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Urea-assisted synthesis of AlPO4:Ce,Tb nanorods as a redox luminescence switch

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Abstract

AlPO4:Ce,Tb nanorods were synthesized by a facile hydrothermal method. The morphology of rod-like AlPO4 was tuned by varying urea concentrations, AlPO4 gradually changed from nanosheets to nanorods, and urea provided hydroxyl anion (OH−) in the aqueous solution to prepare the dispersed nanorods under the hydrothermal conditions. The emission intensity of nanorods increased significantly compared to that of nanosheets. AlPO4:Ce,Tb nanorods provided a novel redox luminescence switch on the basis of the reversible switching of the Ce3+/Ce4+ redox couple. The luminescence is quenched (off) when the system is in the oxidized form while it is restored (on) in the reduced form. The mechanism of the energy transfer and electronic transition between Ce3+ and Tb3+ in the AlPO4 nanorods was also discussed. This switch has biocompatibility and low toxicity, and may have a potential application in biomedical diagnostics and analysis.

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Acknowledgments

The Project was sponsored by the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry. This work was also supported by National Natural Science Foundation of China (20803096 and 21073238), the NSF of Hubei Province (Distinguished Young Investigator Grant 2010CDA082), and National Basic Research Program of China (Grant No: 2011CB211704).

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Authors and Affiliations

  1. Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, Hubei Province, South-Central University for Nationalities, Wuhan, 430074, People’s Republic of China

    Wei Yang & Juncheng Hu

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  1. Wei Yang
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  2. Juncheng Hu
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Correspondence to Juncheng Hu.

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Yang, W., Hu, J. Urea-assisted synthesis of AlPO4:Ce,Tb nanorods as a redox luminescence switch. J Nanopart Res 15, 1786 (2013). https://doi.org/10.1007/s11051-013-1786-z

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