Abstract
Fe and Co and Cr doped nanometer ZnO powder was prepared respectively by coprecipitating method with ZnNO3•6H2O, HCl, NaOH, FeCl3•6H2O, CoCl2•6H2O, CrCl3•6H2O as raw materials. Influence of Fe and Co and Cr doped amount on the photoactivating property of nanometer ZnO photocatalyst powder was studied respectively by methyl orange solution as a reaction model. The particle size and dispersion of Fe-doped ZnO powder was characterized by transmission electron microscope(TEM). The results show that the photoactivating activity of nanometer ZnO powder starts increasing and then decreasing when Fe or Co or Cr doped amount decreases.The photoactivating activity of nanometer ZnO powder is maximum when Fe or Co or Cr doped amount is 0.2 wt.%, the degradation rate of methyl orange is 60.79%, 52.56%, 53.91% after ultraviolet light for 50 minutes, respectively. When Fe doped amount is 0.2wt.%, the degradation rate of methyl orange is the highest, the degradation rate of methyl orange is 60.79%, particle size is 20-30 nanometer and dispersion is good.
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