Mild condition synthesis without high temperature process of Eu2+-doped barium orthosilicate nanophosphor via Water-Assisted Solid-State Reaction (WASSR) method

Yusuke Shibuta, Takuya Hasegawa, Sun Woog Kim, Kazuyoshi Uematsu, Kenji Toda, Mineo Sato

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

A green-emissive Ba2SiO4:Eu2+ nanophosphor has been succeeded to practically synthesize at the lowest temperature of 220 °C by a Water-Assisted Solid-State Reaction (WASSR) method, which has been developed by our group. The Ba2SiO4 was prepared with employing various barium and silicon sources, and the reaction proceeded only in the combination of Ba(OH)2·8H2O and amorphous SiO2. In addition, the results of X-ray powder diffraction gave evidence that the Ba2SiO4 phase was formed through a Ba2[SiO2(OH)2]2 phase as an intermediate in this synthetic method. The obtained primary particle size was found to be 15–20 nm because of employing mild condition without high temperature process. Additionally, the nanophosphors exhibited a green emission attributed to 4f65d1→4f7 transition of Eu2+ under the near UV excitation of 360 nm. The result indicates that Eu3+ is partly reduced to Eu2+ without using reduction gas.

Original languageEnglish
Pages (from-to)1009-1012
Number of pages4
JournalJournal of Alloys and Compounds
Volume788
DOIs
Publication statusPublished - 2019 Jun 5
Externally publishedYes

Keywords

  • BaSiO:Eu
  • Low temperature synthesis
  • Nanophosphors
  • Water-Assisted Solid-State Reaction method

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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