| 引用本文: | 杨流赛,孟晓燕,罗伟,孙宇杰,熊玉环,王运健.CaMoO4:Eu3+纳米荧光粉的尺寸调控及光学性能研究[J].材料科学与工艺,2019,27(4):42-49.DOI:10.11951/j.issn.1005-0299.20180043. |
| YANG Liusai,MENG Xiaoyan,LUO Wei,SUN Yujie,XIONG Yuhuan,WANG Yunjian.Size control and optical properties of CaMoO4:Eu3+ nanophosphors[J].Materials Science and Technology,2019,27(4):42-49.DOI:10.11951/j.issn.1005-0299.20180043. |
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| 摘要: |
| 采用水热法制备了CaMoO4:Eu3+纳米荧光粉.研究了反应温度、反应时间和Eu3+掺杂浓度对CaMoO4:Eu3+纳米晶的颗粒尺寸以及光学性能的影响.利用XRD、SEM、FT-IR、UV-Vis和PL对所得样品的相结构、形貌、光学吸收以及发光性能进行了表征.研究结果表明：所合成样品均为四方晶系白钨矿结构的CaMoO4纳米晶；一方面，随着水热反应温度的降低或者反应时间的缩短，CaMoO4:Eu3+纳米晶都表现出尺寸减小的趋势，荧光强度逐渐减弱，样品的紫外可见光吸收带边发生蓝移；另一方面，随着Eu3+掺杂浓度的增加，CaMoO4:Eu3+纳米晶的颗粒尺寸逐渐减小，样品的紫外可见光吸收带边出现红移.同时，在275 nm的光激发下，CaMoO4:Eu3+荧光粉在614 nm处的5D0→7F2跃迁具有最高的荧光强度，观察到红光发射，且发现其荧光猝灭摩尔浓度为6%. |
| 关键词: CaMoO4 Eu3+掺杂 水热合成 光学性能 |
| DOI：10.11951/j.issn.1005-0299.20180043 |
| 分类号:TB34 |
| 文献标识码:A |
| 基金项目:江西省青年科学基金项目 (20161BAB213058)；上饶师范学院大学生学术科技研究项目(XS201722)；校级大学生创新训练项目(2017-CX-26) ；中国博士后科学基金项目(2015M571977). |
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| Size control and optical properties of CaMoO4:Eu3+ nanophosphors |
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YANG Liusai1, MENG Xiaoyan1, LUO Wei1, SUN Yujie1, XIONG Yuhuan2, WANG Yunjian2
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(1. School of Chemistry and Environmental Science, Shangrao Normal University, Shangrao 334000,China; 2. School of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, China)
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| Abstract: |
| CaMoO4:Eu3+ nanophosphors with different concentrations of Eu3+ were prepared by hydrothermal method. A series of experiments were conducted to investigate the effect of reaction temperature, time, and Eu3+ doping concentration on the nanoparticle size and optical properties. The phase structure, morphology, and optical property of the samples were systematically characterized by XRD, SEM, FT-IR, UV-Vis, and PL spectra. Results indicated that the synthesized red phosphors of CaMoO4:Eu3+ were scheelite structure. On the one hand, with the decline of hydrothermal reaction temperature or reaction time, CaMoO4:Eu3+ nanocrystals showed a decreasing tendency of nanocrystals sizes, resulting in the gradually decline of the luminous intensity and the occurrence of bule shift on the UV-Vis absorption edge. On the other hand, with the increase of Eu3+ doping concentration, the average particle size of CaMoO4:Eu3+ nanocrystals decreased and the UV-Vis absorption band of the samples had red shift. Moreover, CaMoO4:Eu3+ nanophosphors could be excited by a wavelength of 275 nm light and exhibited a strong red emission at 614 nm of 5D0→7F2, showing the fluorescence quenching molar concentration of Eu3+ at 6%. |
| Key words: CaMoO4 Eu3+ doping hydrothermal synthesis optical properties |
