Facile synthesis of lanthanide vanadates and their luminescent properties

摘要

GdVO_4:Eu~(3+), Bi~(3+) with tetragonal phase has been successfully synthesized by employing efficient irradiations. The assembly of composites with fine grains based on acoustic energy and microwave radiation requires low temperature (90 ℃) and short reaction time (60 min). All the compounds exhibited red emissions and they can be sensitized through the doped Bi~(3+) ions. The dependence of pH changes and doping concentration on the fluorescence features has been discussed. The photoluminescence measurements show that the optical properties achieved the best results at pH = 9 for GdVO_4:Eu~(3+)(5 mol%), Bi~(3+)(1 mol%) or pH = 7 for GdVO_4:Eu~(3+).