| abstract |
(57) [Problem] A method for easily producing an anatase type visible light reactive titanium oxide, which does not require a high-temperature heat treatment at all, The present invention provides a method for removing titanium oxide and a contaminant which is produced by this method and has an excellent effect of removing (reducing) contaminants. SOLUTION: This visible light reactive titanium oxide is an anatase type titanium oxide which is sensitive to visible light. W element may be included. It can be decomposed by contact with contaminants such as ammonia under the light of a fluorescent lamp. This titanium oxide hydrolyzes a solution containing titanium alkoxide, an organic solvent and an acid, and then converts the obtained gel to 150 ° C. or lower (particularly 15 to 120 ° C.). C) and dried. By bringing the oxide and the contaminant into contact with each other under visible light (such as a fluorescent lamp), the contaminant (ammonia, nitrogen oxide, formaldehyde, etc.) can be decomposed. |