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1. 玉林师范学院 化学与材料学院, 广西 玉林 537000
2. 广西大学 化学化工学院, 广西 南宁 530003
纸质出版日期:2014-12-3,
收稿日期:2014-7-23,
修回日期:2014-10-24,
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陶萍芳, 庞起, 覃利琴等. 微米级NaYF<sub>4</sub>:Eu<sup>3+</sup>的水热合成及其荧光性能研究[J]. 发光学报, 2014,35(12): 1437-1442
TAO Ping-fang, PANG Qi, QIN Li-qin etc. Hydrothermal Synthesis and Fluorescence Properties of Micro-size NaYF<sub>4</sub>:Eu<sup>3+</sup>[J]. Chinese Journal of Luminescence, 2014,35(12): 1437-1442
陶萍芳, 庞起, 覃利琴等. 微米级NaYF<sub>4</sub>:Eu<sup>3+</sup>的水热合成及其荧光性能研究[J]. 发光学报, 2014,35(12): 1437-1442 DOI: 10.3788/fgxb20143512.1437.
TAO Ping-fang, PANG Qi, QIN Li-qin etc. Hydrothermal Synthesis and Fluorescence Properties of Micro-size NaYF<sub>4</sub>:Eu<sup>3+</sup>[J]. Chinese Journal of Luminescence, 2014,35(12): 1437-1442 DOI: 10.3788/fgxb20143512.1437.
分别以EDTA-2Na和柠檬酸钠为辅助剂
采用温和的水热法合成了六方相NaYF
4
:Eu
3+
荧光材料.利用XRD、SEM、荧光分光光度计和FT-IR对样品的结构、形貌和荧光进行了表征.在反应温度为140 ℃、反应时间为24 h的水热条件下
得到的样品均为纯六方相的NaYF
4
.以EDTA-2Na为络合剂合成的NaYF
4
:Eu
3+
为20 m的微米级球形体
而以柠檬酸三钠为辅助剂合成的NaYF
4
:Eu
3+
为长度约为1.8 m的六棱柱微晶棒.样品的尺寸分布均匀、分散性好.辅助剂在微晶体的形貌控制过程中起了很大作用.在395 nm 光的激发下
NaYF
4
:Eu
3+
发射出蓝白色光
微米级球形体的荧光强度明显强于微晶棒.
NaYF
4
:Eu
3+
fluorescence powders were synthesized by mild hydrothermal method using EDTA-2Na as the complexing agent or sodium citrate as the assistant agent. Some physical properties were characterized by powder-X-ray diffraction (XRD)
scanning electron microscopy (SEM)
flourescence spectra
and FT-IR. XRD results show that all the samples synthesized at 140 ℃ for 24 h are pure hexagonal phase NaYF
4
. SEM images indicate that the as-prepared NaYF
4
:Eu
3+
is uniform microsphere with diameter of about 20 m using EDTA-2Na as the complexing agent
while hexagonal prism microrod with length of 1.8 m using sodium citrate as the assistant agent. EDTA-2Na and sodium citrate
as assistant agent introducing into the reaction system
play a critical role in the morphology control. The morphology of the microsphere and hexagonal prism microrod is determined by the complexation of EDTA-2Na and the selective adsorption of sodium citrate
respectively. The samples mainly emit blue-white light under 395 nm excitation. The fluorescence intensity of NaYF
4
:Eu
3+
microsphere is much stronger than that of microrod.
NaYF4:Eu3+水热合成微球荧光
NaYF4:Eu3+hydrothermal synthesismicrospherefluorescence
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