Centre/Department of Physics, Portugal; Centre/Department of Chemistry, Portugal; IB-S - Institute for Research and Innovation on Bio-Sustainability, University of Minho, 4710-057, Braga, Portugal.
Centre/Department of Physics, Portugal; Centre/Department of Chemistry, Portugal; IB-S - Institute for Research and Innovation on Bio-Sustainability, University of Minho, 4710-057, Braga, Portugal.
Chemosphere. 2020 Jul;250:126299. doi: 10.1016/j.chemosphere.2020.126299. Epub 2020 Feb 21.
Emerging pollutants represent a new global problem for water quality. As these compounds get into the environment, they cause severe threats to aquatic environments and human health and are typically resistant to conventional wastewater treatments. In this work, TiO nanoparticles surface was functionalized with silver (Ag) nanoparticles, and solvent cast and electrospun membranes of poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) were prepared with different concentrations of TiO and Ag-TiO to produce a multifunctional material. The photocatalytic activity of the nanocomposites was evaluated through the degradation of norfloxacin under ultraviolet (UV) and visible radiation. It is shown that nanocomposites with Ag-TiO show the highest degradation efficiencies: 64.2% under UV and 80.7% under visible radiation, for 90 and 300 min, respectively. Furthermore, the recyclability of the membranes has also been demonstrated. Finally, it is shown the antimicrobial activity of the nanocomposite membranes, demonstrating the suitability of the Ag-TiO/PVDF-HFP nanocomposites as multifunctional photocatalytic and antimicrobial membranes for water remediation applications.
新兴污染物是水质的一个新的全球性问题。这些化合物进入环境后，会对水生环境和人类健康造成严重威胁，而且通常对传统的废水处理具有抗性。在这项工作中，TiO2 纳米粒子表面功能化了银（Ag）纳米粒子，并用不同浓度的 TiO2 和 Ag-TiO2 制备了聚偏二氟乙烯-共-六氟丙烯（PVDF-HFP）的溶剂浇铸和静电纺丝膜，以生产多功能材料。通过在紫外（UV）和可见光辐射下降解诺氟沙星来评估纳米复合材料的光催化活性。结果表明，Ag-TiO2 纳米复合材料具有最高的降解效率：在 90 和 300 分钟时，分别在 UV 和可见光辐射下达到 64.2%和 80.7%。此外，还证明了膜的可回收性。最后，展示了纳米复合材料膜的抗菌活性，表明 Ag-TiO2/PVDF-HFP 纳米复合材料适合作为用于水修复应用的多功能光催化和抗菌膜。
