Efficient Antibacterial Membrane based on Two-Dimensional Ti(3)C(2)T(x) (MXene) Nanosheets.
Efficient Antibacterial Membrane based on Two-Dimensional Ti(3)C(2)T(x) (MXene) Nanosheets.
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DOI：
10.1038/s41598-017-01714-3
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发表时间：
2017-05-09
影响因子：
4.6
通讯作者：
Gogotsi Y
中科院分区：
文献类型：
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作者：
Rasool K;Mahmoud KA;Johnson DJ;Helal M;Berdiyorov GR;Gogotsi Y
先进的膜，使超快的水通量，同时表现出抗生物污染的特点，可以促进可持续的水/废水处理工艺。MXene，二维（2D）金属碳化物和氮化物，在水/废水处理中的应用引起了人们的注意。在这项工作中，我们报道了微米厚的碳化钛（Ti 3C 2 Tx）MXene膜的抗菌性能，通过过滤制备的聚偏氟乙烯（PVDF）支持。测试了Ti 3C 2 Tx改性膜对大肠杆菌（Escherichia coli）的杀菌性能。coli）和枯草芽孢杆菌（B.枯草杆菌）通过在膜表面上的细菌生长和其暴露于细菌悬浮液。新鲜Ti 3C 2 Tx MXene膜对B的抗菌率达到73%以上。枯草芽孢杆菌（E. subtilis）和大肠杆菌（E.而老化的Ti 3C 2 Tx膜在相同条件下对两种细菌的生长抑制率均超过99%。流式细胞术显示，在两种细菌菌株暴露24小时后，约70%的死亡和受损细胞群体。细胞表面的损伤也分别通过扫描电子显微镜（SEM）和原子力显微镜（AFM）分析揭示。MXene涂层膜对常见水生细菌的抗菌活性，促进了其作为抗生物污染膜在水和废水处理过程中的潜在应用。
Advanced membranes that enable ultrafast water flux while demonstrating anti-biofouling characteristics can facilitate sustainable water/wastewater treatment processes. MXenes, two-dimensional (2D) metal carbides and nitrides, have attracted attention for applications in water/wastewater treatment. In this work, we reported the antibacterial properties of micrometer-thick titanium carbide (Ti3C2Tx) MXene membranes prepared by filtration on a polyvinylidene fluoride (PVDF) support. The bactericidal properties of Ti3C2Tx modified membranes were tested against Escherichia coli (E. coli) and Bacillus subtilis (B. subtilis) by bacterial growth on the membrane surface and its exposure to bacterial suspensions. The antibacterial rate of fresh Ti3C2Tx MXene membranes reaches more than 73% against B. subtilis and 67% against E. coli as compared with that of control PVDF, while aged Ti3C2Tx membrane showed over 99% growth inhibition of both bacteria under same conditions. Flow cytometry showed about 70% population of dead and compromised cells after 24 h of exposure of both bacterial strains. The damage of the cell surfaces was also revealed by scanning electron microscopy (SEM) and atomic force microscopy (AFM) analysis, respectively. The demonstrated antibacterial activity of MXene coated membranes against common waterborne bacteria, promotes their potential application as anti-biofouling membrane in water and wastewater treatment processes.