Excellent green emission of Tb³⁺ incorporated in MgAl-NO₃ layered double hydroxides system

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• 作者：Yufeng Chen ; ^{yfchen@ncu.du.cn" class="auth_mail" title="E-mail the corresponding author} ; Yao Bao ; Zhipeng Yu ; Guangchao Yang ; Ling Zhang
• 关键词：MgAl-LDHs ; Tb3+-doped ; Co-precipitation method ; Fluorescence
• 刊名：Journal of Luminescence
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：181
• 期：Complete
• 页码：71-77
• 全文大小：2127 K

文摘

A series of Tb-doped MgAl–NO₃ layered double hydroxides (LDHs) with Mg²⁺/(Al³⁺+Tb³⁺) molar ratios ranging from 1.0 to 4.0 were synthesized through co-precipitation method at room temperature. X-ray diffraction (XRD) results indicated that the crystallinity of all the Tb-doped samples presented a single phase corresponding to LDHs. SEM measurement suggested that all the samples have similar morphologies. Fluorescence spectra show strong green emissions at 490 and 544 nm, ascribed to the ⁵D₄→⁷F₆ and ⁵D₄→⁷F₅ transition of Tb³⁺, respectively. This result revealed that the MgAl–NO₃ LDH system was favorable for the green emissions of Tb³⁺ ions.