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中文摘要：
本文以钼酸钠、硫代乙酰胺为前驱体,硅钨酸为添加剂,成功用水热法合成高纯度纳米花状二硫化钼。产物特性用X射线衍射（XRD）、能量色散谱（EDS）、扫描电子显微镜（SEM）进行表征。 XRD和EDS图显示实验产物为二硫化钼,且其结晶度和层状堆垛良好。 SEM图谱则表明二硫化钼为纳米花状结构,颗粒直径300 nm左右,由几十上百片花瓣组成,每片花瓣厚度十个纳米左右。通过以硅钨酸为变量的梯度实验,研究发现,硅钨酸对于纳米花状MoS2的形成具有重要作用,不添加硅钨酸,无法形成纳米花状MoS2,此外,硅钨酸的剂量会影响合成MoS2的大小和形貌。本文还对纳米花状二硫化钼的形成机理做了初步的讨论。
英文摘要：
High-purity flower-like MoS2 microspheres have been successfully synthesized by hydrothermal method using Na2MoO4 and CH3CSNH2 as precursors, and HaO40SiW12 as an additive. Samples are characterized by X-ray powder diffraction （XRD）, scanning electron microscopy （SEM）, and energy dispersive spectrometer （EDS）. XRD and EDS pat- terns show that the as-prepared samples are MoSs, which have good crystallinity with a well-stacked layered structure. SEM images show that the as-prepared MoS2 are composed of flower-like microspheres with a mean diameter about 300 nm, the structures of which are constructed from dozens of hundreds of MoS2 nano-sheet with a thickness of several nanometers. It is also found that the silicotungstic acid plays an important role in the formation of the flower-like MoSs microspheres, which could affect the size and morphology of the MoS2. Flower-like MoSs is not found in the as-prepared product without adding silicotungstic acid. A formation mechanism of MoS2 microspheres is tentatively given.
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