61 results about "Nanoporous carbon" patented technology

The invention belongs to the technical field of ethanol recovery, and relates to a preparation method of a tubular ceramic carrier-based C-ZIF-67 derived nano-porous carbon doped PDMS mixed matrix membrane and an application of the membrane in recovery of ethanol by pervaporation of a low-concentration ethanol aqueous solution. Comprising the following steps: synthesizing a ZIF-67 crystal, and carbonizing the ZIF-67 crystal to obtain C-ZIF-67 filler particles; the ZIF-67-derived nano-porous carbon particles are prepared through a high-temperature calcination method, the particles are fully carbonized at a certain calcination temperature, disappearance of characteristic groups after carbonization can reduce the influence of surface electrical properties of the particles, and the size shrinkage of the particles is reduced, so that the dispersity of the particles in a matrix membrane is improved; meanwhile, the MOF skeleton structure is still reserved after carbonization, the pore diameter is increased, the carbon material also has strong hydrophobicity, the hydrophobic large-pore-diameter separation pore channels are more beneficial to passing of ethanol molecules and promotion of the separation effect, the separation factor and the total flux are almost kept unchanged after long-time operation and use, and excellent performance is shown; good application prospects are realized.

The invention relates to a dephosphorization material, a preparation method thereof and a dephosphorization method, belongs to the field of water treatment, and solves at least one of the problems of contradiction between adsorption capacity and structural stability, fast capacity fading, short service life, difficult recovery, higher cost and the like of the existing lanthanum-based dephosphorization material. The phosphorus removal material is a nano-porous carbon-supported lanthanum composite material, and comprises an amorphous nano-porous carbon matrix, an amorphous nano-porous carbon carrier, an amorphous nano-porous carbon carrier, and an amorphous nano-porous carbon carrier, and an active component embedded in situ in the nanoporous carbon matrix; wherein the active component comprises lanthanum oxide and / or lanthanum hydroxide. According to the invention, the adsorption capacity is high, the structure is stable, the attenuation of the adsorption capacity is delayed, the service life is prolonged, the cost is reduced, and the adsorbent can be recycled.

A method for harvesting water includes contacting a nanoporous carbon (NPC) material with a stream of humid atmospheric air, thereby at least partially absorbing water in the form of molecules on surfaces and pores of the NPC material to form a sample, releasing the water from the sample by thermally heating the sample or exposing the sample to ultraviolet-visible (UV-Vis) radiation; and collecting the water. A method of making the NPC material by calcining one or more petroleum feedstocks is also disclosed.

The present invention refers to a process for preparing a graphitized nanoporous carbon, the so-obtained carbon particles_and the use thereof as highly stable support for electrochemical processes.

The invention discloses petroleum coke, a non-graphite carbon material, a negative electrode material and a preparation method thereof. The method comprises the following steps: performing first solid removal on a first heavy oil raw material to obtain first purified heavy oil; performing second solid removal on the second heavy oil raw material to obtain second purified heavy oil; mixing the second purified heavy oil with nano-porous carbon to obtain third purified heavy oil and heavy oil containing the nano-porous carbon; carrying out solid-liquid separation on the heavy oil containing the nano-porous carbon to obtain a non-graphite carbon material precursor and fourth purified heavy oil; mixing the third purified heavy oil, the fourth purified heavy oil and the first purified heavy oil to obtain heavy mixed oil; carrying out distillation, pyrolysis and modification treatment on the heavy mixed oil to obtain petroleum coke; carbonizing the non-graphite carbon material precursor to obtain a non-graphite carbon material; the negative electrode material is prepared from petroleum coke and a non-graphite carbon material. The petroleum coke and the non-graphite carbon material with relatively high quality are prepared, and the electrochemical performance of the negative electrode material can be improved.

The present application relates to a kind of preparation method of nitrogen-oxygen co-doped nanoporous carbon material and its application, with the following steps: resorcinol, polyaspartic acid potassium, polyvinyl alcohol, 4-dimethylaminopyridine are dissolved in distilled water stirring 10~60 minutes, then add sepiolite powder, ultrasonic oscillation at room temperature 30~60 minutes, finally add formaldehyde aqueous solution, seal, continue ultrasonic oscillation 1~3 hours, obtain gel product;The gel product obtained is dried to obtain intermediate;The intermediate obtained is carbonized to obtain black product;The black product obtained is pickled and washed with water, dried to obtain nitrogen-oxygen co-doped nanoporous carbon material.The porous carbon material obtained by the present application has large specific surface area and strong adsorption capacity, and the preparation method has high reaction yield.

The present invention belongs to the technical field of ethanol recovery and relates to a preparation method of a C-ZIF-67-derived nanoporous carbon-doped PDMS mixed matrix membrane based on a tubular ceramic carrier and its application in the pervaporation recovery of ethanol from a low-concentration ethanol aqueous solution; the preparation method comprises synthesizing ZIF-67 crystals and carbonizing the ZIF-67 crystals to obtain C-ZIF-67 filler particles; the present invention prepares ZIF-67-derived nanoporous carbon particles by a high-temperature calcination method, fully carbonizes the particles at a certain calcination temperature, and the disappearance of characteristic groups after carbonization can reduce the influence of the surface electrical properties of the particles, and the particle size shrinkage is reduced, which helps to improve the dispersion of the particles in the matrix membrane; at the same time, the MOF skeleton structure is retained after carbonization, and the pore size is enlarged. The carbon material also has strong hydrophobicity. These hydrophobic large-pore separation channels are more conducive to the passage of ethanol molecules, thereby promoting the improvement of the separation effect. Moreover, the separation factor and total flux remain almost unchanged after long-term operation, showing excellent performance and having good application prospects.

Supported catalyst systems comprise a bimodal nanoporous support, the support comprising: a plurality of porous bodies connected by interconnecting structures, wherein the porous bodies have primary pores throughout their structures, the primary pores defined by a first average pore diameter; and wherein the spaces between the interconnected porous bodies define secondary pores having a second average pore diameter; and catalyst deposits (e.g., comprising Pt) within the primary pores. The first average pore diameter is less than or equal to 20 nm, and the second average pore diameter is greater than 20 nm. The supported catalyst system further comprises an ionomer deposited onto the supported catalyst system, wherein the ionomer is localized to the secondary pores and the exterior surfaces of the porous bodies and interconnecting structures but does not enter the primary pores or contact the catalyst deposits inside the primary pores.

Nanoporous carbon-based scaffolds or structures, and specifically carbon aerogels and their manufacture and use thereof. Embodiments include a cathode material within a lithium-air battery, where the cathode is formed of a binder-free, monolithic, polyimide-derived carbon aerogel. The carbon aerogel includes pores that improve the oxygen transport properties of electrolyte solution and improve the formation of lithium peroxide along the surface and / or within the pores of the carbon aerogel. The cathode and underlying carbon aerogel provide optimal properties for use within the lithium-air battery.

The present application relates to the technical field of environment-friendly glass wool, and proposes a pink environment-friendly glass wool, which comprises the following components in parts by weight: glass powder 50-60 parts, quartz sand 30-35 parts, dolomite 5-8 parts, borax 3-5 parts, soda ash 3-5 parts, nano-porous carbon 3-8 parts, silica aerogel powder 5-10 parts, formaldehyde-free adhesive 15-20 parts, and dyeing agent 0.02-0.05 parts. The above technical solution solves the problems of poor durability and environmental unfriendliness of the heat preservation and insulation performance of the glass wool product in the prior art.

This disclosure relates to an easy method of purifying drinking water using a small sachet packet or a filter unit which could be attached to a tap, consisting of powdered or granular, hydroxy and phosphate functionalized activated nanoporous carbon derived from waste coir dust. The suggested vapour treatment method for coconut coir dust leads to functionalization of coir with hydroxyl and phosphate groups and the inert environment pyrolysis leads to formation of a nanoporous carbon network. The activated nanoporous carbon can be used for removing hardness, fluoride and heavy metals present in drinking water. The material is incorporated into a membrane filter (a sachet packet similar to a tea bag) or packed into a column which could be attached to a domestic water tap.

This invention discloses a Pt / O-NCP catalyst and its preparation method. It utilizes self-developed nanoporous carbon (NCP) as a support, which is modified to change the internal pores from a hydrophobic to a hydrophilic state. A special preparation method is then used to obtain the noble metal catalyst Pt / O-NCP. During catalyst loading, most Pt nanoparticles are located within the mesopores of the support, maximizing the direct contact between the polymer and Pt (sulfonic acid poisoning). This solves the problems in existing catalysts where Pt nanoparticles are prone to dissolution and carbon corrosion under voltage fluctuations, leading to Pt growth and aggregation, thus avoiding the reduction in catalytic performance caused by a decrease in the active surface area of ​​the catalyst. Furthermore, this catalyst can also address the significant decrease in overpotential of ordinary carbon support materials under low humidity, resolving the typical performance degradation of PEMFCs under low humidity conditions.

This invention discloses a method for improving the stability of dsRNA by loading double-stranded RNA onto nanoporous carbon, belonging to the interdisciplinary field of agricultural biotechnology and nanomaterials. This invention employs a specific ceramic template method to prepare nanoporous carbon with a regular mesoporous structure and a high degree of graphitization. Through mechanisms such as mesoporous confinement effect, full-band UV shielding, and enhanced leaf adhesion, the stability of dsRNA under environmental stresses such as UV irradiation, nuclease degradation, and rain washout is significantly improved. This composite carrier exhibits high loading efficiency and is environmentally friendly, suitable for RNA interference control of various pests, and provides key technical support for the development of efficient and long-lasting nanoRNA pesticides.

Nanoporous carbon-based scaffolds or structures, and in particular carbon aerogels, and their manufacture and use are provided. Embodiments include a silicon-doped anode material for a lithium-ion battery, wherein the anode material comprises polyimide-derived carbon aerogel beads. The carbon aerogel contains silicon particles and accommodates the expansion of the silicon particles during lithiation. The anode material provides optimal properties for use in a lithium-ion battery.

The invention includes apparatus and methods for instantiating materials, such as gases and hydrogen, in a nanoporous carbon powder.

The present invention belongs to the technical field of microwave absorbing materials, and particularly relates to a nano-porous carbon / cobalt / cobalt oxide composite material, a preparation method thereof and an application thereof, which include the following steps: S1. Dispersing nano-porous carbon powder, hexamethylenetetramine, trisodium citrate and soluble cobalt salt in water to form a dispersion liquid, and then carrying out a solvothermal reaction at 85-95 °C. After washing and drying, an NCP / Co precursor is obtained; S2. Pyrolyzing the NCP@Co precursor prepared in S1 at 700-900 °C to obtain a nano-porous carbon / cobalt / cobalt oxide composite material; The present invention utilizes the dielectric loss of the nano-porous carbon matrix and the magnetic loss of cobalt / cobalt oxide nanoparticles, and combines multiple loss mechanisms. The nano-porous carbon / cobalt / cobalt oxide nano-composite microwave absorbing material exhibits excellent performance in terms of absorption bandwidth and absorption intensity.

The present application belongs to the technical field of valuable metal recovery from waste lithium batteries, and particularly relates to a kind of nano-porous carbon material and application and a method for recovering valuable metal in lithium battery by using the same.The present application provides a kind of nano-porous carbon material with metal organic framework as precursor, which has stronger reducibility, and after being mixed with retired battery powder, can reduce the activation energy thereof, reduce the temperature of reduction reaction, has obvious promoting effect on carbon thermal reduction reaction, and can faster reduce the metal in retired battery powder into elemental Ni and Co, MnO, Li2O and Li2CO3.Moreover, the nano-porous carbon material provided by the present application can realize high leaching rate of Li and Mn, while keeping the leaching rate of Co and Ni at a low level, so as to realize selective leaching and efficient separation and recovery of Li, Mn, Ni and Co.

The invention provides a preparation method of a nano porous carbon loaded Fe-O single cluster electrocatalyst, which comprises the following steps: mixing and stirring catechol, formaldehyde, sodium carbonate and water to a clear solution state, and aging the obtained solution in a drying oven until the solution forms solid gel; the solid gel and a polyether solution are mixed, soaked and stirred, and the soaked gel is placed in a drying oven to be dried; roasting the dried gel in a nitrogen atmosphere, and then roasting in a carbon dioxide atmosphere; carrying out ball milling on the calcined sample to obtain nano-porous carbon powder; ca-L-Fe28 is dissolved in water, then a proper amount of calcined sample powder is added into the water, then the solution is centrifuged and dried, and the composite nano-porous carbon loaded Fe-O single cluster electrocatalyst is obtained. The prepared catalyst has a good dispersion effect and good oxidation-reduction performance, urea can be synthesized under low-energy-consumption and mild conditions, and the synthesis method of the electrocatalyst is simple in process and suitable for large-scale production.

The invention relates to a method for producing graphitized nanoporous carbon, to the carbon particles thus obtained, and to the use thereof as highly stable supports for electrochemical processes.

The invention belongs to the technical field of porous carbon materials, and discloses a nano-porous carbon sphere as well as a preparation method and application thereof. The average particle size of the nano-porous carbon spheres is 20-800nm, the specific surface area is 50-5000m < 2 > / g, the pore volume is 0.2-2.0 cm < 3 > / g, and the graphitization degree ID / IG is 0.5-1.8. The method comprises the following steps: taking a halogenated polyolefin polymer as a raw material, preparing polymer nano-spheres by using a precipitation method, carbonizing the polymer nano-spheres at a low temperature through a hydrothermal method, and further carbonizing the polymer nano-spheres in an inert gas atmosphere. The nano-porous carbon spheres prepared by the method have good sphericity and a microporous / mesoporous structure; the method is simple in process, convenient to operate and low in equipment requirement, can be used for large-scale preparation, and has the application prospect of industrial production.

This invention pertains to recycled marine plastic fiber materials, specifically relating to a fully drawn filament with temperature regulation and radiation protection functions, and its preparation method. The invention discloses a fully drawn filament filled with nanoporous carbon fiber aerogel, using recycled marine plastic as raw material, undergoing three-channel hot stretching, magnetic field-assisted freeze-drying, and laser-directed localized heating carbonization, and possessing both heat insulation and radiation protection functions. This fully drawn filament comprises a double-layer carbon fiber aerogel structure with a square cross-section arranged from the inside out, and a shell of recycled marine polypropylene fiber. The preparation method is a melt-hot stretching method, with a magnetic field incorporated during the stretching process, followed by freeze-drying, laser-directed heating carbonization, and collection to prepare the fully drawn filament. The product exhibits good and uniform heat insulation and radiation protection performance, and the production cost is within a controllable range.

According to the nano-porous carbon coated glass powder, the preparation method thereof and the solar cell silver paste, the nano-porous carbon coated glass powder is prepared with high dispersion uniformity and ideal yield, in the preparation process, it is guaranteed that the glass powder in a system meets the high micron-scale requirement, and the glass powder can be used for preparing the nano-porous carbon coated glass powder. Meanwhile, the nano-porous carbon is adsorbed on the surface of the glass powder, so that agglomeration of glass powder particles is avoided. The nano-porous carbon coated glass powder prepared by the method disclosed by the invention has better particle size distribution, is easy to prepare and is not easy to agglomerate, so that the nano-porous carbon coated glass powder is easier to penetrate through a narrow-line-width screen printing plate in a silk-screen printing process, and the narrow-line-width printing effect is further improved; meanwhile, in the high-temperature sintering process, the nano-porous carbon can form good ohmic contact on an interface, so that the conversion efficiency of the solar cell is improved.

Described herein is a preparation method of C-ZIF-67-derived nano-porous carbon doped PDMS mixed matrix membrane based on a tubular ceramic carrier and its application in pervaporation of low-concentration ethanol aqueous solution to recover ethanol by synthesizing ZIF-67 crystals and carbonizing the ZIF-67 crystal to obtain C-ZIF-67 filler particles. According to the present application, the nano-porous carbon particles derived from ZIF-67 are prepared by a high-temperature calcination method, and are fully carbonized at a certain calcination temperature, so that the disappearance of characteristic groups after carbonization can reduce the influence of surface electrical properties, and the particle size is reduced. At the same time, the MOF skeleton structure is still retained after carbonization, the pore size is enlarged, and the carbon material also has strong hydrophobicity.

The invention relates to an energy-releasing composite material comprising at least one nanoporous material and at least one inorganic oxidant, characterised in that said nanoporous material is a nanoporous carbon material.

The present application relates to a kind of in-situ autogenous carbon nanotube reinforced nanopore carbon aerogel composite material and its preparation method, belong to the field of thermal protection materials, at least one of the problems in the prior art carbon aerogel material, such as low mechanical property, high temperature stability, in the promotion of mechanical property, cause its basic performance (such as heat insulation performance, low density, etc.) decline, preparation process is complex and cost is higher and so on is solved.The preparation method comprises: the solution of linear phenol formaldehyde resin is mixed with curing agent, to obtain the phenol formaldehyde resin solution after curing;Add metal cobalt powder, magnesium chloride and zinc acetate as catalyst;By heating and stirring, to obtain resin liquid;Resin liquid is sequentially cured, dried and carbonized.The present application realizes the promotion of carbon aerogel material mechanical property, has excellent heat insulation performance and high temperature stability, guarantees low density and light weight.

The invention relates to the technical field of sensing of aquatic water ion detection, and discloses a solid-state contact layer of an all-solid-state ion selective electrode, FeCoNi-coated ZIF-8 doped with three transition metals of iron, cobalt and nickel is synthesized through a one-pot method, nano porous carbon based on ZIF-8 is generated through pyrolysis, and finally a transition metal doped ZIF-8-derived carbon nanomaterial is obtained. And mixing the carbon nanomaterial with a hydrophobic material and an ionic liquid to construct an ion-electron transduction layer of the all-solid-state ion selective electrode with excellent hydrophobic performance. The solid-state contact layer prepared by the invention not only can effectively inhibit the formation of a water layer between an ion sensitive film and a conductive substrate and solve the problem of potential drift of an ion selective electrode in measurement, but also has the advantages that the electric double-layer capacitance effect of the carbon nanomaterial and the synergistic pseudocapacitance effect among various transition metals act together; and the ion-electron transduction capability of the electrode is improved.

The invention discloses a preparation method of a silicon carbide ceramic membrane, and belongs to the technical field of ceramic membrane preparation. The method comprises the following steps: firstly, loading organic sol on the surface of a porous silicon carbide support body, and constructing a nano-porous carbon prefabricated layer through gelation and carbonization treatment; then introducing a silicon source, heating in a vacuum or inert atmosphere for reactive sintering, infiltrating liquid silicon into the carbon skeleton to generate silicon carbide in situ, and filling pores with excessive silicon to form a compact silicon carbide / silicon composite layer; and finally, removing a silicon phase in the composite layer through selective chemical or electrochemical etching to obtain the nano-aperture silicon carbide ceramic membrane. According to the invention, the problems of high sintering temperature, difficult pore size control and easy cracking in the traditional silicon carbide film preparation are solved by utilizing a sacrifice template strategy. The prepared membrane layer has the characteristics of narrow pore size distribution, large permeation flux, good chemical stability and the like, and is suitable for precise filtration and separation.

A sorbent is made by pyrolyzing a carbon source (preferably coal) at a temperature of at least 500° C. to form pyrolyzed porous carbon that is reacted with acid to form carboxylic acid (—COOH) moieties and adding a metal ion to bind the metal at the carboxylate sites in the pyrolyzed porous carbon. A sorbent is described that comprises a pyrolyzed porous carbon support; magnesium and carboxylate moieties disposed in the pyrolyzed porous carbon support; and possessing a CO2 adsorption isotherm between 0.0 and 0.05 bar CO2 having a slope that is at least 20% greater than between 0.40 and 0.45. CO2 can be selectively removed via pressure and / or temperature swing desorption by contacting a CO2-comprising fluid with the sorbent.

A system and method of making a sulfur-carbon composite are disclosed. A nanoporous carbon powder is placed in a container and a sulfur source is stored in a staging tube gaseously coupled to the container, allowing delivery of the sulfur source into the container without introducing any gases. The carbon is desorbed by cyclically heating, evacuating, and backfilling with an inert gas until a predetermined desorption temperature is reached, thereby forming a desorbed carbon powder. After cooling, the sulfur source is transferred onto the desorbed powder, the container is evacuated and sealed, and a thermal gradient is applied. Excess sulfur may be condensed away from the composite. A system includes a container having a carbon powder and a staging tube coupled to the container through an O-ring union tee vacuum fitting. A sulfur-carbon composite includes nano-scale porous carbon having nanometer-scale sulfur dispersed in the pores and on a surface.