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Issue 24, 2011
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Redox hydrothermal synthesis of cerium phosphate microspheres with different architectures

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Abstract

Uniform CePO4 microspheres are first synthesized via a highly efficient redox hydrothermal (RHT) route using unconventional tetravalent Ce(SO4)2·4H2O as the cerium source. Products obtained at 150 °C for 2h are hexagonal crystalline CePO4 microspheres with diameters ranging from 2 to 5 μm. By tuning the hydrothermal reaction time from 0 to 96 h, the morphologies of the obtained products undergo evolution from rodlike to spherelike and then to lamellar spherelike and lamellar star-shaped particles, accompanied by the phase transition from monoclinic Ce(H2O)(PO4)3/2(H3O)1/2(H2O)1/2 to pure hexagonal CePO4 and then to mixed phases of hexagonal and monoclinic CePO4. A possible growth mechanism based on dissolution–recrystallization was proposed. The photoluminescence properties were investigated and these CePO4 microspheres exhibit a narrower emission than that of CePO4 nanoparticles. In addition, Ln3+ (Ln = Eu, Dy, and Tb) doped CePO4 microspheres were also prepared, and their photoluminescent properties were studied.

Graphical abstract: Redox hydrothermal synthesis of cerium phosphate microspheres with different architectures

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Publication details

The article was received on 27 Mar 2011, accepted on 15 Jul 2011 and first published on 10 Oct 2011


Article type: Paper
DOI: 10.1039/C1CE05368J
Citation: CrystEngComm, 2011,13, 7284-7292
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    Redox hydrothermal synthesis of cerium phosphate microspheres with different architectures

    R. Yang, J. Qin, M. Li, Y. Liu and F. Li, CrystEngComm, 2011, 13, 7284
    DOI: 10.1039/C1CE05368J

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