水热法制备NaSm(MoO_4)_(2-x)(WO_4)_x固溶体微晶及其发光性能  

Hydrothermal Synthesis of NaSm(MoO_4)_(2-x)(WO_4)_x Microcrystallines and Their Luminescent Properties

作　　者：梁鸿霞[1] 李涛[1,2] 吴云[2] 赖欣[2] 毕剑[2] 高道江[2] 

机构地区：[1]攀枝花学院资源与环境工程学院,四川攀枝花617000 [2]四川师范大学化学与材料科学学院,四川成都610066

出　　处：《四川师范大学学报（自然科学版）》2015年第1期109-113,共5页Journal of Sichuan Normal University（Natural Science）

基　　金：电子薄膜与器件国家重点实验室开放课题(KFJJ201109);四川省教育厅成果转化项目(11ZZ013);四川省教育厅自然科学重点项目(12ZA142)资助项目

摘　　要：采用水热法制备了NaSm(MoO4)2-x(WO4)x微晶.通过X射线粉末衍射(XRD)、扫描电镜(SEM)和荧光分析(FL)等技术对微晶的晶相结构、形貌和发光性能进行了表征.探究了x变化对微晶的微结构和光学性能的影响.结果表明:制备的Na Sm(MoO4)2-x(WO4)x微晶皆为白钨矿结构;随着x的增大,微晶由近似块状逐渐变成规整的纺锤体,微晶颗粒先增大后减小.在450 nm光激发下,微晶在568和664nm处呈现Sm3+的特征发射峰,前者的强度远大于后者,表明Na Sm(MoO4)2-x(WO4)x微晶样品中Sm3+处在一个对称环境.当x=0.5时,获得的NaSm(MoO4)2-x(WO4)x微晶在568 nm处的发射峰强度最大.NaSm（ MoO4）2-x（WO4）xmicrocrystallines have been synthesized by hydrothermal method. The crystal structure,surface morphology and photoluminescence properties of the as-synthesized microcrystallines are investigated by X-ray diffraction（ XRD）,scanning electron micrograph（ SEM） and fluorescence analysis（ FL）. The influences of the variation of x on the microstructures and photoluminescence properties of the NaSm（ MoO4）2-x（WO4）xmicrocrystallines are discussed in detail. Results show that all the obtained NaSm（ MoO4）2-x（WO4）xmicrocrystallines have scheelite structure. With the increase of x,the morphology of the microcrystallines changes from block to regular spindle,and grain size of Na Sm（ MoO4）2-x（WO4）xmicrocrystallines initially increases and then decreases accordingly. Under the excitation of 450 nm light,the NaSm（MoO4）2-x（WO4）xmicrocrystallines exhibit the characteristic emission peaks of Sm^3＋at 568 nm and 664 nm. The emission intensity at 568 nm is much higher than that at 664 nm,suggesting that Sm3 ＋locates the symmetric environment in the lattices of NaSm（ MoO4）2-x（WO4）xmicrocrystalline. When x is 0. 5,the peak intensity of NaSm（ MoO4）2-x（WO4）xat 568 nm reaches its maximum.

关 键 词：NaSm(MoO4)2-x(WO4)x微晶 水热法 制备 发光性能 

分 类 号：O482.31[理学—固体物理]