氧化锌纳米结构的制备及其光催化性质

In this paper, ZnO nanostructures (nano-disk, nano-flower and nano-rod) were synthesized at 150℃ by adjusting the molar ratio of reactants in hydrothermal method. The morphology of the nanostructures were characterized with scanning electron microscopy (SEM) and X-ray diffraction. PL spectra were measured to study the luminescent properties; and the nanostructures were used to photo-catalyze methylthionine chloride (C16H18CIN3S,MB) under ultraviolet illumination. The results indicate that the ZnO nano-disk has the weakest PL emission but has the best photo-catalyzing effect than the nano-flower and nano-rod. We speculate that this is due to ZnO nano-disk having stronger quantum confinement and larger specific surface area than the other two nanostructures, which is benefit to the surface absorption and charge transfer. The increase of the charge transfer rate can decrease the direct radiative recombination within the ZnO nano-disk, thus enhance the photo-catalyzing effect of nano-ZnO on the dye molecules.