Abstract
In this paper,nano-ZnO and Eu3+ doped nano-ZnO powders were prepared by ultrasonic atomization and co-precipitation method with Zn(NO3)2 and(NH4)2CO3 as reactants.The effects of the ultrasonic spraying condition,the reaction time and chemical composition on the morphology and size of ZnO nanopowder were carefully investigated.And the chemical processing condition of the zinc hydroxide dehydrated to ZnO nano-powder was analyzed.XRD,SEM and fluorescence spectrophotometer were employed to characterize the phase composition,particle size and luminescence property of the nano-powder.XRD results of the powder show a typical wurtzite hexagonal crystal structure.The photoluminescence spectra indicate that Eu3+ ions are successfully doped into the crystal lattice of ZnO matrix.The emission of the 5D0→7F2 comes from an allowed electric-dipole transition is the strongest.The SEM results show that the prepared spherical nanosized zinc oxide have narrow size distributions at 35~45 nm.The effect of ZnO content on the emission intensity was also investigated.The concentration quenching for the emission intensity did not occur when the doping concentration of Eu3+ up to 10%.
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