1. Dalian Institute of Chemical Physics, DMFC, Chinese Academy of Science, Dalian 116023, China 2. Dalian Institute of Chemical physics, SKLC, Chinese Academy of Science, Dalian 116023, China 3. Chemistry Department of Liaoning Normal University, Dalian 116029, China
Abstract：Nanosized LnVO4:Eu (Ln=La, Gd, Y) with diameters ranging from 20 to 50 nm were synthesized by complex sol-gel technique. The structures and spectral properties of LnVO4:Eu were studied by X-ray powder diffraction (XRD), Fourier transform (FT-IR) spectroscopy, luminescence spectra and ultraviolet spectroscopy (UV). The experimental results show that YVO4:Eu and GdVO4:Eu have similar spectral properties because they both have the structure of xenotime, while the structure of LaVO4:Eu belongs to monazite, whose symmetry is inferior to the former vanadates. Consequently the spectral properties of LaVO4:Eu are obviously different from the other two luminescence materials, as the peaks of infrared spectrum and emission spectrum become wider and the number of peaks in UV-Vis spectrum increases.
[1] ZENG Xiao-qing, HONG Guang-yan(曾小青，洪广言). Chinese. J. Lumin(发光学报)，2001, 22: 55. [2] Anitha M, Ramakrishnan P, Chatterjee A. Appl Phys.，2002, A74：153. [3] Michael A Aia. J. Electrochem. Soc., 1967, 114(4): 367. [4] Catherine E Rice, William R Robinson. Acta Cryst.，1976, 32: 2232. [5] Donald F Mullica, Sappenfield E L, Abraham M M, Chakoumakos B C. Inorg. Chimi. Acta, 1996, 248: 85. [6] Bryan C Chakoumakos, Marvin M Abraham, Lynn A Boatner. J. Solid. State. Chem., 1994, 109: 197. [7] Frank C Palilla, Albert K Levine，Maija Rikerics. J. Electrochem. Soc., 1965, 112(8): 776.
