Abstract
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 0.207 L/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.
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