水热法合成二硫化钼纳米花

Hydrothermal Synthesis of Flower-Like MoS2 Nanoparticle

摘要:

MoS2纳米花以MoO3和Na2S为前驱体，在230℃下采用水热法反应6 h合成。MoO3为反应提供钼源，Na2S为反应提供硫源，同时还作为反应中的还原剂。产物通过XRD和SEM、Raman光谱表征其特性。MoS2纳米花是由几十到上百个花瓣组织构成的，平均花径约为200~300 nm，边缘厚度约为5~10 nm的薄片花瓣从一个中心向各个方向放射性生长。对比反应温度和盐酸的浓度的对合成MoS2纳米花的影响，结果表明其最佳实验条件为：反应温度为230℃，盐酸浓度为0.4 mol/L，反应时间为6 h。实验结果表明，采用此方法合成MoS2纳米花晶相纯，没有杂质且反应时间短，实验条件要求低。同时还探究了实验可能的反应原理。

Abstract: Flower-like MoS2 nanoparticles have been synthesized through a hydrothermal method which using MoO3 and Na2S as precursors reacting in 230˚C for 6 h. MoO3 works as the source of molybdenum for the reaction, and Na2S provides sulfur, it also works as the reducing agent of this reaction. The reaction product is characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Raman. The flower is composed of tens to hundreds of sets whose average diameter is 200 - 300 nm, the ultra-thin nanosheets of 5 - 10 nm in thickness is radioactive growth in all directions from a center. The influence of the reaction temperature and the concentration of hydrochloric acid on the formation of the flowers was evaluated. The optimal experimental conditions were determined as follows: reaction temperature of 230˚C, 0.4 mol/l HCl and reaction time of 6 h. The result shows that using this method to synthesize flower-like MoS2 nanostructure has many advantages: pure crystal phase, no impurities, less time for reacting, and low requirements of experimental conditions. The possible reaction route is discussed in this paper.