Synthesis of nano-sized YAG:Eu3+ phosphor in continuous supercritical water system

Jung Hyun In, Hyeon Cheol Lee, Min Jae Yoon, Kyo Kwang Lee, Jae Wook Lee, Chang Ha Lee

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61 Citations (Scopus)

Abstract

Luminescent yttrium aluminum garnet (Y3Al5O12) nanoparticles doped with Eu (YAG:Eu3+) were continuously synthesized by directly feeding potassium hydroxide solution and metal salt solution to supercritical water (SCW). Effects of Eu concentration, pH, and residence time on photo-luminescence were studied using a continuous tubular reactor. Residence time played a key role in producing single-phase YAG:Eu3+ nanoparticles. The residence time of 20 s under SCW conditions (400 °C and 280 bar) was enough to form YAG:Eu3+ phosphor without any intermediate phases. At this residence time, the Eu concentration and pH condition under SCW contributed to improving the size, morphology and luminescent property of YAG: Eu3+ nanoparticles. The average size of the prepared phosphor nanoparticles at 10 at.% and pH of 9.10 was 74 nm and the morphology was identified as nearly uniform and spherical-like in shape. Without further thermal treatment, the phosphor YAG:Eu3+ synthesized in the continuous reactor under SCW conditions showed strong luminescence properties and red emission spectra.

Original languageEnglish
Pages (from-to)389-396
Number of pages8
JournalJournal of Supercritical Fluids
Volume40
Issue number3
DOIs
Publication statusPublished - 2007 Apr

Bibliographical note

Funding Information:
This subject is supported by Ministry of Environment as “The Eco-technopia 21 project” and the authors would like to thank the Ministry of Environment.

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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