wall surface. The metal substrate and carbon nanowall are separated, to obtain carbon nano-wall powder. The carbon nano-wall powder is mixed with metal chloride and reacted to obtain carbon-containing metal chloride-intercalated nano-wall. Carbon-containing metal chloride-intercalated nano-wall is treated with acetone, centrifuged and purified to obtain graphene nanoribbons. USE - Preparation of graphene nanoribbons (claimed). ADVANTAGE - The method efficiently provides graphene nanoribbons having controlled size. DETAILED DESCRIPTION - A metal substrate is acid-treated, placed in an oxygen-free environment and heated at 600-900 degrees C. Under UV irradiation, protective gas is introduced and carbonaceous material is added and reacted in chemical vapor deposition reactor. After terminating the reaction, the substrate is attached to carbon nano-wall surface of the metal. The metal substrate and carbon nanowall are separated, to obtain carbon nano-wall powder. The carbon nanowall powder is mixed with metal chloride in the mass ratio of 1:0.8-1:1.2, and reacted at 460-550 degrees C to obtain carbon-containing metal chloride intercalated nano-wall. The carbon-containing metal chloride-intercalated nano-wall is treated with acetone in the ratio of 1 g: 100-1000 ml, centrifugally-separated, and purified to obtain graphene nanoribbons.