Production Of Needled Nano-ZnO And Research Of Its Application

The nano-particle size (50⁸0nm) ZnO were synthesized using hot galvanizing dross as raw materials by vacuum-controlled oxygen method.The products were characterized by scanning electron microscopy (SEM), UV-Vis, fluorescence spectroscopy.And the SEM images showed the product was Nanoneedles,the UV-visible absorption spectra showed that the synthesized nano-ZnO on the 275³25nm wavelength range have strong absorption properties of UV.When nano- ZnOs used as photocatalysts to methyl orange photocatalytic degradation,three factors were investigated on the degradation rate of methyl orange including the amount of the catalysts,the initial concentration of methyl orange and different types of catalysts.The results indicated that:the ZnO nano-photocatalytic degradation of methyl orange degradation rate is inversely proportional to the initial concentration of methyl orange;the best dosage of catalyst is 3g/Lwith the degradation rate reaching 85% after 90 min.And it is also shown that the smaller the particle diameter of ZnO is,the higher the photocatalytic activity of nano- ZnO is,and the better effect is.Compared with nano-TiO₂,the effect of the photocatalytic degradation of nano-ZnO is better.So the as-synthesized nano-ZnO can be hoped as an efficient,long life light catalyst material.The method of modifying nano-ZnO was researched, the influence of modified nano-ZnO and the contents of nano-ZnO on mechanical properties of the different epoxy composite were investigated, respectively, and the morphology of the fracture surface of nano-ZnO/epoxy was characterized by SEM. The results show that the matrix effects of the interface between the epoxy and the nano-ZnO was enhanced by coupling agent modified by nano-particle, improved the compatibility each other. The tensile strength, the impact strength and the flexural strength increase with increase in nano-ZnO. The toughening effect of nano-ZnO particles on the epoxy resin is remarkably better than that of the ordinary ZnO particles. When the content of nano-ZnO was 4% , the tensile strength, impact strength and flexural strength of the epoxy resin reaches the maximum, respectively.