Zn-ZnO核-壳间隙结构的低温水浴合成与表征

Fabrication and Characterization of Zn-ZnO Core-shell Gap Structure in Low-temperature Water-bath Process

通过低温(60°C)水浴合成路线,在油酸-无水乙醇混合溶液存在的条件下,制备出Zn-ZnO核-壳间隙结构,以原料Zn球为核,并对产物直径大小产生直接影响,而沿[001]晶面生长的ZnO纳米棒为壳,棒直径为80～150nm,而且核-壳之间存在一定的间隙空间.适当的改变合成条件,可以得到不同形态的Zn-ZnO核-壳结构.通过XRD、SEM、TEM和FT-IR等分析手段,对产物结构和性能进行了不同的分析,并对Zn-ZnO核-壳结构的形成机理进行了讨论.结果表明,加入油酸-无水乙醇混合液对形成核-壳结构的间隙空间起到了重要的作用,而外壳的ZnO棒尺寸大小可通过磁力搅拌来控制。

Core-shell gap structure of Zn-ZnO nanomaterials consisted of Zn sphere core and ZnO nanorods shell was synthesized by low-temperature water-bath process using oleic acid-ethanol（OA-ALKY） as assistant.The sizes of the products depended on the diameter of Zn spheres and the ZnO nanorods which formed on the shell grew along the [001] direction with a diameter of 80-150nm.Changing the reaction conditions could get different core-shell structures.Besides,these structures were characterized by X-ray diffraction（XRD）,scanning electron microscope（SEM）,transmission electron microscope（TEM） and Fourier transform infrared spectroscope（FT-IR）,consequently the growth mechanism of the structures were proposed.The result indicates that adding oleic acid and ethanol mixture plays an important role in forming gap space of the core-shell structure,and the size of ZnO nanorods of the shell can be controlled by magnetic stirring.