Synthesis of sodium vanadate nanosized materials for electrochemical applications

• Published in: The Journal of physics and chemistry of solids 2008-05, Vol.69 (5), p.1261-1264
• Main Authors: Subba Reddy, Ch.V., Yeo, In-Hyeong, Mho, Sun-il
• Format: Article
• Language: English
• Subjects: Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Materials science; Nanocrystalline materials; Nanoscale materials and structures: fabrication and characterization; Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals; Physics; Structure of solids and liquids; crystallography
• ISSN: 0022-3697; 1879-2553
• DOI: 10.1016/j.jpcs.2007.10.072

Sodium vanadate nanomaterials with the shape of belts and flakes were prepared by simply controlling the pH from the alkaline solution of V 2O 5. Nanostructured materials have grown from the sol evaporated from the pH-controlled solutions. The dimensions of the nanobelts are about 50–500 nm in width and 1–6 μm in length with rectangular flat tips with four sharp corners. Smooth facets enclose the surfaces of the nanostructures and form the sharp edges. The structures were identified as Na 1.1V 3O 7.9 and NaVO 3 by an XRD analysis. The cyclic voltammograms of the electrodes composed of the mixture of Na 1.1V 3O 7.9 and NaVO 3 has higher current density than the electrodes made of the Na 1.1V 3O 7.9 nanostructures.