A method for the repair of defects in a graphene or other two-dimensional material through interfacial polymerization.

Membranes, methods of making the membranes, and methods of using the membranes are described herein. The membranes can comprise a support layer, and a selective polymer layer disposed on the support layer. The selective polymer layer can comprise an oxidatively stable carrier and a borate additive dispersed within a hydrophilic polymer matrix. The oxidatively stable carrier can comprise a quaternaryammonium hydroxide carrier (e.g., a mobile carrier such as a small molecule quaternaryammonium hydroxide, or a fixed carrier such as a quaternaryammonium hydroxide-containing polymer), a quaternaryammonium fluoride carrier (e.g., a mobile carrier such as a small molecule quaternaryammonium fluoride, or a fixed carrier such as a quaternaryammonium fluoride-containing polymer), or a combination thereof. The borate additive can comprise a borate salt, a boric acid, or a combination thereof. The membranes can exhibit selective permeability to gases. As such, the membranes can be for the selective removal of carbon dioxide and/or hydrogen sulfide from hydrogen and/or nitrogen.

A method of synthesis for an aluminophosphate-based zeolite membrane includes a steps of preparing a mixed solution with a pH greater than or equal to 6 and less than or equal to 9 by mixing an acidic phosphorous source with an alkali source, a steps of preparing a starting material solution by adding and mixing an aluminum source to the prepared mixed solution, and a steps of synthesizing an aluminophosphate-based zeolite membrane by hydrothermally synthesizing the starting material solution.

A filtration membrane, suitably for water filtration, in which the membrane includes a porous substrate layer and an active layer arranged over at least a part of the substrate layer. The active layer has a lamellar structure comprising at least two layers of two-dimensional material. The two-dimensional material comprises transition metal dichalcogenide. There is also provided methods for making the filtration membranes and compositions for use in those methods.

A method for preparing a super-hydrophobic membrane by cleaning a metal mesh by immersion in an organic solvent; subjecting the cleaned metal mesh to a surface modification treatment to increase its hydrophilicity; coating the treated metal mesh with a hydrophobic organic substance; and drying the metal coated mesh for obtaining the super-hydrophobic membrane. The super-hydrophobic membrane obtained thereby.

In a first aspect, the present disclosure relates to a method for forming a diamond membrane, comprising: providing a substrate having an amorphous dielectric layer thereon, the amorphous dielectric layer comprising an exposed surface, the exposed surface having an isoelectric point of less than 7, preferably at most 6; seeding diamond nanoparticles onto the exposed surface; growing a diamond layer from the seeded diamond nanoparticles; and removing a portion of the substrate from underneath the diamond layer, the removed portion extending at least up to the amorphous dielectric layer, thereby forming the diamond membrane over the removed portion.

The present invention pertains to a polycrystalline membrane containing metal nitride particles represented by the general formula MN.sub.x (where M is a metal element in which the Fermi energy is in a position higher than 4.4 eV vs L.V. and x is the range over which a rock salt-type structure can be assumed), in which the crystallite size determined by transmission electron microscopy is 10 nm or less, at least some of the crystallites have rock salt-type structure, and the crystallites exhibit (111) orientation but substantially do not exhibit (100) orientation. The present invention also pertains to a method for manufacturing a polycrystalline membrane, comprising forming, by sputtering, a polycrystalline membrane on a substrate having a temperature of less than 200 C., the polycrystalline membrane being represented by the general formula MN.sub.x and being such that at least some crystallites have a rock salt structure and the crystallites exhibit (111) orientation but essentially do not exhibit (100) orientation. The present invention provides a hydrogen-permeable TiN.sub.x microparticle membrane exhibiting a higher mixed hydride ion (H.sup.)-electron conduction.

Provided is a method of producing a zeolite film continuously and efficiently. The method of forming zeolite on a surface of a support is characterized in that the method includes: a first step of attaching zeolite fine crystals to a surface of a support; a second step of preparing synthetic gel for growing the fine crystals; a third step of putting the support and the synthetic gel into a continuous reactor and performing hydrothermal synthesis; and a fourth step of cleaning the support on which zeolite has been hydrothermally synthesized, and in the third step, the temperature, pressure, and flow of the synthetic gel in the continuous reactor is adjusted, the support is moved being immersed in the synthetic gel, the reaction time of the hydrothermal synthesis is adjusted by adjusting the time from when the support enters the continuous reactor to when the support exits the continuous reactor.

A membrane includes a porous polymer substrate, and at least a first layer of graphene platelets supported by the substrate. The graphene platelets of the first layer include aminated graphene platelets. A method for making a membrane includes providing a porous polymer substrate, providing a first suspension of graphene platelets in a fluid, wherein the graphene platelets of the first suspension are aminated graphene platelets, and applying the first suspension to the substrate to deposit a layer of the aminated graphene platelets on the substrate.

A thin film composite gas separation membrane comprising a polyether block amide copolymer coating layer and a nanoporous asymmetric support membrane with nanopores on the skin layer surface of the support membrane and gelatin polymers inside the nanopores on the skin layer surface of the support membrane. A method for making the thin film composite gas separation membrane is provided as well as the use of the membrane for a variety of separations such as separations of hydrogen sulfide and carbon dioxide from natural gas, carbon dioxide removal from flue gas, fuel gas conditioning, hydrogen/methane, polar molecules, and ammonia mixtures with methane, nitrogen or hydrogen and other light gases separations, but also for natural gas liquids recovery and hydrogen sulfide and carbon dioxide removal from natural gas in a single step.