目的 为克服纳米氧化钛在黑暗条件下不具有抗菌效果这一缺点，使用抗菌金属元素Cu、Zn和Ag掺杂以提高其抗菌性能。方法 利用大气等离子喷涂技术在钛合金表面制备Cu、Zn和Ag掺杂的TiO2复合涂层。利用X射线衍射仪（XRD）、拉曼光谱仪（Raman）和场发射扫描电子显微镜（FE-SEM），对涂层的物相组成和表面形貌进行表征。利用接触角测量仪、三位轮廓仪、电化学工作站和电感耦合等离子体原子发射光谱，对涂层的亲水性、表面粗糙度、耐腐蚀性能和抗菌离子释放情况进行表征。利用细菌和涂层共培养实验来评价涂层的抗菌效果。结果 抗菌金属元素掺杂没有改变TiO2涂层的主要相结构，涂层主要由金红石相组成。涂层具有微米级的表面粗糙度，表面由粒径小于50 nm的粒子组成。掺杂使TiO2涂层的亲水性略有降低。Cu掺杂的涂层的耐腐蚀性能大幅提升，抗菌金属离子在各涂层中都可以释放，且Cu掺杂涂层中的释放量最高。与细菌共培养24 h之后，TiO2涂层没有显示出抗菌效果，掺杂后涂层表现出优异的抗菌性能。在有水存在的条件下进行紫外光预辐照，可以显著提高TiO2涂层的抗菌性能，且掺杂后的涂层在经过预辐照后抗菌性能的提升大于TiO2涂层。结论 抗菌金属元素掺杂不改变涂层结构，同时大幅提高了等离子喷涂TiO2涂层在黑暗条件下的抗菌性能，紫外预辐照处理能够使没有抗菌性能的TiO2涂层具备抗菌效果，也能进一步提升掺杂涂层的抗菌效果。

Nanosized TiO2 has been widely used as antibacterial materials because of its strong oxidation activity ascribed to nanometer size effects. However, TiO2 shows no antibacterial properties in dark condition, so antibacterial elements (Cu, Zn and Ag) are doped to overcome this disadvantage. TiO2 coatings mixed with Cu, Zn and Ag were produced by atmospheric plasma spraying (APS) technique. The phase composition and microstructure of the coatings were characterized by X-ray diffraction (XRD), Raman and field emission scanning electron microscopy (FE-SEM). The contact angle meter, three-position profile meter, electrochemical workstation and inductively coupled plasma atomic emission spectroscopy were adopted to analyze the hydrophilicity, surface roughness, corrosion resistance and antibacterial ion release of the coating. The antibacterial effects of coating were evaluated by the co-culture test of bacteria and coating. Doped antibacterial metal elements did not change the phase structure of the TiO2 coating and the coating was mainly composed of rutile. The coating had the surface roughness of micron order and the surface was composed of nano particles with diameter below 50 nm. The doped elements lowered the hydrophilicity of TiO2 coating. The corrosion resistance of coating mixed with Cu increased dramatically and the antibacterial metal ions could be released in various coatings and the release amount of Cu was the largest. TiO2 coating did not show antibacterial effects after being cultured with bacteria for 24 h, while the coating doped with antibacterial elements showed excellent antibacterial properties. Pre-photo irradiation by UV light could significantly improve the antibacterial function of the nanostructured TiO2 coating in the presence of H2O. The antibacterial metal elements do not change, but improves the antibacterial properties of plasma sprayed TiO2 coating significantly in dark conditions. Pre-photo irradiation by UV light can provide the non-antibacterial TiO2 coating with antibacterial properties, and can also further enhance the antibacterial properties of doped coatings.