This invention discloses a method for preparing an antibacterial and dust-removal membrane. The method comprises the following steps: depositing a layer of nano-ZnO on the immersed membrane surface as the seed crystal with the atomic layer deposition instrument (ALD instrument); vertically immersing the membrane covered with nano-ZnO layer in a hydrothermal reactor filled with crystal growth solution, heating it for a period of time, taking the membrane out and cooling it to the room temperate, and removing it from the substrate; finally, heating this membrane in a drier, and purging it with nitrogen to remove the paraffin within the membrane pore to obtain the porous membrane with nano-ZnO arrays growing on the surface.

The present disclosure describes a process of obtaining a carbon membrane derived from polymer polybenzoxazine, for improved separation of gases with different kinetic diameters such as helium (2.60 ), hydrogen (2.89 ), carbon dioxide (3,30 ), oxygen (3.46 ), nitrogen (3.64 ), carbon monoxide (3.70 ), methane (3.80 ), ethylene (4.23 ) and ethane (4.42 ) from the molecular sieving mechanism.

A high-flux silicon carbide ceramic filter membrane and a preparation method thereof are provided. In the preparation method, a separation layer is directly coated at a time on the basis of a support, that is, after the support is sintered, the separation layer is directly coated and then sintered for carbon removal. In the present disclosure, a sintering process and a coating formula are optimized to prevent fine silicon carbide particles from entering micropores of a support due to capillary filtration and film formation during coating, such that a separation layer with an average pore size of 0.2 m or less can be directly coated on a silicon carbide support with an average pore size of 10 m or more, and fine silicon carbide particles can be effectively prevented from entering micropores of the support during the coating.

Hybrid membranes based on crystalline titanium dioxide containing fluorine atoms within the crystalline lattice comprising atoms of titanium and oxygen are described; these hybrid membranes are particularly suitable for the production of fuel cells and electrolysers. A process for producing the aforesaid hybrid membranes is also described.

The present disclosure provides a rigid self-supporting MXene separation membrane and a preparation method and use thereof, belonging to the technical field of membranes. In the present disclosure, a MXene material is mixed with an aluminum salt powder to conduct one-step membrane formation by hot-pressing. The pressure forms the powder into a membrane and imparts rigidity, enabling a self-supporting structure; the heating breaks an ionic bond of an inorganic metal salt to reach a molten ionic state, and free metal cations react with active oxygen-containing functional groups on the surface of the MXene to form new chemical bonds (such as an AlO bond); such a chemical bond has higher energy, achieving a desirable anti-swelling effect to improve the membrane stability. The separation membrane further has excellent conductivity and hydrophilicity.

At least one aspect of the present disclosure relates to a two-dimensional mineral membrane including a first phyllosilicate material and a second phyllosilicate material crosslinked with the first phyllosilicate material, where a surface of at least one of the first phyllosilicate material or the second phyllosilicate material includes at least one functional group. Another aspect of the present disclosure relates to a method of producing a two-dimensional mineral membrane. The method includes providing a first phyllosilicate material and a second phyllosilicate material, exfoliating a mixture of the first phyllosilicate material and the second phyllosilicate material into a plurality of flakes, crosslinking the first phyllosilicate material with the second phyllosilicate material, functionalizing a surface of at least one of the first phyllosilicate material or the second phyllosilicate material, and restacking the plurality of flakes to form a membrane.

Filtration apparatus including Graphene Oxide (GO) are described herein. The GO membranes include a plurality of graphene oxide sheets, each of the graphene oxide sheets covalently bound to a chemical spacer. The filtration apparatus can include a GO membrane and a sulfonated polyethersulfone (S-PES). The filtration apparatus can exhibit improved performance with respect to prior art membranes (e.g., high flux and rejection rate) in applications such as pulp and paper processing, which facilitates achieving permeate quality targets. The filtration apparatus described herein can also offer a more stable replacement for reverse osmosis membranes which are known to degrade under strongly alkaline conditions and high temperatures.

A method of producing a silicalite membrane, which includes heating an aqueous solution that includes a dopant precursor and structure-directing template agents to form silicalite seeds incorporated with a dopant, depositing a buffer layer on a ceramic substrate prior to depositing the silicalite seeds on the buffer layer, contacting the ceramic substrate with a solution including the silicalite seeds to form a silicalite layer from the silicalite seeds on the ceramic substrate, and removing the structure-directing template agents to form the silicalite membrane, where the silicalite layer includes silicalite crystals incorporated with a dopant and each of the silicalite crystals has a hollow structure which forms the pores of the silicalite layer. The silicalite membrane includes a ceramic substrate having a buffer layer formed thereon, and a silicalite layer formed on the buffer layer, where the silicalite layer includes silicalite crystals incorporated with a dopant.