【摘要】 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50～80nm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.更多还原

【Abstract】 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 gly- col-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 sul- fur 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 success- fully 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.更多还原