Abstract TiO2 nanopowders and Cu-doped TiO2 were prepared by high-energy ball milling and characterized by X-ray diffraction (XRD), UV–vis diffuse reflectance (UV–vis - DRS) spectra, a scanning electron microscope (SEM), an energy dispersive spectrum (EDS) and an X-ray photoelectron spectrometer (XPS) to study the effect of Cu doping amount, milling time and balls-to-powder ratio on the microstructure and antimicrobial activity of the nanopowders. The results show that the mean size of the powders is reduced to below 100 nm after 3 h of milling. The prepared copper-doped TiO2 powders have excellent antibacterial activity against the Gram bacteria, which depends on the degree of copper doping.

中文翻译：

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高能球磨法制备掺铜TiO2的光催化抗菌性能

摘要 采用高能球磨法制备了 TiO2 纳米粉体和 Cu 掺杂的 TiO2，并通过 X 射线衍射 (XRD)、紫外-可见漫反射 (UV-vis - DRS) 光谱、扫描电子显微镜 (SEM)、使用能量色散谱 (EDS) 和 X 射线光电子能谱仪 (XPS) 研究 Cu 掺杂量、研磨时间和球粉比对纳米粉末微观结构和抗菌活性的影响。结果表明，研磨 3 小时后粉末的平均尺寸减小到 100 nm 以下。制备的掺铜TiO2粉体对革兰氏菌具有优异的抗菌活性，抗菌活性取决于铜掺杂的程度。