Journal of Inorganic Materials ›› 2016, Vol. 31 ›› Issue (11): 1237-1241.DOI: 10.15541/jim20160107

• Orginal Article • Previous Articles     Next Articles

Photoelectrochemical Properties of MoS2 Modified TiO2 Nanotube Arrays

YU Lian-Qing1, HUANG Cheng-Xing1, ZHANG Ya-Ping1, DONG Kai-Tuo1, HAO Lan-Zhong1   

  1. (College of Science, China University of Petroleum, Qingdao 266580, China)
  • Received:2016-03-01 Revised:2016-06-13 Published:2016-11-10 Online:2016-10-25
  • Supported by:
    National Natural Science Foundation of China (21476262);Technology Project of Qingdao (14-2-4-108-jch);Fundamental Research Funds for the Central Universities (15CX05032A, 14CX05038A)


Well aligned TiO2 nanotube arrays were grown by anodization method on Ti foils in ethylene glycol electrolyte. Flowers-like molybdenum disulfide composed with nanoflakes was synthesized by hydrothermal process on TiO2 nanotube arrays, using sodium molybdate, thiourea and L-Cysteine as reactants. The obtained samples were analyzed by X-ray diffraction (XRD) and scanning electron microscope (SEM) equipped with energy dispersive X-ray detector. Linear sweeps voltammetry, electrochemical impedance spectroscopy and Mott-Schottky plots of samples were analyzed by electrochemical workstation. The results showed that a flowers-like MoS2 with diameter of c.a. 200 nm was synthesized, forming a heterojunction between TiO2 nanotube arrays and MoS2, which can effectively promote the separation of photogenerated charges, reduce the electron-hole recombination. Optimum concentration of sodium molybdate was obtained at 0.8 mmol/L, its corresponding photoconversion efficiency reached 1.65%, which was 2.89 times as high as that of pure TiO2, and the charge transfer resistance decreased approximately 50%. The MoS2/TiO2 composite exhibited high carrier density of 3.38×1023 cm-3, which was about 24 times higher than that of pure TiO2 nanotube arrays.

Key words: anodization, TiO2 nanotube arrays, molybdenum disulfide, hydrothermal method

CLC Number: