论文部分内容阅读
通过简单的水热法制备了ZnO纳米棒,然后成功地在ZnO纳米棒上修饰了一层SnS壳层,形成了ZnO/SnS核壳结构纳米棒。利用X射线衍射、扫描电子显微镜和透射电子显微镜对上述核壳结构进行了表征。结果表明制备的ZnO纳米棒直径在20~200nm,长度达1μm,随着SnS壳层修饰时间的增加壳层厚度逐渐增加。PL分析表明,当SnS壳层厚度很薄时,由于ZnO纳米棒表面态得到了修复,ZnO纳米棒的PL强度得到了很好的提升;但当SnS壳层厚度达到一定程度后,该核壳结构会形成一种Ⅱ型能带排列,这样该核壳结构的PL强度反而会被降低。
ZnO nanorods were prepared by a simple hydrothermal method. Then, a SnS shell was successfully modified on ZnO nanorods to form ZnO / SnS core-shell nanorods. The core-shell structure was characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The results show that the prepared ZnO nanorods have a diameter of 20-200nm and a length of 1μm. The shell thickness increases with the increase of SnS shell modification time. PL analysis shows that the PL intensity of the ZnO nanorods is greatly improved due to the repaired surface state of the ZnO nanorods when the thickness of the SnS shell is very thin. However, when the thickness of the SnS shell reaches a certain level, The structure forms a Type II band arrangement so that the PL intensity of the core-shell structure is instead reduced.