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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。
Cd (CdWO4) nanorods were prepared by hydrothermal method using cadmium nitrate and sodium tungstate as raw materials and sodium dodecyl benzenesulfonate (SDBS) as surfactant. The samples were characterized by X-ray diffraction, field emission transmission electron microscopy and fluorescence spectroscopy. The effects of SDBS concentration on the morphology and properties of CdWO4 nanopowders were analyzed preliminarily. The possible formation mechanism was also discussed. The results showed that when the concentration of SDBS was 0.002mol / L, a short columnar CdWO4 nanopowder was obtained. With the increase of SDBS concentration, the aspect ratio of CdWO4 nanorods was increased. When the concentration of SDBS was 0.2mol / L, Obtained long columnar CdWO4 nanorods, the aspect ratio of 20 ~ 25. The excitation of 300nm wavelength, short column and long columnar CdWO4 nanorods have 490nm wide emission peak, and with the aspect ratio CdWO4 nanorods enhanced photoluminescence properties.