Thermal Stability and Optical Performance of CePO4 Nanowires

Abstract

Abstract: The hexagonal and monoclinic monazite CePO₄ nanowires with a narrow range of diameter distribution and large aspect ratio were synthesized mildly through hydrothermal process at 150 ℃ using CeCl₃·7H₂O and H₃PO₄ as the raw materials. The crystal structure, micro-morphology, and photoluminescence of the nanowires were characterized by XRD, TEM, HRTEM, and UV spectrophotometer. The results indicate that the diameter of hexagonal CePO₄ nanowires is approximately 40 nm, the length is 3 μm, while the diameter of monoclinic(monazite) CePO₄ nanowires is approximately 50 nm, the length can reach 20 μm and the nanowires are of high purity, homogeneity and well crystallinty. The crystalline phase of CePO₄ nanowires can be controlled simply by changing the hydrothermal reaction time. The crystalline phase of CePO₄ nanowires changes from hexagonal to monoclinic monazite while the reaction time increases. With the increase of calcining temperature, the width of CePO₄ nanowires increases, and the samples remain 1D morphology even after calcined at 1000 ℃, indicating the good thermal stability of the nanowires. The intensity of UV excited emission decreases while the calcining temperature increases.

Key words: Monazite cerium phosphate, Nanowire, Hydrothermal method, Thermal stability

CLC Number:

O614.33+2

TrendMD:

YANG Ru^*, LI Yu-Shu, ZHONG Xu-Feng, LI Min. Thermal Stability and Optical Performance of CePO₄ Nanowires[J]. Chem. J. Chinese Universities, doi: .

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Thermal Stability and Optical Performance of CePO₄ Nanowires

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