Zeolites and Other Structurally Microporous Solids as Acid–Base Materials

An adamantane-based COF: stability, adsorption capability, and behaviour as a catalyst and support for Pd and Au for the hydrogenation of nitrostyrene

“…Covalent-organic frameworks (COFs), as either crystalline or amorphous materials, are part of this class. They exhibit high porosity and low crystal density, 1 and are typically synthesized from monomers connected by covalent bonds of multidentate organic bridging ligands. 2 Similar to crystalline inorganic zeolites 3 and metalorganic frameworks (MOFs), 4 COFs possess well-defined and predictable two-or three-dimensional pore structures.…”

“…As an example, palladium has been encapsulated in microporous polymeric networks, CMPs, via palladium-catalyzed polymerization followed by a thermal treatment. 1 Pd/CMP treated in hydrogen was active for the selective hydrogenation of 4-nitrostyrene to 4-ethylnitrobenzene.…”

CO2 capture by coal ash-derived zeolites- roles of the intrinsic basicity and hydrophilic character

“…Various Si/Al ratios induce different amount of Na þ cation on the zeolite surface. Therefore, different interactions are expected to occur with different zeolites frameworks at different locations within a given framework [66]. The distribution strength is expected to narrowly correlate to the number of next-neighboring tetrahedra around a given exchangeable site, and, thereby strongly depends on the lattice structure and topology [65,67].…”

Enhanced Removal of As(V) and Pb(II) from Drinking and Irrigating Water Effluents Using Hydrothermally Synthesized Zeolite 5A

“…Zeolites have demonstrated remarkable adsorption capacities for heavy metals in aqueous solutions and desalinization processes due to their porosity and chemical composition characteristics. Several researchers have studied the removal of As(V) and Pb(II) using both natural and synthetic zeolites [16][17][18][19][20][21]; however, natural zeolites have a disadvantage in their composition since they have other metals and crystalline phases [22]. Among the different types of zeolites, zeolites A are promising due to their well-defined structure and high porosity, as well as due to their high cation exchange capacity and large number of active sites.…”