Carbon dioxide adsorbents are provided. The carbon dioxide adsorbents include a polymeric amine and a porous support on which the polymeric amine is supported. the polymeric amine consists of a polymer skeleton containing nitrogen atoms and branched chains bonded to the nitrogen atoms of the polymer skeleton. Each of the branched chains contains at least one nitrogen atom. the polymeric amine is modified by substitution of at least one of the nitrogen atoms of the polymer skeleton or the branched chains with a hydroxyl group-containing carbon chain.

A method for surface treatment of acrylate-based superabsorbents may include preparing a treatment solution including water, an organic solvent, and a silane compound; applying the treatment solution to a plurality of acrylate-based superabsorbents to form a mixture; and fabricating modified acrylate-based superabsorbents by subjecting the mixture to heating or microwave irradiation.

The present disclosure provides a method for preparing a high cohesive energy adsorbent for fluoride removal, which includes the following steps: S1. adding NaHF.sub.2—NiF.Math.6H.sub.2O additive to SiCO ceramic powder, and sintering at a temperature of 310-330° C. for 18-22h to obtain a sintered substance; S2. grinding the sintered substance to obtain particles with a size of 2-3 mm, and mixing the particles with polyacrylonitrile to form a composite polymer; and S3. molding the composite polymer by a vacuum baking process at a temperature of 75-85° C., then performing ball milling and sieving to obtain the high cohesive energy adsorbent for fluoride removal. The high cohesive energy adsorbent for fluoride removal may be used in the adsorption and separation of the C.sub.2F.sub.6—CHF.sub.3—CClF.sub.3 mixture system, and the contents of CHF.sub.3 and CClF.sub.3 are lowered to less than 10ppmv.

A separation membrane, suitably for oil and water separation. The membrane including a porous substrate layer and an active layer arranged over at least a part of the substrate layer. The active layer includes a hydrophilic agent and a superhydrophilic agent. Also described is a method of producing the separation membrane and a drain valve comprising the membrane.

A porous polymer monolith comprises a polymer body having macroporous through-pores that facilitate fluid flow through the body and an array of mesopores adapted to bind from the fluid flow molecules of a predetermined range of sizes, wherein the surface area of the monolith is predominantly provided by the mesopores. Also disclosed is a method of making a porous polymer monolith. The method includes forming a polymer body by phase separation out of a solution containing at least a monomer, a crosslinker and a primary porogen, whereby the body contains multiple macroporous through-pores, wherein the solution further contains a secondary porogen comprising oligomers inert with respect to the monomer and cross-linker but chemically compatible with the monomer so as to form mesostructures within the polymer body during said phase separation, and washing the mesostructures from the body to provide an array of mesopores such that the surface area of the monolith is predominantly provided by the mesopores.

This invention relates to a new stationary phase carrying functional groups comprising a halogen substituted aromatic ring. Target molecules can interact with this stationary phase by halogen bonding. The stationary phase is suitable for SPE or chromatographic separations.

A composition is provided that has heat resistance sufficient for use as a hydrocarbon adsorbent and desorbs hydrocarbons slowly with respect to an increase in temperature. The composition includes an alkali metal and a zeolite having a YFI structure. A content of the alkali metal is 1 to 40 mass% based on a total mass of the composition, and a content of the zeolite having a YFI structure is 99 to 60 mass% based on the total mass of the composition.

A zearalenone functionalized graphene surface molecularly imprinted material, a preparation method therefor and the use thereof, which belong to the technical field of molecularly imprinted materials. The zearalenone functionalized graphene surface molecularly imprinted material is prepared by using RGO as a carrier, CDHB as a template molecule, 1-ALPP as a functional monomer, TRIM as a cross-linking agent, AIBN as an initiator, and acetonitrile as a pore-forming agent.

The present disclosure provides systems and methods for direct air capture of carbon dioxide or other gases through a calcium sorbent in a manner that allows for wide scale, relatively low cost implementation. In particular, a calcium sorbent may be provided as a substantially thin coating on one or more substrates and utilized for direct air capture of carbon dioxide through chemisorption. The carbonated sorbent may be disposed of for sequestration of the carbon dioxide or regenerated with capture of carbon dioxide released from the carbonated sorbent during the regeneration process.

Contaminate-sequestering coatings including a network of hydrolyzed silane compounds including a plurality of thiol functional groups, a plurality of fluorinated functionalities, or both are provided. The contaminate-sequestering coatings may sequester one or more per- and polyfluoroalkyl substances (PFAS), heavy metals, biological species or any combination thereof. Methods of functionalizing a substrate surface with contaminate-sequestering functionalities that sequester one or more PFAS, heavy metals, or both are also provided. Methods of removing contaminants from contaminate-containing liquids, and devices including the contaminate-sequestering coatings are also provided.