Perspectives in Adsorptive and Catalytic Mitigations of NO_x Using Metal–Organic Frameworks

Abstract

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Computational Exploration of a Metal(II) Catecholate-Functionalized UiO-66 Nanoporous Metal–Organic Framework for Effective NOx Capture

“…Among the family of porous materials, activated carbons and diverse zeolites, including mordenite, ZSM-5, and faujasite, have been revealed as potential candidates for NO x capture; − however, they have some limitations due the high reactivity and acidic nature of NO x , which led to either a collapse of the porous structures or regeneration issues. More recently, nanoporous metal–organic framework (MOF) − structures have been proposed as an alternative solution for NO x capture at low pressure because of the large variety of NO x -specific adsorption sites that can be incorporated into their pore walls. Besides MFM-300 , and MFM-520, which were found to exhibit high NO 2 adsorption capacity at low pressure, the presence of accessible metal sites either in the inorganic nodes or grafted to the organic linker of the MOF has been demonstrated to be a key for the selective adsorption of highly polar molecules such as NO x . − Typically, the MOF-74 architectures containing open-metal sites in the inorganic nodes have been found to be attractive for NO capture in a relatively broad range of gas pressures, 0.1–1 bar .…”

“…More recently, nanoporous metal–organic framework (MOF) − structures have been proposed as an alternative solution for NO x capture at low pressure because of the large variety of NO x -specific adsorption sites that can be incorporated into their pore walls. Besides MFM-300 , and MFM-520, which were found to exhibit high NO 2 adsorption capacity at low pressure, the presence of accessible metal sites either in the inorganic nodes or grafted to the organic linker of the MOF has been demonstrated to be a key for the selective adsorption of highly polar molecules such as NO x . − Typically, the MOF-74 architectures containing open-metal sites in the inorganic nodes have been found to be attractive for NO capture in a relatively broad range of gas pressures, 0.1–1 bar . while PCN-250 with Fe­(III) partially substituted by Co­(II), Mn­(II), and Zn­(II) was predicted to exhibit a high binding energy for NO 2 of importance for sensing applications .…”

Adsorption and Degradation of Volatile Organic Compounds by Metal–Organic Frameworks (MOFs): A Review

“…This temperature can be further lowered if the MOF platform was optimized by adding nanoparticles within their pores. Highly stable MOF materials such as the MIL family have demonstrated superior chemical stability toward NO species, which has been confirmed by comparing X-ray diffraction (XRD) patterns of the samples before and after NO exposure [124].…”

Review and Perspectives of Monolithic Metal–Organic Frameworks: Toward Industrial Applications

“…They help determine the size and morphology of MOFs . Compared with ionic liquids and other organic solvents, surfactants possess higher thermal and chemical stability and lower vapor pressure . Strategies for the assisted synthesis, regulation, and control of multifunctional monolithic MOFs with surfactants such as polyvinylpyrrolidone (PVP), polyethylene glycol-400 (PEG-400), and cetyltrimethylammonium bromide (CTAB) have gained extensive research interest …”