The present invention provides novel chromatographic materials, e.g., for chromatographic separations, processes for their preparation and separations devices containing the chromatographic materials. The preparation of the inorganic/organic hybrid materials of the invention wherein a surrounding material is condensed on a superficially porous hybrid core material will allow for families of different hybrid packing materials to be prepared from a single core hybrid material. Differences in hydrophobicity, ion-exchange capacity, chemical stability, surface charge or silanol activity of the surrounding material may be used for unique chromatographic separations of small molecules, carbohydrates, antibodies, whole proteins, peptides, and/or DNA.

A high-adsorption-performance nanofiber filter medium includes a support material and a composite nanofiber filtration layer that includes multiple nanometer composite nanofiber layers deposited and stacked on the support material. The nanometer composite nanofiber layer includes first, second, and third nano-powder composite nanofibers, which are uniformly mixed by means of an airflow or are sequentially laminated to form the nanometer composite nanofiber layer. The nanometer composite nanofiber layer formed through sequential lamination includes first, second, and third nanofiber layers. The first nanofiber layer includes multiple first nano-powder composite nanofibers. The second nanofiber layer is stacked on the first nanofiber layer and includes multiple second nano-powder composite nanofibers. The third nanofiber layer is stacked on the second nanofiber layer and includes multiple third nano-powder composite nanofibers. The composite nanofiber filtration layer is formed of multiple nanometer composite nanofiber layers, so that the high-adsorption-performance nanofiber air filter medium shows improved performance.

A method for preparing a core-shell structure polymer magnetic nanosphere with a high Cr (VI) adsorption capacity includes: adding Fe3O4 powder into a mixed solution of water and ethanol, dispersing Fe3O4 powder in the solution evenly by ultrasound, sequentially adding resorcinol and formaldehyde into the suspension to adjust a pH, stirring and reacting to obtain Fe3O4@RF evenly dispersed in a chitosan solution, dropwise adding the prepared suspension into a mixed solution of paraffin and span 80, stirring for a period of time, adding a glutaraldehyde aqueous solution, stirring and reacting to obtain a magnetic chitosan nanosphere. The magnetic chitosan nanosphere prepared may be applied to adsorbing Cr (VI) in a water solution. Not only the magnetic chitosan nanospheres prepared has a high adsorption capacity for Cr (VI), but also can be quickly separated by an external magnetic field after adsorption.

The invention concerns a method for producing a chromatography analysis column, the resulting column, and a device comprising such a column. The method according to the invention comprises the following steps: (a) depositing on the flat surface of a substrate a first layer of particles which are intended to form the stationary phase; (b) depositing on the layer at least one second layer of compactly assembled particles; (c) impregnating the first and second layers with a light radiation-sensitive material, to form at least two compactly assembled particle layers impregnated with sensitive material; (d) insolating these layers in the regions corresponding to the desired internal shape of the chromatography analysis column, if the light radiation-sensitive material behaves like a positive resin, or outlining this internal shape if the light radiation-sensitive material behaves like a negative photosensitive resin; (e) eliminating either the regions insolated in step (d) if the light radiation-sensitive layer behaves like a positive photosensitive resin, or the regions not insolated in step (d) if the light radiation-sensitive material behaves like a negative photosensitive resin; and (f) covering and sealing the structure obtained in step (e) with a cover covered on the face facing the layers with at least one layer of compactly assembled particles which are identical to or different from those deposited on the substrate surface. The invention is used in particular in the field of chemical analysis.

This disclosure relates to graphene derivatives, as well as related devices including graphene derivatives and methods of using graphene derivatives.

Methods of making a poly(propylenimine) (PPI) sorbent, a PPI sorbent, structures including the PPI sorbent, methods of separating CO.sub.2 using the PPI sorbent, and the like, are disclosed.

Provided is a method for manufacturing a porous body by which a porous body including a plurality of layers different from each other in pore diameter may be manufactured by a fewer steps than before. The method includes: synthesizing a mixture of a non-interpenetrated metal-organic framework and an interpenetrated metal-organic framework; and obtaining a porous body including a stack of a non-interpenetrated metal-organic framework layer and an interpenetrated metal-organic framework layer from the mixture synthesized in the synthesizing, via a process of separating the non-interpenetrated metal-organic framework and the interpenetrated metal-organic framework from each other by utilizing density differences.

A separation membrane structure comprises a porous support, a first separation membrane formed on the porous support, and a second separation membrane formed on the first separation membrane. The first separation membrane has an average pore diameter of greater than or equal to 0.32 nm and less than or equal to 0.44 nm. The second separation membrane includes addition of at least one of a metal cation or a metal complex that tends to adsorb nitrogen in comparison to methane.

Superficially porous particles are provided. Aspects of the superficially porous particles include a non-porous inner core and a porous outer shell that includes inner and outer porous regions. The inner porous region can include ordered cylindrical pores substantially perpendicular to the non-porous inner core. The outer porous region can include conical pores which extend to the surface of the particles and which are in fluid communication with the cylindrical pores of the inner porous region. Also provided are methods of making the subject superficially porous particles. Aspects of the methods include subjecting substantially solid inorganic oxide particles to agitation in an aqueous solution in the presence of a first cationic surfactant and a second anionic surfactant, which together form micelles, to pseudomorphically transform the particles.

The invention concerns biocompatible polymer systems comprising at least one polymer with a plurality of pores, said polymer comprising either polyol or zwitterionic groups designed to adsorb endotoxins and other inflammatory mediator molecules. The inventions are in the field of porous polymeric sorbents, also in the field of broadly reducing endotoxins in blood and blood products that can cause endotoxemia, additionally, in the field of broadly removing endotoxins by perfusion or hemoperfusion.