METHOD FOR IMPROVING ACTIVITY OF PHOTOCATALYST CONSISTING OF VISIBLE LIGHT RESPONSIVE METAL NITRIDE AND METAL OXYNITRIDE

摘要

PROBLEM TO BE SOLVED: To improve the activity of a photocatalyst consisting of a visible light responsive transition metal nitride and a transition metal oxynitride.;SOLUTION: The photocatalyst activity improving method comprises heating, in the presence of ammonia having a pressure higher than 0.2 MPa (mega Pascal) and at a temperature of 300°C or higher, the photocatalyst consisting of the transition metal nitride and the transition metal oxynitride containing at least one transition metal, especially the photocatalyst selected from LaTaON₂, MTaO₂N (M: an alkaline earth metal selected from Ca, Sr, and Ba), Ta₃N₅, TaON, LaTiO₂N, TiN_xO_yF_z, and MNbO₂N (M: an alkaline earth metal selected from Ca, Sr, and Ba).;COPYRIGHT: (C)2004,JPO&NCIPI