MoSe2 modified TiO2 nanotube arrays with superior photoelectrochemical performance. (11th April 2018)

• Record Type: Journal Article
• Authors: Zhang, Yaping; Zhu, Haifeng; Yu, Lianqing; He, Jiandong; Huang, Chengxing
• Is Part Of: Materials research express. Volume 5:Number 4(2018)
• Publication Date: 2018-04-11
• Subjects: TiO2 nanotube arrays -- p-n heterojunction -- electrochemical deposition -- Molybdenum selenide; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/aab90c
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: TiO2 nanotube arrays (TNTs) are first prepared by anodization Ti foils in ethylene glycol electrolyte. Then, MoSe2 deposites electrochemically on TNTs. The as-synthesized MoSe2 /TiO2 composite has a much higher photocurrent density of 1.07 mA cm −2 at 0 V than pure TNTs of 0.38 mA cm −2, which suggests that the MoSe2 /TiO2 composite film has optimum photoelectrocatalysis properties. The electron transport resistances of the MoSe2 /TiO2 decreases to half of pure TiO2, at 295.6 ohm/cm 2 . Both photocurrent-time and Mott-Schottky plots indicate MoSe2 a p-type semiconductor characteristics. MoSe2 /TiO2 composite can achieve a maximum 5 orders of magnitude enhancement in carrier density (4.650 × 10 27 cm −3 ) than that of pure TiO2 arrays. It can be attributed to p-n heterojunction formed between MoSe2 and TiO2, and the composite can be potentially applied in photoelectrochemical, photocatalysis fields.