121st General Meeting of the KCS

Type Symposium
Area Recent Trends in Porous Inorganic Materials
Room No. Samda Hall B
Time FRI 15:20-:
Code INOR3-3
Subject Syntheses and applications of porous materials with adjustable structural properties
Authors Tae-Hyun Bae
Chemical and Biomedical Engineering, Tae-Hyun Bae, Singapore
Abstract Microporous materials possessing large surface areas and adjustable functionality have drawn a large amount of attention due to their wide range of applications. Such materials can potentially be used in molecular separations in both adsorptive and membrane-based configurations. In this presentation, our efforts to develop various crystalline porous materials, such as metal-organic frameworks (MOFs), covalent organic frameworks (COFs) and zeolites, with various forms including hierarchical porous structure and 2-dimensional layered structure will be introduced. Recently, we have synthesized hierarchical LTA zeolites containing organically functionalized mesoporous domain for the selective capture of targeted molecules. To design such materials, hierarchically porous zeolites were first synthesized by soft-templating method where the liquid crystal micelles made up with surfactants were served as the template for mesopore formation. Subsequently, organic groups were introduced to the mesopore surfaces via post-synthetic grafting method. Hierarchical mesoporous HKUST-1 MOF crystals were also synthesized by controlling various parameters in the solvothermal process. Detailed analysis revealed that the transport of molecules within the porous material were facilitated by mesoporosity introduced. Such strategy was successfully applied to zeolitic materials such as ZSM-5. Lastly, 2-D MOF nanosheets were synthesized at the interface of two solvents containing metal ions and ligand, respectively. MOF nanosheets could selectively transport molecules due to the size exclusion effect.
E-mail thbae@ntu.edu.sg