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Issue 2, 2011
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Morphological control and luminescence properties of lanthanide orthovanadate LnVO4 (Ln = La to Lu) nano-/microcrystals viahydrothermal process

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Abstract

Lanthanide orthovanadate LnVO4 (Ln = La to Lu) nano-/microcrystals with multiform crystal structures (monoclinic and tetragonal) and morphologies (separated nanoparticles, micropancake, microdoughnut and spherical aggregates) were successfully synthesized by a facile, effective, and environmentally friendly hydrothermal method. X-Ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, photoluminescence spectra, low-voltage cathodoluminescence, and kinetic decays were used to characterize the samples. The experimental results indicated that the use of the organic additive trisodium citrate (Cit3−) has an obvious impact on the morphologies of the products. The possible formation mechanisms for LnVO4 nano-/microcrystals with diverse well-defined morphologies have been presented in detail. Additionally, we systematically investigate the luminescent properties of the LuVO4:Ln3+ (Ln = Eu, Sm and Dy). Due to an efficient energy transfer from vanadate groups to the dopants, LuVO4:Ln3+ (Ln = Eu, Sm and Dy) phosphors showed the strong characteristic emission of Ln3+ under ultraviolet excitation and low-voltage electron beam excitation. Furthermore, the PL emission color of LuVO4:Ln3+ (Ln = Eu, Sm and Dy) phosphors can be tuned from blue to red, orange-red, and green easily by partial replacement VO43 with PO43 and changing the doping concentrations (x) of Ln3+.

Graphical abstract: Morphological control and luminescence properties of lanthanide orthovanadate LnVO4 (Ln = La to Lu) nano-/microcrystals viahydrothermal process

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Publication details

The article was received on 02 May 2010, accepted on 12 Jul 2010 and first published on 08 Sep 2010


Article type: Paper
DOI: 10.1039/C0CE00161A
Citation: CrystEngComm, 2011,13, 474-482
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    Morphological control and luminescence properties of lanthanide orthovanadate LnVO4 (Ln = La to Lu) nano-/microcrystals viahydrothermal process

    Z. Xu, C. Li, Z. Hou, C. Peng and J. Lin, CrystEngComm, 2011, 13, 474
    DOI: 10.1039/C0CE00161A

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