Template-Free Hydrothermal Synthesis and Luminescent Properties of Octahedral NaGd(MoO4)(2):Eu3+ Microcrystals
Template-Free Hydrothermal Synthesis and Luminescent Properties of Octahedral NaGd(MoO4)(2):Eu3+ Microcrystals
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DOI：
10.1149/1.3467792
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发表时间：
2010-10
影响因子：
3.9
通讯作者：
W. Gong;Z. Fu;Shihong Zhou;Shan Du;Siyuan Zhang;Z. Dai;Wenhao Li
中科院分区：
文献类型：
--
作者：
W. Gong;Z. Fu;Shihong Zhou;Shan Du;Siyuan Zhang;Z. Dai;Wenhao Li
采用一步水热合成法，在不使用任何模板剂的情况下，成功地合成了结构均匀、结晶良好的八面体NaGd（MoO 4）（2）：Eu 3+微晶。采用X射线粉末衍射、场发射扫描电子显微镜、光致发光光谱和光致发光激发光谱对样品进行了表征。初始pH值对八面体微晶的纯相形成和形貌均匀性有重要影响。详细的实验结果表明，NaGd（MoO 4）（2）：Eu 3+微晶的生长过程是以成核-结晶-附着机制为主的。研究了不同形貌的NaGd（MoO 4）（2）：Eu 3+微晶体的发光性能，结果表明：不同形貌的NaGd（MoO 4）（2）：Eu 3+微晶体的发光强度不同，双锥八面体结构的NaGd（MoO 4）（2）：Eu 3+微晶体可以作为一种优良的近紫外白色发光器件的红色发光组分。(C)2010年电化学学会。[DOI：10.1149/1.3467792]保留所有权利。
Uniform and well-crystallized octahedral NaGd(MoO4)(2):Eu3+ microcrystals have been successfully synthesized by a facile one-step hydrothermal synthesis method without involving any templates. The prepared samples were systematically characterized by powder X-ray diffraction, field-emission-scanning electron microscopy, photoluminescence (PL), and photoluminescent excitation spectra. The starting pH value played an important role in the pure-phase formation and uniform morphology of octahedral microcrystals. Detailed proofs indicated that the growth process of NaGd(MoO4)(2):Eu3+ microcrystals was dominated by a nucleation-crystallization-oriented attachment mechanism. Furthermore, the luminescent properties of the as-synthesized NaGd(MoO4)(2):Eu3+ microcrystals were investigated, demonstrating that the PL intensity was influenced by the different morphologies, and the bipyramidal octahedra NaGd(MoO4)(2):Eu3+ luminescent microcrystals might be applied as an excellent red component for near-UV white light emitting diodes. (C) 2010 The Electrochemical Society. [DOI: 10.1149/1.3467792] All rights reserved.