Two Dimensional Nanostructure based Membranes for Water Filtration Webinar
Description or Abstract
Providing an adequate supply of potable water is one of the grand challenges in the current century due to climate change, population and industrial growth. The rapid development of membranes for nanofiltration, reverse osmosis, and forward osmosis during the last few decades has shown that these processes are viable approaches for separating contaminants from wastewater. However, the advancement of membrane technology is severely hampered by the long-standing problem of fouling, which is caused by the accumulation of foreign substances on membrane surfaces or inside pores. Rapid advances in nanotechnology, such as two-dimensional (2D) nanostructures, have resulted in numerous nanomaterials with properties that are potentially useful in membrane processes. The overall objective of our research is to design novel hybrid membranes based on emerging two-dimensional nanostructures that will provide not only enhanced desalination but also enhanced water flux and antifouling properties. For this study, we investigated the antifouling and desalination properties of several 2D nanomaterials including molybdenum disulfide (MoS2), graphene oxide (GO), reduced graphene oxide (rGO). Our findings indicate that 2D nanomaterial-functionalized membranes possess superior antifouling performance over commercially available desalination membranes. Results from desalination studies indicate that graphene provides high salt rejection while MoS2 provides superior antifouling and water flux. Furthermore, MoS2 sandwiched between GO multilayer in the hybrid membranes offered frictionless water flow due to the smooth and rigid structure of MoS2, while the satisfied salt rejection performance was attributed to GO. Overall, 2D nanomaterial-based hybrid membranes showed great potential for water filtration.
Center of Excellence for Water
Dahlia El Oraby
Chowdury, Indranil, "Two Dimensional Nanostructure based Membranes for Water Filtration Webinar" (2020). Audiovisual Projects. 9.