295 results about "High surface area" patented technology

Iridium-based catalysts and methods of making the catalysts are described. The catalyst comprises a catalyst material comprising particles comprising iridium or a mixture of iridium and iridium oxide. The particles include an interconnected network of nanoparticles. The particles are in the range of 50 nm to 1 [mu] m, and the nanoparticles are in the range of 2 nm to 15 nm. It may have a BET surface area of 30 m2 / g or greater and a pore volume of at least 0.10 cc / g. The catalyst is prepared using an organic structure directing agent.

The utility model provides a micro-fluidic chip and a micro-fluidic system, a micron-sized main channel is arranged in the micro-fluidic chip, and a sample to be detected is introduced into a generation area of the main channel to form a large number of micro-droplets. The micro-droplets serve as a reaction container to react with tyrosine and tyrosinase which are guided into the reaction area of the main channel, and finally absorbance testing can be conducted on the micro-droplets in the detection area of the main channel. The micro-droplets are small in volume, have high surface area to volume ratio, and can form a reaction container for efficient reaction. The microfluidic system can rapidly and accurately measure to-be-detected samples with different concentrations, and has the advantages of low reagent consumption, energy conservation, environmental protection, small required detection space, large-scale parallel operation and the like.

The invention relates to the technical field of crop monitoring, in particular to a crop phenotypic parameter automatic calculation and extraction method based on a multi-source remote sensing image. Comprising the steps that all images are determined to be in the same coordinate system through geographical registration, point cloud file conversion and ground specific point matching, and image registration is achieved; performing automatic or semi-automatic segmentation on the images determined in the same coordinate system to obtain a multi-source crop remote sensing image cell segmentation map; extracting plant phenotypic parameters, physical parameters and chemical parameters from the multisource crop remote sensing image cell segmentation map by using an algorithm; the plant phenotype parameters comprise a vegetation index, a plant height, a surface area, a volume, a canopy coverage degree and a vegetation projection area; the physical parameters comprise a canopy average temperature value, a canopy temperature standard deviation and a canopy temperature variation coefficient; the chemical parameters comprise chemical elements such as nitrogen, phosphorus, potassium, calcium and magnesium in soil and vegetation. The method has the advantages that large-scale data processing and high-precision area prediction are realized, and the crop growth monitoring capability is enhanced.

The invention discloses a high-specific-surface-area high-nitrogen-oxygen-doped lignin porous carbon material as well as a preparation method and application thereof. The method comprises the following steps: firstly, preparing a supramolecular compound from lignin, magnesium hydroxide, cyanuric acid and melamine through solvothermal reaction, then directly carbonizing to obtain a nitrogen-doped lignin carbon / magnesium oxide compound, and activating the nitrogen-doped lignin carbon / magnesium oxide compound by using weakly corrosive sylvite to increase a micro-mesoporous structure. Therefore, the nitrogen and oxygen doped lignin porous carbon material with ultrahigh specific surface area and rich micro-mesopores is prepared. According to the obtained lignin porous carbon material with the high specific surface area and high nitrogen and oxygen doping, a large number of active sites can be provided due to the high specific surface area, wettability of the carbon material can be improved due to high nitrogen and oxygen doping, the utilization rate of the active sites is increased, and the problem that the pore diameter of the carbon material is not matched with a current carrier is solved due to the rich micro-mesoporous structure; and the specific capacitance of the zinc ion hybrid capacitor is obviously improved.

The invention belongs to the field of polymer modification and processing, and particularly relates to a nano photocatalytic self-cleaning composite material, a fresh-keeping cover and a preparation method of the fresh-keeping cover. The composite material comprises aliphatic nylon, a maleic anhydride grafted copolymer, nano titanium dioxide, carbon nanotubes, boron nitride, a coupling agent, a release agent and an antioxidant. The nano photocatalytic self-cleaning composite material is prepared by taking nano titanium dioxide as an antibacterial active agent and adding a certain amount of carbon nanotubes and boron nitride powder. The carbon nanotubes can conduct electrons, have high surface area and high adsorption capacity, and are good dopants and carriers for titanium dioxide as photocatalysts. Hexagonal boron nitride can effectively improve separation and transfer of photo-induced electron-hole pairs of the material, so that the visible light response photocatalytic activity is enhanced. And by adding the carbon nanotubes and boron nitride, the dispersing performance of nano titanium dioxide can be physically improved, titanium dioxide agglomeration is prevented, and the photocatalytic self-cleaning performance of the nano titanium dioxide is improved.

The invention discloses a low-temperature-rise, high-impermeability and low-carbon concrete nano-fluid additive as well as a preparation method and application thereof, and relates to the technical field of graphene materials. The nanofluid additive comprises water and graphene and a dispersing agent which are dispersed in the water, the dispersing agent comprises polyvinyl alcohol and / or sodium carboxymethyl cellulose, and the preparation method comprises the following steps: adding graphite powder into a dispersing agent solution, and then sequentially carrying out shearing stripping and emulsifying stripping to obtain a mixed solution; and centrifuging the mixed solution, and collecting the supernatant to obtain the nanofluid additive. The graphene nanofluid is added into the cement-based material as an additive, can effectively absorb and disperse hydration heat release in the cement hydration process, and slows down the hydration reaction rate, so that the overall hydration heat is reduced. Meanwhile, the high surface area and the two-dimensional structure of the graphene are beneficial to filling micro-pores of the cement-based material, and the impermeability, the durability and the mechanical property of the cement-based material are improved.

The present disclosure relates to a hemostatic composition and a hemostasis kit including the same. More particularly, the present disclosure relates to a rapidly applicable hemostatic composition and a hemostasis kit including the same. The hemostatic composition according to the present disclosure includes a polysaccharide, a stabilizer, a binder, thrombin and an antibiotic, in which the polysaccharides is coated with the stabilizer, binder and thrombin, and the antibiotic is mixed with the coated polysaccharide. Since the hemostatic composition according to the present disclosure is provided in the form of a polysaccharide powder coated with a stabilizer, a binder, and thrombin, the hemostatic composition can be stored for a long period of time even at room temperature due to a large interaction area between the stabilizer and the thrombin, can be well fixed to the application site due to the binder, and has good hemostatic efficacy due to the high surface area of thrombin. In addition, the hemostatic composition can prevent infection at the bleeding site due to the presence of the antibiotic. In addition, the hemostatic composition may be mixed with a cationic solution that is separately stored, so that the hemostatic composition may be used as a hydrogel hemostatic agent if necessary. In addition, the powdered hemostatic composition can be housed in an endoscopic dispensing instrument to control bleeding during endoscopic procedures as needed, and thus can be used in a variety of bleeding situations.

The present disclosure relates to a process for the preparation of hydrophobic carbon black. The process of the present disclosure is simple, requires mild process conditions, and does not generate effluent. The process of the present disclosure is highly efficient in producing hydrophobic carbon black of different morphologies. The carbon black so obtained by using the process of the present disclosure has comparatively high surface area and high hydrophobicity.

The invention discloses a leukemia targeted therapy preparation as well as a preparation method and application thereof. Comprising a DNA nanoflower carrier targeting leukemia cells through a PTK7 receptor and benzene arsenic oxide loaded on the carrier. The DNA nanoflower carrier is obtained by rolling circle amplification, and a nucleic acid aptamer complementary sequence of targeted binding leukemia cells is introduced into a template chain subjected to rolling circle amplification. The preparation method comprises the following steps: modifying sulfydryl onto a DNA nanoflower by using DNA-Dithiol, then breaking a disulfide bond by using reduced glutathione to expose the sulfydryl, and loading benzene arsenic oxide onto the DNA nanoflower through a reaction between trivalent arsenic and the sulfydryl. The structure of the DNA nanoflower has a high surface area and high porosity, and can load a large amount of PAO, so that the killing performance on cancer cells is enhanced; the aptamer sgc8 sequence is introduced into the DNA nanoflower, so that the targeting of the DNA nanoflower to cancer cells is effectively realized; the preparation also has the advantages of being good in thermodynamic stability, easy to store, excellent in biocompatibility and the like, and has a very good application prospect.

The invention relates to the technical field of water treatment, and discloses a method for circularly inducing crystallization, hardness removal and desalination of calcium carbonate. Adding the seed crystal into high salt water; adding sodium hydroxide into the heavy salt water; adding sodium carbonate to generate a supersaturated solution; introducing the solution containing the calcium carbonate crystal nucleus into crystallization equipment; treating the reacted solution through solid-liquid separation equipment; further desalting the water body subjected to hardness removal by adopting a membrane separation mode; collecting and treating the formed calcium carbonate precipitate, and recovering the precipitate by adopting a separation technology; by adopting the synthesized vaterite type seed crystal, the hardness removal and desalination efficiency is remarkably improved in the cyclic induced crystallization process of calcium carbonate. Compared with the traditional non-synthetic seed crystal, the synthetic seed crystal has higher surface area and uniformity, so that the combination of calcium ions and carbonate ions can be more quickly induced to form a stable crystal nucleus, and the overall effect of the reaction is finally improved.

The disclosure describes various aspects of a vibrationally isolated cryogenic shield for local high-quality vacuum. More specifically, the disclosure describes a cryogenic vacuum system replicated in a small volume in a mostly room temperature ultra-high vacuum (UHV) system by capping the volume with a suspended cryogenic cold finger coated with a high surface area sorption material to produce a localized extreme high vacuum (XHV) or near-XHV region. The system is designed to ensure that all paths from outgassing materials to the control volume, including multiple bounce paths off other warm surfaces, require at least one bounce off of the high surface area sorption material on the cold finger. The outgassing materials can therefore be pumped before reaching the control volume. To minimize vibrations, the cold finger is only loosely, mechanically connected to the rest of the chamber, and the isolated along with the cryogenic system via soft vacuum bellows.

The invention belongs to the technical field of polymer composite materials, and particularly relates to a low-odor polypropylene composite material as well as a preparation method and application thereof. The low-odor polypropylene composite material comprises the following components: PP resin, a filler, an antioxidant, a lubricant and a deodorant COF (at) ZnO composite material, the COF material has a porous structure and regular pore channels, shows high porosity and high surface area, is rich in benzene ring structure, and adsorbs benzene series and other small molecular substances generated during melt extrusion of polypropylene by conjugate action and physical action; nano ZnO is dispersed on the surface of the COF material and can play a role in photocatalysis and degradation of VOCs substances, meanwhile, a COF framework can accelerate electron transfer to promote catalysis, odor improvement is achieved through the synergistic effect of nano ZnO and COF framework, and the problem that in the prior art, a polypropylene material volatilizes odorous gas is solved.

The invention discloses a preparation method of a lithium battery composite material, in the preparation method, by optimizing insect shells and a large number of oxygen-containing functional groups on the surfaces of the insect shells, the insect shells are subjected to pretreatment, carbonization treatment and post-treatment, and the oxygen-containing functional groups still remain on the surfaces of electrodes after carbonization; the existence of the oxygen-containing functional groups is very beneficial to improving the electrochemical energy storage effect of the electrode, and after activation treatment, the electron transmission effect is enhanced by a high surface area and a conductive network, and the thermal stability of the material can be obviously improved by adhering a small amount of calcium sulfate while the conductivity is ensured. Besides, the whole process is simple, the components interact, the whole material has excellent conductivity, lithium ions are slowly released under the regulation and control of the porous material, the situation that a large amount of lithium ions move in a short time, consequently, a large amount of heat is released in the battery, the battery structure is damaged, and the service life of the battery is shortened is avoided, the capacity retention rate of the battery is increased, and the service life of the battery is prolonged. The battery service life is prolonged.

Adsorptive membranes with sponge-like structures for direct recovery of lithium from geothermal brines and recycling of water from geothermal evaporation ponds are disclosed. The membrane surfaces are functionalized with task-specific chemicals capable of selective separation of lithium through host-guest complexation mechanism. The sponge-like structure provides high surface area resulting in an enhanced lithium adsorption capacity. The technology disclosed here aims to reduce the time required for lithium enrichment by evaporative concentration of geothermal brines and address the water loss problem thereof through enhanced solar-driven recycling of water.

The invention discloses a method for preparing precipitated silicon dioxide for a heavy truck, and belongs to the technical field of silicon dioxide preparation, the method comprises the following steps: S1, selecting solid sodium silicate with modulus of 3.3-3.5, preparing a sodium silicate solution with concentration of 30-35 wt%, in the preparation process, firstly putting the solid sodium silicate into a crusher for crushing, and then putting the crushed solid sodium silicate into a stirrer for stirring; then adding the crushed solid sodium silicate into deionized water, stirring, and heating in the stirring process; the specific surface area of the target product is high and reaches 200-240 m < 2 > / g, the dispersion grade reaches 9.8 or above, meanwhile, the mechanical strength is remarkably improved, the tensile strength reaches 25 MPa or above, the 300% stress at definite elongation reaches 7.0 MPa or above, a two-step seed crystal method preparation process is adopted, the regularity of the microstructure of the product is higher, and the product has the higher surface area and higher mechanical performance.

The present disclosure provides a coated paper product comprising: —a paper or paperboard substrate: —a barrier coating, wherein the barrier coating comprises graphene and a polyolefin copolymer bearing carboxylic acid moieties, wherein the polyolefin copolymer bearing carboxylic acid moieties preferably is ethylene-acrylic acid copolymer (EAA) or ethylene-methacrylic-acid-copolymer (EMAA) or maleic acid ethylene copolymer (MAE), and wherein the graphene content in the barrier coating is 0.3-3 wt %. There is also provided a coated paper product comprising high surface area graphite flakes having an average particle size of 2-7 μm instead of the graphene.

The invention relates to a micro-channel heat exchanger of a three-period minimal curved surface structure, and belongs to the technical field of heat exchangers. Comprising a heat exchange core body, an inlet collector assembly, an outlet collector assembly and a fuel gas shell. Wherein the gas shell is of a cylindrical structure which is vertically arranged in the axial direction; the heat exchange core body is of a cuboid structure; the heat exchange core body is arranged at the central position of the inner cavity of the gas shell; the inlet collector assembly is arranged on the side wall of the top end of the fuel gas shell. The inlet collector assembly extends into an inner cavity of the gas shell and communicates with the heat exchange core. The outlet collector assembly is arranged on the side wall of the bottom end of the fuel gas shell. The outlet collector assembly extends into the inner cavity of the fuel gas shell and communicates with the heat exchange core body; a fuel gas flowing cavity is defined by the outer wall of the heat exchange core body and the inner wall of the fuel gas shell. The problem of stress concentration is avoided, and the heat exchanger has the advantages of being high in surface area-volume ratio, good in connectivity of flow channels in the structure, high in heat exchange efficiency and the like.

A method for producing heat-resistant membranes with high surface area and surface porosity to be used in batteries, fuel cells and electrolysers comprises preparing single and / or more solutions, applying an electrospinning process to the single and / or more solutions, thereby obtaining a nanofiber membrane.

Presently described are chemically activated lignocellulosic carbon adsorbent materials comprising high surface area, high microporosity, and low impurities, and methods of making the same. The described structures provide unexpected advantages as compared to currently available materials.

The invention provides benzoyl peroxide gel and a preparation method thereof. The preparation method comprises the following steps: S1, preparing an active phase; s2, preparing a gel phase; s3, mixing half of the active phase with the gel phase, and performing constant-temperature water bath to obtain low-crosslinking-degree gel; s4, uniformly granulating the low-crosslinking-degree gel, mixing the low-crosslinking-degree gel with the balance of the active phase, and performing vacuum negative-pressure stirring twice to obtain a material; and S5, adding a pH regulator into the material, regulating the pH value, discharging and filling. Nanocrystals are formed through benzoyl peroxide pretreatment, the surface area and activity are improved, the curative effect is enhanced on the premise of safety, uniform dispersion can be achieved, the stability of benzoyl peroxide in gel is improved, and the storage time is prolonged. A part of the active phase and the gel phase are mixed to form low-crosslinking-degree gel, the low-crosslinking-degree gel is uniformly granulated and then mixed with the remaining active phase, and the benzoyl peroxide gel is prepared through vacuum negative pressure, so that the swelling property can be improved, the stability and the permeability can be improved, and adverse reactions such as irritation to skin can be avoided.

A sensing element for detecting a target gas or gases is disclosed. The element includes a pair of interdigitated electrodes, with a gap between each electrode in the pair. A high surface area metal oxide nanomaterial decorated with a noble metal is deposited on interdigitated electrode pair to bridge the gap. The surface area of the metal oxide nanomaterial is greater than 100m2 / g and the size of the metal oxide nanomaterial is within the range of 100-200nm. The resistance across the pair of electrodes varies when the metal oxide nanomaterial binds with the target gas or gasses. From this sensing element, sensor chips and sensor modules may be constructed to detect multiple gases.

The present disclosure describes membranes suitable for use in soft tissue repair applications that are composed of fibrous and highly porous biodegradable materials fabricated using electrospinning and that may be surface-modified with plasma treatment or other suitable methods of surface modification. The disclosed membranes have a high surface area to volume ratio. In some implementations, use of the disclosed membranes provides a barrier that prevents the migration of soft tissue cells but is permeable to small molecules such as nutritional substances and medications. In other implementations, use of the disclosed membranes provides a scaffold to facilitate soft tissue repair by providing a suitable environment for cellular infiltration and interaction to promote tissue regeneration. Methods of fabricating the disclosed resorbable membranes for soft tissue repair applications using electrospinning are also disclosed. The disclosed membranes may have precisely tuned physical, chemical, and mechanical properties optimized for various soft tissue repair applications.

A method for preparing a nitrogen / sulfur-rich activated carbon, of exceptionally high surface area and microporous nature, the method comprising: preparing an aromatic oligomer including a heteroatom using an oxidative polymerization solution, wherein the oxidative polymerization solution comprises a first oxidizer and an organic solvent; mixing the oligomer with an activating agent to obtain a mixture; subjecting the mixture to carbonization and activation in a tube furnace; holding the mixture at a set temperature; cooling the mixture to room temperature to obtain a carbon material; purifying the carbon material by washing; washing the carbon material with water and methanol; drying the carbon material under vacuum to obtain a microporous carbon of high surface area and nitrogen / sulfur-rich composition.

The invention relates to the technical field of sewage treatment, and discloses a preparation method of a porous ceramic loaded sulfur-based composite filler and application of the porous ceramic loaded sulfur-based composite filler in nitrogen and phosphorus removal of sewage. Porous ceramic is taken as a carrier, active components are loaded in a layered manner by adopting a gradient filling process, an inner-layer siderite composite gel and calcite complex dynamically neutralizes H < + > generated by sulfur autotrophy, and pH buffering is realized through sulfo group reversible proton exchange; the compressive strength of the middle-layer pyrite composite gel is improved through C-O-Fe bonding, a Pi-Pi conjugate electron pathway is constructed by polypyrrole-coated hybrid gel, electron transfer is accelerated, and Fe < 2 + > is released to precipitate phosphate; sulfur-charcoal on the outer layer forms nano sulfur crystals, and denitrification is quickly started by utilizing a high specific surface area. Sulfur consumption and sulfate accumulation are reduced through sulfur-iron oxidation-reduction circulation. The filler realizes high-efficiency nitrogen and phosphorus removal of sewage under the condition that a carbon source and a pH regulator are not required to be additionally added.

The invention relates to the technical field of porous material preparation process optimization, in particular to a porous material preparation process optimization method. The method comprises the steps of obtaining microscopic pore distribution characteristic data to generate preliminary design parameters, constructing a microstructure model to optimize pore sizes, adjusting key element distribution to generate an improved scheme, determining an optimal process parameter combination through simulation testing, detecting pore uniformity in real time and dynamically adjusting parameters. And monitoring the element utilization rate to generate a dynamic adjustment scheme and verifying the performance index to generate an optimization record. Intelligent control over preparation of the porous material can be achieved, the surface area, the pore uniformity and the key element utilization rate are remarkably increased, and reliable technical support is provided for application in the fields of catalysis, environmental protection and the like.

There is disclosed magnetic covalent organic frameworks (COFs) functionalized with Fe3O4 nanoparticles (Fe3O4@HMN-COF, Fe3O4@MAN-COF, and Fe3O4@SIN-COF) for the efficient removal and degradation of imidacloprid (IMI) from aqueous solutions. These COFs, incorporating nitrogen-rich frameworks and π-electron systems, enhance IMI adsorption through π-π interactions, hydrophobic interactions, and hydrogen bonding. The magnetic properties provided by Fe3O4 nanoparticles allow rapid separation from water using an external magnetic field. The COFs exhibit high surface areas, with BET surface areas reaching up to 910 m2 / g, and high adsorption capacities, up to 600 mg / g. The COFs also exhibit excellent stability, high surface area, and reusability, with minimal loss in performance over multiple cycles. Photocatalytic degradation of IMI is optimized under UV light, with Fe3O4@HMN-COF achieving 98.5% degradation efficiency under specific conditions. These magnetic COFs present a sustainable solution for remediating pesticide-contaminated water, demonstrating effectiveness in various real-world applications.

The application provides a gallium oxide field effect transistor device and a preparation method thereof. The device comprises a substrate, an n-type gallium oxide channel layer arranged on the substrate, a drain electrode and a source electrode arranged on the n-type gallium oxide channel layer, a gate dielectric layer arranged between the drain electrode and the source electrode, and a gate electrode arranged on the gate dielectric layer. The n-type gallium oxide channel layer comprises a first channel and at least one fin channel corresponding to a portion between the drain electrode and the source electrode. The first channel is deviated to a side of the source electrode. The fin channel is arranged between the drain electrode and the first channel. A cross section of the fin channel is in a symmetrical ladder shape pointing to the source electrode, and the number of ladders is greater than or equal to 2. A vertical projection of the gate electrode on the n-type gallium oxide channel layer covers a connecting area of the fin channel and the first channel. The application can make the gate electrode have a higher surface area and increase the threshold voltage through the fin channel structure. The size of the fin channel is reduced, the peak electric field is reduced, and the breakdown voltage of the device is improved.

The present invention relates to a 3D gradient current collector for lithium metal negative electrode and its preparation and application, with porous conductive material as 3D conductive skeleton, organic matter as upper layer, and lithium-philic metal as lower layer, the upper layer is prepared by molecular layer deposition, and the lower layer is prepared by sputtering; the prepared lithium-hating-lithium-philic 3D gradient current collector has high surface area and large lithium storage space, which is conducive to reducing the actual current density of lithium deposition and avoiding lithium dendrites from piercing the diaphragm; on the other hand, the introduction of the upper lithium-hating material is conducive to suppressing the uneven deposition of lithium metal, and the introduction of the lower lithium-philic material can realize the directional deposition of lithium metal and enhance the deposition uniformity. The 3D current collector is used for the negative electrode current collector of lithium metal battery, and through the synergistic effect of the above two aspects, the cycle stability of lithium metal negative electrode and the safety performance of battery can be greatly improved, and it has important practical application value.

The present disclosure provides a dosage form or a bolus configured for administration to a ruminant, comprising: (i) a core comprising a haloform adsorbed to a high surface area material or porous sorbent, and (ii) a housing which encapsulates the core and prevents direct release of the core into a rumen of the ruminant. The present disclosure also provides a system for inhibiting methane production in a ruminant, and a method of inhibiting methane production in a ruminant.

High-surface area carbon nanotubes having targeted, or selective, oxidation levels and / or content on the interior and exterior of the tube walls are claimed. Such carbon nanotubes can have little to no inner tube surface oxidation, or differing amounts and / or types of oxidation between the tubes' inner and outer surfaces. Additionally, such high-surface area carbon nanotubes may have greater lengths and diameters, creating useful mechanical, electrical, and thermal properties.