A facile method to the cube-like MnSe2 microcrystallines via a hydrothermal process

A convenient hydrothermal process was applied to prepare the cube-like MnSe2 microcrystallines through the reaction of MnSO4.H2O with Se and (NaH2PO2H2O)-H-. in aqueous solution at 160 degrees C for 12 h. Powder X-ray diffraction (XRD) analysis confirmed that the product was the cubic phase of MnSe2 with cell parameter a=6.440 angstrom. The chemical composition of the MnSe2 was determined by XPS. The Raman spectrum of MnSe2 presented the peaks of the Se-Se stretching mode at 232.44 and 266.58 cm(-1). The images of scanning electron microscope (SEM) and transmission electron microscope (TEM) showed the cube-like morphology of the product with the edge length ranging from 20 to 30 mu m. The formation mechanism of the MnSe2 microcrystallines was discussed as well. (c) 2006 Elsevier Ltd. All rights reserved.