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Synthesis and Characterization of LnPO4 · nH2O (Ln = La, Ce, Gd, Tb, Dy) Nanorods and Nanowires

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Aqueous precipitation method has been used to synthesize lanthanide orthophosphates LnPO4 · nH2O (Ln = La, Ce, Gd, Tb, Dy) with high purity and yield. It has been shown by XRD, TGA, and FTIR characterization that the as-synthesized samples are the LnPO4 hydrates (LnPO4 · nH2O) with hexagonal rhabdophane-type structure. The X-ray diffraction peaks and absorption of PO3−4 groups show a systematic shift from LaPO4 · nH2O to DyPO4 · nH2O due to the effect of lanthanide ionic contraction. The value of n in LnPO4 · nH2O depends on the lanthanide element and synthetic condition. Field-emission scanning electron microscopy observations show the morphology of as-synthesized samples, which consist entirely of nanorods/nanowires with diameters of 30–100 nm and lengths ranging from several hundreds of nanometers to several micrometers. The anisotropic growth of crystals should be responsible for the formation of nanorods/nanowires, which is related to the hexagonal crystal structure.
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Keywords: AQUEOUS PRECIPITATION; CHARACTERIZATION; LUMINESCENCE; NANOMATERIALS; RARE EARTH

Document Type: Research Article

Publication date: 2007-10-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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