In-situ preparation method for cubic copper oxide/graphene aerogel composite material

Abstract

The invention discloses an in-situ preparation method for a cubic copper oxide / graphene aerogel composite material. The method comprises the following steps of: S1) putting a copper net into 1-3M hydrochloric acid, absolute ethyl alcohol and deionized water in turn, performing ultrasonic cleaning and then drying; S2) dispersing graphene oxide into the deionized water and ultrasonically treating for 1-3 hours, thereby acquiring a graphene oxide dispersion liquid in the concentration of 1-5mg mL-1; S3) pouring the graphene oxide dispersion liquid acquired in the step S2) into an autoclave liner, putting the copper net acquired in the step S1) into the autoclave liner and performing hydrothermal reaction, wherein the temperature of the hydrothermal reaction is at 120-200 DEG C and the reaction time is 6-15h; and S4) taking out the product acquired from the step S3), quenching and performing freeze drying, thereby acquiring the copper oxide / graphene aerogel composite material, wherein the freeze drying time is 12-48h, the freeze drying temperature is at -30 to -50 DEG C and the vacuum degree is at 10-30Pa.

Description

Technical field [0001] The invention relates to the field of transition metal oxide-carbon nano materials, in particular to an in-situ preparation method of cubic copper oxide / graphene aerogel composite material. 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 applied to photoelectric devices, photoelectric catalysis, energy storage and conversion, and various sensors. It is environmentally friendly and chemical Stable performance, high efficiency, low cost and other advantages. As a two-dimensional nanomaterial, graphene has the advantages of good dispersibility, high electron mobility, non-toxicity, and large specific surface area. Graphene is obtained by reducing graphene oxide prepared by the Hummers method. The advantage of this method is that the reaction process is relatively mild, has a higher yield than methods such as chemical vapor deposition, and the preparation co...

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Problems solved by technology

[0005] The existing research has many weaknesses in the preparation of this composite product. First, the synthesis method is tedious and complicated. The addition / removal of templates and long-time stirring all make the reaction conditions harsh, and chemicals must be added. It not only pollutes the environment but also increases the cost of synthetic products; on the other hand, the appearance of the composite product is not good, and the copper oxide of the composite product is mostly presented as irregular particle powder, which makes its electrochemical energy storage performance and photocatalytic The activity improvement is not high, and the recovery and reuse of powder catalysts is another problem

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