Sol-gel processing of a covalent organic framework for the generation of hierarchically porous monolithic adsorbents

Covalent organic frameworks for CO2 capture: from laboratory curiosity to industry implementation

“…Fairen-Jimenez and co-authors reported a process to shape COFs into robust porous monoliths without introducing templates, additives, or binders. 120 Such a process can minimize mechanical damage from shear-induced plastic deformation for COFs and maintain CO 2 capture performance.…”

Metal-organic frameworks and plastic: an emerging synergic partnership

“…Like MOFs, COFs feature high chemical stability, regular porous networks, large surface area; and versatile structures, which allow easy surface modification. They can also be usefully integrated in functional composite materials [ 154 ] or processed to form hierarchically porous adsorbents [ 155 ]. COFs have been investigated for different applications, including adsorption of different pollutants from water and catalytic, electrocatalytic and photocatalytic applications for several reactions, demonstrating enhanced performances and good recyclability [ 156 , 157 ].…”

A General Group-Protection Synthesis Strategy to Fabricate Covalent Organic Framework Gels

“…Covalent organic frameworks (COFs), as an emerging class of crystalline porous polymeric materials, have demonstrated various applications in diverse fields, including separation, catalysis, optoelectronics, energy storage, drug delivery, water capture, desalination of seawater, and so on, attributed to their well-defined structures, customizable functionalities, tunable pore size, high porosity, and high chemical/thermal stability. − COFs can be ideal candidates to fabricate COF gels due to the following reasons: (i) Designable reaction monomers could control reaction pathways, facilitating gel formation; − (ii) abundant topography of COFs could support bottom-up gel formation (e.g., COF fibers, COF nanosheets, and COF monoliths endow the possibility of gradual cross-linking within COF gels); − (iii) the abundant functional groups in COFs facilitate the formation of gel networks (e.g., hydrogen bond, Coulomb force, physical entanglement); − (iv) the robustness of COF structures endows COF gels with good stability (e.g., air stability, solvent stability, pH stability). − Currently, only a limited number of COF gels are reported, mainly used as aerogels and organogels for dye and oil–water separation, uptake of organic solvents, iodine adsorption, lithium-ion batteries, etc. − The development of COF organohydrogels is still underexplored. And, solvent exchangeability, frost resistance, and the formation mechanism of COF gels have not been explored yet.…”