Cu-doped K₂Ti₆O₁₃ (Cu–KTO) nanowires were prepared using a combination of sol–gel and hydrothermal methods to improve the photocatalytic and antibacterial performance of K₂Ti₆O₁₃ (KTO) nanowires. The Cu–KTO nanowires maintained the monoclinic structure of KTO. The Cu²⁺ ions could enter into the lattice of KTO by substituting for certain Ti⁴⁺ ions and cause the formation of defects and oxygen vacancies. The UV–Visible absorption spectra showed that after Cu doping, the absorption edge of KTO moved to the visible region, indicating that the band gap decreased and the ability to absorb visible light was acquired. The photocatalytic properties of the Cu–KTO nanowires with different doping amounts were assessed by simulating the photodegradation of rhodamine B (RhB) under simulated sunlight irradiation. The 1.0 mol% Cu–KTO nanowires showed the best photocatalytic performance, and 91% of RhB was decomposed by these nanowires (the catalyst dose was only 0.3 g/L) within 5 h. The performance of the Cu–KTO nanowires was much better than that of the KTO nanowires. The Cu–KTO nanowires also showed high antibacterial activity for Escherichia coli (ATCC 25922) of up to 99.9%, which was higher than that of the pure KTO samples. Results proved that Cu doping is an effective means to develop multifunctional KTO nanomaterials. It can be used to degrade organic pollutants and remove harmful bacteria simultaneously in water environments.

中文翻译：

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铜掺杂诱导增强的K2Ti6O13纳米线的光催化和抗菌活性

铜掺杂的K ₂ Ti ₆ O ₁₃（Cu-KTO）纳米线的制备采用溶胶-凝胶法和水热法相结合，以改善K ₂ Ti ₆ O ₁₃（KTO）纳米线的光催化和抗菌性能。Cu–KTO纳米线保持KTO的单斜晶结构。通过取代某些Ti ⁴⁺可以使Cu ²⁺离子进入KTO晶格离子并导致缺陷和氧空位的形成。紫外可见吸收光谱表明，掺杂铜后，KTO的吸收边移至可见光区域，表明带隙减小，并获得了吸收可见光的能力。通过模拟在模拟阳光照射下若丹明B（RhB）的光降解，评估了不同掺杂量的Cu-KTO纳米线的光催化性能。1.0 mol％的Cu–KTO纳米线表现出最佳的光催化性能，并且这些纳米线在5小时内分解了91％的RhB（催化剂剂量仅为0.3 g / L）。Cu–KTO纳米线的性能比KTO纳米线的性能好得多。Cu–KTO纳米线还显示出对大肠杆菌的高抗菌活性（ATCC 25922）高达99.9％，高于纯KTO样品。结果证明，铜掺杂是开发多功能KTO纳米材料的有效手段。它可以用于降解有机污染物并在水环境中同时清除有害细菌。