Speaker: Dan Zhao
Affiliation: Department of Chemical and Biomolecular Engineering, NUS)
Abstract Details: The large-scale anthropogenic carbon dioxide (CO2) emission has aroused world-wild concerns nowadays. One of the key steps in carbon mitigation is CO2Â capture from stationary CO2Â emission sources such as power plants. Membrane-based gas separation has been greatly developed in recent years. In order to combine the merits of both polymeric and inorganic membranes, mixed matrix membranes (MMMs) were invented by dispersing porous fillers into continuous polymeric matrices hoping to increase the permeability and selectivity of the resultant membranes while preserving the properties of good mechanical strength and processability of the polymeric matrices. In this presentation, I will introduce our work in preparing MMMs containing lamellar metal-organic frameworks (MOFs) or covalent organic frameworks (COFs) nanosheets with high-aspect-ratio, which exhibit good gas separation performance because of the increased tortuosity of gas permeation paths imposed by lamellar nanosheets. In addition, I will discuss the direct fabrication of ultrathin membranes composed of 2D graphene oxide (GO) or MOF nanosheets. Because of their ultra-small thickness and precisely tunable pore size and functionality, these novel membranes may demonstrate unprecedented gas separation performance with wide applications in clean energy and environmental sustainability.
About the Speaker: Dr. Dan Zhao obtained his BS (2003) and MS (2006) in Polymer Chemistry and Physics from Zhejiang University, and PhD (2010) in Inorganic Chemistry from Texas A&M University. After finishing his postdoctoral training at Argonne National Laboratory, he joined the Department of Chemical & Biomolecular Engineering at National University of Singapore in July 2012 as an Assistant Professor. His research interests include advanced porous materials and membranes with the applications in clean energy and environmental sustainability.