Abstract：ZnO nanoarrays were fabricated through solution method using nano ZnO as seeds, which were hydrolyzed in-situ by anhydrous zinc acetate. The effects of various factors on the morphologies of ZnO nanoarrays during the reaction process, and the photocatalytic activity of the obtained ZnO nanoarrays was investigated. The results indicate that ZnO nanoarrays, which are obtained from ZnO seeds fabricated by dip-coating, distribute uniformly and densely;ZnO nanoarrays, which are obtained from ZnO seeds fabricated by spray coating, appears with larger blank area;the addition of diethanolamine or formamide into the seeds precursor solution, will result in the aggregation of nano ZnO nucleation, which is not conducive to gain the uniform distribution of ZnO nanoarrays. When the solution pH is 6.7, the uniform and dense ZnO nanoarrays with good vertical orientation can be obtained. When using ZnO nanoarrays based on stainless steel wire mesh for the photocatalytic degradation of methyl orange of about 15mg/L, methyl orange is completely eliminated after 3h. Moreover, the ZnO nanoarrays exhibit good photocatalytic activity after three times continuous photocatalytic degradation in succession.
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