摘要
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
基金
国家自然科学基金资助课题!No.59572031
19772049
关键词
表面修饰
铁钠米粒子
硼氢化钾
电化学反应
In-situ surf are modification Metal α-Fe nanoparticles Multilayer nanocompqsitestructure