Liu Fengzhen, Shao Xin, Yin Yibin, Zhao Limin, Jia Zhengfeng, Sun Qiaozhen, Shao Zhuwei, Liu Xuehua, Meng Xianhua
College of Materials Science and Engineering, Liaocheng University, Liaocheng 252059, China.
J Nanosci Nanotechnol. 2011 Nov;11(11):9684-9. doi: 10.1166/jnn.2011.5244.
Eu3+-doped REVO4 nanphosphors were controllably synthesized by an EDTA-mediated hydrothermal method at 180 degrees C using RE(NO3)3 and Na3VO4 as precursors. The obtained products were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectrometry (FTIR), X-ray photoelectron spectra (XPS), and photoluminescence spectroscopy (PL). The XRD results showed that the products were pure tetragonal structure and no other impurity phase appeared. The PL studies demonstrated Eu3+ ions doping effectively enhanced luminescent properties of LaxRE(1-x)VO4 and YxRE(1-x)VO4 nanoparticles, but EU3+ ions doping did not enhance luminescent properties of CexRE(1-x)VO4 (x not equal 0) nanoparticles. The prepared phosphors showed well-defined red luminescence due to radiative transitions from 5D0 to 7F(J) (J = 1,2) levels of Eu3+ ions, respectively. Furthermore, we reported Eu3+-doped CexRE(1-x)VO4 (x not equal 0) phases represented a new class of optically inactive materials.
采用以RE(NO₃)₃和Na₃VO₄为前驱体的乙二胺四乙酸（EDTA）介导水热法，在180℃可控合成了Eu³⁺掺杂的REVO₄纳米磷光体。通过X射线粉末衍射（XRD）、扫描电子显微镜（SEM）、傅里叶变换红外光谱（FTIR）、X射线光电子能谱（XPS）和光致发光光谱（PL）对所得产物进行了表征。XRD结果表明产物为纯四方结构，未出现其他杂质相。PL研究表明，Eu³⁺离子掺杂有效增强了LaxRE(1 - x)VO₄和YxRE(1 - x)VO₄纳米颗粒的发光性能，但Eu³⁺离子掺杂并未增强CexRE(1 - x)VO₄（x≠0）纳米颗粒的发光性能。所制备的磷光体由于Eu³⁺离子分别从⁵D₀到⁷F(J)（J = 1,2）能级的辐射跃迁而呈现出清晰的红色发光。此外，我们报道Eu³⁺掺杂的CexRE(1 - x)VO₄（x≠0）相代表了一类新型的光学惰性材料。
