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通过控制PO3-4/Tb3+的量比,在低温水热条件下合成了不同形貌的TbPO4·nH2O纳米晶体。采用X射线衍射仪(XRD)、场发射扫描电镜(FE-SEM)及光致发光光谱(PL)等分析手段对所制备的样品进行了表征。研究了溶液中PO3-4/Tb3+比值变化对产物晶型结构、形貌、晶粒尺寸及发光性能的影响,给出了TbPO4·nH2O纳米粉体的生长机理。实验发现,当PO3-4/Tb3+比值达到60∶1时,产物在过量的磷酸根体系中生长成直径为100~200 nm的TbPO4·nH2O茧状微球,且产物的发光强度最大。PO3-4/Tb3+比值对TbPO4·nH2O形貌和发光性能有重要影响。
By controlling the molar ratio of PO3-4 / Tb3 +, TbPO4 · nH2O nanocrystals with different morphologies were synthesized under low temperature and hydrothermal conditions. The prepared samples were characterized by X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM) and photoluminescence spectroscopy (PL) The effect of PO3-4 / Tb3 + ratio on the crystal structure, morphology, grain size and luminescence properties of the product was studied. The growth mechanism of TbPO4 · nH2O nanopowder was given. It was found that when the ratio of PO3-4 / Tb3 + was 60:1, the product grew into TbPO4 · nH2O with a diameter of 100-200 nm in excess of phosphate and the product had the highest luminescence intensity. The ratio of PO3-4 / Tb3 + has an important influence on the morphology and luminescence properties of TbPO4 · nH2O.