Journal
MATERIALS LETTERS
Volume 64, Issue 3, Pages 313-316Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2009.11.002
Keywords
Microcrystals; Electron microscopy; Luminescence
Funding
- Innovation Foundation of China's Ministry of Science and Technology [07C26214301746]
- Graduate degree thesis Innovation Foundation of Central South University [2009bsxt001]
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Novel 3D octahedral La2Sn2O7:Eu3+ microcrystals with pyrochlore structure have been synthesized via a hydrothermal route at 180 degrees C for 36 h. The experimental results revealed that the pH value of the precursor Solution not only plays an important role in determining the phase of the as-synthesized products, but also has a significant influence on the morphologies of the samples. High-quality and uniform octahedron with an average size of about 700 nm could be easily obtained at the pH value of 12. The photoluminescence spectra showed that 3D octahedral La2Sn2O7:Eu3+ displayed improved luminescence compared with the samples of with other shapes. The growth mechanism of octahedral La2Sn2O7:Eu3+ microcrystals was briefly proposed. (C) 2009 Elsevier B.V. All rights reserved.
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