2001 年 42 巻 9 号 p. 1854-1857
Vanadium-based layered compounds were synthesized from a reaction between ammonium vanadate and supercritical/non-supercritical water. The hydrothermal conditions were as follows: treatment temperature of 773 K and pressure of 30 to 100 MPa. We characterized specimens by scanning electron microscopy, energy dispersive X-ray spectroscopy (EDX), X-ray diffractometry, transmission electron microscopy and thermogravimetry. Then we determined the condition of repeatable synthesis of the layered compound with a 0.98 nm basal spacing. The compound included no impurity, at least at the sensitivity of EDX . The compound showed good stability up to 500 K . We infer the chemical formula of the compound to be V2O5·0.5H2O.
