Effect of co-doping and tri-doping with transition metals and a nonmetal on photocatalytic activity in visible light of TiO2 thin film

• Published in: Journal of the Korean Physical Society 2017, 70(11), , pp.995-1000
• Main Authors: Phung, Hang Nguyen Thai, Tran, Van Nguyen Khanh, Duong, Phuong Ai, Le, Hung Vu Tuan, Truong, Nguyen Duc
• Format: Article
• Language: English
• Subjects: Absorption; Anatase; Catalytic activity; Crystal structure; Degradation; Dopants; Doping; Mathematical and Computational Physics; Methylene blue; Nitrogen; Particle and Nuclear Physics; Phase shift; Phase transitions; Photocatalysis; Physics; Physics and Astronomy; Sol-gel processes; Theoretical; Thin films; Titanium dioxide; Titanium oxides; Transition metals; Vanadium; X-ray diffraction; 물리학
• ISSN: 0374-4884; 1976-8524
• DOI: 10.3938/jkps.70.995

Mono, co- and tri-doped TiO 2 thin films with the transition metals (vanadium and/or chrominium) and a nonmetal (nitrogen) have been fabricated by sol-gel method. X-ray diffraction results clearly reveal anatase crystal structure for all obtained samples and doping with any dopants doesn’t change the anatase phase of TiO 2 . Compared to TiO 2 , three types of doped TiO 2 thin films exhibit a red-shift in the absorption edge and have much better photocatalytic properties for methylene blue degradation in visible light region. The maximum visible-photocatalytic performance was achieved for tri-doped TiO 2 sample. The mechanism for enhancing visible-photocatalytic activity of co-doped and tri-doped TiO 2 thin films was also examined.