61 results about "Porous spheres" patented technology

The invention provides a modified ferric sodium phosphate pyrophosphate positive electrode material and a preparation method and application thereof.According to the preparation method, mature sanding, spray drying and calcining processes are adopted, and the ferric sodium phosphate pyrophosphate / carbon positive electrode material with a porous spherical structure and high phase purity is prepared by optimizing the combination of raw materials; and the performance breakthrough of high specific capacity, super-large rate capability and excellent super-large rate cycle performance is realized. The provided preparation method is simple and convenient in technological process, high in controllability and suitable for industrialization, the selected raw materials are wide in source and low in cost, the energy consumption in the technological process is relatively low, and the comprehensive production cost has remarkable advantages; the synthesized ferric sodium pyrophosphate / carbon positive electrode material obtains excellent dynamic performance, electrochemical performance and structural stability at an ultra-large rate at 20 DEG C based on special morphology characteristics and relatively high phase purity.

The present invention relates to a method of increasing the sun protection factor (SPF) of a sunscreen composition, the use of porous metal oxide spheres (e.g. microspheres) for increasing the SPF of a sunscreen composition and the preparation of a sunscreen composition comprising said porous spheres.

The present disclosure belongs to the technical field of lithium-supplementing agents, and disclosed are a positive electrode lithium-supplementing agent, and a precursor thereof, a preparation method therefor and the use thereof. The positive electrode lithium-supplementing agent precursor comprises a core material and a shell material, which coats the surface of the core material, wherein the core material is a porous spherical material composed of nanosheets, and the core material contains Ni(OH)2; and the shell material contains at least one of an oxide of an M element and a hydroxide of the M element, with the M comprising at least one of Mn, Co, Cu, Mg, Ca, Fe, Sr, Al and Ti. The shell material of the precursor is adsorbed on the core material and can react with a lithium source at low temperatures, so as to generate a lithium-containing metal oxide, which coats the surface of the core material and promotes a reaction between the lithium source and Ni(OH)2 to form a good solid solution, thereby realizing the effect of reducing the sintering temperature and facilitating obtaining a high-purity lithium-supplementing material. The positive electrode lithium-supplementing agent prepared from the precursor has low hygroscopicity and high stability.

The invention relates to an iron-based Prussian blue positive electrode material and a preparation method and application thereof, the molecular formula of the iron-based Prussian blue positive electrode material is as follows: 0 < x < = 2, 0 < y < = 1, 0 < z < = 1, the iron-based Prussian blue positive electrode material is a hollow porous sphere structure formed by stacking cubic nanoparticles, the average particle size of the hollow porous sphere structure is 0.3-8 [mu] m, and the average particle size of the hollow porous sphere structure is 0.5-8 [mu] m. And the wall thickness of the hollow porous ball structure is 0.08 mu m-2 mu m. When the iron-based Prussian blue positive electrode material is used as a sodium ion battery positive electrode material, the iron-based Prussian blue positive electrode material has excellent rate capability and cycle performance.

The invention discloses a synthesis method and application of nitrogen-doped carbon-coated Co porous spheres, cobalt nitrate hexahydrate and 4-picolinic acid are dissolved in a mixed solution, the mixed solution comprises dimethylformamide and absolute ethyl alcohol, then the mixed solution is transferred into a reaction kettle for heating reaction, and after the reaction is finished, centrifugal drying is performed to obtain a Co coordination compound precursor; and calcining the precursor in an argon hydrogen atmosphere, and selecting and setting a proper heating rate, a proper calcining temperature and a proper calcining time to obtain the nitrogen-doped carbon-coated Co porous ball. The obtained nitrogen-doped carbon-coated Co porous ball is used as the air cathode of the zinc-air battery, so that high power density and excellent charge-discharge cycle stability are realized.

The present invention discloses a sodium ion battery hard carbon material, a preparation method thereof, and a sodium ion battery using the hard carbon material. The hard carbon material is a composite porous material inlaid with hollow porous spheres and porous carbon sheets. Compared with the prior art, the advantages of the present invention are: a method for preparing sodium ion hard carbon materials from concentrated papermaking black liquor in a short process using spray pyrolysis, using spray pyrolysis to construct a precursor material with a hollow porous spherical structure; using an aqueous solution to collect the precursor material, and removing impurities through solid-liquid separation and washing; and then further regulating the microstructure of the carbon material through two-stage heat treatment to obtain a hard carbon negative electrode material with high specific capacity, excellent rate performance, and cycle stability. Using the hard carbon material as the negative electrode, a high-energy-density sodium ion battery is prepared.

The present invention belongs to the technical field of material preparation and application, and discloses a nano-spherical porous copper porphyrin, a preparation method thereof and uses thereof. The present invention uses gallium black phosphorus as a template to drive the coordination of 5,10,15,20-tetrakis(4-aminophenyl)porphyrin and terephthaloyl chloride to induce the directional formation of nano-porous copper porphyrin with gallium black phosphorus as the core; the nano-porous copper porphyrin material prepared by the present invention is a porous sphere, and has excellent photodynamic, chemical kinetic and photothermal properties. Under dark conditions, it has the characteristics of catalase and catalyzes the production of hydroxyl radicals from hydrogen peroxide; under red light irradiation, it can continuously generate singlet oxygen; under near-infrared light irradiation, it has good photothermal properties, and this material is expected to be applied to the treatment of drug-resistant bacterial infections.

The invention provides an asphalt-based silicon-carbon porous sphere negative electrode material as well as a preparation method and application thereof, and relates to the technical field of battery materials. The preparation method comprises the following steps: performing spray drying on asphalt to obtain asphalt-based carbon microspheres; the preparation method comprises the following steps: dispersing asphalt-based carbon microspheres in an organic solvent, sequentially adding a template agent and a silicon source, carrying out a stirring reaction to obtain an intermediate, carrying out heat treatment on the intermediate in a reducing atmosphere, and then carrying out etching by using an etching agent to obtain the asphalt-based silicon-carbon porous sphere negative electrode material. According to the preparation method, asphalt is carbonized into spheres in one step, the obtained carbon microspheres have the characteristics of uniform morphology and high sphericity degree, then a certain pore structure is formed while low-activity SiO2 is reduced and removed, the asphalt-based SiOx / C porous sphere negative electrode material with the core-shell structure is obtained, volume expansion of an electrode material in the lithium ion charging and discharging process can be effectively inhibited, and the performance of the lithium ion battery is improved. And lithium ion diffusion is accelerated, so that the lithium ion battery negative electrode material with high reversible specific capacity and long cycle stability is obtained.

The present invention relates to the cosmetic use of porous spheres comprising a metal oxide for improving the appearance and / or comfort of the skin, skin integuments, notably the hair, and / or mucous membranes. The invention also relates to a cosmetic or pharmaceutical composition comprising said spheres.

The invention relates to the production of porous spherical or shell-shaped aerogel particles or spheres of selected polysaccharides based on alginate, pectin, amidopectin, chitosan, carrageenan, and / or cellulose, wherein a solution containing a carbonate ion-containing solution of one or more of the polysaccharides is brought into contact with an acid-containing regeneration bath or an acid-containing solution of the polysaccharides is brought into contact with a carbonate ion-containing regeneration bath and then removed from the regeneration bath following the gelation process, the solvent is exchanged, and a drying process is carried out.

The invention relates to the field of sodium ion batteries, in particular to a nickel-doped porous spherical carbon-coated sodium ferric phosphate composite material as well as a preparation method and application thereof. The nickel-doped porous spherical carbon-coated sodium ferric phosphate composite material comprises a central layer and a carbon coating layer, the carbon coating layer is a nickel-doped carbon layer, and a nickel element is doped in crystal lattices of Na4Fe3 (PO4) 2P2O7 in a form of replacing an iron site; the conductivity and sodium ion diffusion kinetics are improved from the interior of a bulk phase through Ni doping, a uniform Ni-doped carbon coating layer constructs a high-speed electron transport network outside particles, internal and external synergism is achieved, and the rate performance and low-temperature performance of the material are remarkably improved. Crystallization, carbonization and nickel doping are completed in one step at low temperature, damage of high temperature to the material structure is avoided, meanwhile, close coupling of a carbon layer and an active substance is achieved, limitation of traditional step-by-step treatment is broken through, and the method has remarkable industrial advantages.

The invention relates to the technical field of biology, in particular to a magnetic microsphere, a preparation method and application thereof and a reagent containing the magnetic microsphere. The preparation method comprises the following steps: firstly, preparing carboxyl-containing polymer microspheres by a one-step method, then carrying out heat treatment under an alkaline condition, and then carrying out THF oscillation to finally prepare porous polystyrene carboxyl microspheres with uniform pore channels, meanwhile, avoiding using divinyl benzene as a cross-linking agent, reducing the luminous background of the finally obtained magnetic microspheres, and improving the luminous efficiency of the magnetic microspheres. The method can be better applied to the field of chemiluminescence immunoassay. Due to the existence of a surface porous structure and carboxyl, the stability and the functionalization degree of the magnetic material are improved, the problems of magnetic leakage and magnetic shell layer falling are avoided, the surface of the porous ball is smoother and more uniform, and a solid foundation is laid for the subsequent coating process and reduction of non-specific adsorption of the surface of the magnetic ball; the magnetic ball is prepared by using a grinding method, and has the advantages of safety, no toxicity, easiness in operation, no pollution and easiness in industrial popularization.

The invention discloses a contact separation type friction catalytic device, which relates to the technical field of catalytic devices, and comprises a porous spherical shell, a hollow square body is arranged in the porous spherical shell, the contact separation type friction catalytic device also comprises semicircular friction plates, and the semicircular friction plates are uniformly arranged on the hollow square body. Different from the prior art, the scheme is based on a unique electrification principle, the contact and separation electrification efficiency is mainly influenced by the contact area and the characteristics of materials, namely, the larger the contact area is, the higher the electrification efficiency is, based on the characteristic, the size design of the device has higher flexibility, the device can be directly manufactured into a larger size, and the device is convenient to use. The friction device does not need to be made into small particles through a complex process in the prior art, the working time of the device is not limited, and the friction device can continuously and stably work as long as the internal structure of the device is kept intact; due to the characteristic, the device has remarkable advantages in an application scene needing long-time continuous operation.

This invention discloses a contact-separation tribocatalytic device, belonging to the field of catalytic device technology. It includes a porous spherical shell containing a hollow square body. The device also includes semi-circular friction plates uniformly disposed on the hollow square body. Unlike existing technologies, this solution is based on a unique electrification principle. Its contact-separation electrification efficiency is mainly affected by the contact area and the material's inherent properties; that is, the larger the contact area, the higher the electrification efficiency. Based on this characteristic, the device's size design has greater flexibility, allowing it to be directly manufactured in larger sizes without the need for complex processes to produce small particles as in existing technologies. The device's operating time is unrestricted; as long as the internal structure remains intact, the tribocatalytic device can operate continuously and stably. This feature gives the device a significant advantage in applications requiring long-term continuous operation.

The present invention provides a collection and enrichment system for microbial aerosols, including an aerosol collection component, an aerosol enrichment component and a sample collection component, wherein the aerosol collection component is connected to the input end of the aerosol enrichment component, and the sample collection component is sleeved on the outside of the aerosol enrichment component. The aerosol enrichment component includes an aerosol enricher and a collection tube cover, wherein a cell maintenance solution is contained in the aerosol enricher, the bottom end of the aerosol enricher is open and a filter plate is packaged on the outside of the open; an air inlet pipe and an air outlet pipe are penetrated on the collection tube cover, the air inlet pipe includes a first end and a second end, the air outlet pipe includes a third end and a fourth end, the first end and the third end are located above the collection tube cover, the second end and the fourth end are both located in the aerosol enricher, the second end is fixedly connected to a porous spheroid, the porous spheroid is located in the cell maintenance solution, the first end is connected to a first vacuum pump, the fourth end is located above the liquid surface of the cell maintenance solution, and a plug is detachably inserted in the third end.

To provide an electrophotographic belt with minimal toner color shift and fewer transfer defects. [Solution] An electrophotographic belt having a surface layer, wherein the surface layer contains (meth)acrylic resin, porous spherical particles, and conductive particles different from the porous spherical particles, the surface of the porous spherical particles at the outermost surface of the surface layer is covered with the (meth)acrylic resin and the conductive particles, the ten-point average roughness Rz (according to JIS B 0601-1994) of the outermost surface of the surface layer is 0.5 times or more and less than 2 times the average primary particle diameter of the porous spherical particles, and the average spacing S (according to JIS B 0601-1994) of the local peaks at the outermost surface of the surface layer is 4 times or more and less than 30 times the average primary particle diameter of the porous spherical particles.

The invention discloses a preparation method of impregnated carbon powder composite porous spheres for comprehensive protection, which comprises the following steps: (1) stirring a zirconium source and pretreated impregnated carbon powder in a citric acid aqueous solution, and uniformly mixing to obtain a mixed solution; (2) dropwise adding an acid solution of chitosan into the mixed solution prepared in the step (1) to obtain a sol compound; (3) dropwise adding the sol compound into alkali liquor, and curing and forming to obtain a composite porous ball; and (4) carrying out washing, freezing and vacuum drying treatment on the composite porous ball, and then carrying out sealed impregnation in organic amine to obtain the composite porous ball adsorbent mainly containing the impregnated carbon powder. According to the preparation method, the waste impregnated carbon powder is effectively utilized, the composite porous ball is prepared through modification, the preparation method is simple and environmentally friendly, and the composite porous ball has the capability of comprehensively protecting toxic gases and can synchronously protect the toxic gases such as NH3, SO2 and CNCl.

Provided are: a porous spherical silica having a large number of pore diameters, a high pore volume, and a narrow pore diameter distribution; and a method for producing the porous spherical silica. [Solution] A porous spherical silica characterized by having a pore volume as determined by mercury intrusion method of 0.5-8 ml / g, a mode pore diameter as determined by mercury intrusion method of 5-50 nm, and a ratio of a pore volume in the range of + / -5 nm of the mode pore diameter to the total pore volume of 40% or more. A fumed silica dispersion, which is dispersed so that the particle size distribution reaches a prescribed range, is formed into a spherical shape by an emulsion method and then gelled, thereby being able to be produced.

The invention discloses a lithium ion capacitor positive electrode material, a preparation method thereof and a lithium ion capacitor adopting the positive electrode material, the positive electrode material is an active carbon material, the active carbon material has a spherical porous structure, a part of carbon spheres are collapsed, the BET specific area is 300-1000m < 2 > / g, and the active carbon material is a porous spherical material rich in mesoporous structures. Compared with the prior art, the method has the advantages that high-content moisture brought in in the spraying process, sodium hydroxide in the papermaking black liquid, sodium oxide generated by decomposing sodium salt and high temperature are utilized at the same time, and carbonization and activated pore-forming of the papermaking black liquid can be achieved in one step in the high-temperature pyrolysis process; the active carbon material with high specific surface area and abundant pores is obtained. The active carbon is used as a positive electrode to prepare the lithium ion capacitor with high energy density.

The invention discloses a preparation method and application of a mixed phenolic formaldehyde copolymerized porous spherical carbon material. The preparation method comprises the following steps: (1) uniformly mixing a phenolic compound with formaldehyde; (2) carrying out prepolymerization reaction on the material obtained in the step (1) under a weak acidic condition to form a prepolymer; (3) transferring the prepolymer obtained in the step (2) into a high-pressure reaction kettle, and carrying out hydrothermal reaction to obtain spherical resin; and (4) heating and carbonizing the spherical resin obtained in the step (3) in a protective atmosphere to obtain the porous spherical carbon material. The spherical morphology of the prepared porous spherical carbon material reduces the anisotropy of the electrode material and inhibits the structure collapse in the cycle process, which is crucial for prolonging the cycle life of the battery; the material shows unique advantages in the field of super capacitor electrodes, and due to high conductivity, large specific surface area and an adjustable pore system, the material can realize efficient charge storage and rapid charge and discharge processes.

This invention relates to a weather-resistant fiberglass reinforced plastic (FRP) pipe material for above-ground applications and its preparation method, belonging to the field of composite material preparation technology. The FRP pipe material comprises: 100 parts unsaturated polyester resin, 1-5 parts curing agent, 0.5-3 parts accelerator, 20-30 parts glass fiber, 10-20 parts nano-sheet magnesium hydroxide, 0.12-0.45 parts antioxidant, and 5-15 parts UV stabilizer. The UV stabilizer is a porous spherical CeO2-SnO2. The addition of one-dimensional glass fiber, two-dimensional magnesium hydroxide, and porous spherical CeO2-SnO2 during the preparation of the FRP pipe significantly improves the material's mechanical properties. This FRP pipe material exhibits excellent performance in anti-aging and UV resistance, while its mechanical properties are significantly improved, providing a superior technical solution for FRP pipe materials used in above-ground environments.

The invention relates to the technical field of gas sensors, in particular to a potential type carbon dioxide sensor based on a porous spherical ZnCo2O4-ZnO sensitive electrode, which comprises a solid electrolyte substrate, a platinum reference electrode, the porous spherical ZnCo2O4-ZnO sensitive electrode, a signal acquisition component and a fixing assembly. The sensitive electrode is prepared through a hydrothermal method, electrostatic spinning and other processes, and has high specific surface area and excellent gas diffusion performance. According to the invention, the detection sensitivity, selectivity and response speed of carbon dioxide can be obviously improved, the cross sensitivity is reduced, and high-precision monitoring requirements in a complex environment are met. Tests show that the sensor has the characteristic of quick response to low-concentration carbon dioxide at 450 DEG C and has a good application prospect.

The invention discloses a porous sphere surface-enhanced Raman detection material as well as a preparation method and application thereof, and relates to the field of materials and detection. The surface-enhanced Raman detection material takes a composite oxide of titanium dioxide and zinc oxide as a component; based on the mass of the surface-enhanced Raman detection material, the mass percentage of titanium dioxide is 40-70%, and the mass percentage of zinc oxide is 30-60%. The surface-enhanced Raman detection material not only can enhance Raman signals, but also can effectively avoid agglomeration of the surface-enhanced Raman detection material in the use process.

The present invention relates to a method for increasing sun protection factor (SPF) of a sunscreen composition, use of porous metal oxide spheres (e.g., microspheres) for increasing SPF of a sunscreen composition and preparation of sunscreen compositions comprising the porous spheres.

The present invention provides porous spherical silica having a large modal pore size, a high pore volume, and a sharp pore size distribution, and a method for producing the same. The pore volume measured by mercury porosimetry is 0.5 ml / g or more and 8 ml / g or less, The most common pore size measured by mercury porosimetry is 5 nm or more and 50 nm or less, The porous spherical silica is characterized in that the ratio of the volume of pores present within a range of ±5 nm of the mode pore diameter to the total volume of pores is 40% or more. The porous spherical silica can be produced by forming a fumed silica dispersion, which has been dispersed so as to have a particle size distribution within a predetermined range, into spheres by an emulsion method, and then gelling the spheres.

A ceramic article and method of manufacturing. The ceramic article comprises a porous ceramic material having a microstructure comprising an interconnected network of porous spheroidal ceramic beads. The microstructure has a total open porosity defined as the sum of an open intrabead porosity of the beads and an interbead porosity defined by interstices between the beads in the interconnected network. The microstructure has a bimodal pore size distribution having an intrabead peak corresponding to the open intrabead porosity and an interbead peak corresponding to the interbead porosity. An intrabead median pore size of the intrabead porosity is less than an interbead median pore size of the interbead porosity.

The invention relates to an aminated slag-based regular porous ball as well as a preparation method and adsorption application thereof, and belongs to the technical field of solid waste recycling and sewage adsorption materials. The method solves the problems that an existing slag-based adsorption material is irregular in shape and influences engineering application, and a functionalization method is low in efficiency and limited in adsorption performance. According to the technical scheme, the preparation method comprises the following steps: mixing slag, an alkali activator, water and a dispersant into slurry, adding chitosan and a foaming agent, injecting into a spherical mold, and curing to obtain a regular porous precursor; and carrying out hydrothermal reaction on the precursor in a specific amino compound aqueous solution to finally obtain the product. According to the method, the regular sphere shape of the material is guaranteed through mold forming, engineering use is facilitated, high-density amino active sites are introduced into the material through hydrothermal reaction, and the adsorption performance is improved. The prepared porous ball is mainly used for adsorbing and removing pollutants in a water body.

The invention discloses a cement-based negative poisson ratio composite metamaterial constructed based on porous ball bionic unit cells and a preparation method and application thereof, and relates to the technical field of composite materials. The cement-based negative Poisson's ratio composite metamaterial is composed of simulated unit cells and a high-toughness cement-based material, wherein the simulated unit cells are combined by spherical topological structures with negative Poisson's ratios, and the high-toughness cement-based material is attached to the surfaces of the simulated unit cells. And the high-toughness cement-based material is continuously and uniformly attached to the surface of the imitation unit cell to form a compact shell. A porous ball imitated unit cell topological structure is designed and constructed to serve as a macroscopic reinforcement body, spherical units are stacked to form an imitated unit cell structure, and when the material bears a compression load, ligaments at the connecting positions of conical holes can generate unique torsional buckling, and then the whole imitated unit cell structure is unstable; therefore, a strong negative Poisson's ratio effect is generated. The deformability and the energy absorption performance of the cement-based material can be effectively improved through the effect.