鱼骨状LaVO4:Eu3+纳米晶的水热合成和荧光性能

中国有色金属学报, 2009, 19(1): 119-126.

鱼骨状LaVO4:Eu3+纳米晶的水热合成和荧光性能

刘国聪 ^1, , 段学臣 ^2, , 李海斌 ^3, , 董辉 ^4, , 朱立刚 ^5, , 梁达文 ^6,

1.中南大学,材料科学与工程学院,长沙,410083;玉林师范学院,化学系,玉林,537000

2.中南大学,材料科学与工程学院,长沙,410083

3.中南大学,材料科学与工程学院,长沙,410083

4.玉林师范学院,化学系,玉林,537000

5.中南大学,材料科学与工程学院,长沙,410083;玉林师范学院,化学系,玉林,537000

6.玉林师范学院,化学系,玉林,537000

基金项目: 广西青年基金(0728107) 广西教育厅基金(200608MS024) 湖南省自然科学基金(08JJ3104)

关键词：鱼骨状LaVO4 , Eu3+纳米晶 , 液相合成 , 光致发光 , 荧光性能

Hydrothermal synthesis and luminescent properties of fishbone-like Eu3+-doped LaVO4 nanocrystals

在弱碱性溶液中,采用改进的水热法合成鱼骨状LaVO4和LaVO4"Eu3+纳米晶体.用X射线衍射、透射电镜、高分辨透射电镜、紫外-可见光和荧光光谱(PL)研究样品的结构和发光性能,并探讨溶液pH值、反应时间和反应温度对产品形貌和颗粒大小的影响.结果说明:前驱体溶液的pH值对产品形貌起关键作用,而反应时间和温度仅改变产品颗粒的尺寸;水热反应有助于鱼骨状LaVO4:Eu3+晶体从单斜独居石型结构向四方锆石型的转变,而掺杂Eu3+的LaVO4的晶格对称性下降,而其荧光性却得到加强.

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