TiO-SiO nanocomposites with different copper (Cu) precursor loadings were prepared by a one-step sonochemical process. The mole ratio of Cu precursor in TiO-SiO composite was varied at 0.004, 0.008, 0.020, and 0.040, respectively. The specific X-ray characterization techniques on crystalline structure, chemical composition, and chemical states of Cu-doped TiO-SiO composite were carried out by X-ray diffraction technique (XRD), X-ray fluorescence (XRF), and X-ray photoelectron spectroscopy (XPS), respectively. Surface morphology and chemical bonding of Cu-doped TiO-SiO composite were monitored by field emission scanning electron microscope (FE-SEM) and Fourier transform infrared spectrophotometer (FTIR). For antibacterial properties, the inhibition zone of antimicrobial activity was investigated by varying amounts of Cu precursors in the TiO-SiO composite. After that, Cu-doped TiO-SiO composite powder with different Cu precursor ratios was mixed in PMMA solution and deposited on glass slides to study the optical property and hydrophilicity by UV-VIS-NIR spectrophotometer and contact angle method. XRD patterns of Cu-doped TiO-SiO nanocomposites show the formation of the main TiO anatase phase with the ultrafine particles observed by FE-SEM images. FT-IR spectra of the composites are assigned to the prominent peaks of the Ti-O-Ti and Ti-O-Si bond relating to the TiO-SiO host matrix. Meanwhile, TiO-SiO composites with Cu precursor at 0.004 mol ratio can significantly enhance the antibacterial activity with a large inhibition zone. The contact angle value of Cu-doped TiO-SiO nanocomposite film at 0.040 Cu precursor mole ratio in the TiO-SiO matrix resulted in the optimized composite ratio for achieving a hydrophilic surface on the substrate.

中文翻译：

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声化学法制备Cu掺杂TiO2-SiO2纳米复合材料的X射线表征、结构分析、抗菌活性及自洁性能


通过一步声化学法制备了具有不同铜（Cu）前驱体负载量的 TiO-SiO 纳米复合材料。 TiO-SiO复合材料中Cu前驱体的摩尔比分别变化为0.004、0.008、0.020和0.040。采用X射线衍射技术(XRD)、X射线荧光技术(XRF)和X射线衍射技术对Cu掺杂TiO-SiO复合材料的晶体结构、化学组成和化学状态进行了具体的X射线表征技术分别采用光电子能谱（XPS）。通过场发射扫描电子显微镜（FE-SEM）和傅里叶变换红外分光光度计（FTIR）监测Cu掺杂TiO-SiO复合材料的表面形貌和化学键合。对于抗菌性能，通过改变 TiO-SiO 复合材料中 Cu 前体的含量来研究抗菌活性的抑制区域。之后，将不同Cu前驱体比例的Cu掺杂TiO-SiO复合粉末在PMMA溶液中混合并沉积在载玻片上，通过紫外-可见-近红外分光光度计和接触角法研究其光学性质和亲水性。 Cu 掺杂 TiO-SiO 纳米复合材料的 XRD 图显示了 FE-SEM 图像观察到的主要 TiO2 锐钛矿相和超细颗粒的形成。复合材料的 FT-IR 光谱归属于与 TiO2-SiO2 主体基质相关的 Ti-O-Ti 和 Ti-O-Si 键的突出峰。同时，TiO-SiO复合材料与Cu前驱体的摩尔比为0.004，可以显着增强抗菌活性，并具有较大的抑菌圈。 TiO-SiO 基体中 Cu 前驱体摩尔比为 0.040 的 Cu 掺杂 TiO-SiO 纳米复合薄膜的接触角值导致了在基材上实现亲水表面的最佳复合比例。