Graphene, silver phosphate and titanium dioxide dual-functional composite and method for preparing same

Abstract

The invention discloses a graphene, silver phosphate and titanium dioxide dual-functional composite and a method for preparing the same, and belongs to fields of photocatalysis technology, biological antibiosis and water pollution control. The method includes steps of ultrasonically treating oxidized graphene in water to obtain oxidized graphene dispersion liquid; dissolving silver phosphate in deionized water, adding the deionized water with the silver phosphate into the oxidized graphene dispersion liquid under the condition of stirring, and then stirring the oxidized graphene dispersion liquid to obtain mixed solution A; ultrasonically dispersing P25 in deionized water to prepare dispersion liquid, dripping the P25 dispersion liquid into the mixed solution A under the condition of magnetic stirring, and then stirring the mixed solution A to obtain mixed precursor solution B; and dripping phosphate solution into the mixed precursor solution B, then continuing stirring the mixed precursor solution B, shifting the mixed precursor solution B into a hydrothermal reaction kettle to enable the mixed precursor solution B to react so as to obtain a product, cooling the product to the room temperature, centrifuging the product, then washing the product and performing vacuum drying for the product to obtain the composite. The prepared composite not only can quickly degrade organic pollutants with certain concentration when irradiated by visible light, but also has broad-spectrum and efficient bactericidal activity for various bacteria.

Description

technical field [0001] The invention relates to a graphene / silver phosphate / titanium dioxide bifunctional composite material and a preparation method thereof, in particular to a method for preparing a graphene / silver phosphate / titanium dioxide composite material by a hydrothermal method, which belongs to composite materials, photocatalytic technology, The field of biological antibacterial and water pollution control. Background technique [0002] With the acceleration of industrialization, the problem of water resources is becoming more and more serious. Water pollution has seriously affected people's quality of life, and has also had a greater impact on the implementation of my country's sustainable development strategy. In recent years, the use of photocatalytic technology to eliminate and degrade Pollutants are one of the most active research fields in current water environment governance. More and more photocatalytic materials are used in environmental protection, water ...

AI Technical Summary

Problems solved by technology

[0005] Although the composite photocatalyst prepared by the composite of graphene and titanium dioxide has shown excellent performance, it has received extensive attention from researchers. In order to further improve the graphene-based composite The photocatalytic performance of the material, and give full play to other performances, we can combine the characteristics of related materials, use the synergistic effect between the preparation technology of nanocomposites and different material functions, and prepare dual composites with excellent photocatalytic performance and efficient antibacterial and bactericidal activity. Functional composite materials. At present, graphene oxide with large specific surface area and good solubility and dispersion is used as the precursor, silver nitrate, phosphate and P25 are used as raw materials, and graphene / silver phosphate / titanium dioxide bifunctional composite materials are prepared in situ by hydrothermal method. And it has not been reported in the fields of photocatalytic degradation and antibacterial sterilization

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