YV O4: Bi3+, Eu3+ nanoparticles were prepared by the wet chemical synthesis in various concentrations of sodium citrate, 15≤ xcit ≤90, where xcit is the nominal molar percentage of citrate relative to the sum of metallic ions, Y 3+, Bi3+, and Eu3+. Mean primary nanoparticle diameter and mean hydrodynamic size in the aqueous colloidal solution have minimum values, 21 and 36 nm, respectively, for the sample prepared at x cit =50. The transparency of the aqueous colloidal solution in the visible region increases with decreasing the mean hydrodynamic size, and the sample prepared at xcit =50 shows the highest transparency. YV O 4: Bi3+, Eu3+ nanoparticles show the characteristic photobleaching behavior and the photoreduction of V5+ to V4+ under the irradiation of near-UV light, where the fraction of photobleach becomes larger at large xcit. These results suggest that the citrate ion works not only as an effective dispersion agent, but also as a reducing agent against V5+ of YV O4: Bi3+, Eu3+.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films
- Materials Chemistry