Vol. 3, Issue 8, Part K (2017)

Abstract
Our attempt to synthesize Na₂V₃O₇ and LiVO₃ by using template free modified solvothermal methods with ethylene glycol-water solvent system (EG:H₂O; 2:1 v/v) followed by calcination at 500 °C in air have resulted in the formation of NaV₆O₁₅ admixed with NaV₃O₈, phase pure NaV₆O₁₅ and Li_0.6V_1.6O_3.67.H₂O. The compounds are being analyzed using P-XRD and FE-SEM. NaV₆O₁₅ crystallizes in the A2/m space group with a monoclinic crystal structure while Li_0.6V_1.6O_3.67.H₂O crystallizes in the I4/mmm space group with a tetragonal crystal structure. Refined lattice parameters of NaV₆O₁₅ are a = 10.151(5), b = 3.606(2), c = 15.581(1) Å, β = 109.45^o and Li_0.6V_1.6O_3.67.H₂O are a = 3.712(1), c = 15.96(1) Å. The phase pure NaV₆O₁₅ and NaV₃O₈ admixed NaV₆O₁₅ have rod shaped morphology with an average length of 7 μm and diameter of 0.5 μm.