Hydrothermal preparation method of flaky nano copper oxide/graphene composite materials

Abstract

The invention discloses a hydrothermal preparation method of flaky nano copper oxide / graphene composite materials. Copper acetate monohydrate with different mass is dissolved in deionized water, graphene oxide solutions are added to the solutions, the solutions are stirred magnetically, then sodium hydroxide is dissolved in deionized water, the mixtures are dropwise added to copper acetate monohydrate and graphene oxide mixed solutions stirred previously, the mixtures are stirred magnetically for 1 h and then subjected to hydrothermal treatment for 10 h, after the reaction ends and products are cooled to the normal temperature, the products are washed repeatedly with deionized water and then placed in a vacuum drying oven to be dried at the temperature of 60 DEG C, and flaky nano copper oxide / graphene composite material powder containing copper oxide and graphene in different mass ratios is obtained after drying. Flaky nano copper oxide / graphene composite material samples prepared with the hydrothermal method have the characteristics of good crystallinity, high uniformity, flaky microstructures and the like, and the composite materials can increase reaction rates of light-catalyzed reactions.

Description

technical field [0001] The invention relates to a preparation method for realizing nano-copper oxide / graphene composite material, which belongs to the field of composite material preparation. Background technique [0002] As a semiconductor metal oxide, copper oxide has a band gap of 1.7 electron volts and can absorb visible light. It can be used in photoelectric devices, photoelectrocatalysis, energy storage and conversion, various sensors, and environmental applications. It has low toxicity. , stability, high efficiency, low cost and other advantages. As a two-dimensional nanomaterial, graphene has the advantages of good dispersion, high electron mobility, non-toxicity, and large specific surface area. Graphene is obtained by reducing graphene oxide prepared by the hummers method. The advantage is that the reaction process is relatively mild, and compared with chemical vapor deposition and other methods, it has higher yield and relatively lower preparation cost. There ar...

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Problems solved by technology

The high-temperature solid-phase method refers to a method in which products are formed through contact, reaction, nucleation, and crystal growth reactions between solid interfaces at high temperatures. It has the characteristics of low cost, large output, and simple preparation process; its disadvantages include high energy consumption , the sample is easy to agglomerate, and it is easy to mix impurities in the reaction process, etc.

The process of the sol-gel method is to dissolve the ester compound or metal alkoxide in an organic solvent to form a uniform solution, then add other components, react at a certain temperature to form a gel, and finally make a sample by drying. The advantage is that the reaction steps are simple, the uniformity is good, and the temperature required for the reaction is low; the disadvantage is that the raw materials for the reaction are expensive and some are toxic, and the reaction time is longer

The chemical precipitation method refers to the use of a precipitant to precipitate the sample in a solution state, and then dry or roast the sample to obtain the corresponding sample. The advantage is that the instrument used in the reaction is simple and suitable for large-scale sample preparation. The disadvantage is that the sample Difficult to control quality, low uniformity, etc.

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