Hydrothermal synthesis and characterization of hexagonal and monoclinic CePO4 single-crystal nanowires

Zhang, Youjin; Guan, Hangmin

doi:10.1016/s0022-0248(03)01301-0

Cited by 90 publications

(54 citation statements)

References 20 publications

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“…[24] Various LnPO 4 nanostructures, including redispersible LnPO 4 nanoparticles and LnPO 4 ·n H 2 O nanowires/nanorods of some highly anisotropic polymorphs, have thus far been synthesized. [23][24][25][26][27][28][29] Despite these efforts, important issues, such as the fundamental relationship between crystal structure and the dynamic processes of anisotropic growth on the nanoscale, as well as exploration of the key factors governing the evolution of physical properties, are still in need of in-depth investigation.…”

Section: Introductionmentioning

confidence: 99%

Crystal Structures, Anisotropic Growth, and Optical Properties: Controlled Synthesis of Lanthanide Orthophosphate One‐Dimensional Nanomaterials

Yan

Sun

Wang

et al. 2005

Chemistry A European J

223

142

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The fundamental understanding of the relationship between crystal structure and the dynamic processes of anisotropic growth on the nanoscale, and exploration of the key factors governing the evolution of physical properties in functional nanomaterials, have become two of the most urgent and challenging issues in the fabrication and exploitation of functional nanomaterials with designed properties and the development of nanoscale devices. Herein, we show how structural and kinetic factors govern the tendency for anisotropic growth of such materials under hydrothermal conditions, and how the crystal structure and morphology influence the optical properties of Ln3+-doped nanocrystals. The synthesis of phase-pure and single-crystalline monoclinic, hexagonal, and tetragonal one-dimensional LnPO4 nanostructures of different aspect ratios by means of kinetically controlled hydrothermal growth processes is demonstrated. It is shown that the tendency for anisotropic growth under hydrothermal conditions can be enhanced simply by modifying the chemical potentials of species in the reaction solution through the use of carefully selected chelating ligands. A systematic study of the photoluminescence of various Eu3+-doped lanthanide phosphates has revealed that the optical properties of these nanophosphors are strongly dependent on their crystal structures and morphologies.

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Section: Introductionmentioning

confidence: 99%

Crystal Structures, Anisotropic Growth, and Optical Properties: Controlled Synthesis of Lanthanide Orthophosphate One‐Dimensional Nanomaterials

Yan

Sun

Wang

et al. 2005

Chemistry A European J

223

142

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“…Cerium phosphate (CePO 4 ) nanomaterial has received interest since the end of the 1960s [11]. It has luminescence property, therefore, it can be applied for luminescent lamp as highly efficient emitters of green light [12], optoelectronic devices [13], and ceramic applications [14]. CePO 4 has two crystal structures: hexagonal and monoclinic, which is controlled by the temperatures and synthesis methods.…”

Section: Introductionmentioning

confidence: 99%

“…CePO 4 has two crystal structures: hexagonal and monoclinic, which is controlled by the temperatures and synthesis methods. Hexagonal CePO 4 could be synthesized at low temperature [12][13]. The structural characteristics, such as size, morphology, crystal structure, and composition of the complex, have the influence on the physicochemical property.…”

Section: Introductionmentioning

confidence: 99%

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Microwave-assisted synthesis of CePO4 nanorod phosphor with violet emission

et al. 2011

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Monoclinic and hexagonal CePO 4 nanoparticles and nanorods were successfully synthesized from Ce(NO 3 ) 3 ·6H 2 O and Na 3 PO 4 ·12H 2 O solutions at pH 1-5 by a 180 W microwave radiation for 60 min. The products were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and scanning electron microscopy (SEM). XRD patterns revealed that the products are hexagonal CePO 4 structures at pH 2-5, and monoclinic CePO 4 structures at pH 1. SEM characterization shows that these products were nanoparticles, short nanorods, and long nanorods, controlled by the pH of the precursor solutions. Optical properties of the nanorods were also investigated by ultraviolet-visible (UV-vis) and photoluminescence (PL) spectroscopy.

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“…These compounds have typical CePO 4 monazite-type structure and belong to monoclinic symmetry (space group P2 1 /n) with four formula units in the lattice [7]. The authors [8] reported that monazite crystals synthesized by hydrothermal method at temperature of 373 and 473 K belong to hexagonal and monoclinic symmetry respectively. The XPS indicate that the phosphorus exists completely in the form of PO 3− 4 and cerium exists as Ce(III) with no Ce(IV) in all investigated crystals [8].…”

Section: Introductionmentioning

confidence: 99%

Electric properties of lithium-conducting solid electrolyte ceramics

Салкус¹

2006

Lithuanian J. Phys.

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The high temperature solid electrolyte Li1.3 1.7Sc0.3Ce1.7(PO4)3 (where is an absence of Li + ) compound was synthesized by a solid state reaction and studied by X-ray diffraction at room temperature. At room temperature the investigated compound belong to monoclinic symmetry (space group P21/n) with four formula units in the lattice. The ceramic samples were sintered at 923 K for 1 h. The surface of the ceramics was investigated by SEM and the chemical composition was tested by EDX. Complex impedance spectroscopy was performed in the frequency range from 10 −1 to 1.2·10 9 Hz in temperature range from 500 to 700 K. Three relaxation dispersions were found. The dispersions are related to the fast Li + ion transport in the grain boundaries and grains of the ceramics and to the processes at the Pt electrode-electrolyte interface.

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Hydrothermal synthesis and characterization of hexagonal and monoclinic CePO4 single-crystal nanowires

Cited by 90 publications

References 20 publications

Crystal Structures, Anisotropic Growth, and Optical Properties: Controlled Synthesis of Lanthanide Orthophosphate One‐Dimensional Nanomaterials

Crystal Structures, Anisotropic Growth, and Optical Properties: Controlled Synthesis of Lanthanide Orthophosphate One‐Dimensional Nanomaterials

Microwave-assisted synthesis of CePO4 nanorod phosphor with violet emission

Electric properties of lithium-conducting solid electrolyte ceramics

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