3D Hierarchical Architectures of Sodium Lanthanide Sulfates: Hydrothermal Synthesis, Formation Mechanisms, and Luminescence Properties

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• 作者：Yanhua Song ; Haifeng Zou ; Ye Sheng ; Keyan Zheng ; Hongpeng You
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：October 13, 2011
• 年：2011
• 卷：115
• 期：40
• 页码：19463-19469
• 全文大小：957K
• 年卷期：v.115,no.40(October 13, 2011)
• ISSN：1932-7455

文摘

Sodium lanthanide sulfate NaLn(SO₄)₂路H₂O (Ln = Y, La to Yb) nano/microcrystals with multiform morphologies were successfully synthesized by a facile and effective hydrothermal method. The photoluminescence properties of the Ce³⁺ and Tb³⁺ single-doped as well as the Ce³⁺鈥揟b³⁺ codoped NaY(SO₄)₂路H₂O microsheaves were characterized. The results reveal that the existence of the Ce³⁺ ions can dramatically enhance the emission intensity of the Tb³⁺ ions, due to an efficient energy transfer from the Ce³⁺ to the Tb³⁺ ions. The critical energy-transfer distance between the Ce³⁺ and the Tb³⁺ ions was calculated by methods of concentration quenching and spectral overlapping. Analysis and calculation reveal that the dipole鈥搎uadrupole interaction should be mainly responsible for the energy transfer.