发光学报, 2015, 36 (7): 775, 网络出版: 2015-08-25
微乳液法合成的Eu3+掺杂La2(MoO4)3材料及其发光性能
Preparation of La2(MoO4)3 by A Simple Microemulsion Method and Its Photoluminescence Properties
摘要
在微乳体系(十六烷基三甲基溴化氨/水/戊烷/戊醇)协助下, 采用钼酸钠和硝酸镧通过微乳反应制备了具有不同微结构的La2(MoO4)3。在表面活性剂CTAB浓度由0.2 mol/L增加到0.4 mol/L的过程中, La2-(MoO4)3的结构由蚕蛹状逐渐转变成近球形。经800 ℃煅烧处理4 h后的La2(MoO4)3∶Eu3+材料通过396 nm紫外光激发, 发射出由5D0→7F2的受迫电偶极跃迁产生的波长为617 nm红光, 且当Eu3+掺杂摩尔分数达到20%时, 发光强度达到最大。
Abstract
La2(MoO4)3 micro-materials with different morphologies were prepared by microemulsion reaction of sodium molybdate (Na2MoO4·2H2O) and lanthanum nitrate(La(NO3)3·6H2O) under the help of micro emulsion system. The morphology of La2(MoO4)3 samples gradually transform from oval shape to close spherical shape with the concentration of the surfactant of CTAB increasing from 0.2 mol/L to 0.4 mol/L. Under 396 nm excitation, La2(MoO4)3∶Eu3+ samples calcined at 800 ℃ for 4 h emit 617 nm red light due to the forced electric dipole transition of 5D0→7F2. The emission is strongest when the mole fraction of Eu3+ is up to 20%.
丁益, 方辉, 张峰君, 解文杰, 张奇才, 靳廷甲. 微乳液法合成的Eu3+掺杂La2(MoO4)3材料及其发光性能[J]. 发光学报, 2015, 36(7): 775. DING Yi, FANG Hui, ZHANG Feng-jun, XIE Wen-jie, ZHANG Qi-cai, JIN Ting-jia. Preparation of La2(MoO4)3 by A Simple Microemulsion Method and Its Photoluminescence Properties[J]. Chinese Journal of Luminescence, 2015, 36(7): 775.
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