微乳液法制备（Y,Gd）2O3：Eu^3＋纳米粒子及光谱特性
Preparation and optical spectrum characterisitics of （Y, Gd）eO3：Eu^3＋ nanoparticles by microemulsion
查看参考文献15篇
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文摘
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采用反相微乳液法制备（Y,Gd）_2O_3：Eu~(3＋)纳米粉体。通过XRD、TG/DSC、SEM、TEM、PL等手段分别对样品的晶化过程、晶粒尺寸、粉体形貌以及发光性能进行分析。结果表明：晶粒尺寸随着晶化温度提高而增加,样品在800℃晶化完全。当乳液浓度为0.37mol/L时所得粉体颗粒呈近似球形,一次粒径尺寸约20nm。样品在612nm监控光下得到的激发光谱是宽带谱,对应着Eu~(3＋)-O~(2-)的电荷迁移带跃迁。发射光谱的特征峰位于612nm处,是由于Eu~(3＋)离子的~5D_0-~7F_2跃迁造成的。当Eu的原子分数大于10%时发生浓度猝灭,导致特征峰强度降低。 |
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其他语种文摘
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（Y, Gd）_2O_3：Eu~(3＋) nanoparticles were prepared by reverse microemulsion method. The crystallization process, grain size, morphology and photoluminescence properties of the sample were characterized by XRD, TG/DSC, SEM, TEM and PL. The results show that the grain size increases with increasing crystallization temperature and the complete crystallization temperature of the precursor is 800 ℃. The particles are near-spherical with the primary size of 20 nm when the initiate concentration is 0.37 mol/L. The excitation spectra of （Y, Gd）_2O_3：Eu~(3＋) is observed by monitoring at 612 nm, and there is a wide band which is due to the charge transfer band （CTB） of Eu~(3＋)-O~(2-). The characteristic peak of （Y, Gd）_2O_3：Eu~(3＋) locates at 612 nm which is caused by ~5D_0-~7F_2 transition of Eu^3＋ excited by 237 nm. When the atomic content of Eu is above 10%, the concentration quenching occurs and it leads to the intensity decreasing of the characteristic peak. |
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来源
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中国有色金属学报
,2008,18(10):1931-1936 【核心库】
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关键词
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反相微乳液
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（Y,Gd）_2O-3：Eu~(3＋)纳米粒子
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发光性能
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浓度猝灭
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地址
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1.
沈阳化工学院材料科学与工程学院, 辽宁, 沈阳, 110142
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中国科学院金属研究所, 沈阳材料科学国家（联合）实验室, 辽宁, 沈阳, 110016
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沈阳大学材料科学与工程系, 辽宁, 沈阳, 110044
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1004-0609 |
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学科
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化学;化学工业 |
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基金
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辽宁省自然科学基金
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辽宁省科技攻关项目
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文献收藏号
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CSCD:3454774
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