Synthesis and Characterization of MoS2/Graphene-TiO2 Ternary Photocatalysts for High-Efficiency Hydrogen Production under Visible Light

Ternary MoS 2 /graphene (G)-TiO 2 photocatalysts were prepared by a simple hydrothermal method.The morphology, phase structure, band gap, and catalytic properties of the prepared samples were investigated by X-ray diffraction, Raman spectroscopy, scanning electron microscopy, UV-vis spectrophotometry, and Brunauer-Emmett-Teller surface area measurement.The H 2 production efficiency of the prepared catalysts was tested in methanol-water mixture under visible light.MoS 2 /G-TiO 2 exhibited the highest activity for photocatalytic H 2 production.For 5 wt.% and 1 wt.%MoS 2 and graphene (5MT-1G), the production rate of H 2 was as high as 1989 µmol 1 h 1 .The catalyst 5MT-1G showed H 2 production activity that was ~11.3, 5.6, and 4.1 times higher than those of pure TiO 2 , 1GT, and 5MT, respectively.The unique structure and morphology of the MoS 2 /G-TiO 2 photocatalyst contributed to its improved hydrogen production efficiency under visible light.