Aiming to enhance the use of solar energy, novel SeO2/TiO2 nanocomposite was prepared by water bathing and calcining. Based on the characteristic of SeO2 and TiO2, the work mechanism of the nanocomposite was discussed. The products as obtained were characterized by SEM, HRTEM, EDX, XRD, XPS, LRS and UV-vis. The results shown that the SeO2/TiO2 nanocomposite is a hopeful form for improving the practicability of TiO2. (C) 2007 Elsevier B.V. All rights reserved.