为提高钛表面原位生长TiO2薄膜层的光催化活性,在恒定电流下,研究了微弧氧化时间对所得膜层光催化活性的影响。利用XRD、SEM和分光光度计研究了氧化膜的相组成、微观结构和光降解效率。结果表明:随氧化时间的延长,涂层表面微孔孔径增加,粗糙度和膜厚变大,微孔数量减少;微弧氧化膜主要由金红石型TiO2和锐钛矿型TiO2组成,随氧化时间的延长,金红石相所占比例逐渐增大;膜层具有较高的光催化活性,该能力主要取决于膜内锐钛矿型TiO2的含量,且随着光照时间的延长而提高,并最终趋于稳定。 In order to improve the photocatalytic activity of TiO2 film grown in-situ on titanium surface, the photocatalytic activity of the resulting film was investigated at constant current. The phase composition, microstructure and photodegradation efficiency of the oxide film were studied by XRD, SEM and spectrophotometer. The results show that with the extension of the oxidation time, the pore diameter of the coating surface increases, the roughness and the film thickness become larger, and the number of the micropores decreases. The micro-arc oxidation film mainly consists of rutile TiO2 and anatase TiO2, , The proportion of rutile phase increases gradually; the film has high photocatalytic activity, which mainly depends on the content of anatase TiO2 in the film, and increases with the increase of illumination time, and eventually increases Stable.