One-step mild hydrothermal method to prepare low valent sodium vanadium(III) monohydrogenphosphate: NaV(HPO4)2 |
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| Institution: | 1. #120, Energy Materials Lab, Department of Physics, Science Block, Alagappa University, Karaikudi-630003, Tamil Nadu, India.;2. Centre for Automotive Energy Materials, International Advanced, Research Centre for Powder Metallurgy and New Materials (ARCI), Taramani, Chennai 600113, India;1. BGRIMM Technology Group, Beijing 100160, China;2. Department of Chemistry, City University of Hong Kong, Hong Kong 999077, China |
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| Abstract: | Green colored single crystals of a reduced sodium vanadium(III) monohydrogenphosphate, NaV(HPO4)2, were grown using a one-step mild hydrothermal method. The in situ reduction of V5+ to V3+ was performed using copper acetate as the reducing agent. The title compound crystalizes in the monoclinic space group Cc and exhibits a three-dimensional crystal structure that consists of distorted VO6 octahedra connected to PO3(OH) tetrahedra that are further connected via Na cations. The compound exhibits simple paramagnetic behavior at high temperatures and a discontinuity near 5 K is likely due to the onset of magnetic coupling. The compound was also characterized by TGA, IR and UV–vis spectroscopies. |
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| Keywords: | Vanadium(III) monohydrogenphosphate Acetate reducing agent One step hydrothermal method |
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