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以Cd(NO3)2·4H2O和Na2WO4·2H2O为原料,采用水热法合成了高荧光性CdWO4纳米棒,并通过X射线粉末衍射、扫描电子显微镜及荧光光谱对其进行了表征,系统地研究了体系的p H值及乙醇添加量对合成产物的物相、形貌和下转换发光性能的影响。结果表明:在p H值为5~9的范围内,能得到单斜晶系的CdWO4纳米棒,当激发波长为297nm时,所得样品均在400~550 nm有很强的发射峰。在水体系中引入乙醇后,所得Cd WO4纳米棒变细,随着乙醇量的增加,样品发光强度逐渐增大。
Cd (NO3) 2.4H2O and Na2WO4.2H2O were synthesized by hydrothermal method and characterized by X-ray powder diffraction, scanning electron microscopy and fluorescence spectroscopy. The influence of the p H value of the system and the amount of ethanol added on the phase, morphology and luminescence properties of the synthesized product were investigated. The results show that the monoclinic CdWO4 nanorods can be obtained in the range of pH ranging from 5 to 9. When the excitation wavelength is 297 nm, the obtained samples all have strong emission peaks at 400-550 nm. After ethanol was introduced into aqueous system, the resulting Cd WO4 nanorods became thinner. With the increase of the amount of ethanol, the luminescence intensity of samples increased.