蒲公英状ZnO纳米结构的水热自组装及表征

Hydrothermal Self-assembly and Characterization of Dandelion-like ZnO Nanostructures

以柠檬酸为络合剂,在250℃成功地制备出新颖的蒲公英状氧化锌纳米结构。采用X射线衍射(XRD)、扫描电镜(SEM)和紫外可见光谱(UV-vis)等手段对产物晶体结构、形貌、光学和电学性能进行了表征,结果表明产物是由无数的氧化锌纳米薄片围绕某中心自组装而成的蒲公英状纳米结构,禁带宽度(Eg)约为3.61 eV,并对该纳米结构的自组装机理做了初步探讨。

Novel dandelion-like ZnO nanostructures were successfully synthesized via a simple citric acid （CA） assisted hydrothermal self-assembly process at 250oC. X-ray diffraction, scanning electron microscopy and UV-vis ,spectroscopy were employed to study the morphology, crystal structure, optical and electrical properties of the product. The results reveal that the product is dandelion-like ZnO nanostructures assembled from thousand of nanoflakes. Additionally, the energy band gap （Eg） of the nanostructures was found to 3.61 eV. Furthermore, the possible mechanism for the CA-assisted hydrothermal self-assembly of the nanostructures has been presented.