29 results about "Nanoporous carbon" patented technology

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.

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.

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.

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.

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.

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.

This invention discloses a nanoporous carbon-coated SiC whisker-modified AgCuTi solder, its preparation method, and its application, belonging to the field of brazing technology. The method disclosed in this invention first involves nanoporous carbon coating of SiC whiskers, then combining them with AgCuTi to form a composite solder. The spatial distribution around the SiC whiskers is optimized by the porous carbon coating. The dispersed polymorphic nucleation sites of the porous carbon make multi-point contact with the solder during the brazing reaction, resulting in a discontinuous distribution of the brittle Ti-Cu phase around the whiskers and inhibiting its growth, ultimately refining the brittle phase in the solder layer. Simultaneously, the porous carbon coating prevents excessive reaction between the solder and SiC whiskers at the brazing temperature, reducing the loss of the SiC nanophase by the solder and maximizing the mechanical properties of the nano-reinforcing phase, thus increasing the shear strength of the joint.

The present application relates to waste resource utilization technical field, especially disclose a kind of high azepine content tar waste residue generated in the production of p-phenylenediamine rubber antioxidant key intermediate-RT peiser high-efficiency resource utilization method and its application in the field of environmental remediation.The resource utilization method stably derives and prepares nano-porous carbon with high nitrogen doping amount with high yield to high-efficiency stabilization of azepine waste residue.The present application is simple, efficient, green and environmentally friendly, with no additional pollutant emissions, and the required raw materials can be recycled without wasting resources.The porous carbon prepared has excellent performance in adsorbing and removing various nitrophenol pollutants in water, achieving the goal of "waste treatment".

The invention discloses metal-loaded two-dimensional nano-porous carbon with high catalytic activity as well as a preparation method and application of the metal-loaded two-dimensional nano-porous carbon. By synthesizing a metal-loaded two-dimensional nano porous carbon heterogeneous Fenton catalyst derived from a metal organic framework (MOF), the problems of metal migration and passivation of the heterogeneous catalyst in a Fenton reaction are solved, heterogeneous Fenton catalytic degradation of polysaccharide is realized, the degradation efficiency of the polysaccharide is remarkably improved, and the metal escape rate (lt) is low; according to the present invention, more than 50 times of high catalytic activity polysaccharide cyclic degradation can be achieved by using the catalyst (0.05 [mu] g / mL), and the continuous degradation of the polysaccharide at the room temperature can be achieved by using the catalyst under the oxygen introduction condition;

This invention relates to the field of concrete technology, specifically to an ultra-high performance concrete material with modified coarse aggregate, its preparation method, and its application. The raw materials, by weight, include the following components: 420-480 parts cement, 42-50 parts fly ash, 620-730 parts river sand, 1100-1250 parts modified coarse aggregate, 4-8 parts water-reducing agent, 40-80 parts steel fiber, and 150-220 parts deionized water. This invention involves coating the coarse aggregate with nanoporous carbon, followed by a hydrothermal reaction to facilitate cobalt particle doping, and finally growing carbon nanotubes on its surface. This effectively enhances the skeletal function of the prepared coarse aggregate in concrete, improves the inhibition of concrete shrinkage, and enhances the performance of the prepared concrete.

The invention includes engines adapted for using apparatuses and methods for instantiating chemical reactants in a nanoporous carbon powder, and further includes methods of use for such engines.

The present disclosure provides a nanoporous carbon having BET area in the range of 1200 to 1700 m2 / g, pore volume in the range of 2 to 2.8 cm3 / g, particle size (Dv90) ranging from about 5 μm to about 50 μm, Fe content less than about 20 ppm, and Ash content less than about 0.2% w / w. The present disclosure also provides a method for the production of nanoporous carbon. The nanoporous carbon of the present disclosure is particularly suited for energy storage for example, for the production of battery, capacitor, and the like.

Nanoporous carbon-based scaffolds or structures, and specifically carbon aerogels and their manufacture and use thereof are provided. Embodiments include a silicon-doped anode material for a lithium-ion battery, where the anode material includes beads of a polyimide-derived carbon aerogel. The carbon aerogel may further include silicon particles and accommodates expansion of the silicon particles during lithiation. The anode material provides optimal properties for use within the lithium-ion battery.

This invention relates to the field of waste resource utilization technology, and specifically discloses a highly efficient method for the resource utilization of waste plastic-based protective equipment and its application in environmental remediation. This resource utilization method uses waste plastic-based protective equipment with high polyolefin content as a carbon source, employing a "catalytic carbonization coupled in-situ template" strategy to prepare nanoporous carbon materials in high yield under normal pressure. This invention is simple, efficient, green, and environmentally friendly, with no additional pollutant emissions. The required raw materials are recyclable, preventing resource waste. The prepared porous carbon exhibits excellent adsorption and removal performance for various phenolic drugs and emerging organic pollutants used in disinfection and sterilization in water bodies, achieving "waste-to-waste treatment."

A method for capturing and releasing carbon dioxide (CO2) includes contacting a nanoporous carbon (NPC) material with a CO2-containing gas stream, thereby at least partially absorbing CO2 in the form of molecules on surfaces and pores of the NPC material to form a sample; releasing the CO2 from the sample by thermally heating the sample or exposing the sample to a pressure swing adsorption (PSA) unit; and collecting the CO2. A method of making the NPC material by heating one or more low fixed carbon feeds in the presence of one or more metal salts is also disclosed.