A novel In2S3/TiO2 composite with visible-light photocatalytic activity was prepared by a chemical precipitation method and characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), scanning electron microscope and UV-vis diffuse reflectance spectroscopy. Under both UV- and visible-light irradiation, the In2S3/TiO2 composite shows good photocatalytic activity to degrade methyl orange, ascribed to the absorption of visible light by In2S3 sensitizer and enhanced separation of photoinduced electron-hole pairs in the composite semiconductors. (C) 2010 Elsevier B.V. All rights reserved.