Glycothermal synthesis and characterization of scheelite-type NaEuW 2 O8 nanophosphors

Ryo Kasuya, Tetsuhiko Isobe

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Scheelite-type NaEuW2 O8 (NEW) nanophosphors were synthesized from a tungsten source and acetates of sodium and europium(III) in 1,4-butylene glycol by a glycothermal reaction. When dodecatungstophosphoric acid hexahydrate (DPA) was chosen as a tungsten source, a glycothermal reaction at temperatures ranging from 200 to 300°C produced crystalline NEW nanophosphors in a single phase. The tetrahedral PO4 unit derived from DPA plays a significant role in the formation of crystalline NEW. The photoluminescence intensity due to the 4f-4f transitions of Eu3+ for the sample prepared at 200°C was over 80 times higher than that of the sample prepared at 300°C. The amount of organic species, determined by thermogravimetry, for the former was three times larger than that of the latter. We therefore conclude that the effect of surface passivation predominantly enhances the photoluminescence intensity of the scheelite-type NEW nanophosphor.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume156
Issue number9
DOIs
Publication statusPublished - 2009

Fingerprint

scheelite
Tungsten
Photoluminescence
tungsten
Europium
Crystalline materials
photoluminescence
Sodium Acetate
acids
Acids
butenes
synthesis
europium
thermogravimetry
Glycols
Passivation
passivity
Thermogravimetric analysis
glycols
acetates

ASJC Scopus subject areas

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

Cite this

Glycothermal synthesis and characterization of scheelite-type NaEuW 2 O8 nanophosphors. / Kasuya, Ryo; Isobe, Tetsuhiko.

In: Journal of the Electrochemical Society, Vol. 156, No. 9, 2009.

Research output: Contribution to journalArticle

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