Preparation And Characterization Of Zinc Oxide Micro(Nano)-Structures

In this paper, circular flower-like ZnO with hierarchical structures, ZnO hollow microspheres assembled with nanorods, nano chip ZnO microcrystalline, the pompon ZnO microspheres and Ellipsodial TiO2microspheres were successfully prepared through a facile hydrothermal approach. The influence of fabrication conditions on the structure and morphology of ordered nanostuctures were characterized by SEM, XRD, PL and UV-Vis spectrometer. The growth mechanism was briefly discussed and experimental parameters were also studied.The results and conclusions are as followed.1. Circular flower-like ZnO with hierarchical structures were prepared by rection of Zn(NO3)2, Doped with silver under hydrothermal conditions. The morphologies and the structures were characterized by SEM. It has been found that the product consist of the obtained ZnO (micro) the nanostructure morphology different, better dispersion, Nanostructures of ZnO (micro) obtained a diameter of about4.5μm, We studied at room temperature photolμminescence properties of ZnO (micro) nanostructures. Room temperature photolμminescence spectrμm of the as-obtained ZnO hierarchitectures was recorded showing multiple peaks of visible emissions in bluegreen region. And detail examination of a variety of experimental conditions on the morphology of the product and the product of reaction mechanism.2. Sea urchin-like ZnO hollow microspheres were prepared by rection of Zinc metal, The ZnO hollow microspheres assembled by nanorods obtained by hydrothermal method, Two-step reaction of aging through simple room temperature and solvent heat treatment, sea urchin-like ZnO hollow microspheres were prepared in the substrate zinc tablets. The shell of the hollow microspheres prepared as two parts, the Inner shell was composed by nanoparticles, and the shell layer was composed by nanorod arrays. The morphologies and the structures were characterized by SEM and XRD. It has been found that room temperature aging process is a key factor of control ZnO nanorods grown on the surface to form a sea urchin-like nanorod array. The article also study the different structure of the ZnO nanorod arrays photolμminescence spectra of and Raman spectroscopy and discuss the possible formation mechanism of hollow microspheres3. The pompon ZnO microspheres were prepared by rection of Zn(CH3COO)2·2H2O, Doped with silver under hydrothermal conditions. The morphologies and the structures were characterized by SEM. It has been found that the pompon ZnO microspheres have better dispersion, the diameter of about5-10μm, And detailed examination of a variety of experimental conditions on the morphology of the product and the product of reaction mechanism.4. Ellipsodial TiO2microspheres were prepared by rection of K2TiO(C2O4)2, doped with silver under hydrothermal conditions at170℃for24h. The morphologies and the structures were characterized by SEM. It has been found that doped silver ellipsoidal TiO2nanospheres uniform size, have better dispersion, the length and width of approximately120nm and60nm, And detailed examination of a variety of experimental conditions on the morphology of the product and the product of reaction mechanism.