Polyol synthesis of YVO4: Bi3+,Eu3+ nanophosphors and effect of silica coating on their photoluminescence properties

Hiroki Hara, Satoru Takeshita, Tetsuhiko Isobe, Tomohiro Sawayama, Seiji Niikura

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

YVO4:Bi3+,Eu3+ nanophosphor is prepared from sodium orthovanadate and nitrates of yttrium, bismuth, and europium in a polyol solvent of diethylene glycol at 160°C. The photoluminescence (PL) intensity of the nanophosphor is enhanced by a factor of 3.3 after silica coating via reverse micelle method. The gradual increase in the PL intensity is observed under the continuous excitation irrespective of silica coating. This increase in the PL intensity is attributed to the photooxidation of V4+ to V5+, as confirmed by electron spin resonance spectroscopy. Finally, a highly luminescent and photostable nanophosphor can be prepared by combination of photooxidation pre-treatment and silica coating.

Original languageEnglish
JournalJournal of Ceramic Processing Research
Volume14
Issue numberSUPPL.1
Publication statusPublished - 2013

Fingerprint

Polyols
Silicon Dioxide
Photoluminescence
Photooxidation
Silica
Coatings
Europium
Electron spin resonance spectroscopy
Yttrium
Bismuth
Vanadates
Micelles
Glycols
Nitrates
Sodium
polyol

Keywords

  • Eu
  • Nanophosphor
  • Photostability
  • Polyol synthesis
  • Silica coating
  • YVO:Bi

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Polyol synthesis of YVO4 : Bi3+,Eu3+ nanophosphors and effect of silica coating on their photoluminescence properties. / Hara, Hiroki; Takeshita, Satoru; Isobe, Tetsuhiko; Sawayama, Tomohiro; Niikura, Seiji.

In: Journal of Ceramic Processing Research, Vol. 14, No. SUPPL.1, 2013.

Research output: Contribution to journalArticle

@article{619603875ae14219a34e422af3219b6e,
title = "Polyol synthesis of YVO4: Bi3+,Eu3+ nanophosphors and effect of silica coating on their photoluminescence properties",
abstract = "YVO4:Bi3+,Eu3+ nanophosphor is prepared from sodium orthovanadate and nitrates of yttrium, bismuth, and europium in a polyol solvent of diethylene glycol at 160°C. The photoluminescence (PL) intensity of the nanophosphor is enhanced by a factor of 3.3 after silica coating via reverse micelle method. The gradual increase in the PL intensity is observed under the continuous excitation irrespective of silica coating. This increase in the PL intensity is attributed to the photooxidation of V4+ to V5+, as confirmed by electron spin resonance spectroscopy. Finally, a highly luminescent and photostable nanophosphor can be prepared by combination of photooxidation pre-treatment and silica coating.",
keywords = "Eu, Nanophosphor, Photostability, Polyol synthesis, Silica coating, YVO:Bi",
author = "Hiroki Hara and Satoru Takeshita and Tetsuhiko Isobe and Tomohiro Sawayama and Seiji Niikura",
year = "2013",
language = "English",
volume = "14",
journal = "Journal of Ceramic Processing Research",
issn = "1229-9162",
publisher = "Hanyang University",
number = "SUPPL.1",

}

TY - JOUR

T1 - Polyol synthesis of YVO4

T2 - Bi3+,Eu3+ nanophosphors and effect of silica coating on their photoluminescence properties

AU - Hara, Hiroki

AU - Takeshita, Satoru

AU - Isobe, Tetsuhiko

AU - Sawayama, Tomohiro

AU - Niikura, Seiji

PY - 2013

Y1 - 2013

N2 - YVO4:Bi3+,Eu3+ nanophosphor is prepared from sodium orthovanadate and nitrates of yttrium, bismuth, and europium in a polyol solvent of diethylene glycol at 160°C. The photoluminescence (PL) intensity of the nanophosphor is enhanced by a factor of 3.3 after silica coating via reverse micelle method. The gradual increase in the PL intensity is observed under the continuous excitation irrespective of silica coating. This increase in the PL intensity is attributed to the photooxidation of V4+ to V5+, as confirmed by electron spin resonance spectroscopy. Finally, a highly luminescent and photostable nanophosphor can be prepared by combination of photooxidation pre-treatment and silica coating.

AB - YVO4:Bi3+,Eu3+ nanophosphor is prepared from sodium orthovanadate and nitrates of yttrium, bismuth, and europium in a polyol solvent of diethylene glycol at 160°C. The photoluminescence (PL) intensity of the nanophosphor is enhanced by a factor of 3.3 after silica coating via reverse micelle method. The gradual increase in the PL intensity is observed under the continuous excitation irrespective of silica coating. This increase in the PL intensity is attributed to the photooxidation of V4+ to V5+, as confirmed by electron spin resonance spectroscopy. Finally, a highly luminescent and photostable nanophosphor can be prepared by combination of photooxidation pre-treatment and silica coating.

KW - Eu

KW - Nanophosphor

KW - Photostability

KW - Polyol synthesis

KW - Silica coating

KW - YVO:Bi

UR - http://www.scopus.com/inward/record.url?scp=84879382242&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84879382242&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:84879382242

VL - 14

JO - Journal of Ceramic Processing Research

JF - Journal of Ceramic Processing Research

SN - 1229-9162

IS - SUPPL.1

ER -