单斜结构纳米CePO4的控制合成与发光性能研究

摘要

利用水热法,调节反应体系中PO3-4/Ce3+摩尔比,低温控制合成了单斜结构CePO4纳米棒及花状纳米团簇.用XRD,FE-SEM,DSC-TG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.结果显示,随PO3-4/Ce3+摩尔比的增加,单斜结构CePO4的合成温度降低,其形貌由棒状演变为花状纳米团簇.当PO3-4/Ce3+摩尔比较低时,得到CePO4纳米棒;当PO3-4/Ce3+摩尔比较高时,得到花状纳米团簇.产物的荧光光谱分析显示一维纳米棒的光致发光性能优于花状纳米团簇.原料H3PO4可重复利用,降低了合成CePO4的成本.%The nanostructured CePO4 with monoclinic phase was controllably synthesized through a low temperature hydrothermal route by varying the reactant PO34- /Ce3+ molar ratio. The structures, morphologies, sizes and luminescence properties of the products were studied by XRD, FE-SEM, DSC-TG and photoluminescence spectra. With the PO34- /Ce3+ molar ratios increased, the synthesis temperature of as-synthesized monoclinic CePO4 was decreased, and the morphologies underwent the evolution from the rod-like nano－structures to the flower-like nanoclusters. When the PO34-/Ce3+ molar ratio was lower,CePO4 nanorods were obtained, while the PO34- /Ce3+ molar ratio was higher, the monoclinic CePO4 flower-like nanoclusters were crystallized. The photoluminescence spectrum showed that the CePO4 nanorods exhibit better photoluminescent property than the CePO4 flower-like nanoclusters. With the cycling use of phosphoric acid, the low-cost preparation of CePO4 could be achieved.