The present invention relates to a process for the preparation of a zeolitic material having a CHA-type framework structure comprising YO.sub.2 and X.sub.2O.sub.3, wherein said process comprises the steps of: (1) providing a mixture comprising one or more sources for YO.sub.2, one or more sources for X.sub.2O.sub.3, one or more tetraalkylammonium cation R.sup.1R.sup.2R.sup.3R.sup.4N.sup.+-containing compounds, and one or more tetraalkylammonium cation R.sup.5R.sup.6R.sup.7R.sup.8N.sup.+-containing compounds as structure directing agent; (2) crystallizing the mixture obtained in step (1) for obtaining a zeolitic material having a CHA-type framework structure; wherein Y is a tetravalent element and X is a trivalent element, wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, and R.sup.7 independently from one another stand for alkyl, and wherein R.sup.8 stands for cycloalkyl, as well as to zeolitic materials which may be obtained according to the inventive process and to their use.

A small pore size synthetic zeolite having a degree of crystallinity of at least 80% and comprising at least 0.01 wt % based on the weight of the zeolite of at least one catalytic metal selected from the group consisting of Ru, Rh, Pd, Ag, Os, Ir, Pt, Au, Mo, W, Re, Co, Ni, Zn, Cr, Mn, Ce, Ga and combinations thereof, wherein at least 80% of the catalytic metal is encapsulated in the zeolite, wherein if the zeolite is an aluminosilicate it has a SiO.sub.2:Al.sub.2O.sub.3 molar ratio of greater than 6:1.

Methods of producing rod-shaped mesoporous carbon nitride (MCN) materials are described. The method includes (a) obtaining a template reactant mixture comprising an uncalcined rod-shaped SBA-15 template, a carbon source compound, and a nitrogen source compound; (b) subjecting the template reactant mixture to conditions suitable to form a rod-shaped template carbon nitride composite; (c) heating the rod-shaped template carbon nitride composite to a temperature of at least 500 C. to form a rod-shaped mesoporous carbon nitride material/SB A-15 (MCN-SBA-15) complex; and (d) removing the SBA-15 template from the MCN-SBA-15 complex to produce a rod-shaped mesoporous carbon nitride material.

Disclosed herein is a method of making a polymeric material for selective adsorption of a gas. The method comprises dissolving a monomer comprising a functional group having an affinity for the gas in a solvent with a cross-linker and an initiator; emulsifying the solution in a liquid which is immiscible with the first solvent; and agitating and heating the emulsion to cause polymerization of the monomer into a cross-linked polymer having nanocavities with functional groups covalently-incorporated on walls thereof. Also disclosed are polymeric particles, an apparatus for forming the particles and a method of adsorbing a selected gas.

Disclosed are a hydrocarbon adsorption and desorption complex that reduces emission of hydrocarbon from vehicle exhaust gas and improves hydrothermal stability of a device, and a method for preparing the same. The hydrocarbon adsorption and desorption complex may have improved adsorption ability of the hydrocarbon as metal ions are bound to a gas adsorbing portion containing aluminum, and may have improved hydrothermal stability as a reinforcing portion made of silica is formed on a surface of the gas adsorbing portion.

Disclosed herein is a method of making a polymeric material for selective adsorption of a gas. The method comprises dissolving a monomer comprising a functional group having an affinity for the gas in a solvent with a cross-linker and an initiator; emulsifying the solution in a liquid which is immiscible with the first solvent; and agitating and heating the emulsion to cause polymerization of the monomer into a cross-linked polymer having nanocavities with functional groups covalently-incorporated on walls thereof. Also disclosed are polymeric particles, an apparatus for forming the particles and a method of adsorbing a selected gas.

Aspects of the invention include a method of capturing target compound(s) using a capture device, the method comprising: exposing the device to an environment comprising the target compound(s); wherein the device comprises: a porous artificial melanin material comprising: one or more melanin oligomers and/or polymers; wherein the melanin oligomers and/or polymers comprise a plurality of covalently-bonded melanin base units; wherein the melanin oligomers and/or polymers are arranged to form an internal structure having a plurality of pores; wherein the porous artificial melanin material is characterized by a pore volume per mass of material greater than or equal to 0.1 cm.sup.3/g and wherein at least a portion of said pores have at least one size dimension greater than or equal to 0.5 nm; and capturing the target compound(s) via an interaction between the porous artificial melanin material and the target compound(s).

A system and method for synthesizing a nanoparticle material includes dissolving a metal nitrate in deionized water, adding a hydrogel precursor in the deionized water containing the dissolved metal nitrate to create an aqueous solution, heating the aqueous solution, cooling the aqueous solution to create a solid gel, and calcinating the solid gel to create a metal oxide nanoparticle material. The metal oxide nanoparticle material may include a zinc oxide-based nanoparticle material. The hydrogel precursor may include an agarose gel. The solid gel may be calcinated at approximately 600 C. The solid gel may be calcinated for approximately five hours in the presence of air. The aqueous solution may be heated to a boil. The aqueous solution may be heated at a temperature of 100 C.

A particulate material and a process for the production thereof are provided, which particulate material comprises zeolitic particles having a crystalline structure, which contain as the main component a zeolite material having a zeolitic framework structure formed from Si, O and optionally Al, and/or a zeolite-like material having a zeolitic framework structure which is formed not only from Si, O and optionally Al, wherein the zeolitic particles are in the form of essentially spherical particles with nanometer dimensions.

One aspect is a production process including feeding a feed material composition into a reaction zone at a feeding position, wherein the feed material composition is liquid or gaseous or both; reacting the feed material composition in the reaction zone into a first plurality of particles by a chemical reaction; depositing the first plurality of particles onto a substrate surface of a substrate, thereby obtaining a porous silicon dioxide material, having a pore structure, in the form of up to 20 layers superimposing the substrate surface; at least partially removing the porous silicon dioxide material from the substrate surface; and modifying the pore structure of the porous silicon dioxide material, thereby obtaining the porous silicon dioxide material having a further pore structure.