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Monazite and Zircon Type LaVO 4 :Eu Nanocrystals – Synthesis, Luminescent Properties, and Spectroscopic Identification of the Eu 3+ Sites
Author(s) -
Jia ChunJiang,
Sun LingDong,
Yan ZhengGuang,
Pang YuCheng,
Lü ShaoZhe,
Yan ChunHua
Publication year - 2010
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201000038
Subject(s) - luminescence , nanocrystal , raman spectroscopy , europium , chemistry , monoclinic crystal system , tetragonal crystal system , spectroscopy , microstructure , lanthanide , hydrothermal synthesis , crystallography , analytical chemistry (journal) , nanotechnology , inorganic chemistry , ion , nuclear chemistry , materials science , hydrothermal circulation , chemical engineering , crystal structure , optoelectronics , optics , organic chemistry , physics , engineering , quantum mechanics
Pure monoclinic‐ (m) and tetragonal (t) LaVO 4 :Eu nanocrystals were prepared by a facile citric anion‐ and EDTA (ethylenediaminetetraacetic acid)‐assisted hydrothermal method, respectively. The structure is characterized by XRD, Raman spectroscopy, and electron microscopy. Besides structure characterization, site‐selective emission spectroscopy was used to investigate the relationship between the microstructure and luminescent characters of the m‐ and t‐LaVO 4 :Eu nanocrystals. The results show that for both the m‐ and t‐LaVO 4 :Eu nanocrystals, the Eu 3+ ions occupy two types of sites, one that is the same as that of the corresponding bulk and the other that is specific to the surface states of the nanocrystals. These investigations not only provide important experimental evidence for rare earth luminescence studies, but also disclose the correlation between the microstructure and luminescence behavior, which could be used as a guide to the design and synthesis of novel luminescence materials. It is also shown that t‐LaVO 4 :Eu is a promising luminescence material with a high quantum yield and low cost.