College of Environmental Science and Engineering, School of Chemical Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Shanghai Key Laboratory of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, PR China.
Department of Pathology and Pathophysiology, School of Medicine, Tongji University, Shanghai 200092, PR China.
ACS Appl Mater Interfaces. 2021 Mar 10;13(9):10878-10890. doi: 10.1021/acsami.0c21336. Epub 2021 Feb 26.
In order to solve two issues of chlorine-resistant bacteria (CRB) and disinfection byproducts (DBPs) in tap water after the chlorine-containing treatment process, an innovative core-sheath nanostructured Cu/CuO-ZnO-FeO was designed and synthesized. The fabrication mechanism of the materials was then systematically analyzed to determine the component and valence state. The properties of CRB inactivation together with trichloroacetic acid (TCAA) photodegradation by Cu/CuO-ZnO-FeO were investigated in detail. It was found that Cu/CuO-ZnO-FeO displayed excellent antibacterial activity with a relatively low cytotoxicity concentration due to its synergism of nanowire structure, ion release, and reactive oxygen species generation. Furthermore, the Cu/CuO-ZnO-FeO nanocomposite also exhibited outstanding photocatalytic degradation activity on TCAA under simulated sunlight irradiation, which was verified to be dominated by the surface reaction through kinetic analysis. More interestingly, the cell growth rate of Cu/CuO-ZnO-FeO was determined to be 50% and 10% higher than those of Cu/CuO and Cu/CuO-ZnO after 10 h incubation, respectively, manifesting a weaker cytotoxicity. Therefore, the designed Cu/CuO-ZnO-FeO could be a promising agent for tap water treatment.
为了解决含氯处理后自来水中耐氯细菌（CRB）和消毒副产物（DBPs）这两个问题，设计并合成了一种创新的核壳纳米结构 Cu/CuO-ZnO-FeO。然后系统地分析了材料的制备机制，以确定其成分和价态。详细研究了 Cu/CuO-ZnO-FeO 对 CRB 灭活和三氯乙酸（TCAA）光降解的性能。结果表明，由于纳米线结构、离子释放和活性氧生成的协同作用，Cu/CuO-ZnO-FeO 具有优异的抗菌活性和相对较低的细胞毒性浓度。此外，Cu/CuO-ZnO-FeO 纳米复合材料在模拟太阳光照射下对 TCAA 也表现出优异的光催化降解活性，通过动力学分析验证其主要受表面反应控制。更有趣的是，与 Cu/CuO 和 Cu/CuO-ZnO 相比，Cu/CuO-ZnO-FeO 在孵育 10 h 后细胞生长率分别提高了 50%和 10%，表现出较弱的细胞毒性。因此，设计的 Cu/CuO-ZnO-FeO 可能是一种有前途的自来水处理剂。
