Electrospinning Preparation, Structure, and Photoluminescence Properties of YBO3:Eu3+ Nanotubes and Nanowires

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• 作者：Hongwei Song ; HongQuan Yu ; Guohui Pan ; Xue Bai ; B. Dong ; X.T Zhang ; S. K. Hark
• 刊名：Chemistry of Materials
• 出版年：2008
• 出版时间：July 22, 2008
• 年：2008
• 卷：20
• 期：14
• 页码：4762 - 4767
• 全文大小：1731K
• 年卷期：v.20,no.14(July 22, 2008)
• ISSN：1520-5002

文摘

A novel method, electrospinning, was explored to prepare europium-doped YBO₃ nanocrystalline phosphors. Narrow and size-controllable YBO₃ nanotubes and nanowires were obtained, varying from 40 to 500 nm. The average wall thickness of the nanotubes was only 5−10 nm. The structural properties were characterized by X-ray diffraction (XRD), Fourier-transform infrared absorption (FTIR), electron spin resonance (ESR), field emission scanning electron micrographs (FE-SEM), and high-resolution transmission electron micrographs (HR-TEM). The results indicate that theYBO₃ nanotubes and nanowires were hexangular in phase and single crystals or polycrystalline in structure. Some surface dangling bonds caused by transition metal ions lead to a change of the coordination number of boron from +3 to +4. The photoluminescent properties of the YBO₃: Eu³⁺ nanowires and nanotubes were also characterized. It was observed that the charge-transfer excitation bands of Eu³⁺ in the nanowires and nanotubes blue-shifted in contrast to those in bulk, because of the variation of coordination environments.