MoS2/TiO2/Si pyramid array photoelectric catalyst and preparation method thereof

Abstract

The invention discloses a MoS2 / TiO2 / Si pyramid array photoelectric catalyst. The MoS2 / TiO2 / Si pyramid array photoelectric catalyst is composed of MoS2 nanoparticles, a TiO2 film and a silicon pyramid array. The invention has the following beneficial effects: the pyramid array structure enhances the scattering probability of incident light, and can improve the absorption efficiency of the catalyst substrate to visible light; a layer of TiO2 film is plated through magnetron sputtering, so that a compact protection layer can be formed on the surface of the silicon pyramid array, chemical corrosion of silicon in the photoelectrocatalysis process is effectively prevented, and the chemical stability of the silicon is improved; MoS2 nanoparticles are loaded on the surface of a silicon pyramid array through hydrothermal, spin-coating and calcining methods, and the MoS2 nanoparticles are used as a cocatalyst, so that a large number of reaction active sites can be provided, and the efficiency of photoelectrocatalytic degradation of organic pollutants can be effectively improved; and the MoS2 / TiO2 / Si pyramid array photoelectric catalyst is a blocky solid catalyst, and compared with a traditional powder catalyst, the MoS2 / TiO2 / Si pyramid array photoelectric catalyst is easier to recycle.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, specifically a MoS 2 / TiO 2 / Si pyramid array photocatalyst and preparation method. Background technique [0002] Nowadays, in the fields of medical treatment and animal husbandry, a large amount of sewage discharge gradually affects people's daily life. While calling for the reduction of sewage discharge, human beings also take corresponding measures to treat sewage, such as through adsorption, filtration, photoelectric catalysis and other treatment methods . Physical methods such as adsorption and filtration have complex and cumbersome treatment processes, and the treatment results are not satisfactory. They may also cause secondary pollution to the environment due to improper treatment. Chemical methods such as photoelectric catalysis have attracted widespread attention due to their advantages such as simple treatment process and environmental friendliness. . [0003] However, since ...

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Problems solved by technology

Physical methods such as adsorption and filtration have complex and cumbersome treatment processes, and the treatment results are not satisfactory. They may also cause secondary pollution to the environment due to improper treatment. Chemical methods such as photoelectric catalysis have attracted widespread attention due to their advantages such as simple treatment process and environmental friendliness.

[0003] However, since most photocatalysts are in the form of powder particles, it is difficult to recycle and reuse them in the catalytic process, which is not conducive to the recycling of catalysts, and may cause secondary pollution of the water environment.

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