采用微弧氧化技术在TC4 钛合金表面制备TiO2 膜,通过改变正向电压,获得了不同相结构的膜层。通过XRD 表征TiO2 膜层的相结构,SEM ?旆治霰砻嫘蚊?分光光度计测试膜层对亚甲基蓝的降解能力,分析了相结构对光催化性能的影响。结果表明:TiO2 膜层中锐钛矿相含量与正向电压的大小有关,当TiO2 膜层中锐钛矿相的质量分数为83. 98%时,光催化1 h 对亚甲基蓝的降解率可达31. 26%。

Titanium oxide films were prepared by micro-arc oxidation (MAO) on TC4 titanium alloy. The films with different phase structure were obtained by changing the forward voltage. The phase structure,surface topography and photocatalytic ability of titanium oxide films were characterized by X-ray diffraction, SEM and photocatalytic decoloration of methylene blue solution evaluated by visible-infrared spectrometer. The impact of phase structure on photocatalytic performance of titanium oxide films was analyzed. It is found that the relationship between mass fraction content of anatase and anodic voltage. When the mass fraction of anatase is 83. 98% , and the photocatalytic degradation of methylene blue solution arrives 31. 26% in an hour.