Novel Core-Sheath Cu/Cu2O-ZnO-Fe3O4 Nanocomposites with High-Efficiency Chlorine-Resistant Bacteria Sterilization and Trichloroacetic Acid Degradation Performance
Novel Core-Sheath Cu/Cu2O-ZnO-Fe3O4 Nanocomposites with High-Efficiency Chlorine-Resistant Bacteria Sterilization and Trichloroacetic Acid Degradation Performance
复制标题
具有高效耐氯细菌灭菌和三氯乙酸降解性能的新型核鞘Cu/Cu2O-ZnO-Fe3O4纳米复合材料
DOI：
10.1021/acsami.0c21336
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发表时间：
2021
影响因子：
9.5
通讯作者：
Wu Qingsheng
中科院分区：
文献类型：
--
作者：
Zhou Wei;Fu Lin;Zhao Long;Xu Xiaojuan;Li Weiying;Wen Ming;Wu Qingsheng
为了解决含氯处理后自来水中的耐氯细菌（CRB）和消毒副产物（DBP）两个问题，设计并合成了一种创新的核鞘纳米结构Cu/Cu2O-ZnO-Fe3O4。然后系统地分析了材料的制造机理，以确定其成分和价态。详细研究了 Cu/Cu2O-ZnO-Fe3O4 的 CRB 灭活和三氯乙酸 (TCAA) 光降解性能。研究发现，由于纳米线结构、离子释放和活性氧生成的协同作用，Cu/Cu2O-ZnO-Fe3O4 显示出优异的抗菌活性，且细胞毒性浓度相对较低。此外，Cu/Cu2O-ZnO-Fe3O4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，通过动力学分析证实其主要由表面反应主导。更有趣的是，孵育10小时后，Cu/Cu2O-ZnO-Fe3O4的细胞生长率分别比Cu/Cu2O和Cu/Cu2O-ZnO高50%和10%，表现出较弱的细胞毒性。因此，设计的Cu/Cu2O-ZnO-Fe3O4可能是一种有前途的自来水处理剂。
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/Cu2O-ZnO-Fe3O4was 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/Cu2O-ZnO-Fe3O4were investigated in detail. It was found that Cu/Cu2O-ZnO-Fe3O4displayed 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/Cu2O-ZnO-Fe3O4nanocomposite 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/Cu2O-ZnO-Fe3O4was determined to be 50% and 10% higher than those of Cu/Cu2O and Cu/Cu2O-ZnO after 10 h incubation, respectively, manifesting a weaker cytotoxicity. Therefore, the designed Cu/Cu2O-ZnO-Fe3O4could be a promising agent for tap water treatment.