摘要
采用了微乳液法制备ZnS纳米颗粒.该微乳液是以Span80-Tween60为复合表面活性剂,正丁醇为助表面活性剂,120#汽油为分散介质,乙酸锌水溶液为水相的反相微乳液体系.发现该微乳液的优化配比为22g汽油,4g复合表面活性剂(Span80-Tween60配比为1.11),正丁醇1.5mL,乙酸锌水溶液(1.2mol/L)的最大增溶量为6.3mL,在此微乳液中,逐滴加入适量Na2S水溶液并搅拌,于室温下反应30min后,对反应体系进行破乳、洗涤、分离,最后将产物浸泡在无水乙醇中,并对该产物的乙醇溶胶进行超临界干燥,得到白色疏松的纳米粉.用X射线衍射仪(XRD)和透射电子显微镜(TEM)对产物的组成、大小、形貌进行了表征,结果表明产物主要为立方晶体结构的ZnS,粒子大小均匀,粒径为10～20nm,且分散性良好.
ZnS nanoparticles wele prepared by inverse microemulsion method. The inverse microemulsion was composed of 120 g gasoline used as disperse mediums, Span80-Tween60 used as co-surfactant, n-butanol used as assistant, and zinc acetate aqueous solution used as water-phase. The optimum ratio of the microemulsion was： gasoline 22 g, co-surfactant （Span80 ： Tween60 = 1.1：1）4 g, n-butanol 1.5 mL, the maximum content of zinc acetate aqueous solution （1.2 mol/L） is 6.3 mL. In the microemulsion, proper quantity of Na2S aqueous solution was dripped into at indoor temperature. After stirring for 30 min, break the emulsion and wash, separate the products, immerse the products in anhydrous alcohol, and at last by taking supercritical fractionation, white loose nanoparticles were obtained. The products were characterized through X-ray powder diffraction（XRD） and Transmission Electron Microscopy（TEM）. The results showed that most products were ZnS with cubic structure. The size of nanoparticles is 10-20 nm, and the dispersity is good.
出处
《西安工业学院学报》
2005年第3期258-261,共4页
Journal of Xi'an Institute of Technology
基金
陕西省教育厅专项基金(03JK147)
