摘要
以稀土硝酸盐为原料,采用水热法合成油酸包覆的发红光Mn^(2+)掺杂NaYF_4:Yb^(3+)/Er^(3+)(Mn^(2+)doped-NaYF_4:Yb^(3+)/Er^(3+))上转换纳米粒子,然后以曲拉通磷酸酯为亲水性配体,通过配体交换法将油酸包覆的油分散性Mn^(2+)doped-NaYF_4:Yb^(3+)/Er^(3+)上转换纳米粒子转变成曲拉通磷酸酯包覆的水分散性纳米粒子.随后采用透射电子显微镜(TEM)、动态光散射仪(DLS)、X射线衍射仪(XRD)、荧光分光光度计、傅立叶变换红外光谱仪(FTIR)及热重分析仪(TGA)对合成样品进行表征.结果表明:曲拉通磷酸酯包覆的Mn^(2+)doped-NaYF_4:Yb^(3+)/Er^(3+)上转换纳米粒子平均粒径为19.54 nm,具有良好的水分散性.
Mn 2 + doped-NaYF 4 : Yb 3 +/Er 3+ nanoparticles are synthesized by one-step hydrothermal method using rare-earth nitrate as raw materials, and then the hydrophobic nanoparticles are transferred into water dispersible nanoparticles through the ligand-ex- change method using triton-phosphateas as the hydrophilic ligand. The samples are characterized with transmission electron microscopy (TEM), dynamic light scattering (DLS), X-ray diffraction (XRD), fluorescence spectrophotometer, Fourier transform infrared spec- troscopy (FTIR) and thermogravimetric analyzer (TGA). The results reveal that the average size of triton-phosphate modified Mn2+ doped-NaYF4 :Yb3+/Er3+ nanoparticles are about 19.54 nm and exhibit good water dispensability.
出处
《四川师范大学学报(自然科学版)》
CAS
北大核心
2017年第4期524-530,共7页
Journal of Sichuan Normal University(Natural Science)
基金
国家自然科学基金(50903011和51273220)