期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 182, 期 2, 页码 339-347出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2008.10.023
关键词
Lanthanide orthophosphate; Ultrasonic irradiation; Nanoparticles; Formation mechanism; Luminescence
资金
- Chinese Academy of Science
- MOST of China [2007CB935502]
- National Natural Science Foundation of China [50572103, 20431030, 00610227, 50872131]
Uniform lanthanide orthophosphate LnPO(4) (Ln = La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho) nanoparticles have been systematically synthesized via a facile, fast, efficient ultrasonic irradiation of inorganic salt aqueous solution under ambient conditions without any surfactant or template. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED), photoluminescence (PL) spectra as well as kinetic decays were employed to characterize the samples. The SEM and the TEM images show that the hexagonal structured lanthanide orthophosphate LnPO(4) (Ln = La, Ce, Pr, Nd. Sm, Eu, Gd) products have nanorod bundles morphology, while the tetragonal LnPO(4) (Ln = Tb, Dy, Ho) samples prepared under the same experimental conditions are composed of nanoparticles. HRTEM micrographs and SAED results prove that these nanostructures are polycrystalline in nature. The possible formation mechanism for LnPO(4) (Ln = La-Gd) nanorod bundles is proposed. Eu3+-doped LaPO4 and Tb3+-doped CePO4 samples were also prepared by using the same synthetic process, which exhibit an orange-red (Eu3+:D-5(0)-F-7(1, 2, 3, 4)) and green (Tb3+, D-5(4)-F-7(3, 4, 5, 6)) emission, respectively. (C) 2008 Elsevier Inc. All rights reserved.
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