油酸钠/Fe纳米粒子的制备及其脱氯性能研究  

Synthesis of sodium oleate/Fe nanoparticles and dechlorination of TCE in water

作　　者：李铁龙[1] 王丹[1] 金朝晖[1] 安毅[1] 李淑静[1] 孙丽莉[1] 

机构地区：[1]南开大学环境科学与工程学院

出　　处：《功能材料》2008年第8期1385-1388,共4页Journal of Functional Materials

基　　金：国家自然科学基金(20477019);天津市应用基础研究资助项目(07JCZDJC01800)

摘　　要：采用油酸钠作为包覆剂,在液相体系中制备油酸钠/Fe纳米复合粒子,并用TEM、XRD、FT-IR、DSC-TGA对所制得的纳米复合粒子进行结构表征。结果表明,油酸钠/Fe纳米复合粒子呈核壳结构,粒度分布窄,其粒径在90nm左右;FT-IR和DSC-TGA分析证明纳米铁与油酸钠之间发生了化学键合,具有空气稳定性,而且憎水亲油;将油酸钠/Fe纳米复合粒子与三氯乙烯(TCE)模拟水样反应,发现油酸钠/Fe纳米复合粒子能够与水相中的三氯乙烯(TCE)有良好的接触性,其脱氯效果优于未修饰的纳米铁粒子。Fe nanoparticles （nano Fe） was synthesized with a method of reduction in liquid phase, in which sodium oleate （which is a kind of surfactant） was added to change the physical property of the surface of the Nano Fe in order to meliorat it＇s stability in the air. Their structures,compositions and physical properties were characterized by TEM, XRD, FT-IR and DSC-TGA. The investigation showed that the nano Fe is coated with polystyrene core-shell, and stable in the air. The chemical reduction of TCE by nano Fe and sodium oleate modified nano Fe in aqueous solution were tested in series bath experiments,experiment results suggest that sodium oleate modified Nano Fe is better than nano Fe.

关 键 词：纳米铁 油酸钠 三氯乙烯 脱氯 空气稳定 

分 类 号：TB333[一般工业技术—材料科学与工程]