Effects of citrate additive on transparency and photostability properties of YVO4: Bi3+, Eu3+ nanophosphor

Satoru Takeshita, Hiroko Ogata, Tetsuhiko Isobe, Tomohiro Sawayama, Seiji Niikura

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)

Abstract

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+.

Original languageEnglish
Pages (from-to)J74-J80
JournalJournal of the Electrochemical Society
Volume157
Issue number3
DOIs
Publication statusPublished - 2010 Feb 16

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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