Method for reducing graphene oxide by optical microwaves

Abstract

The invention provides a method for reducing graphene oxide by optical microwaves. The method can include the steps: placing graphene oxide into inert atmosphere; rapidly heating the graphene oxide toreach the temperature of 500 DEG C or more by the microwaves and optical wave irradiation, decomposing functional groups of the graphene oxide and decreasing the number of layers of the graphene oxide to obtain reduced graphene oxide. The microwaves can penetrate the graphene oxide in a traveling wave mode, the frequency of the microwaves is 300MHz-300GHz, and the frequency of optical waves is 3*1011-3.8*1014Hz. The method has the advantages that the graphene oxide is rapidly and uniformly heated by the optical microwaves, heat inertia is avoided, energy is saved, efficiency is high, reducingefficiency is high, and the graphene oxide can be selectively oxidized.

Description

technical field [0001] The invention relates to the field of reduction of graphene oxide, in particular to a method for reducing graphene oxide by light microwave. Background technique [0002] Graphene oxide is the product of chemical oxidation of graphite. It has a large number of functional groups such as hydroxyl, carboxyl, and epoxy groups on the surface, and has a high specific surface area. , photocatalysis have a wide range of applications. Due to the characteristics of graphene oxide, chemical reagent reduction (such as sodium borohydride, hydrogen iodide, ascorbic acid and other chemical reducing agents), high-temperature thermal reduction, and plasma methods are mostly used on the market. [0003] The existing graphene oxide reduction method has the following problems in the production process: First, the use of chemical reagents for reduction requires the use of a large amount of chemical reagents, which increases the by-products, increases the difficulty of sub...

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Problems solved by technology

[0003] The existing graphene oxide reduction method has the following problems in the production process: First, the use of chemical reagents for reduction requires the use of a large amount of chemical reagents, which increases the by-products, increases the difficulty of subsequent cleaning, and increases the risk of environmental protection, resulting in cost The second is to use high-temperature thermal reduction, the reduction temperature of graphene oxide is high, and the uniformity of product quality obtained by different reduction temperatures cannot be guaranteed, and it will also cause problems such as increased ash content of the product and serious corrosion of equipment; the third is to use other reduction method (such as plasma), the production technology is difficult, the cost will increase exponentially, and it cannot be applied on a large scale in industrialization

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