Synthesis and characterization of Cu 2Se prepared by hydrothermal co-reduction

Abstract

Cu 2Se compounds were synthesized by hydrothermal co-reduction at 150–200 °C from CuSO 4·5H 2O and SeO 2 in deionized water. The products were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and field emission scanning electron microscope (FESEM). Experimental results show that, the product powders with Cu 2Se phase obtained at 180 and 200 °C almost consist of regular hexagonal flakes which grow along (1 1 1) crystal plane. The side lengths between 100 and 200 nm of hexagonal flakes synthesized at 180 °C are much smaller than those of the product with 1.3–2 μm side length at 200 °C.