Imaging Science and Photochemistry ›› 2018, Vol. 36 ›› Issue (4): 331-339.DOI: 10.7517/j.issn.1674-0475.180107

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One-step Synthesis of Composited MoS2/TiO2 Nanotube Arrays and Its Photoelectrochemical Properties

LI Yue, LI Hongying, CHANG Yuxue, ZHOU Hongyan, YU Xiang   

  1. Department of Material and Chemistry Engineering, Henan University of Engineering, Zhengzhou 450007, Henan, P. R. China
  • Received:2018-01-19 Revised:2018-02-05 Online:2018-07-15 Published:2018-07-15

Abstract: In this paper, MoS2 nanoparticles were successfully deposited on TiO2 nanotube arrays by anodic oxidation method and cyclic voltammetry method, obtaining MoS2/TiO2 composited nanotubes. Compared with the unmodified TiO2 nanotube arrays, the photoelectrochemical properties and photocatalytic propeties of the composited MoS2/TiO2 nanotube arrays have been significantly improved. The results of photocurrent experiments showed that the photocurrent density of MoS2/TiO2 composited nanotubes is the highest (0.35 mA/cm2) when the deposition number of MoS2 cycles is 30 cycles, which is 3.88 times as much as the unmodified TiO2 (0.09 mA/cm2). The MoS2/TiO2 composited nanotubes exhibited improved photocatalytic degradation efficiency than that of unmodified TiO2 by comparison tests of photocatalytic degradation of 4-nitrophenol. The enhanced photoelectrochemical and photocatalytic activity is attributed to the enhanced visible absorption capacity, as well as the faster migration rate of electrons and holes on the MoS2/TiO2 composited nanotubes.

Key words: TiO2, MoS2, heterojunction, photoelectrochemical property, photocatalysis