Nanostructured Bi2Se3 and Sn0.5-Bi2Se3 were successfully synthesized by hydrothermal coreduction from SnCl2H2O and the oxides of Bi and Se. The products were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and field emission scanning electron microscope (FESEM). Bi2Se3 powders obtained at 180℃ and 150℃ consist of hexagonal flakes of 50-150 nm in side length and nanorods of 30-100 nm in diameter and more than 1μm in length. The product obtained at 120℃ is composed of thin irregular nanosheets with a size of 100-200 nm and several nanometers in thickness. The major phase of Sn0.5-Bi2Se3 synthesized at 180℃ is similar to that of Bi2Se3. Sn0.5-Bi2Se3 powders are primarily nanorod structures, but small amount of powders demonstrate irregular morphologies.