Production, characterization, and photocatalytic properties of Eu:Y2O3 nanopowders

Fatma Unal*, Emre Alp, Kursat Kazmanli

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Eu:Y2O3 nanophosphors (NPs) with different Eu concentrations (3, 5, and 7 at%) were successfully synthesized via the sol–gel method. All synthesized powders had a cubic bixbyite-type crystal structure with space group Ia-3. It was observed they had agglomerated sphere-like morphologies. In addition, a neck formation between the particles, which was the result of the sintering effect at the increasing calcination temperature, was also observed by scanning electron microscopy analysis. Raman and X-ray photoelectron spectroscopy (XPS) analyses confirmed that the Eu dopant entered into the Y2O3 host. The XPS peak positions shifted to relatively higher binding energy values with increasing dopant concentration and calcination temperature. Increasing Eu dopant concentration in the host structure also increased the 3+ valence ions. The band gap values of the NPs varied between 4.30 and 4.54 eV. The powders doped with 5 at% Eu was active as photocatalysts and the powders that were synthesized at 800°C exhibited highly photocatalytic activity.

Original languageEnglish
Pages (from-to)1744-1753
Number of pages10
JournalJournal of the Chinese Chemical Society
Volume69
Issue number10
DOIs
Publication statusPublished - Oct 2022

Bibliographical note

Publisher Copyright:
© 2022 The Chemical Society Located in Taipei & Wiley-VCH GmbH.

Keywords

  • Eu doped yttrium oxide nanophosphors
  • Williamson–Hall
  • XPS investigation
  • crystallite size
  • photocatalytic activity
  • sol–gel method

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