MoSe2-TiO2 composites were successfully synthesized via a facile solvothermal method. Their morphology, structure and photocatalytic activity in the reduction of Cr(VI) were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, UV-vis absorption spectroscopy, X-ray photoelectron spectroscopy and electrochemical impedance spectra, respectively. The results show that the introduction of TiO2 into MoSe2 boosts the light harvesting efficiency and charge separation and transfer due to their synergistic effect, thus enhancing the visible light photocatalytic activity of MoSe2 with a maximum Cr(VI) reduction rate of 91% at 120 min compared with pure MoSe2 (61%) and TiO2 (5%). (C) 2016 Elsevier B.V. All rights reserved.