Synthesis and characterization of Y2O2S:Eu3+, Mg2+, Ti4+ hollow nanospheres via a template-free route
Synthesis and characterization of Y2O2S:Eu3+, Mg2+, Ti4+ hollow nanospheres via a template-free route
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无模板法合成Y2O2S:Eu3、Mg2、Ti4空心纳米球并表征
DOI：
10.1016/j.jallcom.2012.07.060
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发表时间：
2012-11-25
影响因子：
6.2
通讯作者：
Zheng, Mingtao
中科院分区：
文献类型：
--
作者：
Deng, Suqing;Xue, Zhiping;Zheng, Mingtao
采用硫脲基均匀沉淀结合后煅烧工艺，成功制备了红色长余辉磷光材料——单分散Y2O2S:Eu3+、Mg2+、Ti4+空心纳米球。发生自组装和奥斯特瓦尔德熟化过程，形成非晶前驱体的中空结构。分别通过 X 射线衍射 (XRD) 图案、傅里叶变换红外 (FT-IR) 光谱、扫描和透射电子显微镜 (SEM 和 TEM) 图片研究了晶体结构和颗粒形貌。提出了一种可能的生长机制来揭示形成过程。通过测量激发光谱、发射光谱、余辉衰减曲线和热释光曲线，分析了Y2O2S:Eu3+、Mg2+、Ti4+空心纳米球与块体材料的发光性能。人们认为该合成路线可能具有用于制造其他镧系氧硫化物的潜在应用。 Crown 版权所有 (C) 2012 由 Elsevier B.V. 出版。保留所有权利。
A red long-lasting phosphorescent material, monodisperse Y2O2S:Eu3+, Mg2+, Ti4+ hollow nanospheres have been prepared successfully by a thiourea-based homogeneous precipitation combining with a post-calcining process. Self-assembly and Ostwald ripening process occured to form hollow structure of amorphous precursors. The crystalstructure and particle morphology were investigated by the X-ray diffraction (XRD) patterns, Fourier Transform Infrared (FT-IR) spectra, scanning and transmission electron microscopy (SEM and TEM) pictures, respectively. A possible growth mechanism was proposed to reveal the formation process. Luminescence properties of the Y2O2S:Eu3+, Mg2+, Ti4+ hollow nanosphere compared with bulk material were analyzed by measuring the excitation spectra, emission spectra, afterglow decay curve and thermoluminescence curve. It was considered that this synthetic route may have potential applications for fabricating other lanthanide oxysulfides. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.