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Synthesis of Highly Luminescent and Anion-Exchangeable Cerium-Doped Layered Yttrium Hydroxides for Sensing and Photofunctional Applications

Authors

  • Yang Xiang,

    1. Department of Physics, Key Laboratory of Artificial, Micro- and Nano-structures of Ministry of Education, and School of Physics and Technology, Wuhan University, Wuhan 430072, P. R. China
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  • Xue-Feng Yu,

    Corresponding author
    1. Department of Physics, Key Laboratory of Artificial, Micro- and Nano-structures of Ministry of Education, and School of Physics and Technology, Wuhan University, Wuhan 430072, P. R. China
    • Department of Physics, Key Laboratory of Artificial, Micro- and Nano-structures of Ministry of Education, and School of Physics and Technology, Wuhan University, Wuhan 430072, P. R. China.
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  • Ding-Fei He,

    1. Department of Physics, Key Laboratory of Artificial, Micro- and Nano-structures of Ministry of Education, and School of Physics and Technology, Wuhan University, Wuhan 430072, P. R. China
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  • Zhengbo Sun,

    1. State Key Laboratory of Virology College of Life Sciences, Wuhan University, Wuhan 430072, P. R. China
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  • Zhijian Cao,

    1. State Key Laboratory of Virology College of Life Sciences, Wuhan University, Wuhan 430072, P. R. China
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  • Qu-Quan Wang

    1. Department of Physics, Key Laboratory of Artificial, Micro- and Nano-structures of Ministry of Education, and School of Physics and Technology, Wuhan University, Wuhan 430072, P. R. China
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Abstract

The discovery of new lanthanide properties in layered rare-earth hydroxides is tremendously important to developing novel materials with the advantages of both lanthanides and layered hydroxides. Herein, a polyethylenimine-assisted hydrothermal route for preparing Ce-doped layered yttrium hydroxide nanoplates (LYH:Ce NPs) is established, in which the Ce doping provides simultaneous control of the size and fluorescent properties. Typically, 10% Ce doping tailors the average particle size from 680 to 196 nm and induces bright blue luminescence with a quantum efficiency of over 10.0%. Owing to the much more efficient f–d Ce3+ transition, the LYH:Ce NPs show three orders of magnitude stronger photoluminescence than LYH:Eu and LYH:Tb NPs, and exhibit the properties required to fabricate switched “on/off” optical sensors by controlling the Ce3+ ↔ Ce4+ redox couple. Furthermore, by combining the merits of the luminescence of Ce3+ dopants and anion-exchange ability of an LYH host, the LYH:Ce NPs exhibit the properties necessary for photofunctional materials for photosensitized singlet oxygen production.

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