1853 results about "Mesoporous carbon" patented technology

The present application is directed to mesoporous carbon materials comprising bi-functional catalysts. The mesoporous carbon materials find utility in any number of electrical devices, for example, in lithium-air batteries. Methods for making the disclosed carbon materials, and devices comprising the same, are also disclosed.

A method for forming a battery from via thin-film deposition processes is disclosed. A mesoporous carbon material is deposited onto a surface of a conductive substrate that has high surface area, conductive micro-structures formed thereon. A porous, dielectric separator layer is then deposited on the layer of mesoporous carbon material to form a half cell of an energy storage device. The mesoporous carbon material is made up of CVD-deposited carbon fullerene “onions” and carbon nano-tubes, and has a high porosity capable of retaining lithium ions in concentrations useful for storing significant quantities of electrical energy. Embodiments of the invention further provide for the formation of an electrode having a high surface area conductive region that is useful in a battery structure. In one configuration the electrode has a high surface area conductive region comprising a porous dendritic structure that can be formed by electroplating, physical vapor deposition, chemical vapor deposition, thermal spraying, and/or electroless plating techniques.

A filter and filter material for providing or treating potable water is provided. The filter includes a housing having an inlet and an outlet, a filter material disposed within the housing, the filter material formed at least in part from a mixture of a plurality of mesoporous and microporous activated carbon particles. Preferably, at least some of the mesoporous activated carbon filter particles are coated with a cationic polymer, and even more preferably, at least some of the particles are coated with a cationic polymer and silver or a silver containing material. Kits comprising filters and information relating to the reduction, killing or removal of bacteria, viruses, microbials, and TTHM are also provided.

The present invention discloses a novel electrode-catalyst for direct methanol fuel cell prepared by introducing a carbon precursor into pores of a wormhole-like molecular sieve template, carbonizing the carbon precursor, removing the molecular sieve template to obtain a wormhole-like mesoporous carbon having a high specific surface of 800-1000 m²/g and a pore size of 4-5 nm, and depositing catalyst metal such as Pt—Ru on the mesoporous carbon.

The present invention belongs to the field of material preparing technology. By means of sol-gel technology, organic high molecule and silicon source are led into a surfactant self-assembling reaction system so as to prepare high ordered mesoporous high molecule/silica and carbon/silica composite material and ordered mesoporous carbon material through organic-organic competition, inorganic-inorganic competition, organic-inorganic competition, cross-linking polymerization coordinate assembling and solvent volatizing self assembling. The prepared mesoporous carbon material has high order property, great specific surface area, great caliber and great porosity, as well as excellent electrochemical properties as super capacitor and cell material. It has also wide application foreground in catalysis, adsorption, biomolecule separation, and other fields.

The invention discloses a controllable synthesizing method of an N-doped graphitized carbon ball with hollow structures. The method comprises the following steps: (1) dissolving silicon source, soluble metal salt and a catalyst to the solvent according to the molar ratio, transferring the solvent to the thermal water kettle to conduct hydro-thermal synthesis after being stirred until being thoroughly dissolved, and cleaning, filtering and drying the sediment to obtain a primary commodity; (2) reducing the primary commodity at high temperature under the protection of gas in a high-temperature reaction furnace; and (3) soaking the product obtained by high-temperature reducing in acidic solution, and obtaining the graphitized carbon ball nitrogen doping with the hollow structure after cleaning, filtering and drying. The graphitized carbon ball with the hollow structures provided by the invention has the advantages that the carbon sphere has a uniform appearance, the carbon shell has millipore structures, a mesoporous carbon support structure is formed inside the carbon sphere and a better graphitize degree is provided, and can be used in the field of high-efficient catalyzing and transforming, energy storage and transforming, medicine releasing, substance adsorptive separation and the like. The non-template hydrothermal synthesis technique provided by the invention is simple and controllable, and can be used in large scale production.

The invention relates to a novel metal catalyst loaded by mesoporous carbon and a preparation method thereof. The metal catalyst is composed of 0.01-90 wt% of metal grains and 10-99.99 wt% of mesoporous carbon carrier, wherein the mesoporous carbon carrier is made of a heteroatom-doped mesoporous carbon material; the heteroatom-doped mesoporous carbon material is prepared by the following steps of: taking ionic liquid containing heteroatoms as a monomer and mixing the ionic liquid with a template agent at a room temperature; and then calcining the mixture at a temperature in a range of 400-1000 DEG C for 1-6 hours and cooling the mixture to the room temperature; and finally, removing the template agent to obtain the heteroatom-doped mesoporous carbon material. The average grain diameter of the metal grains is 1-100 nm and the mass percentage of the heteroatoms in the mesoporous carbon material is 0.01-80 wt%. The catalyst provided by the invention is good for enhancing the catalytic activity of the catalyst by adjusting the valence state of nano metal through doping the heteroatoms including nitrogen, sulfur, phosphorus, boron, fluorine and the like, and depositing and dispersing on the metal on the surface of the carrier. Furthermore, the catalyst is simple in preparation and is stable for water, air and heat.

The invention relates to a lithium sulfur battery anode material and a preparation method thereof. In the anode material, nano sulfur particles are uniformly filled in hollow carbon nano-tubes of a nano mesoporous carbon material, so that sulfur is tightly contacted with carbon. The thickness of each carbon tube in the nano mesoporous carbon material is 5 to 200nm, the pore diameter is 2 to 100nm and the granularity of the sulfur nano particles is 2 to 100nm. The capacity of the prepared lithium sulfur battery anode material is more than 1,800mAh/g, and the capacity is kept over 80 percent after 500 cycles.

The invention discloses a preparation method for an ordered mesoporous carbon/tungsten carbide composite material and a supported catalyst thereof. In the method, an organic matter and a tungsten salt are separately used as a carbon source and a tungsten source, and the carbon source and the tungsten source are mixed with a surfactant; and a precursor of the ordered mesoporous carbon/tungsten carbide is synthesized by a solvent-evaporation induced self-assembly method, and then the precursor is subject to high-temperature treatment in the inert atmosphere to form the ordered mesoporous carbon/tungsten carbide composite material. The ordered mesoporous carbon/tungsten carbide composite material prepared by the method has the characteristics of high degree of order, narrow aperture distribution, large specific surface area (greater than 500 m<2>/g) and the like. The invention further comprises a supported catalyst prepared by supporting active components on the ordered mesoporous carbon /tungsten carbide composite material which is prepared by the method; and because of the synergistic effect and the structure effect of the ordered mesoporous carbon/tungsten carbide composite material, the catalyst has higher methanol electro-oxidation catalytic activity than a commercial carbon platinum-ruthenium catalyst.

Provided are products, systems, and methods relating to the removal of particles from fluid samples using mesoporous carbon materials.

The invention discloses a preparation method of a positive material for a lithium-sulfur battery. The preparation method comprises the steps of: (1) mixing elemental sulfur and an organic solvent uniformly so that the elemental sulfur is completely dissolved to obtain a sulfur-organic solution, wherein the organic solvent is selected from more than one of carbon disulfide, toluene, cyclohexane and normal octane; (2) adding a carbon material into the sulfur-organic solution, stirring uniformly, and removing the solvent to obtain a sulfur/carbon composite material, wherein the carbon material is selected from any more than one of active carbon, mesoporous carbon, carbon black, carbon nano tube and graphene or any more than one of active carbon, mesoporous carbon, carbon black, carbon nano tube and graphene which are acidified. According to the sulfur/carbon composite material, the carbon material with better electrical conductivity is coated on sulfur particles; compared with the pure elemental sulfur positive material, the first-time discharge specific capacity and the cycling performance of the sulfur/carbon composite material are effectively improved; and the preparation process is simple, the time is short, the energy consumption is low and the large-scale production is easy.

The invention provides ordered mesoporous carbon-sulphur nano composite positive pole material and preparation method thereof, which relates to nano composite material, especially ordered mesoporous carbon-sulphur composite positive pole suitable for lithium-sulphur secondary battery and preparation method thereof. The invention provides an ordered mesoporous carbon-sulphur nano composite positive pole material with excellent electrochemical activity and preparation method thereof. The material comprises ordered mesoporous carbon and sublimed sulfur, wherein, the content of component sulphur is 20-80 mass percent of ordered mesoporous carbon-sulphur nano composite positive pole material. The method provided by the invention includes the steps: synthesizing ordered mesoporous carbon; mixing prepared ordered mesoporous carbon and sublimed sulfur according to stoichiometric ratio, putting them into an air-tight container, heating for melting and compounding sulphur, and acquiring ordered mesoporous carbon-sulphur nano compound positive pole material.

The invention provides a spherical mesoporous C3N4 material with a hollow cavity nanostructure and a preparation method thereof. The preparation method comprises the following steps: modifying a nano solid SiO2 spherule to get a solid SiO2 material coated with mesoporous SiO2 on the outer layer, further adding alkali, selectively etching off the inner-layer solid SiO2 to get nano hollow mesoporous SiO2, fully impregnating the nano hollow mesoporous SiO2 in a water solution of a nitrogen-containing precursor, performing centrifugal drying, performing high-temperature roasting in protective gas, and then using hydrofluoric acid to dissolve the SiO2 to get the spherical hollow mesoporous nano C3N4. The prepared product has the specific surface area of 300-800m<2>/g and a cavity capable of loading other materials, is easy to perform mass transfer and can be further widely applied.

Macroporous ordered nano mescoporous carbon material with spatial symmetry of Ia3d is prepared through the process of: mixing carbon source and solvent homogeneously with SiO2 mesoporous material with 3D connection and double continuous pore canal as template agent; heat treatment to evaporate solvent; high temperature roasting under protective nitrogen to carbonate carbon source completely; eliminating SiO2 template agent, filtering, washing and drying. The material has two-way connecting and 3D ordered pore and canal structure, large pore diameter, great specific surface area and great pore volume, and is powder, sheet or film.

A filter and filter material for providing or treating potable water is provided. The filter includes a housing having an inlet and an outlet, a filter material disposed within the housing, the filter material formed at least in part from a mixture of a plurality of mesoporous and microporous activated carbon particles. Preferably, at least some of the mesoporous activated carbon filter particles are coated with a cationic polymer, and even more preferably, at least some of the particles are coated with a cationic polymer and silver or a silver containing material. Kits comprising filters and information relating to the reduction, killing or removal of bacteria, viruses, microbials, and TTHM are also provided.

The invention discloses a hydrogenation catalyst and a preparation method of 1,4-cyclohexanedimethanol. The hydrogenation catalyst comprises a carrier and active components, wherein the carrier is mesoporous carbon, the active components are Ru and Sn, and the load capacity of the active components saccounts for 5%-15% of the hydrogenation catalyst in mass. The preparation method of the 1,4-cyclohexanedimethanol adopts the catalyst of the invention, and under the condition of a solvent and hydrogenation, the target product is produced with high selectivity. The catalyst and the method of the invention keep higher conversion rate and yield in reaction, simultaneously can maintain long service life of the catalyst, use the cheap mesoporous carbon as the carrier to reduce the cost of the catalyst, improve the reutilization rate of noble metal, and reduce consumption of the catalyst.

Provided are a mesoporous carbon and a method of preparing the same, where the mesoporous carbon is prepared using phenanthrene as a carbon source and a mesoporous silica as a template. The mesoporous carbon has a significantly low plane resistance, which can be obtained without sacrificing other physical properties, and thus obtains a high conductivity and effectively transfers electrical energy. Accordingly, a fuel cell electrode or a fuel cell which is produced using the mesoporous carbon as a conductive material has high efficiency. Furthermore, the mesoporous carbon may be used in various electrochemical devices as a conductive material.

The invention relates to a carbon-sulphur composite used for a cathode material of a lithium sulphur battery as well as a preparation method and application thereof. The carbon-sulphur composite comprises a carbon material and elemental sulphur, wherein the carbon material is formed by doping mesoporous carbon with the aperture of 2-5nm and electroconductive carbon with the aperture of 30-70nm, and the electroconductive carbon with the aperture of 30-70nm contains micropores with the aperture of 0.5-1.7nm; and the elemental sulphur accounts for 10-90wt% of the total quantity of the composite. Abundant micropores guarantee that the carbon material has larger specific surface, adsorption capacity to polysulphide is stronger, and dissolution of the polysulphide can be effectively limited, so that stability of a sulphur electrode is improved. Meso pores in porous distribution can load more sulphur active substances, electrochemical capacity of a composite material is improved, and diffusion and transmission of lithium ions and electrolyte solution can be facilitated, so that reduction polarization of the elemental sulphur is reduced and discharge plateau of the elemental sulphur is improved.