Journal
CERAMICS INTERNATIONAL
Volume 43, Issue 4, Pages 3623-3630Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2016.11.200
Keywords
Oxide materials; Sol-gel processes; Hydrothermal; Photoluminescence
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Funding
- Proyecto Basal CEDENNA [CEDENNA FB0807]
- Proyecto Anillo [ACT 1204]
- Deutsche Forschungsgemeinschaft, DFG, Germany [Ja821/4, SPP 1386, Ja821/7-1, SPP 1538]
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The Er3+-doped bismuth titanate (Bi4Ti3O12, BIT) nanoparticles were synthesized by a combined sol-gel and hydrothermal method under a partial oxygen pressure of 30 bar. The composition and morphology were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Raman scattering. They showed pure and homogeneous spherical BIT nanoparticles with a size below the 30 nm. The incorporation of Er ions showed a strong decrease in the lattice parameters, as well as averaged particle size. The photoluminescence up-conversion (excitation wavelength =1480 nm) showed an enhancement of the infrared emission (980 nm) as Er concentration increased, achieving a maximum for 6% mol, while photoluminescence spectra (excitation wavelength=473 nm) showed a strong green emission (529 and 553 nm) with a maximum at 4% mol.
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