Application Of Sodium Thiosulfate In The Preparation Of ZnO Nano-Materials

ZnO materials have unique electrical, optical, magnetic, mechanical properties, and have a wide range of applications in micro-electronic and optoelectronic devices These unique properties not only depend on the composition, structure and scale, but also its dimensions and shapes, which require their structure, composition, shape, size and position are controlable. Therefore, to achieve shape-control ZnO is an important area of research, and has great significance for industrial production and application. Phase behavior of surfactant in chemical reaction system and its structural diversity have become a research focus. In the specialty surfactants, there are a kind of sulfur group of surfactants, usually containing N, S, O and other functional groups of organic molecules on inorganic oxides have a certain degree of affinity, These functional groups through hydrogen bonding, charge attract or a variety of ways, such as chemical adsorption and the surface of inorganic oxide particles and thus have a modified function. In the compounds, in addition to the formation of organic sulfur coordination ability with sulfide ions, the inorganic compounds of sodium thiosulfate (Na₂S₂O₃), sulfur atom oxidation number of +6, and the other is -2, -2 valence state of sulfur atom in the anion locates one corner of the tetrahedron and has a capacity of coordination. In addition, sulfur anion can interact with ZnO as a sulfur adsorbent, so the Na₂S₂O₃ can be used for the preparation of ZnO nano-materials.In this study, it is reasonable to use of S-contained ligands for controllable growth of ZnO nanostructures: to achieve a certain degree of ZnO nucleation, growth and morphology control, and to prepare a series of new nano-composite structures. At the same time the fluorescence emission properties of S-doped flower-like ZnO was studied. Main contents include the following parts:(1) Studied how Na₂S₂O₃ to control ZnO morphology in the Zn foil-CH₃NO reaction system. The results show that Na₂S₂O₃ not only acts as a surfactant but also sulfur resource for S-doped; Na₂S₂O₃ adsorbs on ZnO through the metal-sulfur coordination, affects the growth habits of ZnO. Therefore, a variety morphologys of ZnO were obtained.(2) Studied the effect of Na₂S₂O₃ to nanocrystalline ZnO regulation of morphology at room temperature and studying the S-doped ZnO photoluminescence properties. At room temperature we got sulfur-doped flower-like ZnO. Through its photoluminescence study, we found that sulfur-doped ZnO only have visible light emission, ultraviolet emission disappeared which has an important value for ZnO application in the visible region.(3) Studied the impact of oleic acid for C₆H₁₂N₄-Zn(NO₃)₂-Na₂S₂O₃ reaction system. In conclusion, hollow microspheres of sulfur have been synthesized via a simple solution route at room temperature and ambient conditions for the first time. Oleic acid acts as both template and reagent. For the low solubility of oleic acid, process of the formation of sulfur hollow microspheres lasts as long as two weeks but benifits simple raction conditions.