目的 制备一种高抗菌性和高光催化活性的 Ag 掺杂 TiO2（Ag-TiO2）纳米棒阵列。 方法 通过磁控溅射与水热复合处理法，在钛箔片表面制备出 Ag 掺杂 TiO2（Ag-TiO2）纳米棒阵列，酸化处理过的试样在 500 ℃下煅烧 2 h。采用 X射线衍射（XRD）进行物相分析，利用场发射扫描电子显微镜（SEM）、场发射透射电子显微镜（TEM）、能量分散谱仪(EDS)观察试样的表面、 截面形貌、微观结构和组成，并探究其对大肠杆菌和金黄色葡萄球菌的杀菌性能和对亚甲基蓝的光催化降解能力。 结果 该工艺下制备的 Ag-TiO2 纳米棒大小均匀，取向明显，主要由锐钛矿型 TiO2 相组成。 Ag-TiO2 纳米棒对大肠杆菌和金黄色葡萄球菌具有优异的杀菌效果，杀菌率几乎达到 100%。 Ag-TiO2纳米棒能有效地提高亚甲基蓝的降解率。 结论 磁控溅射与水热复合处理法在钛箔片表面成功制备出 Ag-TiO2纳米棒阵列，此阵列具有优异的杀菌能力、高抗菌和光催化降解性能。

Objective To prepare Ag-TiO2 nanorod arrays with excellent antibacterial activity and photocatalytic performance. Methods The Ag-TiO2 nanorod arrays were synthesized directly on Ti foils by magnetron sputtering and hydrothermal treatment method. The acid treated sample was calcined at 500 degrees for 2 hours. The phase composition of the synthesized samples was analyzed by X-ray diffraction (XRD), Surface cross sectional morphology microstructure and chemical elements were observed by scanning electron Microscope (SEM), transmission electron microscope (TEM) and Energy Dispersive Spec- troscopy(EDS). The photocatalytic antibacterial performance after contact with S. aureus and E. coli was assessed. And the photocatalytic degradation of methylene blue was measured under visible light. Results The results showed that the anatase TiO2 phase nanorods had uniform size and obvious orientation. The Ag-TiO2 nanorod arrays showed excellent efficient antibacterial activity against S. aureus and E. coli, and almost all of the bacteria were killed. The result of photocatalytic experiment showed that the degradation rate of methylene blue was effectively improved by the Ag-TiO2 nanorod arrays. Conclusion The Ag-TiO2 nanorod arrays were successfully synthesized on Ti foils substrate by the composite technology of magnetron sputtering and hydrothermal treatment method. The Ag-TiO2 nanorod arrays showed excellent antibacterial activity and a better photocatalytic performance.