Uniform and well-dispersed Y2O3:Eu/YVO4:Eu composite microspheres with high photoluminescence prepared by chemical corrosion approach

Uniform and well-dispersed Y2O3:Eu/YVO4:Eu composite microspheres were prepared by hydrothermal chemical corrosion Y2O3:Eu microspheres with Na3VO4 solution. Effects of pH, molar ratio of Na3VO4 to the Y2O3:Eu precursor (R), and reaction time (t) on the morphology and the crystal structure of the composite were investigated in detail. The photoluminescence intensity of the products synthesized under the optimum condition was much higher than that of the YVO4:Eu nanocrystals prepared by direct hydrothermal method and comparable to that of the bulk YVO4:Eu.