title: [Spectral studies of nanosized LnVO4:Eu (Ln = La, Gd, Y)].
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.
authors.affiliation: Dalian Institute of Chemical Physics, DMFC, Chinese Academy of Science, Dalian 116023, China.
authors.forename: Hong-wu
authors.initials: HW
authors.lastname: Zhang
authors.forename: Xiao-yan
authors.initials: XY
authors.lastname: Fu
authors.forename: Shu-yun
authors.initials: SY
authors.lastname: Niu
authors.forename: Yan
authors.initials: Y
authors.lastname: Han
authors.forename: Gong-quan
authors.initials: GQ
authors.lastname: Sun
authors.forename: Qin
authors.initials: Q
authors.lastname: Xin