Graphene oxide for electrochemical reduction and preparation method of graphene

Abstract

The invention belongs to the technical field of nano materials, and particularly relates to a graphene oxide for electrochemical reduction and a preparation method of graphene. The method comprises the following steps: dissolving graphite oxide in deionized water, and carrying out ultrasonic peeling to obtain a graphene oxide solution; cleaning electrodes and a glass container; adding the graphene oxide solution into the glass container; connecting one end of a copper conductor with cathode and anode materials, putting the electrodes into the graphene oxide solution, and respectively connecting the other end of the copper conductor with positive and negative poles of a direct-current stabilized voltage supply; switching on the direct-current stabilized voltage supply, wherein the voltage is controlled at 10-50V, and the temperature is controlled at 25-90 DEG C; and carrying out electrochemical reduction for 1-60 minutes, thereby obtaining the graphene. The graphene prepared by the method provided by the invention has the advantages of high quality; and the method is simple to operate, and has the advantages of low cost, high safety, no pollution, high-efficiency and the like.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a method for preparing graphene by electrochemically reducing graphene oxide. Background technique [0002] Graphene is a novel two-dimensional nanomaterial that has attracted widespread interest due to its unique properties and potential applications in capacitors, cell images, sensors, devices, drug delivery, and solar cells. Existing graphene preparation methods include mechanical exfoliation, epitaxial growth and chemical reduction. Among these methods, the yield of the mechanical exfoliation method is very low; the thickness of the graphene obtained by the epitaxial growth method is uneven, so its application is limited; the chemical reduction method generally uses a strong reducing agent such as hydrazine hydrate. Hydrazine is highly toxic and difficult to remove, causing personal injury, environmental pollution and equipment damage. Recently, in o...

AI Technical Summary

Problems solved by technology

However, these methods have brought some new problems. The thermal reduction method can effectively reduce graphene oxide by rapidly heating graphene oxide to 1100 °C in an inert gas, but this method requires high temperature conditions, and the equipment and environment The requirements are high; the photocatalytic reduction method is to reduce graphene oxide by ultraviolet light irradiation, but the thickness of the obtained graphene sheet is relatively thick, which will limit its performance and application

Images