▎ 摘　　要

NOVELTY - Preparing graphene nanoribbon/single-walled carbon nanotube intramolecular heterojunction involves adding single-walled carbon nanotubes and dopamine hydrochloride (HCl) into Tris-HCl buffer solution, reacting in dark environment, and filtering to obtain poly-dopamine modified single-walled carbon nanotubes; dispersing polydopamine modified single-walled carbon nanotubes in sulfuric acid solution, adding concentrated phosphoric acid, heating up, adding potassium permanganate, cooling to room temperature after reaction is finished, adding hydrogen peroxide, filtering, washing with water to neutrality, and obtaining melted single-walled carbon nanotubes; roasting melted single-walled carbon nanotube, then ultrasonically treating roasted product with hydrochloric acid solution, filtering, adding hydroiodic acid solution for reduction reaction, and filtering after reaction to prepare graphene nanoribbon/single-walled carbon nanotube intramolecular heterojunction. USE - Method for preparing graphene nanoribbon/single-walled carbon nanotube intramolecular heterojunction used in capacitors, optoelectronic devices, energy storage batteries, electrochemical sensors and other fields. ADVANTAGE - The method helps in preparing graphene nanoribbon/single-walled carbon nanotube intramolecular heterojunction, which has controllable melting degree and excellent performance; is simple; has low requirements on equipment, and is convenient for popularization and application.