Preparation And Properties Of The Different Morphology Nano-ZnO Array

Currently nanotechnology has developed in depth to become an independent frontier in physics, chemistry, materials chemistry, medicine, biology and other disciplines. ZnO is one kind semiconductor functional material of low-cost and great potential and value. Nano-ZnO has a band gap of3.37eV binding energy, excellent chemical thermal stability up to60MeV machine, as well as various exciton emission and composite occurred in the ultraviolet region. It has attracted wide attention in the field of piezoelectric device materials, solar cells, gas sensors and catalytic applications. At the same time, ZnO has a high chemical thermal stability, better resistance to radiation damage ability, lower growth temperature and better fitness for the long-life devices and other advantages compared with the wide band gap materials such as ZnSe,GaN, SiC.In this paper, nano-rod、pencil-like and tower-like nano-ZnO array were prepared by hydrothermal method of lower temperature and the influence of the type of active agent on the growth process of ZnO were also studied. We have obtained the nano-rods ZnO array when DAP (1,3-propanediamine) participates in the reaction and pencil-shaped when hydrazine hydrate added. Preparing the nano-semiconductor materials of complex morphology using a secondary water bath growth. Taking ZnO nano-wires and nano-rods as the research objects, by adopting methods of dipping, spin coating, annealing, the growth of the secondary water bath, we have prepared the thread-like and villous-like ZnO nano-wires, ZnO nano-clusters and rods of ZnO corn. CuO/ZnO composite nano-tree arrays with ideal morphology were synthesized by using thermal oxidation and hydrothermal methods. Second growth on the CuO nanowires contributes to a well-functioned ZnO nano-rods with anisotropy. Microstructure, crystal structure and optical properties of the samples were characterized by means of scanning electron microscopy, X-ray diffraction and photoluminescence spectroscopy. The results show that the samples are well-crystallized, PL spectra show that all samples have a strong UV emission peak at384nm. The photocatalytic performance of tower-like nano-ZnO is more superior in the one-dimensional nanomaterials, compared with one-dimensional nanomaterials, the photocatalytic performance of nanosemiconductor materials with complex morphology has been greatly improved, meanwhile relevant emission peaks appear in IR spectrogram, for complex nano-ZnO and composite CuO/ZnO nano-tree semiconductor materials have larger surface area, at the same time, ZnO branches have a more catalytic activity center, for such advantages, the degradation rate of the CuO/ZnO nano-tree reaches94%after reacting for100mins.