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Nanomaterials 2018, 8(12), 988; https://doi.org/10.3390/nano8120988

Full Tetragonal Phase Stabilization in ZrO2 Nanoparticles Using Wet Impregnation: Interplay of Host Structure, Dopant Concentration and Sensitivity of Characterization Technique

1
National Institute for Laser, Plasma and Radiation Physics, RO 76900 Bucharest-Magurele, Romania
2
Department of Chemistry, University of Bucharest, B-dul Regina Elisabeta, nr. 4-12, 030018 Bucharest, Romania
3
National Institute of Materials Physics, 405A Atomistilor Street, 077125 Magurele-Ilfov, Romania
4
Department of Molecular Sciences, Biocenter, SLU, Box 7015, SE-75007 Uppsala, Sweden
*
Author to whom correspondence should be addressed.
Received: 2 November 2018 / Revised: 22 November 2018 / Accepted: 23 November 2018 / Published: 28 November 2018
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Abstract

Here, we show that wet impregnation of ZrO2 nanoparticles with 10% and 20% Eu oxide followed by thermal anneal in air above 500 °C produces full stabilization of the tetragonal phase of ZrO2 without evidencing any phase separation. The bare ZrO2 nanoparticles were obtained using three synthetic methods: oil in water microemulsion, rapid hydrothermal, and citrate complexation methods. The homogeneity of the solid solutions was assessed using X-ray diffraction, Raman spectroscopy, high resolution transmission electron microscopy, and advanced luminescence spectroscopy. Our findings show that wet impregnation, which is a recognized method for obtaining surface doped oxides, can be successfully used for obtaining doped oxides in the bulk with good homogeneity at the atomic scale. The limits of characterization technique in detecting minor phases and the roles of dopant concentration and host structure in formation of phase stabilized solid solutions are also analyzed and discussed. View Full-Text
Keywords: ZrO2; tetragonal phase stabilization; average structure; local symmetry; wet impregnation; luminescence ZrO2; tetragonal phase stabilization; average structure; local symmetry; wet impregnation; luminescence
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Colbea, C.; Avram, D.; Cojocaru, B.; Negrea, R.; Ghica, C.; Kessler, V.G.; Seisenbaeva, G.A.; Parvulescu, V.; Tiseanu, C. Full Tetragonal Phase Stabilization in ZrO2 Nanoparticles Using Wet Impregnation: Interplay of Host Structure, Dopant Concentration and Sensitivity of Characterization Technique. Nanomaterials 2018, 8, 988.

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