Tm³⁺-doped Y₂O₃ nanocrystals: rapid hydrothermal synthesis and luminescence
Date
2009
Authors
Devaraju, M.K.
Yin, S.
Sato, T.
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European Journal of Inorganic Chemistry, 2009; 2009(29-30):4441-4445
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Abstract
Tm3+-doped Y2O3 nanocrystals were prepared via hydrothermal conditions at high autogenous pressure (ca 40 MPa) using batch reactors at 220 and 250 degrees C for very short periods of reaction time (10 min). The as-prepared materials were identified as Y(OH)(3) nanoparticles The precursor materials with two types of morphologies, such as sphere and rod-shaped particles were prepared at 220 and 250 degrees C within 10 min. The sizes of the as-prepared sphere particles are 1015 nil. in diameter, whereas the rod-shaped particles show 15-20 nm in diameter and 0.1-0.2 mu m to lengths The precursor materials were calcined at 500 and 800 degrees C for 5 h in air to obtain (3 mol-%) Tm3+-doped Y2O3 nanocrystals For the characterization, KRD, FESEM, EDS and TG-DTA were employed. The photoluminescence spectra of sphere and rod-shaped particles show higher blue emission at 450 nm than the reference sample.
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Copyright 2008 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.