影像科学与光化学 ›› 2018, Vol. 36 ›› Issue (2): 161-170.DOI: 10.7517/j.issn.1674-0475.2018.02.005

• 论文 • 上一篇    下一篇

高荧光性纳米球状α-NaYF4:Ce3+/Tb3+的水热合成

陶萍芳, 冯玉琴, 周能, 覃利琴, 张培   

  1. 玉林师范学院 化学与食品科学学院 广西高校桂东南特色农产资源高效利用重点实验室 广西农产资源化学与生物技术重点实验室, 广西 玉林 537000
  • 收稿日期:2017-04-11 修回日期:2017-05-18 出版日期:2018-03-15 发布日期:2018-03-15
  • 通讯作者: 陶萍芳
  • 基金资助:
    玉林师范学院校级科研项目(2017YJKY25)

Hydrothermal Synthesis of α-NaYF4: Ce3+/Tb3+ Nanospheres with High Fluorescence Properties

TAO Pingfang, FENG Yuqin, ZHOU Neng, QIN Liqin, ZHANG Pei   

  1. Guangxi Key Laboratory of Agricultural Resources Chemistry and Biotechnology, Colleges and Universities Key Laboratory for Efficient Use of Agricultural Resources in the Southeast of Guangxi, College of Chemistry and Food Science, Yulin Normal University, Yulin 537000, Guangxi, P. R. China
  • Received:2017-04-11 Revised:2017-05-18 Online:2018-03-15 Published:2018-03-15

摘要: 以酒石酸钾钠(C4O6H4KNa)为原料和辅助剂,采用水热法合成了高荧光性能的立方相(α-)NaYF4:Ce/Tb3+荧光材料。利用X-射线衍射仪(XRD)、扫描电镜(SEM)、激光粒度仪、荧光分光光度计(FL)和傅立叶红外光谱(FTIR)对样品的结构和荧光性能进行了分析。结果表明:随着酒石酸钾钠添加量的增加,样品的物相由混合相[立方相(α-)和六方相(β-)]转变为纯立方相(α-)NaYF4:Ce3+/Tb3+,又转变为混合相(α+β),继而再转变为纯六方相(β-)NaYF4:Ce3+/Tb3+;SEM显示合成的混合相(α+β)NaYF4:Ce3+/Tb3+为六棱状微米柱和纳米球,而纯α-NaYF4:Ce3+/Tb3+为100 nm左右纳米球微粒,酒石酸钾钠对形貌的形成起着一定的控制作用。所合成的NaYF4:Ce3+/Tb3+最强发射峰位于543 nm,来源于Tb3+5D4-7F5的电子跃迁对应特征绿色发光;添加1.2 g酒石酸钾钠,180℃下水热反应24 h得到的纯α-NaYF4:5% Ce3+/5% Tb3+荧光性能最强。

关键词: &alpha, -NaYF4, 纳米球, 水热合成

Abstract: Cubic phase (α-)NaYF4:Ce3+/Tb3+ nanospheres with high fluorescence properties was synthesized by hydrothermal method using sodium potassium tartrate(C4O6H4KNa) as raw materials and assistant agent. The structure and fluorescence properties of the samples were characterize by X-ray diffraction (XRD), scanning electron microscopy (SEM), laser particle sizer,fluorescence spectrophotometer (FL) and fourier transform infrared spectrometer (FTIR). The results of XRD indicate that the synthesized NaYF4:Ce3+/Tb3+, adding with different quantities of potassium sodium tartrate, appeared different phase. The phase of product is mixed with cubic and hexagonal phase, and easily transformed to pure cubic phase or mixed with cubic and hexagonal phase again, and pure hexagonal phase finally, as the dosage of potassium sodium tartrate increases. SEM images show that the mixed phase of the NaYF4:Ce3+/Tb3+ appear two different morphologies, namely hexagonal prism micro-rod and nanosphere, and the cubic phase is only nanosphere about 100 nm in diameter. Sodium potassium tartrate plays an important role in the morphology control. The fluorescence display the green light emission of the synthesized NaYF4:Ce3+/Tb3+ peak at 543 nm mainly from the transition of Tb3+ between 5D4-7F5, under the excitation of 290 nm light. The fluorescence intensity of the pure α-NaYF4:5%Ce3+/5%Tb3+ by solvothermal treatment at 180℃ for 24 h, with the dosage of potassium sodium tartrate as 1.2 g, was significantly higher than that of the mixed phase(α+β) NaYF4:Ce3+/Tb3+ or pure hexagonal phase (β-) NaYF4:Ce3+/Tb3+.

Key words: NaYF4, nanospheres, hydrothermal synthesis