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在磷酸体系中,采用水热合成法通过调节PO43-/Ce3+摩尔比控制合成了一维CePO4纳米棒/线,发现了CePO4到CeO2的结构和形貌演变。利用X射线衍射、场发射扫描电镜、能谱分析和荧光光谱分析了产物的相结构、晶粒尺寸、形貌及发光性能。结果表明:随PO43-/Ce3+摩尔比的降低,CePO4纳米棒逐渐演变成纳米线,进而在更低的PO43-/Ce3+下由CePO4导向生成CeO2一维纳米棒。CePO4纳米棒/线在300～400nm范围内有较强的宽带发射,是属于Ce3+离子的5d-4f跃迁。CePO4纳米线的光致发光性能优于纳米棒。
In the phosphoric acid system, the one-dimensional CePO4 nanorods / wires were synthesized by hydrothermal synthesis by adjusting the molar ratio of PO43- / Ce3 +, and the structure and morphology evolution of CePO4 to CeO2 were found. The phase structure, grain size, morphology and luminescence properties of the product were analyzed by X-ray diffraction, field emission scanning electron microscopy, energy dispersive spectroscopy and fluorescence spectroscopy. The results show that with the decrease of PO43- / Ce3 molar ratio, CePO4 nanorods evolve into nanowires, and CePO4-guided one-dimensional nanorods are formed at lower PO43- / Ce3 +. CePO4 nanorods / lines have strong broadband emission in the range of 300-400 nm, which belongs to the 5d-4f transition of Ce3 + ions. The photoluminescence of CePO4 nanowires is better than that of nanorods.