硫纳米粒子的液相合成与表征

以硫粉为起始原料, 采用甲酸做沉淀剂、聚乙二醇-400为分散剂, 在常温、常压、液相条件下合成了硫纳米粒子. 对影响硫纳米粒子合成的条件进行了优化和分析, 考察了其在有机溶剂中的分散性. 用激光粒度分析仪测定产物的粒径分布, 透射电镜观察产物的形貌, X射线衍射仪分析产物的晶相. 结果表明, 用液相沉淀法成功地合成了颗粒均匀、粒径50～80 nm 的球形单斜相硫纳米粒子. 本方法条件温和、操作简单、成本低廉, 适用于工业化生产.

Synthesis and Characterization of Sulfur Nanoparticles by Liquid Phase Precipitation Method

Sulfur nanoparticles were prepared in liquid phase at normal pressure and room temperature. Sulfur powder was applied as original material, formic acid as precipitating agent, and polyethylene glycol-400 (PEG-400) as dispersing agent. The synthesis conditions of sulfur nanoparticles were optimized and analyzed, and its dispersion in organic solvent was studied. The particle size and crystalline structure of sulfur nanoparticles were characterized by laser size analysis device (LSA), transmission electron microscope (TEM) and X-ray diffractometer (XRD). The results show that monoclinic sulfur nanoparticles was successfully synthesized by liquid phase precipitation method. The sulfur nanoparticles are in sphere shape, and the average particle size is 50～80 nm. This method is a novel approach to produce nanosized sulfur particles, which could be applied to prepare sulfur nanoparticles in medicine and chemical industry.