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LnPO4: RE3+ (La = La, Gd; RE = Eu, Tb) nanocrystals: solvo-thermal synthesis, microstructure and photoluminescence

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Abstract

Through altering the solvents, we have obtained the Eu3+/Tb3+ ions-doped LnPO4 (Ln = La, Gd) phosphors with different particle sizes, microstructures and morphologies via a facile solvo-thermal technology. X-ray powder diffraction (XRD), transmission electron microscope (TEM), and scanning electron microscope (SEM) have shown that the products using different solvents have various structures and morphologies. With the increase of DMA/water volume ratio, the microstructure has changed from hexagonal phase to monoclinic one, and the morphology from nanorod to nanoparticle, revealing the decreased oriented growth. The presence of DMA is an important factor in guiding the anisotropic growth of hexagonal lanthanide phosphates. Besides, N-methyl-2-pyrrolidone has been used as solvent to induce the Eu3+/Tb3+ ions-doped LnPO4 (Ln = La, Gd) phosphors with different morphologies and structures. Finally, the photoluminescence behaviors of these nanocrystals have been investigated, which are dependent on their microstructures and morphologies.

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Acknowledgments

The work was supported by the Developing Science Fund of Tongji University, the National Natural Science Foundation of China (20971100) and Program for New Century Excellent Talents in University (NCET-08-0398).

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Authors and Affiliations

  1. Department of Chemistry, Tongji University, Siping Road 1239, Shanghai, 200092, China

    Bing Yan, Jianfeng Gu & Xiuzhen Xiao

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  1. Bing Yan
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  2. Jianfeng Gu
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Correspondence to Bing Yan.

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Yan, B., Gu, J. & Xiao, X. LnPO4: RE3+ (La = La, Gd; RE = Eu, Tb) nanocrystals: solvo-thermal synthesis, microstructure and photoluminescence. J Nanopart Res 12, 2145–2152 (2010). https://doi.org/10.1007/s11051-009-9776-x

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