期刊
CRYSTENGCOMM
卷 14, 期 5, 页码 1760-1769出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1ce06232h
关键词
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资金
- NSFC (National Natural Science Foundation of China) [21173034, 11104024, 50972021, 11104023, 61078061]
- Foundation of Education Department of Liaoning Province [2010056]
- Fundamental Research Funds for the Central Universities [017004, 2011JC037, 2011ZD032, 2011QN152, 2011ZD033, 2011JC036]
Three dimensional (3D) flower-shaped microarchitectures of NaY(WO4)(2) were synthesized via a microwave-assisted hydrothermal process in the presence of trisodium citrate (Na(3)Cit) and a post-calcination process. The effects of reaction conditions on the morphology of precursor microstructures were studied. It was found that Na(3)Cit, as the chelating agent and shape modifier, plays a key role in the microstructure growth. A possible growth mechanism for the flower-shaped microarchitectures was proposed. The as-formed precursor can completely transform into NaY(WO4)(2) with its original flower-shaped morphology via a heat treatment process. The concentration and temperature quenching behaviors of Eu3+ fluorescence in the flower-shaped NaY(WO4)(2) were studied, and the optimal doping concentration was confirmed, meanwhile the activation energy was obtained. Judd-Ofelt parameters Omega(lambda) (lambda - 2, 4 and 6) of Eu3+ in the flower-shaped NaY(WO4)(2) phosphor were obtained by using the emission spectrum of Eu3+, moreover the radiative transition properties were analyzed.
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