A preparation method of graphene nanoribbon/single-walled carbon nanotube intramolecular heterojunction

Abstract

The invention discloses a method for preparing a graphene nanobelt / single-walled carbon nanotube intramolecular heterojunction, belonging to the technical field of carbon nanomaterials. The preparation method comprises the following steps: (1) adding single-walled carbon nanotubes and dopamine hydrochloride to Tris-HCl buffer solution, placing them in a dark environment for reaction, and filtering to obtain polydopamine-modified single-walled carbon nanotubes (2) disperse the polydopamine-modified single-walled carbon nanotubes prepared in step (1) in concentrated sulfuric acid, add phosphoric acid, heat up, add potassium permanganate, cool to room temperature after the reaction is completed, add hydrogen peroxide, filter, Washing to neutrality to obtain unzipped single-walled carbon nanotubes; (3) roasting the unzipped single-walled carbon nanotubes obtained in step (2), ultrasonically treating the roasted product with hydrochloric acid solution, filtering, and adding hydrogen iodide solution for reduction reacting, filtering after reacting, and preparing graphene nanoribbons / single-walled carbon nanotube intramolecular heterojunctions.

Description

technical field [0001] The invention relates to the technical field of carbon nanomaterials, in particular to a method for preparing a graphene nanobelt / single-walled carbon nanotube intramolecular heterojunction. Background technique [0002] With the development of miniaturization of electronic devices, silicon-based semiconductor devices are approaching their material and physical limits. Carbon-based molecular devices are gradually considered to be the best candidates to replace silicon-based electronic devices. New carbon-based materials such as graphene and carbon nanotubes are becoming the main force in the manufacture of next-generation new electronic device materials due to their excellent physical properties. In recent years, more and more attention has been paid to the composite material of graphene and carbon nanotubes, because it not only has various excellent properties of graphene and carbon nanotubes, but also exhibits excellent properties that graphene and ...

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Problems solved by technology

Among them, the plasma etching and unzipping carbon nanotube method, the electrochemical etching unzipping carbon nanotube method and the transition metal catalyzed unzipping carbon nanotube method have complex steps and high requirements for equipment; the intercalation stripping unzipping carbon nanotube method, chemical Although the erosion-melting carbon nanotube method and the sonochemical melting carbon nanotube method do not require high equipment, the prepared GNR has various disadvantages, such as the intercalation exfoliation melting carbon nanotube method and the chemical erosion melting carbon nanotube method. It will destroy the structure of GNR, resulting in a decrease in its electrical properties. Although the GNR prepared by sonochemically melting carbon nanotubes has high performance, the yield is extremely low, only about 2%; and in the current preparation method, only transition Metal-catalyzed unzipping of carbon nanotubes can control the degree of unzipping of carbon nanotubes