PHOTOCATALYST CONTAINING CARBON NITRIDE, METHOD FOR PRODUCING SAME, AND AIR PURIFICATION METHOD USING THE PHOTOCATALYST

摘要

Disclosed is a photocatalyst which is responsive to visible light and can be obtained at lower cost than conventional photocatalysts by a safe method. Also disclosed is a method for producing the photocatalyst. The photocatalyst which is responsive to visible light is characterized by containing, as an active ingredient, a powder that is obtained by subjecting a graphite-like carbon nitride powder to an alkali treatment or an acid treatment. The alkali treatment or acid treatment is preferably a heat treatment that is carried out in an alkaline aqueous solution or an acidic aqueous solution. A visible light-responsive photocatalyst obtained by the method has a specific surface area of not less than 20 m²/g and significantly improved photoactivity.