Abstract
The layered transition metal dichalcogenides, molybdenum disulfide (MoS2) have received increasing attention and hold great potential applications in various fields due to its unique properties. In this work, the PDDA modified MoS2 nanosheets ([email protected]2 nanosheets) were prepared and then incorporated into polyelectrolyte multilayers through layer-by-layer self-assembly method to get a [email protected]2-PDDA/PSS hybrid membrane. The morphologies and structures of the resulted [email protected]2 nanosheets and hybrid membranes were characterized by X-ray diffraction, scanning electron microscope, transmission electron microscopy, X-ray photoelectron spectroscopy, energy dispersive spectroscopy and atom force microscopy. The nanofiltration performance of the hybrid membranes were investigated by retention of dyes and salts from aqueous solution. The result indicated that the hybrid membranes showed 98.4% retention of methyl blue with flux of 194.4 L/m2 h MPa, which was 2.3 times than that of pure polyelectrolytes membrane with flux of 82.7 L/m2 h MPa. And the hybrid membrane also showed rejection of salts in the sequence Na2SO4 > MgSO4 > NaCl > MgCl2. Moreover, the flux of the membrane remained around 180.0 L/m2 h MPa, while the rejection was maintained at about 98.0% during the 165 h running time, displaying good long term stability.
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