Study On Preparation And Performance Of Metal Ions Doped Nano Zinc Oxide

In this article,Ni_xZn_1-xO?x=0,0.04,0.08 and 0.12?,Fe_xZn_1-xO?x=0,0.04,0.08 and 0.12?and Co_xZn_1-xO?x=0,0.04,0.08 and 0.12?were prepared by reflux method,respectively.The crystal structure of the materials was characterized by XRD,SEM,FT-IR and UI-vis.The photocatalytic activity of the materials was studied using methyl orange as target compounds,UV lamp as light source.The results showed that:Nano-ZnO was prepared with Zinc acetate dihydrate as the precursor,glycol as the solvent,trisodium citrate as the dispersant.The obtained nano-ZnO was hexagonal wurtzite structure.Nano-ZnO doped Ni²⁺ ions was hexagonal wurtzite stucture.The particle was spherical and the average particle size was between 10 to 20 nm and particle distribution was uniform.There was mild group together.Average particle size decreased with the increase of Ni²⁺ ions.UI-vis showed that with the increment of Ni²⁺ ions,the absorption peak position moved to small wavelength direction.There was a slight red shift phenomenon.Doping Ni²⁺ ions could improve the photocatalytic activity and antibacterial activity of nano-ZnO.Different photocatalytic activity and antibacterial activity would be obtained with different content Ni²⁺ ions.In the 2-20 GHz frequency range,when the Ni²⁺ ions content was x= 0.04,the dielectric properties and wave absorption performance were the best.Nano-ZnO doped Co²⁺ ions was hexagonal wurtzite stucture.Co²⁺ ions existed in the surface of ZnO as element form.The rod structure of nano-ZnO was not destroyed.The average size of ZnO was 150 nm.The photocatalytic performance of ZnO was significantly changed because of doping Co²⁺ ions.When the Co²⁺ ions content was x= 0.08,it showed the highest photocatalytic performance.With the increasing of Co²⁺ ions content doping,the antibacterial properties of nano-ZnO was improved.When the Co²⁺ ions content was x= 0.12,antibacterial properties was the best.When Co²⁺ ions content was x= 0.04,nano-ZnO showed the best dielectric properties and wave absorption performance.The crystal shape didn't change after doping Fe²⁺ ions.The effect of doping was good and had good appearance,uniform particles.Fe²⁺ ions could spread envenly into the ZnO particles and weaken the tiny nano-ZnO reunion.FI-IR showed that samples showed charateristic absorption peak of ZnO and no Fe-O characteristic absorption peak.When the Fe²⁺ ions content was x= 0.08,there was the highest degradation rate which was higher 4.59% than pure ZnO.With the increasing of Fe²⁺ ions content doping,the dielectric constant real epsilon ?' first increased and then decreased.And it reached the maximum when Fe²⁺ ions content was x= 0.08.Fe²⁺ ions had less effect on ?'' and reflection loss.