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稀土化合物由于其独特的4f层电子结构和电子转移的多种方式,从而使之具有独特的光、电、磁学性质,稀土纳米材料的合成研究已成为当前纳米材料研究领域的重要课题.在本篇论文中主要采用水热法合成纳米微粒.将密闭反应器置于水溶液中进行加热,使反应体系中产生一个高温高压的环境,从而合成三棱柱形Y2O3:Eu.然后,通过X-粉末衍射(XR D),扫描电子显微镜(SEM)和荧光光谱(PL)对产品物相结构、形貌和荧光性能进行了表征,同时对比不同沉淀剂、pH值、反应物的浓度对Y2O3:Eu的影响.结果表明:用氨水将Y2O3:Eu的pH调为8时,生成物形貌独特,为三棱柱形,直径约为1微米,长约2微米,该产品的发射光谱发生蓝移,激发光谱发生红移.
Due to its unique 4f electronic structure and electron transfer, rare earth compounds have unique optical, electrical and magnetic properties, and the synthesis of rare earth nanomaterials has become an important issue in the field of nanomaterials research. In this paper, hydrothermal method is mainly used to synthesize nano-particles. The closed reactor is heated in an aqueous solution to generate a high-temperature and high-pressure environment in the reaction system to synthesize a triangular prism Y2O3: Eu. (XRD), scanning electron microscopy (SEM) and fluorescence spectroscopy (PL) were used to characterize the phase structure, morphology and fluorescence of the products. The effects of different precipitants, pH value and reactant concentration on the photocatalytic activity of Y2O3: Eu The results showed that when the pH of Y2O3: Eu was adjusted to 8 with ammonia water, the morphology of the product was triangular with a diameter of about 1 μm and a length of about 2 μm. The emission spectrum of the product was blue- Excitation spectrum redshift.