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Citrate-Gel Synthesis and Luminescent Properties of α-Zn_3(PO_4)_2 Doped with Eu^(3+)

Journal of Rare Earths 2004年第1期22卷 87-90页

作者：沈伟英林君于敏韩秀梅 Key Laboratory of Rare Earth chemistry and Physics

By using inorganic salts as raw materials and citric acid as complexing agent, α-Zn 3(PO 4) 2 and Eu 3+ doped α-Zn 3(PO 4) 2 phosphor powders were prepared by a citrate-gel process. X-ray diffraction (XRD), TG-DTA, FT-IR and luminescence excitation and emission spectra were used to characterize the resulting products. The results of XRD reveal that the powders begin to crystallize at 500 ℃ and pure α-Zn 3(PO 4) 2 phase is obtained at 800 ℃. And the results of XRD reveal that Eu 3+ exists as EuPO 4 in the powder. In the phosphor powders, the Eu 3+ shows its characteristic red-orange (592 nm, 5D 0- 7F 1) emission and has no quenching concentration.

关键词： optics solid state chemistry luminescence citrate-gel process α-Zn 3(PO 4) 2 EuPO 4 rare earths

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Synthesis and Characterization of Y_ (0.9-x)Gd_xEu_(0.1)BO_3 Phosphors by Spray Drying Process

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Journal of Rare Earths 2004年第1期22卷 91-94页

作者：王列松林君权泽卫 Key Laboratory of Rare Earth chemistry and Physics. Changchun Institute of Applied chemistry

Y 0.9-xGd xEu 0.1BO 3 phosphors were synthesized by spray drying (SD) method, and the results were compared with those by conventional solid state (SS) and citrate gel (CG) methods. The PL intensity of phosphors increases with the increase of x value in Y 0.9-xGd xEu 0.1BO 3 (prepared by SD) due to an energy migration process like Gd 3+-(Gd 3+) n-Eu 3+ occurred in the material. Compared with the latter two methods, the phosphor particles prepared by spray drying method have a better morphology, such as homogeneous size (about 1～3 μm) with spherical shape and smooth surface. Furthermore, the spray drying-derived phosphors have higher photoluminescence (PL) intensity than those by citrate gel method, but still a little lower than those by the solid state method.

关键词： optics solid state chemistry spherical phosphor spray drying rare earth borate

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Recent advances in the research of inorganic nanotubes and fullerene-like nanoparticles

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Frontiers of physics 2014年第3期9卷 370-377页

作者： Reshef Tenne Department of Materials and Interfaces Weizmann Institute Rehovot 76100 Israel

This minireview outlines the main scientific directions in tile research of inorganic nanotubes （1NT） and fullerene-like （IF） nanoparticles from layered compounds, in recent years. In particular, this review describes to some detail the progress in the synthesis of new nanotubes, including those from misfit compounds; core-shell and the successful efforts to scale-up the synthesis of WS2 multiwalt nanotubes. The high-temperature catalytic growth of nanotubes, via solar ablation is discussed as well. Furthermore, the doping of the 1F-MoS2 nanoparticles and its influence on the physiochemical properties of the nanoparticles, including their interesting tribological properties are briefly discussed. Finally, the numerous applications of these nanoparticles as superior solid lubricants and for reinforcing variety of polymers are discussed in brief.

关键词： inorganic nanotubes fullerene-like (IF) nanomaterials solid state chemistry

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