[16a-2H-1~13] 6.3 Oxide electronics

[16a-2H-13] Characterization and Photocatalytic Activities of SrTi_1−XCo_XO₃ Thin Films Prepared by Liquid State Pulsed Laser Ablation.

〇Fumihiko Ichihara¹, Murata Yuma¹, Ono Hiroshi¹, Cheow-keong Choo², Tanaka Katsumi¹ (1.Department of Engineering Science, UEC, 2.Center for International Programs and Exchange, UEC)

Keywords:Photocatalysis,XPS,Oxgen Deffect

Co doped SrTiO₃ thin films that contain oxygen defects were prepared liquid state PLA method and H₂ annealing. Doping of transition metal cation to SrTiO₃, a photocatalyst for methylene blue decomposition under visble light irradiation, was examined for the control of defect structure as well as photocatalysis. Doping Co with oxygen defects effectively enhance photocatalytic activity. Co makes oxygen defects stable state without Ti³⁺. XPS spectra showsCo³⁺/Co⁴⁺ ratio increase as H₂ anneal temperature increase. It was demonstrated that cation with valence lower than that of the parent cation intentionally introduce oxygen defects and decrease Ti³⁺ is effective to photocatalytic activity.