Electrochemical preparation method of graphene

Abstract

The invention discloses an electrochemical preparation method of graphene. The preparation method comprises the following steps: providing an electrode with the electrolysis action, and pretreating the electrode with the electrocatalysis action; dropping a graphene oxide solution onto the surface of the pretreated electrode with the electrocatalysis action, and drying to obtain a graphene oxide modified electrode; and soaking the graphene oxide modified electrode into a 10mmol / L-500mmol / L salt solution with the pH value of 7, regulating the potential of the electrode to be -1.2V to -2V and reacting for 1s to 1h, so as to obtain needed graphene. According to the electrochemical preparation method of the graphene, by matching the electrode with the electrocatalysis action with the salt solution with the pH value of 7 for use, the reduction action of graphene oxide can be activated with relatively low voltage, the neutral salt solution is green, simple to prepare, and low in price. Compared with a traditional electrochemical preparation method of the graphene, the electrochemical preparation method of the graphene is lower in preparation cost and difficulty.

Description

technical field [0001] The invention relates to an electrochemical preparation method of graphene. Background technique [0002] Graphene is a single-layer sheet structure composed of carbon atoms arranged in a honeycomb order. Graphene has excellent electrical, thermal and mechanical properties due to its unique structure, and is expected to be widely used in high-performance nanoelectronic devices, sensors, nanocomposites, batteries and supercapacitors, and field emission materials. Therefore, graphene, which only appeared in 2004, has rapidly become a research hotspot in physics, chemistry and materials science in recent years. [0003] The preparation of graphene is the basis of theoretical research and application research of graphene. At present, the electrochemical preparation methods of graphene mainly include mechanical exfoliation method, epitaxial growth method, chemical vapor deposition (CVD), chemical redox method, and liquid phase exfoliation method. Wait. A...

AI Technical Summary

Problems solved by technology

The chemical method has mild reaction conditions, is easy to control, is suitable for the large-scale preparation of graphene, and has strong advantages in subsequent processing. Many existing research works are also based on this method, but the chemical method is slow and efficient. Low, and it is necessary to add toxic substances such as hydrazine hydrate, sodium borohydride, hydroquinone, etc., while the electroreduction method is to obtain electrons from the oxygen-containing functional groups on the oxidized graphene to be reduced, no toxic chemical reagents are involved, and the preparation method Simple, easy to control the reaction process, low cost, no pollution, and the prepared graphene has no impurities and high quality. It is a simple, green and large-scale production method for graphene

[0004] At present, the traditional method of preparing graphene by electroreduction of graphene oxide often requires high voltage to activate the reduction reaction, and the preparation of cumbersome and corrosive acidic solution or buffer solution as electrolyte is required, and the preparation cost and difficulty are high.

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