Acta Phys. -Chim. Sin. ›› 2017, Vol. 33 ›› Issue (7): 1492-1498.doi: 10.3866/PKU.WHXB201704141

• ARTICLE • Previous Articles    

Preparation of MoS2/TiO2 Composite Catalyst and Its Photocatalytic Hydrogen Production Activity under UV Irradiation

Chi ZHANG1,2,Zhi-Jiao WU2,Jian-Jun LIU1,*(),Ling-Yu PIAO2,*()   

  1. 1 State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China
    2 CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
  • Received:2017-01-16 Published:2017-05-31
  • Contact: Jian-Jun LIU,Ling-Yu PIAO E-mail:13611012376@163.com; ljj-717@163.com;piaoly@nanoctr.cn
  • Supported by:
    the Ministry of Science and Technology of China(2016YFA0200900);the Ministry of Science and Technology of China(2016YFF0203803)

Abstract:

To study the activity of a composite photocatalyst for photocatalytic hydrogen production, we prepared and loaded MoS2 nanosheets with TiO2 nanoparticles using a hydrothermal method, thus forming a MoS2/TiO2 heterojunction composite catalyst. The structural and optical properties of the catalyst were characterized and analyzed by field-emission scanning electron microscopy, high-resolution transmission electron microscopy, X-ray powder diffraction, UV-Vis absorption spectra, Raman spectroscopy, and X-ray photoelectron spectroscopy. The activity of the photocatalyst was evaluated by its photocatalytic hydrogen production rate. The corresponding MoS2 content of the catalyst was found to be 30%, and upon the exposure to 365nm UV light, a high photocatalytic hydrogen production rate of 1004 μmol-1·h-1·g-1 was obtained. The catalytic rate is much greater than that obtained with MoS2 or TiO2 catalysts. The high hydrogen production rate indicated that the use of a MoS2/TiO2 composite catalyst can significantly improve the UV-induced photocatalytic hydrogen production performance. Because of the excellent photocatalytic hydrogen production performance of the MoS2/TiO2 composite, we studied and analyzed the hydrogen production mechanism.

Key words: TiO2, MoS2, Composite structure, Heterojunction, Photocatalytic hydrogen production

MSC2000: 

  • O649