Department of Chemical and Materials Engineering, National Central University, Jhong-Li 32001, Taiwan.
J Nanosci Nanotechnol. 2019 Nov 1;19(11):7356-7362. doi: 10.1166/jnn.2019.16615.
A series of multifunctional silver-doped titanium dioxide (Ag/TiO₂) nanocomposites with various silver contents were synthesized by the peroxo sol-gel method using TiCl4 as a precursor and H₂O₂ as a peptizing agent. The sol was used to coat a glass substrate, thereby forming a thin film. The antiviral and antibacterial activities of the Ag/TiO₂ films and their use in the photocatalytic degradation of an aqueous solution of methylene blue were investigated. The as-prepared materials were characterized using high-resolution transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The antiviral and antibacterial activities of the samples were tested against , the influenza A virus (H1N1), and enterovirus. It was observed that an optimum Ag:TiO₂ weight ratio of 1:100 enabled the highest activity in the photocatalytic degradation of an aqueous solution of methylene blue under irradiation with either ultraviolet or visible light. Moreover, the same composition remarkably exhibited extremely high antibacterial and virucidal effectivenesses greater than 99.99% against and infectious viruses after illumination with ultraviolet A. The presence of silver on TiO₂ significantly enhanced its photocatalytic activity. Thus, the excellent photocatalytic activities and reusability of the Ag/TiO₂ nanocomposite render it applicable as a coating material for several purposes.
采用过氧溶胶-凝胶法，以 TiCl4 为前驱体，H₂O₂为胶溶剂，合成了一系列具有不同银含量的多功能银掺杂二氧化钛（Ag/TiO₂）纳米复合材料。利用溶胶涂覆玻璃基底，形成薄膜。研究了 Ag/TiO₂薄膜的抗病毒和抗菌活性及其在光催化降解亚甲基蓝水溶液中的应用。采用高分辨率透射电子显微镜、X 射线衍射和 X 射线光电子能谱对所制备的材料进行了表征。采用甲型流感病毒（H1N1）和肠道病毒对样品的抗病毒和抗菌活性进行了测试。结果表明，在紫外光或可见光照射下，Ag:TiO₂ 重量比为 1:100 时，Ag/TiO₂ 光催化降解亚甲基蓝水溶液的活性最高。此外，相同组成的银掺杂 TiO₂ 在紫外 A 光照射下对 和感染性病毒的抗菌和杀病毒效果极高，均大于 99.99%。Ag 的存在显著提高了 TiO₂ 的光催化活性。因此，Ag/TiO₂ 纳米复合材料具有优异的光催化活性和可重复使用性，可作为多种用途的涂层材料。
