Synthesis and Characterization of Yttrium Titanate and Er doped Yttrium Titanate Nanofibers

Autor: Matthew Bolin, George Trifon, Kaleb Hartman, Kanchan Mondal, Mallika Dasari, Chung-Ying Tsai, Debalina Dasgupta
Rok vydání: 2013
Předmět:
Zdroj: PRICM
ISSN: 1946-4274
0272-9172
DOI: 10.1557/opl.2013.860
Popis: Yttrium Titanate belongs to a family of compounds called pyrochlores with significant properties such as ionic conduction, optical non-linearity and radiation tolerance that have resulted in applications thermal barrier coatings, high-permittivity dielectrics, solid electrolytes in solidoxide fuel cells, and materials for safe disposal of actinide-containing nuclear waste, and hydrogen storage material. The application of these materials in ODS ferritic steels have been recently evaluated. In recent years, it has also been shown to have higher activity than TiO2 for photocatalytic water splitting and a more efficient host material than TiO2 for Er3+ luminescence. The calculated band gap for yttrium titanate is 2.84 eV as compared to 3.12 eV for TiO2. Since Y3+ and Er3+ have similar ionic radii, crystal structural and lattice constants, Er can easily replace Y3+ to form Er doped yttrium titanate. The Y3+ and Er3+ are indistinguishable and as a result Er3+ does not cluster, thereby reducing concentration quenching. Additionally, Y2Ti2O7 has low phonon energy (
Databáze: OpenAIRE
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