Journal of Nanoparticle Research

, Volume 12, Issue 2, pp 635–643

Luminescent properties of YVO4:Eu/SiO2 core–shell composite particles

Authors

  • Amurisana Bao
    • College of ChemistryJilin University
  • Hua Lai
    • College of ChemistryJilin University
  • Yuming Yang
    • College of ChemistryJilin University
  • Zhilong Liu
    • College of ChemistryJilin University
  • Chunyan Tao
    • Key Lab for Supramolecular Structure and Materials of Ministry of EducationJilin University
    • College of ChemistryJilin University
Research Paper

DOI: 10.1007/s11051-009-9633-y

Cite this article as:
Bao, A., Lai, H., Yang, Y. et al. J Nanopart Res (2010) 12: 635. doi:10.1007/s11051-009-9633-y

Abstract

We report an efficient process for preparing monodisperse SiO2@Y0.95Eu0.05VO4 core–shell phosphors using a simple citrate sol–gel method and without the use of surface-coupling silane agents or large stabilizers. X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and photoluminescence (PL) spectra were used to characterize the resulting SiO2@Y0.95Eu0.05VO4 core–shell phosphors. The XRD results demonstrate that the Y0.95Eu0.05VO4 particles crystallization on the surface of SiO2 annealing at 800 °C is perfectly and the crystallinity increases with raising the annealing temperature. The obtained core–shell phosphors have a near perfect spherical shape with narrow size distribution (average size ca. 500 nm and an average thickness of ~50 nm), are not agglomerated, and have a smooth surface. The thickness of the YVO4:Eu3+ shells on the SiO2 cores could be easily tailored by changing the mass ratio of shell to core (W = [YVO4]/[SiO2]) (~50 nm for W = 30%). The Eu3+ shows a strong PL luminescence (dominated by 5D0 − 7F2 red emission at 618 nm) under the excitation of 320 nm UV light. The PL intensity of Eu3+ increases with increasing the annealing temperature and the values of W.

Keywords

SiO2 YVO4:Eu3+ Core–shell Sol–gel process Luminescent properties Nanoparticles Synthesis

Copyright information

© Springer Science+Business Media B.V. 2009