碳包覆铁铜合金纳米粒子的制备及其表征

Preparation and characterization of carbon encapsulated FeCu alloy nanoparticles

以蔗糖为碳源,硝酸铁、硝酸铜为金属源,采用液相还原-高温退火的方法成功制备了碳包覆铁铜合金纳米粒子.利用X射线衍射分析(XRD)研究了不同Fe、Cu摩尔配比下所制备样品X衍射花样.结果发现,利用当Fe/Cu摩尔比为1∶4时,所制备的样品物相单一.同时还利用能谱(EDS)、透射电子显微镜(TEM)、拉曼光谱(Raman)等测试方法对摩尔比为1∶4下所制备的样品的形貌、成分和结构进行了进一步的研究.结果表明:该摩尔比下,所制备的纳米粒子具有明显的核壳结构,金属核为FeCu4合金,平均粒径为43 nm;碳壳厚度约5 nm,以非晶态存在.

In this paper,carbon encapsulated FeCu alloy nanoparticles were prepared by using sucrose as carbon source and using ferric nitrate,copper nitrate as metal sources,through reducing liquid phase and annealing at high temperature.The samples with different mole ratio of Fe/Cu were studied by XRD.The results showed the phase of the sample with mole ratio of 1∶4 was pure.In addition,the as-prepared sample with mole ratio of 1∶4 was characterized by EDS,TEM and Raman.The result indicated that the sample was core/shell structure： the metal core consists of FeCu alloy（the average size was 43 nm）,the carbon shell was amorphous carbon with the thickness about 5 nm.