期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 183, 期 9, 页码 2222-2226出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2010.07.042
关键词
Mg-Al-Eu ternary LDHs; Photoluminescence; Eu ions emissions
资金
- Natural Science Foundation of Jiangxi Province [2009GZC0085, 2008GQH0046]
- National Natural Science Foundation of China [50902067]
- University of Jiangxi Province
A series of Mg-Al-Eu ternary hydrotalcite-like layered double hydroxides (LDHs), with Eu/Al atomic ratios of similar to 0.06 and Mg/(Al + Eu) atomic ratios ranging from 1.3 to 4.0, were synthesized by a coprecipitation method. The Mg-Al-Eu ternary LDHs were investigated by various techniques. X-ray diffraction (XRD) results indicated that the crystallinity of the ternary LDHs was gradually improved with the increase of Mg2+/(Al3+ +Eu3+) molar ratio from 1.3/1 to 4/1, and all the samples were a single phase corresponding to LDH. The photoluminescent (PL) spectra of the ternary Mg-Al-Eu LDHs were described by the well-known D-5(0)-F-7(J) transition (J=1, 2, 3, 4) of Eu3+ ions with the strongest emission for J=2, suggesting that the host LDH was favorable to the emissions of Eu3+ ions. The asymmetry parameter (R) relevant to D-5(0)-F-7(J) transition (J=1, 2) dependant of the atomic ratios of Mg2+/(Al3+ + Eu3+) was discussed, and was consistent with the result of XRD. (C) 2010 Elsevier Inc. All rights reserved.
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