TiO2 is a widely used photocatalytic antibacterial material and shows good antibacterial properties under ultraviolet light. However, its antibacterial efficacy under visible light still remains limited. To develop low‐cost and biocompatible antibacterial materials, this article provides a facile method for in situ preparation of a trace amount of silver (Ag) doped TiO2 nanorods (TiO2NR–Ag) composites, which cannot only enhance the antibacterial properties under visible light, but also has good biocompatibility. Two representative epidemic strains, Staphylococcus aureus and Escherichia coli, are selected for analysis of the antibacterial properties of the obtained TiO2NR–Ag composite nanoparticles. The results demonstrate that even if the Ag doping level is as low as 2.5 × 10−4 wt% (i.e., Ag/TiO2 = 2.50 µg g−1), the TiO2NR–Ag composite nanoparticle coatings are transparent and exhibit exceptional antibacterial properties, which is attributed to synergistic enhanced bactericidal effect of the active substances generated by TiO2NR–Ag under visible light. The cytotoxicity and hemolysis rate results indicate that TiO2NR–Ag composite exhibit excellent biocompatibility. This study effectively improves the antibacterial effect of TiO2 photocatalytic nanomaterials while maintaining their biocompatibility, and the prepared TiO2NR–Ag composite nanoparticles can be applied in various fields such as window glasses, medical device surfaces, furniture surfaces, and optical devices, etc.

中文翻译：

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银纳米粒子掺杂TiO2纳米棒复合材料的制备及其可见光照射下的杀菌性能

二氧化钛2是一种广泛应用的光催化抗菌材料，在紫外光照射下表现出良好的抗菌性能。然而，其在可见光下的抗菌功效仍然有限。为了开发低成本和生物相容性抗菌材料，本文提供了一种原位制备微量银（Ag）掺杂二氧化钛的简便方法2纳米棒（TiO2NR-Ag)复合材料不仅能增强可见光下的抗菌性能，而且具有良好的生物相容性。两种具有代表性的流行毒株，金黄色葡萄球菌和大肠杆菌, 选择用于分析所得 TiO2 的抗菌性能2NR-Ag复合纳米颗粒。结果表明，即使 Ag 掺杂水平低至 2.5 × 10−4wt%（即Ag/TiO2= 2.50 微克−1），二氧化钛2NR-Ag复合纳米粒子涂层透明且表现出优异的抗菌性能，这归因于TiO产生的活性物质的协同增强杀菌作用2可见光下的 NR-Ag。细胞毒性和溶血率结果表明TiO2NR-Ag复合材料表现出优异的生物相容性。该研究有效提高了TiO的抗菌效果2光催化纳米材料同时保持其生物相容性，以及制备的TiO2NR-Ag复合纳米粒子可应用于窗玻璃、医疗器械表面、家具表面、光学器件等各个领域。