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本文以普通硫粉和钼酸钠为原料,通过两相法在170-200°C下经8 h制备得到二硫化钼纳米片,同时基于聚集-聚并模型提出其三步法生长机理。其中,硫粉的再组装保证了其向H_2S的转化,使钼酸钠得以还原,因此在本方法中起到关键作用。本法制备得到的硫化钼纳米片富含可能由于各种位错引起的未饱和硫原子,有利于其在催化加氢等领域的应用。此外,由于二维过渡金属硫族化合物结构相似,所以本方法及其机理可能同样适用于其他二维过渡金属硫族化合物。本方法为绿色、便捷制备二硫化钼纳米片提供了一个选择。
In this paper, the ordinary sulfur powder and sodium molybdate were used as raw materials, and the molybdenum disulfide nanosheets were prepared by two-phase method at 170-200 ° C for 8 h, and the three-step growth mechanism was proposed based on the aggregation-aggregation model. Among them, the re-assembly of sulfur powder to ensure its conversion to H2S, sodium molybdate can be reduced, and therefore play a key role in this method. The molybdenum sulfide nanoplatelets prepared by the method are rich in unsaturated sulfur atoms which may be caused by various dislocations and are favorable for application in the fields of catalytic hydrogenation and the like. In addition, since the two-dimensional transition metal chalcogenides are similar in structure, the present method and its mechanism may be equally applicable to other two-dimensional transition metal chalcogenides. The method provides a green and convenient preparation of molybdenum disulfide nanosheets.