金属铁纳米粒子的液相制备、表面修饰及其结构表征

The Preparation, Surface Modification, and Characterization of Metallic α-Fe Nanoparticles

报道在表面活性剂存在的条件下于乙醇／水的简单液相体系中以ＡＮＨ。还原制备金属铁纳米粒子，然后再用含锌盐修饰溶液进行原位粒子的表面修饰，并通过Ｘ射线衍射（ＸＲＤ）、光电子能谱分析（ＸＰＳ）、透射电子显微分析（ＴＩＭ）、选区电子衍射（ＥＤ）表征和讨论所得产物粒子的形貌结构特征和粒子大小．结果表明，初始生成的金属铁纳米粒子与修饰溶液的电化学反应形成以金属纳米铁核为中心的具有较好稳定性的多层复合结构．

α-Fe nanoparticles were successfully prepaid by the reduction of Fe2+ by potassitunborohydride in sacly ethanol/Water system with the presence of surfaCtant. The voltnne percentage of ethanol in the system was 90%. The in--situ modification of the produced a Fe wasoperatal out taking advantage of the modaling solution induding Ni2+. The strUcturecharaCteristic and she of the particles produce were investigated by X-ray deduction(XRD),X-ray photoelectron spectrum(XPS), translnjssion electron microscopy (TEM) and electrondfuction (ED). The results of XRD and XPS showed that the in--situ displacement reactionbetween metal α-Fe nanopartides and Ni2+ made the produce nanopartides to be formed well stable multilayer nanocomposite structure Whose core are α-Fe nanopartides. The TEMimage illustratal that the produed nanoparticles were about 50urn in diameter and connwith each other to be filth-line due to the magnetism