Carbon Dot Modified Metal-Organic Frameworks

Arik Raslin raslin@post.bgu.ac.il Gil Otis Raz Jelinek Idan Hod
Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer Sheva, Israel

Metal-Organic Frameworks (MOFs) are a class of porous materials consisting of coordination networks of metal-based nodes and organic linkers. In recent years, MOFs have attracted a great deal of scientific interest, mainly due to their high surface area, well-defined crystallinity, and chemical flexibility. Traditionally, MOFs have been studied for applications such as gas storage and separation, chemical sensing, and chemical catalysis [1]. New methods for depositing MOFs on surfaces have aroused interest in their exploration for electrochemistry as well. However, up until now, charge transport in MOFs is still considered a key bottle-neck for obtaining efficient electro-activity. Here we demonstrate a facial route to post-synthetically modify MOFs with a layer of Carbon dots (C-Dots), serving as a charge relaying channel, while preserving the MOF’s intrinsic porosity [2]. Upon modification, we witness 3-orders of magnitude increase in the MOF’s conductivity. The obtained results should open a path for designing new conductive MOF-based systems and their exploitation in a variety of applications as electrochemical energy storage and conversion and photo-electrochemistry.

[1]. Katz M. J., Farha O. K., Chem. commun., 2013, 49, 9449-9451.

[2]. De B., Balamurugan J., Kim N. H., Lee J. H., ACS Appl. Mater. Interfaces, 2017, 9, 2459-2468









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