In this work, the rejection performance of methyl orange (MO) through molybdenum disulfide membranes in water combining electroosmosis has been studied in order to develop the 2D nanofiltration materials for waste water treatment. The laminar and homogeneous membranes could be prepared through mechanical exfoliation and vacuum filtration from MoS₂ nanosheets. The results indicated that MoS₂ membranes showed almost 100% retention of methyl orange within one hour, and up to 97% within four hours. Moreover, the flux showed 0.207L/m².h for a 5.8 μm-thick membrane, which was 3-5 times higher than GO membranes. The result of XPS test and SEM-EDS have demonstrated that there is no chemisorption between MoS₂ and MO, and the separation mechanism can basically owe to Donnan effect and sieve effect. This work suggests that molybdenum disulfide is an emerging filtration membrane material to increase the removal capacity of water contamination.

在这项工作中，为了开发用于废水处理的二维纳米过滤材料，已经研究了甲基橙（MO）通过二硫化钼膜在电渗作用下的排斥性能。可以通过机械剥落和真空过滤从MoS ₂纳米片制备层状和均质膜。结果表明，MoS ₂膜在1小时内显示了几乎100％的甲基橙保留，在4小时内显示了高达97％的保留率。此外，对于5.8μm厚的膜，通量显示为0.207L / m ² .h，是GO膜的3-5倍。XPS测试和SEM-EDS的结果表明MoS ₂之间没有化学吸附和MO，并且分离机理基本上可以归因于Donnan效应和筛分效应。这项工作表明二硫化钼是一种新兴的过滤膜材料，可以提高水污染物的去除能力。