Covalently Bound MOF/COF Aerogels as Robust Catalytic Filters for Rapid Nerve Agent Decomposition

Author(s): Martin Sahul, Youven Benseghir, Tanja Eder, Flora Schöfbeck, Lingcong Ge, Dániel Hetey, Michael R. Reithofer, Jia Min Chin
Abstract: Metal-organic frameworks (MOFs) show promising results in various fields, such as gas separation and catalysis, but they face limitations due to problems associated with their low processability. This study addresses these challenges by utilizing postsynthetic modification (PSM) of NH₂-UiO-66 and NH₂-MOF-808 with 1,3,5-benzene tricarbaldehyde (BTCA) to form hybrid aerogels consisting of MOF-loaded covalent organic framework (COF). BTCA-modified MOF nanoparticles via imine bond formation were confirmed by ¹H NMR, FTIR, and solid-state ¹³C NMR spectroscopies. MOF/COF composites were analyzed via TGA, PXRD, BET, and solid-state ¹³C NMR, showing retained crystallinity and increased porosity in comparison to the sum of the individual components. Moreover, improved aerogel mechanical properties and increased MOF loading of up to 75 wt % were achieved for covalently bound aerogels. Hybrid aerogel composites were successfully utilized as catalytic filters for the decomposition of nerve agent simulant and pesticide dimethyl-4-nitrophenylphosphate (DMNP), avoiding secondary pollution associated with MOF powder catalysis.
Organisation(s): Department of Functional Materials and Catalysis, Department of Inorganic Chemistry
External organisation(s): Vienna Doctoral School in Chemistry (DoSChem)
Journal: ACS Applied Materials and Interfaces
ISSN: 1944-8244
DOI: https://doi.org/10.1021/acsami.4c19759
Publication date: 2025
Peer reviewed: Yes
Austrian Fields of Science 2012: 104003 Inorganic chemistry, 104015 Organic chemistry, 205004 Functional materials, 205019 Material sciences
Keywords
ASJC Scopus subject areas: General Materials Science
Portal url: https://ucrisportal.univie.ac.at/en/publications/b3660ab1-b20f-4f4b-9357-aa722d84fe14