Preparation method of graphene nanobelt/single-walled carbon nanotube intramolecular heterojunction

Abstract

The invention discloses a preparation method of a graphene nanobelt / single-walled carbon nanotube intramolecular heterojunction, and belongs to the technical field of carbon nanomaterials. The preparation method comprises the following steps of: (1) adding single-walled carbon nanotubes and dopamine hydrochloride into a Tris-HCl buffer solution, reacting in a dark environment, and filtering to obtain polydopamine modified single-walled carbon nanotubes; (2) dispersing the polydopamine modified single-walled carbon nanotubes prepared in the step (1) in concentrated sulfuric acid, adding phosphoric acid, heating, adding potassium permanganate, cooling to room temperature after the reaction is completed, adding hydrogen peroxide, filtering, and washing the solution to be neutral to obtain unlinked single-walled carbon nanotubes; and (3) roasting the unlinked single-walled carbon nanotubes obtained in the step (2), carrying out ultrasonic treatment on the roasting product by using a hydrochloric acid solution, filtering, adding a hydrogen iodide solution to carry out a reduction reaction, and filtering after the reaction to obtain the graphene nanobelt / single-walled carbon nanotube intramolecular heterojunction.

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