| (La0.95Eu0.05)F3纳米晶的自牺牲模板法合成及其下转换发光性能研究 |
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| 引用本文： | 赵昕睿,李龙娇,龚长帅,王楚祺,马藤,王雪娇.(La0.95Eu0.05)F3纳米晶的自牺牲模板法合成及其下转换发光性能研究[J].人工晶体学报,2021,50(1):53-59. |
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| 作者姓名： | 赵昕睿 李龙娇 龚长帅 王楚祺 马藤 王雪娇 |
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| 作者单位： | 渤海大学化学与材料工程学院,锦州 121013 |
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| 基金项目： | 国家自然科学基金(51702020); 辽宁省教育厅青年育苗项目(LQ2019014); 辽宁省自然科学基金(2020-MS-286);大学生创新创业训练计划(202010167010) |
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| 摘 要： | 利用自牺牲模板法以一种新型稀土层状化合物(La0.95Eu0.05)2(OH)4SO4·2H2O为模板成功合成出(La0.95Eu0.05)F3纳米晶并研究其下转换发光性能。采用X射线衍射仪(XRD)、傅里叶红外变换(FT-IR)、场发射扫描电子显微镜(FE-SEM)及荧光光谱仪对合成产物的物相和荧光性能进行表征。XRD及Rietveld精修结果表明以稀土硝酸盐和硫酸铵为原料在100 ℃、pH值为9.5的条件下反应24 h可得到稀土层状化合物(La0.95Eu0.05)2(OH)4SO4·2H2O模板。自牺牲反应过程中,当模板中稀土离子与氟化铵中氟离子摩尔比为1∶3和1∶5时,在180 ℃下水热反应24 h可成功合成(La0.95Eu0.05)F3纳米晶。荧光光谱分析表明,(La0.95Eu0.05)F3荧光粉在395 nm的紫外光激发下,分别在591 nm(5D0→7F1跃迁,高强度)、618 nm(5D0→ 7F2跃迁,中等强度)和692 nm(5D0→ 7F4跃迁,低强度)处显示下转换发射。所得荧光粉的色坐标为(0.52,0.45),橙红光。荧光粉的主发射峰呈现单指数衰减行为,拟合后发现其荧光寿命约为14 ms。
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| 关 键 词： | 自牺牲模板法 稀土层状化合物 (La0.95Eu0.05)F3 下转换发光 纳米晶 |
| 收稿时间： | 2020-09-03 |
(La0.95Eu0.05)F3 Nanocrystal Synthesized by Sacrificial Template Method and Down-Conversion Luminescence Properties |
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| ZHAO Xinrui,LI Longjiao,GONG Changshuai,WANG Chuqi,MA Teng,WANG Xuejiao.(La0.95Eu0.05)F3 Nanocrystal Synthesized by Sacrificial Template Method and Down-Conversion Luminescence Properties[J].Journal of Synthetic Crystals,2021,50(1):53-59. |
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| Authors: | ZHAO Xinrui LI Longjiao GONG Changshuai WANG Chuqi MA Teng WANG Xuejiao |
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| Affiliation: | College of Chemistry and Materials Engineering, Bohai University, Jinzhou 121013, China |
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| Abstract: | (La0.95Eu0.05)F3 nanocrystals were successfully prepared from a novel (La0.95Eu0.05)2(OH)4SO4·2H2O template via sacrificial template method, and the down conversion photoluminescence were investigated. The phase and luminescence properties of the synthetic products were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FE-SEM), and photoluminescence (PL) spectroscopy. XRD and Rietveld refinement result indicate that (La0.95Eu0.05)2(OH)4SO4·2H2O template can be obtained using rare earth nitrate and ammonium sulfate as raw materials via hydrothermal reaction at 100 ℃, pH=9.5 for 24 h. The (La0.95Eu0.05)F3 nanocrystals can be successfully synthesized by sacrificial reaction at 180 ℃ for 24 h when the molar ratio of RE3+ and F- is 1∶3 or 1∶5. Photoluminescence analysis show that under 395 nm ultraviolet excitation, the (La0.95Eu0.05)F3 phosphor show down-conversion emission at 591 nm (5D0→ 7F1 transition, strong), 618 nm (5D0→ 7F2 transition, medium strong) and 692 nm(5D0→ 7F4 transition, weak), with color coordinates of around (0.52, 0.45), orange-red light. The strongest emission is found to decay in a single exponential manner and have fluorescence lifetime of 14 ms. |
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| Keywords: | sacrificial template layered rare earth hydroxide (La0 95Eu0 05)F3 down-conversion luminescence nanocrystal |
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