Method for preparing titanium dioxides doped with nitrogen and photocatalyst prepared thereby

摘要

The present invention provides a method for producing a nitrogen-doped titanium dioxide photocatalyst, comprising the step of synthesizing a photocatalyst by heating a mixture containing titanium dioxide and a reducing agent to a high temperature under a nitrogen atmosphere. According to the method for producing a titanium dioxide photocatalyst according to the present invention, the titanium dioxide coated with a reducing agent is heated at a low temperature of 900 ° C or lower in a nitrogen atmosphere, and a titanium dioxide photocatalyst having excellent photocatalytic activity in visible light and ultraviolet light Can be produced. In addition, the titanium dioxide photocatalyst prepared by the above method has an average particle size of several tens of nanometers, has a large specific surface area, exhibits excellent photocatalytic activity in visible light and ultraviolet light, and can be effectively used in various fields. Particularly, when the photocatalyst is used as a raw material for ceramics, it is possible to effectively decompose harmful substances contained in the atmosphere near the area where the produced ceramics are located.