Preparation method of cubic cuprous oxide/graphene nanocomposite

Abstract

The invention discloses a preparation method of a cubic cuprous oxide / graphene nanocomposite with efficient photocatalysis capability. According to the method, the composite can be prepared with a simple one-pot reduction method. Firstly, graphene oxide is prepared with an improved Hummers method, copper sulfate pentahydrate and graphene oxide are ultrasonically dispersed in water and mechanically stirred in a water bath at the temperature of 50-60 DEG C to be uniformly mixed, a sodium hydroxide solution is dropwise added to the mixture, copper hydroxide precipitates are formed, then, a glucose solution is added, the mixture reacts for 2-3 h, sufficient reduction is performed, centrifugation, washing and drying are performed, and a cubic cuprous oxide / graphene photocatalyst with the efficient photocatalysis capability is obtained. The process is simple, the cost is low, the product has uniform morphology, and the cubic cuprous oxide / graphene nanocomposite has excellent capability of photocatalytic degradation of organic dye under the visible light and has great application potential in environmental governance and solar energy utilization.

Description

technical field [0001] The invention relates to a method for preparing a nanocomposite photocatalytic material, in particular to a method for preparing a cubic cuprous oxide / graphene nanocomposite material, and belongs to the field of preparation of nanometer visible photocatalytic materials. Background technique [0002] Cuprous oxide is a typical narrow-bandgap P-type semiconductor. Its bandgap is between 2.0 and 2.4eV, and it can be excited by most of the visible light. Therefore, it has a wide range of applications in the field of visible light photocatalysis. At the same time, compared with other narrow-bandgap semiconductors (such as metal sulfides), cuprous oxide is an ideal semiconductor for water splitting and degradation of dye pollutants under visible light due to its low toxicity, low cost, and ability to be widely prepared in large quantities. However, due to the rapid recombination of photogenerated electrons and holes, the photocatalytic ability of cuprous oxi...

AI Technical Summary

Problems solved by technology

[0005] The existing research has great defects in the synthesis of this composite product. First, the preparation method is complicated and cumbersome. The high temperature hydrothermal reaction and long-term stirring all make the reaction conditions harsh and the cost is high. On the other hand, the morphology of the composite product is not good. The cuprous oxide of the composite product is mostly presented in an irregular spherical and porous structure, which makes its photocatalytic performance not high, and its adsorption capacity is much higher than its degradation ability.

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