Crystallized Zn3(OH)2V2O7•nH2O: Hydrothermal synthesis and magnetic property

Well-crystallized zinc vanadium oxide hydroxide hydrate Zn-3(OH)(2)V2O7 center dot nH(2)O nanobelts were successfully synthesized by a simple hydrothermal method. X-ray diffraction patterns of the samples are in agreement with the standard pattern of the hexagonal Zn-3(OH)(2)V2O7 center dot nH(2)O. Transmission electron microscopy images reveal that those belts are several micrometers in length and 80-100 nm in width. The crispations of the as-synthesized nanobelts are probably duo to their thickness. The products are shown to be crystallized by selected area electron diffraction characterization. The morphologies of the products were tuned by simply changing the reaction temperature. Nanotubes and expanding nanobelts are obtained at 140 degrees C and 160 degrees C, respectively. Magnetic hysteresis measurements indicate that the as-synthesized nanobelts are of weak ferromagnetic property at room temperature. (C) 2008 Elsevier B.V. All rights reserved.