Preparation method and application of ZnIn2S4-graphene composited photochemical catalyst

Abstract

The invention discloses a preparation method and application of a ZnIn2S4-graphene composited photochemical catalyst. The preparation method comprises the following steps of: placing graphite oxide into a reducibility alcohol agent for ultrasonic dispersion; adding zinc sulfate and indium chloride into the reducibility alcohol agent, stirring and dissolving; adding thioacetamide into two systems after the two systems are mixed; transferring the mixed systems into a hydrothermal kettle for a reaction; and after the reaction is finished, carrying out vacuum filtration on the obtained product, washing, vacuumizing and grinding to obtain a nano ZnIn2S4-graphene composited photochemical catalyst. In the invention, grapheme is taken as a supporting material, and a solvothermal synthesis method is adopted to further prepare the nano ZnIn2S4-graphene composited photochemical catalyst. The catalyst prepared by using the method in the invention has the advantages of wide visible light responding range and high photocatalysis activity, can be used for transformation and use of solar energy and comprehensive ecological improvement, such as air purification, sewage disposal, hydrogen production through photodegradation, preparation of alcohol or hydrocarbon chemical fuels and the like by the photocatalysis and reduction of CO2.

Description

technical field [0001] The invention belongs to the technical field of new materials and their preparation, and relates to a visible light-responsive ZnIn 2 S 4 -Graphene composite photocatalyst and its preparation method and application. technical background [0002] With the rapid development of the economy, the problems of energy shortage and environmental pollution have become increasingly prominent. The application of photocatalytic technology as a green energy technology to environmental pollution has attracted widespread attention of scientists. New high-efficiency photocatalytic materials are one of the keys to the development and application of photocatalytic technology. However, most photocatalytic materials have a large bandgap, and the photocatalytic reaction requires high energy excitation. The photocatalytic reaction activity under visible light is not ideal. It is very important to develop photocatalytic materials with high visible light effect ability and p...

AI Technical Summary

Problems solved by technology

However, most photocatalytic materials have a large band gap, photocatalytic reactions require high energy excitation, and photocatalytic activity under visible light is not ideal. It is very important to develop photocatalytic materials with high-efficiency visible-light effect capabilities and photocatalytic efficiency. the meaning of

[0003] Ternary sulfide ZnIn 2 S 4 (Eg=2.3eV) has a narrow energy band gap and good chemical stability, and is considered to be an ideal visible light catalyst, but due to pure ZnIn 2 S 4 Larger particles are prone to agglomeration during the preparation process, thus reducing its surface area and reducing its adsorption performance. The photogenerated electrons and holes cannot be effectively separated, which limits its photocatalytic activity.

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