LanthanoidsI 2800 DOI: 10.1002/chin.201121008

Uniform Hollow Lu2O3:Ln (Ln: Eu3+, Tb3+) Spheres: Facile Synthesis and Lumi-nescent Properties. — Carbon microspheres are hydrothermally obtained from aque-ous solutions of glucose (autoclave, 170 °C, 9 h) and used as templates in the synthesis of uniform hollow Lu2O3:Ln (Ln: Eu3+, Tb3+) spheres by reaction of Lu(NO3)3 and Ln(NO3)3 in the presence of urea (H2O, 90 °C, 4 h; calcination in air, 800 °C, 2 h). The samples are characterized by XRD, SEM, TEM, UV/VIS diffuse reflectance, photolu-minescence, and cathodoluminescence spectroscopy. The as-prepared phosphors have diameters of about 300 nm and shell thicknesses of approximate 20 nm. Upon UV and low-voltage electron beam excitation, the materials exhibit bright red (Eu3+) and green (Tb3+) luminescence, which may find potential applications in the fields of color display and biomedicine. The synthesis method is suitable for inexpensive mass production of the hollow Lu2O3:Ln phosphors. — (YANG, P.; GAI, S.; LIU, Y.; WANG, W.; LI, C.; LIN*, J.; Inorg. Chem. 50 (2011) 6, 2182-2190, http://dx.doi.org/10.1021/ic101605k ; Key Lab. Superlight Mater. Surf. Technol., Harbin Eng. Univ., Harbin 150001, Peop. Rep. China; Eng.) — W. Pewestorf

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