Preparation and application methods of high-efficiency composite photocatalytic material

Abstract

The invention relates to preparation and application methods of a high-efficiency composite photocatalytic material MoS2 / SrTiO3. The photocatalytic material is formed by compounding strontium titanate and molybdenum disulfide through a secondary hydrothermal method. The preparation method comprises the following steps: mixing isopropyl carbonate and citric acid, respectively dropwise adding a strontium nitrate solution and a sodium hydroxide solution under ultrasonic stirring conditions to obtain a precursor, heating the obtained precursor in a hydrothermal kettle, and washing and drying a product, thereby obtaining nano strontium titanate; fully mixing strontium titanate with a molybdenum disulfide precursor solution, heating in the hydrothermal kettle, and washing and drying a product, thereby obtaining the photocatalytic material MoS2 / SrTiO3. The photocatalytic material is simple in preparation method, does not need high-temperature calcining, is low in cost and recyclable, is capable of efficiently degrading methyl orange or organic dyestuffs with similar developing groups with the methyl orange, and has wide application prospects in the field of treatment of wastewater containing the organic dyestuffs.

Description

technical field [0001] The invention relates to the preparation and application of a high-efficiency composite photocatalytic material, especially a kind of MoS for degrading organic dyes 2 / SrTiO 3 A preparation method of a high-efficiency composite photocatalytic material and its effective degradation of methyl orange dye or an organic dye having a similar chromogenic group to methyl orange under ultraviolet light conditions. Background technique [0002] In recent years, wastewater discharged from textile, paint, printing, daily necessities and other chemical factories has become one of the most concerned environmental problems. These wastewaters contain a large number of organic dye molecules, which not only pollute and destroy the ecological environment, but also contain toxic aromatic hydrocarbons. The product is carcinogenic to humans. The content of organic dyes in this kind of wastewater is high, and the molecular stability of synthetic organic dyes is strong. Tra...

AI Technical Summary

Problems solved by technology

For example, in CN103920482A, zirconium-doped perovskite-type photocatalysts are used to improve photocatalytic performance, but this method requires high-temperature calcination and the material is not cheap; in CN102974378A, low-energy nitrogen ion beams are used to bombard strontium titanate wafers to prepare nitrogen-doped titanate Strontium photocatalyst, this method has considerable visible light catalysis and enhanced ultraviolet photocatalysis, but it needs to be supplemented by high temperature heating, and the required equipment is complicated;