Enhanced Photocurrent and Photocatalytic Degradation of Methyl Orange by V-N Codoped TiO2 Nanotube Arrays Cooperated with H2O2. Issue 8 (1st January 2015)

• Record Type: Journal Article
• Authors: Zhang, Min; Lu, Dandan; Zhang, Zhihua; Guo, Yanru; Yang, Jianjun
• Is Part Of: Journal of the Electrochemical Society. Volume 162:Issue 8(2015)
• Page Start: H557
• Page End: H563
• Publication Date: 2015-01-01
• Subjects: co-doping -- nanotube -- photocatalytic -- TiO2; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0901508jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : To extend the photo response of TiO2 further into the visible light region, TiO2 nanotube arrays codoped with vanadium and nitrogen were synthesized by anodization process, followed by impregnation and calcination process. X-ray photoelectron spectroscopy (XPS) revealed the existence of interstitial N and V (V 4+ and V 5+ ) in V, N codoped TiO2 catalysts, which was beneficial to narrow the bandgap and separating charges. Higher photocurrent density displayed by the V, N codoped TiO2 nanotube arrays showed that more photo-induced electrons were generated, therefore effectively improved the catalytic activity. V, N codoped samples were used for the photodegradation of methyl orange (MO) in aqueous solution in presence of H2 O2 . H2 O2 is used to serve as an electron scavenger and a precursor for OH radicals, thus significantly accelerating the photodegradation of MO under visible light irradiation. A synergistic effect between V, N codoped TiO2 catalyst and H2 O2 contributed to the high degradation activity toward MO.