Improved integrally skinned asymmetric membranes for organic solvent nanofiltration, and their methods of preparation and use are disclosed. Membranes are formed from polybenzimidazoles by phase inversion and are then crosslinked by addition of crosslinking agents. These stabilise the membranes and allow solvent nanofiltration to be maintained even in the solvents from which the membranes were formed by phase inversion, and in strongly acidic and strongly basic solvents.

A method of removing an organic micropollutant from a treatment solution including passing the treatment solution through a membrane, and collecting a filtered solution. The filtered solution contains at least 50% less of the organic micropollutant than the treatment solution. The membrane includes a polysulfone support and an active layer containing zinc oxide (ZnO) nanoparticles.

A filtration membrane including a first layer comprising a polyester terephthalate nonwoven fabric, a second layer comprising a polyvinylidene fluoride matrix doped with a polyvinylpyrrolidone and titanium dioxide nanoparticles, and a third layer comprising a polypyrrole polymer. A method of making the membrane is also described. The membrane of the present disclosure is self-cleaning under visible light irradiation conditions.

Disclosed are a composite membrane and a method of manufacturing the same. More particularly, disclosed are a composite membrane, which includes a porous support and an active layer deposited on a surface of the porous support, and a method of manufacturing the composite membrane using concentration polarization of a network-nanoparticle-dispersed organic sol-containing solution on a surface of the porous support.

A process for making an iron oxide impregnated carbon nanotube membrane. In this template-free and binder-free process, iron oxide nanoparticles are homogeneously dispersed onto the surface of carbon nanotubes by wet impregnation. The amount of iron oxide nanoparticles loaded on the carbon nanotubes range from 0.25-80% by weight per total weight of the doped carbon nanotubes. The iron oxide doped carbon nanotubes are then pressed to form a carbon nanotube disc which is then sintered at high temperatures to form a mixed matrix membrane of iron oxide nanoparticles homogeneously dispersed across a carbon nanotube matrix. Methods of characterizing porosity, hydrophilicity and fouling potential of the carbon nanotube membrane are also described.

Membranes, methods of making the membranes, and methods of using the membranes are described herein. The membrane can include a support layer; and a selective polymer layer disposed on the support layer. The selective polymer layer can include a selective polymer matrix that comprises a mobile carrier comprising an alkanolamine or a salt thereof. The selective polymer matrix can further comprise, for example, a hydrophilic polymer, a cross-linking agent, a low molecular weight amino compound, an amine-containing polymer, a CO.sub.2-philic ether, or a combination thereof. In some embodiments, the selective polymer matrix can further comprise graphene oxide dispersed within the selective polymer matrix. The membranes can be used to separate carbon dioxide from hydrogen. Also provided are methods of purifying syngas using the membranes described herein.

A filtration membrane includes an alumina support; a polyamide network disposed on the alumina support and formed by polycondensation between piperazine (PIP) and isophthaloyl dichloride (IPC); and a polypyrrole-graphitic carbon nitride (PPy-G-C.sub.3N.sub.4) photocatalyst embedded in the polyamide network through covalent bonding, the PPy-G-C.sub.3N.sub.4 photocatalyst including nanosheets of graphitic carbon nitride (G-C.sub.3N.sub.4) embedded in a matrix of a polypyrrole (PPy) polymer. The membrane of the present disclosure can be used for separating oil and water.

A method of removing carbon dioxide from a gas can include providing a gaseous feed stream including a carbon dioxide gas and adsorbing the carbon dioxide gas with a porous carbon sorbent. The method can further include de-adsorbing the carbon dioxide and combining the carbon dioxide with a substantially pure hydrogen gas to produce at least one of methane and methanol. The adsorbing and de-adsorbing of the carbon dioxide gas can be conducted by an electric swing adsorption.

This invention relates to a device comprising polyethylene sulfone (PES) and additional suitable polymers with high load of Prussian blue analogue nanoparticles for removal of monovalent or divalent cation contaminants, optionally doped, and process for the preparation and methods for use thereof. The device and method relate to selectively and effectively remove ammoniacal nitrogen removal and recovery as a valuable resource, and removing radioactive cesium and/or other monovalent or divalent cations from contaminated water.

The present invention relates to design and manufacture of multilayer sintered membranes made from metals and inorganic compounds (ceramics, silicate, clay, zeolites, phosphates, etc.). The membranes are designated for separation of water. They comprise at least one layer having nanopores commensurable with the size of water molecules. The membranes comprise: (a) supporting metallic layer having pore size 1-500 microns, (b) metallic interlayer having pore size <2 micron, (c) sublayer with local regular protrusions of the interlayer into the supporting layer to increase service life of the membrane, and (d) one nanoporous ceramic or metallic top layer having pore size in the range of 1-15 angstroms. The invented design and method allow the manufacture of cost-effective multilayer membranes containing nanoporous layer with controlled pore sizes in each layer and optimal morphology of pores that provides selective transport of molecules during filtration and separation of liquids.