Abstract
Ammonium metavanadate, NH4VO3, plays an important role in the preparation of vanadium oxides and other ammonium compounds, such as NH4V3O8, (NH4)2V3O8, and NH4V4O10, which were found to possess interesting electrochemical properties. In this work, a new route for the synthesis of NH4VO3 is proposed by mixing an organic ammonium salt and V2O5 in a suitable solvent. The one-step procedure is carried out at room temperature. Additionally, the need for pH control and use of oxidants necessary in known methods is eliminated. The mechanism of the NH4VO3 formation is explained. It is presented that it is possible to tailor the morphology and size of the obtained NH4VO3 crystals, depending on the combination of reagents. Nano- and microcrystals of NH4VO3 are obtained and used as precursors in the hydrothermal synthesis of higher ammonium vanadates. It is proven that the size of the precursor particles can significantly affect the physical and chemical properties of the resulting products.
Highlights
Ammonium metavanadate (NH4 VO3 ) plays an important role in the preparation and purification of vanadium compounds, including, for example, NH4 V3 O8, NH4 V4 O10, (NH4 )0.6 V2 O5, and V2 O5, V6 O13 [1,2,3,4,5,6,7]
We report a simple, low temperature, one-pot approach for ammonium metavanadate synthesis, while using V2 O5 and chosen organic ammonium salt as substrates and suitable solvent
Ammonium metavanadate was obtained in a simple, low cost, and one-step method
Summary
Ammonium metavanadate (NH4 VO3 ) plays an important role in the preparation and purification of vanadium compounds, including, for example, NH4 V3 O8 , NH4 V4 O10, (NH4 )0.6 V2 O5 , and V2 O5, V6 O13 [1,2,3,4,5,6,7]. These vanadium oxides and their derivatives are of huge interest, mainly due to their. Ammonium metavanadate can be used as an electrolyte additive in the electrochemical anodization of magnesium alloy surface to improve its corrosion resistance [14]
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