Nano Zinc Oxide Whiskers And Its Influencing Factors

Various morphologies zinc oxide products were obtained from zinc and galvanizing plant wastes in conditions of different oxygen content adjusted by vacuum degree. At the same time, factors influencing the structure of zinc oxide, such as temperature, pressure, oxidant and raw materials, were studied.The achievements are as follows:(1) Nanosize zinc oxide were produced from galvanizing plant wastes. The reaction condition which influence the structure of ZnO including temperature, pressure, impurity and assistant material, were discussed in this paper. The products were examed by SEM and XRD , the results showed that temperature and pressure are the main influencing factors. In addition, the impurity also affects the behavior of zinc evaporation, but the influence of assistant material is neglectable. This is an new approach for the recovery of zinc from galvanizing plant wastes.(2) Tetrapod-like ZnO whiskers was obtained from zinc metal, and the oxygen content was adjusted by vacuum degree. The fine Tetrapod-like ZnO whiskers were obtained at 800°C, and beautiful whiskers with smaller root diameter and longer feet were gained at 900°C. The study of its formation conditions showed that proper ratio from zinc to oxygen and temperature are the key conditions. Besides that, effects of raw material's appearance as well as oxidant and the reaction time of Tetrapod-like ZnO whiskers' formation were discussed. The experiment results showed that the perfect tetrapod-like ZnO whiskers can be obtained without catalyzer and at lower temperature than that in the literature. Our work offers an approach with low-consumption, no pollution, and broad applicability of the raw material. Our work can be used for reference in the preparation of other whiskers.