一维Cu@C核壳结构纳米复合材料的制备与表征

以氯化铜作为铜源,六次甲基四胺(HMT)作还原剂和碳源,十六烷基三甲基溴化铵(CTAB)作表面活性剂,在水热条件下合成了一维Cu@C核壳结构纳米复合材料,并进行了表征分析。结果表明,制备的Cu@C核壳结构纳米复合材料为立方相铜晶体,无杂质出现。长度在几微米到十几微米,直径大约200~400 nm。产物由铜、碳2种元素构成;从透射电镜照片可以清楚的看出明暗对比,表明产物的核壳结构。在反应过程中,十六烷基三甲基溴化铵(CTAB)起到了形状控制剂的作用。

Synthesis and Characterization of One-dimensional Cu@C Core-shell Nanocomposites

One-dimensional Cu@C core-shell nanocomposites with copper as core and carbon as shell were synthesized by a simple,large-scale hydrothermal method using CuCl2 as copper source,hexamethylenetetramine(HMT) as reducing agent,C souce,and cetyltrimethylammonium bromide(CTAB) as surfactant.The obtained Cu@C nanocomposites were characterized by X-ray diffraction(XRD),field-emission scanning electron microscopy(FE-SEM),transmission electron microscopy(TEM) and UV-VIS spectrum analysis.XRD shows that the obtained product is cubic phase of Cu crystal.EDS shows that the Cu@C core-shell nanocomposites are composed of copper and carbon elements.SEM image shows that the product obtained have a length as long as dozens of microns and diameters of 200—400 nanometers.Dark/light contrast can be clearly observed along the radial direction by TEM image.In this process,CTAB plays an important role in the formation of these core-shell nanocomposites as a structure-directing agent.