State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai, 200092, China; Key Laboratory of Yangtze River Water Environment, Ministry of Education, Shanghai, China.
State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai, 200092, China.
Chemosphere. 2020 Oct;256:127099. doi: 10.1016/j.chemosphere.2020.127099. Epub 2020 May 16.
Membrane fouling is an issue of concern due to the hydrophobic properties of polyethersulfone (PES) membrane when applied in water treatment. In this work, a facile hydrothermal method was utilized to synthesize hierarchical flower-like structured molybdenum disulfide nanosheets (HF-MoS2 NSs) that then incorporated into PES membranes as composite membranes. We characterized their permeability, the separation performance, the antifouling performance, and the antibacterial activity systematically. Results showed that composite membranes exhibited a better pure water flux (286 LMH/bar) at the HF-MoS NSs content of 0.4 wt%, which was 1.8 times higher than the control membrane. Also, composite PES membranes achieved 98.2% and 96.9% rejection of BSA and HA in comparison with the control PES membrane (87.3%, and 84.5%, respectively). Compare to the control PES membrane, the flux recovery ratio of the composite membrane increased from 69% to 88% for BSA fouling and increased from 84% to 93% for HA fouling. The retention rate for the organic dyes also improved slightly after HF-MoS2 NSs incorporation into the membrane. Additionally, the composite membranes exhibited a relatively high antibacterial activity against E. coli and B. subtilis with antibacterial rates of 67.8% and 82.5%, respectively. In conclusion, HF-MoS2 NSs incorporated composite membranes were shown to have outstanding filtration performance and could be a promising candidate for practical application in water filtration.
由于聚醚砜（PES）膜在水处理应用中的疏水性，膜污染是一个令人关注的问题。在这项工作中，采用了一种简便的水热法来合成具有分级花状结构的二硫化钼纳米片（HF-MoS2 NSs），然后将其作为复合膜添加到 PES 膜中。我们系统地对其渗透性、分离性能、抗污染性能和抗菌活性进行了表征。结果表明，在 HF-MoS2 NSs 含量为 0.4wt%时，复合膜表现出更好的纯水通量（286 LMH/bar），是对照膜的 1.8 倍。此外，与对照 PES 膜相比，复合 PES 膜对 BSA 和 HA 的截留率分别达到 98.2%和 96.9%，而对照 PES 膜分别为 87.3%和 84.5%。与对照 PES 膜相比，BSA 污染时复合膜的通量恢复率从 69%增加到 88%，HA 污染时从 84%增加到 93%。在将 HF-MoS2 NSs 掺入膜中后，对有机染料的保留率也略有提高。此外，复合膜对大肠杆菌和枯草芽孢杆菌表现出较高的抗菌活性，抗菌率分别为 67.8%和 82.5%。总之，HF-MoS2 NSs 复合膜具有优异的过滤性能，有望成为实际水过滤应用的有前途的候选材料。
