水热法合成CdWO_4纳米棒及其光致发光性能  

HYDROTHERMAL PREPARATION AND LUMINESCENCE OF CdWO_4 NANORODS

作　　者：易小红[1] 俞建长[1] 李金土[1] 于佳[1] 

机构地区：[1]福州大学材料科学与工程学院,福州350108

出　　处：《硅酸盐学报》2010年第2期211-214,共4页Journal of The Chinese Ceramic Society

基　　金：福建省自然科学基金(2008J0146)资助项目

摘　　要：以硝酸镉、钨酸钠为原料,十二烷基苯磺酸钠(sodium dodecyl benzenesulfonate,SDBS)为表面活性剂,采用水热法制备了钨酸镉(CdWO4)纳米棒。利用X射线衍射、场发射透射电镜和荧光光谱测试对样品进行表征。初步分析了SDBS浓度对CdWO4纳米粉末的微观形貌及其性能的影响,并探讨了其可能的形成机理。结果表明:当SDBS的浓度为0.002mol/L时,得到短柱状CdWO4纳米粉末,随着SDBS浓度增大,制得的CdWO4纳米棒长径比增大;当SDBS浓度为0.2mol/L时,得到长柱状CdWO4纳米棒,其长径比为20～25。在300nm波长激发下,短柱状和长柱状CdWO4纳米棒均有490nm的宽发射峰,且随着长径比的增大CdWO4纳米棒的光致发光性能增强。Cadmium tungstate （CdWO4） nanorods were synthesized from cadmium nitrate and sodium tungstate,via a hydrothermal method with the presence of sodium dodecyl benzenesulfonate （SDBS）,The morphology and properties of the synthesized products were characterized by X-ray diffraction,field transmission electron microscopy and fluorescence light spectrum examination.Possible mechanism of fabricating CdWO4 nanorods was investigated.When the concentration of SDBS is 0.002 mol/L,the synthesized product is short columnar-shaped CdWO4 particles.Their aspect ratio increases with the increase of the concentration of SDBS.When the concentration of SDBS is 0.2 mol/L,the synthesized product is CdWO4 nanorods with long columnar in shape and its aspect ratio is 20-25.The short columnar-shaped CdWO4 and long columnar-shaped CdWO4 nanorods all display a very broad photoluminescent （PL） peak at 490 nm with the excitation wavelength of 300 nm,and the photoluminescent intensity of CdWO4 nanorods increases as aspect ratio increases.

关 键 词：钨酸镉 表面活性剂 水热法 纳米棒 

分 类 号：TB321[一般工业技术—材料科学与工程]