碳酸氢铵共沉淀法制备(Y,Gd)_2O_3: Eu~(3+)纳米材料及光谱特性
Preparation and Spectrum Characteristics of (Y,Gd)_2O_3:Eu~(3+) Nano-particles by Ammonium Bicarbonate Co-precipitation Method
查看参考文献16篇
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文摘
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以碳酸氢铵作沉淀剂采用共沉淀法制备了(Y,Gd)_2O_3: Eu~(3+)纳米粉体.用FT-IR、DTA/TG、XRD和SEM对样品进行了表征,并用荧光光度计分析了样品的发射光谱.结果表明:碳酸氢铵为沉淀剂,先驱沉淀物经150 ℃干燥,800 ℃煅烧保温2 h时,合成了近似球形、粒径均匀、约为15～20 nm、分散性好的(Y,Gd)_2O_3: Eu~(3+)纳米粒子.随着掺入Eu~(3+)浓度的增加, 发射峰强升高;当掺入5 mol%的Eu~(3+)时,峰强最大; 当Eu~(3+)的含量高于5 mol%时出现了浓度猝灭,峰强反而降低. |
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其他语种文摘
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(Y, Gd)_2O_3: Eu~(3+) nanopowders were prepared by co-precipitation method using ammonium bicarbonate as precipitating agent. FT-IR,XRD, TEM, SEM, DTA/TG and SEM were used to characterize the samples. The emission spectrums of the samples were analyzed by the fluor-photometer. The results show that the powders are approximately spherical particles with even particle size of about 15-20 nm and good dispersivity under calcining at 800℃ for 2 h and drying at 150 ℃. With the increasing of Eu~(3+) concentration, the peak intensity enhanced. When the concentration of Eu~(3+) is 5 mol% , the emission peak of ~5D_0→~7F_2 transition has the strongest peak intensity. However, the peak intensity decreased when the doping concentration of Eu~(3+) is higher than 5 mol% , which induced by the concentration quenching. |
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来源
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人工晶体学报
,2009,38(3):746-750 【核心库】
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关键词
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共沉淀法
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(Y,Gd)_2O_3:Eu~(3+)纳米粒子
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光谱特性
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浓度猝灭
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地址
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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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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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1000-985X |
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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:3620254
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