Method for preparing ferromagnetic titania cobalt-doped photocatalysis material

Abstract

The invention discloses a preparation method of a ferromagnetic titanium oxide-doped cobalt photocatalyst material. A Ti1-xCoxO2 (x=0-15%) photocatalytic material with room temperature ferromagnetism was prepared. The method was as follows: butyl titanate and cobalt acetate were used as precursors and dissolved in a mixed solution of absolute ethanol and acetone, respectively. , prepared into butyl titanate solution and cobalt acetate solution, using nitric acid as a stabilizer, citric acid as a complexing agent, polyethylene glycol 2000 as a dispersant, respectively added to the butyl titanate solution, after fully stirring, the two The solution was mixed, stirred, and left to age to obtain a transparent and uniform sol. The sol is dried and heat-treated to obtain the required ferromagnetic titanium oxide-doped cobalt photocatalytic material. The material is chemically introduced into TiO2 without changing the anatase phase structure, so that it has obvious ferromagnetism at room temperature, and its photocatalytic performance is significantly improved under the action of an external magnetic field.

Description

technical field [0001] The invention relates to a method for preparing a ferromagnetic titanium oxide-doped cobalt photocatalytic material. The obtained material has obvious room temperature ferromagnetism and visible light catalytic performance, and its photocatalytic performance is obviously improved under an external magnetic field. Background technique [0002] The modern information industry mainly uses the degree of freedom of electrons in semiconductor devices to process and transmit information, and storage devices such as magnetic tapes, hard disks, and magneto-optical disks use the degree of freedom of electrons to store information. How to combine these two properties to explore new functional materials and further enhance the performance of semiconductor and magnetic devices will be the goal of the next development. The main reason why the spin of carriers in traditional semiconductor materials is not fully utilized is that most of the materials used in the infor...

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Problems solved by technology

[0006] On the other hand, TiO2 is a very promising photocatalytic material. Some scholars have also studied the effect of Co doping on the photocatalytic efficiency of TiO2, such as J.Wang, Dana Dvoranová and other research groups, but they mainly studied the effect of Co doping The effect of impurities on the bandgap structure of TiO2, but there is little research on the photocatalytic performance of magnetic field on Co-doped TiO2 materials

On the other hand, dilute magnetic semiconductors have strongly spin-dependent optical and transport properties, such as the giant Zeeman’s giant spin-splitting of electrons and holes caused by sp-d exchange interactions between carriers and magnetic ions. Effect, etc., theoretically, the energy band structure and carrier mobility of the material will change, which will affect its photocatalytic performance.

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