The invention discloses a phosphorus-doped tubular carbon nitride micro-nano material and application thereof in waste gas treatment. Melamine is partially hydrolyzed into cyanuric acid through a phosphorous acid-assisted hydrothermal method to form a melamine-cyanuric acid super molecular precursor; the center of the precursor starts to be pyrolyzed under heating calcination, and thus phosphorus-doped tubular carbon nitride is obtained; the phosphorus-doped tubular carbon nitride and sodium borohydride are mixed and subjected to low-temperature calcination in an inert gas atmosphere, and defect-modified phosphorus-doped tubular carbon nitride is obtained. The defect-modified phosphorus-doped tubular carbon nitride micro-nano material has a good photocatalytic effect on catalytic degradation of waste gas; besides, the production raw materials are abundant and easy to obtain, and the phosphorus-doped tubular carbon nitride micro-nano material is good in stability and recyclable and has application prospects in waste gas treatment.

This invention relates to a catalyst for use in the preparation of acetic acid through a methanol carbonylation reaction using carbon monoxide, and particularly to a heterogeneous catalyst represented by Rh/C.sub.3N.sub.4 configured such that a complex of a rhodium compound and 3-benzoylpyridine is immobilized on a carbon nitride support.

The present invention addresses to a hydrothermal liquefaction process capable of generating a liquid stream, rich in renewable molecules, with lower oxygen content, lower percentage of water and lower acidity compared to other products of thermochemical processes of biomass conversion. In order to effectively carry out this process, a catalyst was developed, obtained from the calcination of castor bean hull, to be used in the field of biofuels in order to provide an environmentally friendly alternative for the production of fuels.

Carbon-based single metal atom or bimetallic, trimetallic, or multimetallic alloy transition metal-containing catalysts derived from exoelectrogen bacteria and their methods of making and using thereof are described. The method comprising the steps of: (a) preparing a solution medium comprising at least an electron donor and an electron acceptor comprised of one or more salts of a transition metal; (b) providing exoelectrogen bacterial cells and mixing the exoelectrogen bacterial cells into the solution medium of step (a); (c) incubating the solution medium of step (b); (d) isolating the exoelectrogen bacterial cells from the incubated solution medium of step (c); and (e) pyrolyzing the exoelectrogen bacterial cells resulting in formation of the catalyst. The electron donor can be formate, acetate, or hydrogen.

Antimicrobial metallic foams useful in filters, methods of making and using the same, and antimicrobial filters, systems, and articles are described.

A method of producing bifunctional catalyst systems that include a carbon-coated metal catalyst may comprise: coating a metal catalyst particle with a carbon-containing small molecule to produce a coated metal catalyst particle; carbonizing the carbon-containing small molecule on the coated metal catalyst particle to produce a carbon-coated metal catalyst particle; and mixing the carbon-coated metal catalyst particle with an acid catalyst particle to produce an acid/metal bifunctional catalyst system. Further, a method of producing bifunctional catalyst systems that include a carbon-coated acid catalyst may be similarly performed by coating a metal catalyst particle with a carbon-containing small molecule to produce a coated metal catalyst particle; carbonizing the carbon-containing small molecule on the coated metal catalyst particle to produce a carbon-coated metal catalyst particle; and mixing the carbon-coated metal catalyst particle with an acid catalyst particle to produce an acid/metal bifunctional catalyst system.

Disclosed are a catalyst for carbonylation of dimethyl ether that has high catalyst activity and can be regenerated using a fluidized bed reactor, and a method for preparing the same. The catalyst for carbonylation of dimethyl ether includes a support having a first density; and ferrierite zeolite catalyst particles bound to a surface of the support via a polymer binder and having a second density smaller than the first density.

A carbon-coated nickel oxide nanocomposite material, its preparation, and application thereof are provided. The nanocomposite material contains carbon-coated nickel oxide nanoparticles having a core-shell structure including an outer shell that is a graphitized carbon film optionally doped with nitrogen and an inner core comprising nickel oxide nanoparticle(s). The nanocomposite material has a carbon content of from greater than 0 wt % to not greater than about 5 wt %, based on the weight of the nanocomposite material.

A carbon-based solid acid catalyst, a preparation method of the catalyst, and a method to use the catalyst for hydrothermal conversion of biomass are provided. The preparation method of the carbon-based solid acid catalyst includes the following steps: S1. mixing pectin with water, adding concentrated sulfuric acid for activation, and adding a resulting mixture to an ionic resin with an aromatic ring matrix; S2. drying a material obtained in S1, crushing a dried material into a powder, and subjecting the powder to pyrolysis in a dry inert gas; S3. subjecting a solid obtained after the pyrolysis to sulfonation with concentrated sulfuric acid; S4. diluting a material obtained in S3 with water, filtering a resulting mixture, and washing a resulting filter residue with water until no sulfate ions are detected in washing water; S5. drying the filter residue.

The present invention relates to methods for producing coated metal bodies by applying a metal powder composition to a metal body, such that a coated metal body is obtained, the coating of which contains one or more wax components; heating the coated metal body to the melting temperature of at least one of the wax components and subsequent cooling to room temperature, such that a coated metal body is obtained; and thermally treating the coated metal body in order to achieve alloy formation between metal portions of metal body and metal powder composition, wherein the metal body comprises nickel, cobalt, copper and/or iron and the metal powder composition comprises a metal component in powder form, which contains aluminium, silicon or magnesium in elemental or alloyed form. By melting and cooling the wax, the method makes metal bodies having a more uniform alloy coverage accessible. The invention furthermore relates to methods wherein the metal body is subsequently treated with a basic solution. The present invention additionally comprises the metal bodies obtainable by the method according to the invention, which find application as load-bearing and structural components, for example, and in catalyst converter technology.