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63results about How to "Well-ordered pore structure" patented technology
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Preparation method of nitrogen-doping ordered mesoporous carbon materials
InactiveCN103072973AWell-ordered pore structureHigh dopingCarbon preparation/purificationMolecular sieveSpace group
The invention provides a preparation method of nitrogen-doping ordered mesoporous carbon materials. According to the method, rich-hydroxyl saccharide carbohydrate is used as carbon sources, ammonia water is used as nitrogen sources, amination reaction under the hydrothermal condition is adopted for preparing rich-nitrogen precursors, mesoporous silica molecular sieves SBA-15 (space group P6mm) are used as templates, and the nitrogen-doping ordered mesoporous carbon materials in two-dimensional orthohexagonal ordered mesostructures are prepared through multi-time wetting combined with the high-temperature themolysis technology.
Owner:LANZHOU UNIVERSITY OF TECHNOLOGY
High amino content ordered mesoporous silicon dioxide film and its preparation method and application
InactiveCN101214966AHigh transparencyImprove thermal stabilitySilicaTenebresent compositionsPolymer scienceSilanes
The invention relates to a preparing process and application sequential mesoporous silicon dioxide film with high amino content. The preparing process of the invention takes various surface active agent as template, takes tetraethyl ortho-silicate and 3-3-aminopropyl triethoxysilane as the silicon source, utilizing sol-gel manner, leading the amino silane to take the molar percentage of the whole silane of 30-60 by introducing amino silane directly part of silica sol, after forming homogeneous solution, relying on the synergy of the silane and organic templates, forming films by dip-coating on the clear substrate, finally forming functional sequential silicon dioxide film with different meso-structure and high amino content. The silicon dioxide mesoporous film of the invention has perfect assembly and fixing property to organic molecules, inorganic anions, protein, enzyme molecule and the like object materials.
Owner:NAT UNIV OF DEFENSE TECH
Nano-crystal large poresize mesopore oxide material and its preparation method
InactiveCN1948161AWell-ordered pore structureHighly ordered pore structureTantalum compoundsTitanium dioxideSpace groupOrganic solvent
Owner:FUDAN UNIV
Fluorescent carbon quantum dot/mesoporous alumina composite luminescent material, and preparation method and application thereof to oxygen sensing aspect
ActiveCN106867525ALarge specific surface areaHigh porosityNano-carbonFluorescence/phosphorescencePore diameterCarbon quantum dots
The invention belongs to the field of a composite luminescent material, and discloses a fluorescent carbon quantum dot / mesoporous alumina composite luminescent material, and a preparation method and application thereof to the oxygen sensing aspect. The composite luminescent material comprises fluorescent carbon quantum dots and mesoporous alumina used as a substrate material, wherein the fluorescent carbon quantum dots are fluorescent carbon quantum dots containing hydroxyl or amidogen, and the size is 10nm or below. The specific surface area of the mesoporous alumina is large; the pore diameter distribution is narrow, i.e., the specific surface area / pore volume rate is high; the surface has many hydroxyl; through the hydrogen bond effect, the fluorescent carbon quantum dots with hydroxyl and amidogen at the surface can be easily adsorbed; through simple experiment operation, the fluorescent carbon quantum dots with the proper pore diameter can be assembled into a pore passage of the mesoporous alumina; the fluorescent carbon quantum dot / mesoporous alumina composite luminescent material is formed. Oxygen molecules can be uniformly dispersed in the pore passage of the mesoporous alumina; an oxygen sensing material with high luminescent stability, high sensitivity and short reaction time is formed.
Owner:SOUTH CHINA AGRI UNIV
Method for preparing nanocrystalline titanium dioxide film used by dye sensitization solar battery
ActiveCN1921153AIncrease specific surface areaGood light transmissionLight-sensitive devicesFinal product manufactureSlurrySolar battery
The invention relates to a method for preparing the nanometer Titania film of dope sensitized solar-energy battery. Wherein, it uses organic titanate as titania source, uses polymer template solvent, to be dissolved in organic solvent to prepare initial slurry, and uses silk screen print technique to print titania film at the surface of conductive glass, then treats at high temperature to obtain the nanometer titania film. The inventive product has high transmission rate, large surface area, high stability and long service life. And the invention has low cost while it can be used in optical catalyst, glass plating, and sensor.
Owner:HUAQIAO UNIVERSITY
Preparation method of iron oxide/carbon fiber composite lithium ion battery negative electrode material
ActiveCN108630921ALarge specific surface areaWell-ordered pore structureCell electrodesSecondary cellsFiberHigh rate
The invention discloses a preparation method for an iron oxide / carbon fiber composite lithium ion battery negative electrode material. The preparation method comprises the following steps: taking an iron based metal organic framework as a precursor, mixing the precursor with a PAN solution, and performing electrostatic spinning to obtain a metal organic framework / PAN fiber; and thermally treatingthe metal organic framework / PAN fiber under inert atmosphere to prepare an iron oxide / carbon fiber composite material. The iron oxide / carbon fiber composite material prepared by the preparation methodhas good toughness, conductivity, an ordered pore channel structure and a great specific surface area, is taken as a lithium ion battery negative electrode material, and has relatively high first-time discharge specific capacity, relatively high charge specific capacity, highly high first-time coulomb efficiency, relatively high circulating stability and relatively high rate performance.
Owner:XIAN UNIV OF SCI & TECH
Preparation method of mesoporous silicon dioxide hollow sphere
The invention provides a preparation method of a mesoporous silicon dioxide hollow sphere, relates to a silicon dioxide hollow sphere, and provides a preparation method of a mesoporous silicon dioxide hollow sphere. The method comprises the steps of: adding a silicon dioxide sphere into water, and ultrasonically processing to obtain silicon dioxide sphere dispersion solution; adding a cationic surface active agent into the obtained silicon dioxide sphere dispersion solution, adding an alkali source, and etching in a stirring way; and collecting, cleaning and drying a precipitate after etching to obtain white powder, and removing the cationic surface active agent out of the white powder to obtain the mesoporous silicon dioxide hollow sphere. The silicon dioxide sphere is taken as a template, and the mesoporous silicon dioxide hollow sphere is prepared by means of carrying out alkali etching under the effect of the cationic surface active agent. The preparation method has the advantages of being strong in operability, low in cost, simple in reaction device, mild in preparation processing condition, cleaning and pollution-free in reaction processe, and high in reaction efficiency and the like. Compared with other synthesis method, the preparation method is good in industrial application prospect.
Owner:XIAMEN UNIV
Shape-controlled mesoporous silica nano-material and preparation method thereof
InactiveCN103204506AShape is easy to controlLarge specific surface areaMaterial nanotechnologySilicon compoundsHydrofluoric acidMesoporous silica
The invention discloses a shape-controlled mesoporous silica nano-material and a preparation method thereof. The preparation method comprises the steps of: firstly, taking mesoporous silica micro-nano particles as precursors, using magnesium powder as a reducing agent, controlling the heating rate at 0.1-5 DEG C / min, heating to 500-800 DEG C to carry out magnesium thermal reduction reaction for 2-12 hours, as to obtain the shape-kept mesoporous silica / magnesium oxide compound; then removing reaction product magnesium oxide and residual silica by hydrochloric acid and hydrofluoric acid solution respectively, so as to obtain corresponding shape-controlled mesoporous silica nano-material; preparing corresponding shape-controlled mesoporous silica nano-material when the mesoporous silica micro-nano particles with different shapes are adopted as the precursors; finally obtaining the mesoporous silica nano-material which has an ordered duct structure, wherein the specific surface area is 150-360m<2> / g; the aperture is 7.0-10.6nm; and the pore volume is 0.3-0.8cm<3> / g. Furthermore, the method is simple in preparation step, low in cost, and suitable for large-scale production.
Owner:SHANGHAI INST OF TECH
Preparation method of mesoporous beta-TCP (tricalcium phosphate) powder
ActiveCN104445130ASmall apertureIncrease the aperturePhosphorus compoundsTri calcium phosphateBeta tcp
The invention relates to a preparation method of mesoporous beta-TCP (tricalcium phosphate) powder. The preparation method comprises steps as follows: 1), two parts of transparent solutions containing surfactants, cosurfactants and water are prepared; 2), a calcium-containing inorganic salt solution and a phosphorus-containing inorganic salt solution are added to the transparent solutions respectively and stirred, a phosphorus-containing inorganic salt mixed solution is added to a calcium-containing inorganic salt mixed solution, the pH value is adjusted, and the mixture is stirred to obtain an emulsion; and 3), the mixture is left to stand, subjected to ageing, centrifugation, washing and drying, placed in a high-temperature furnace, heated and subjected to heat preservation, and mesoporous beta-TCP powder is obtained. The preparation method has the benefits as follows: 1, the operation is simple, energy consumption is low, the cost is low, the reaction condition is mild, and harmful substances are not generated in the preparation process; and 2, the obtained mesoporous beta-TCP powder has smaller pore diameter and has a three-dimensional pore structure, the average pore diameter of the mesoporous beta-TCP powder is 8.80-21.36 nm, and the specific surface area is 10.11-153.43 m<2> / g.
Owner:WUHAN UNIV OF TECH
Preparation method and application of cobalt oxide/mesoporous carbon composite material electrochemical sensor
InactiveCN107228889AHigh sensitivityHigh selectivityMaterial electrochemical variablesLinear relationshipNanocomposite
The invention relates to the field of rapid detection of food safety and particularly relates to a preparation method and application of an electrochemical sensor based on a cobalt oxide / mesoporous carbon nanocomposite material and application of the electrochemical sensor in fast detection of nitrite content in a food. The preparation method of the electrochemical sensor comprises preparing a nanocomposite material carrying cobalt oxide particles and graphitized mesoporous carbon, and modifying a work electrode of the electrochemical sensor. The electrochemical sensor can detect a standard solution of nitrite, determine the linear relationship between the nitrite concentration and current, determine nitrite in the food and compare the nitrite content in the food and the linear relationship to obtain nitrite content of the food to be detected. The electrochemical sensor can determine nitrite content of a food, is easy to operate, has a fast detection rate and high detection sensitivity and provides a novel detection method for efficient and rapid detection of nitrite content in a food.
Owner:SHANGHAI OCEAN UNIV
Mesoporous cerium zirconium solid solution composite oxide nano material and preparation method thereof
InactiveCN102807252APromote crystallizationWill not cause channel collapseMaterial nanotechnologyRare earth metal compoundsActive agentMesoporous silica
The invention discloses a mesoporous cerium zirconium solid solution composite oxide nano material and a preparation method of the mesoporous cerium zirconium solid solution composite oxide nano material. A non-ionic surface active agent is used as a template, an organic silicon source and an organic high-molecular polymer are used as organic precursors, an inorganic zirconium source and an inorganic zirconium source are used as inorganic precursors, an organic-inorganic composite is formed by an evaporating inductive multielement co-assembly method, then the organic-inorganic composite is carbonized at the temperature of 700-1100 DEG C to form the mesoporous silicon dioxide / carbon / cerium zirconium solid solution composite oxide; furthermore, the carbon is oxidized in the air at the temperature of 400-500 DEG C to form the mesoporous silicon dioxide / cerium zirconium solid solution composite oxide; and finally, the silicon dioxide template in the composite is removed by alkaline solution treatment, in this way, the large-aperture mesoporous cerium zirconium solid solution composite oxide nano material with high specific surface area and high pore volume is obtained. The mesoporous cerium zirconium solid solution composite oxide nano material can bear the high temperature of 700-1100 DEG C, the preparation method is simple and feasible, low in cost, good in repeatability, and is easy to be subjected to large-scale production.
Owner:SHANGHAI INST OF TECH
Preparation method of highly dispersed hierarchical pore H-ZSM-5 molecular sieve of framework metal
ActiveCN109368657AGood dispersionThe process steps are simplePentasil aluminosilicate zeoliteMetal frameworkCrystallinity
The invention discloses a preparation method of a highly dispersed hierarchical pore H-ZSM-5 molecular sieve of a framework metal. The preparation method comprises the following steps: treating carbonblack by oxidation treatment to prepare hydrophilic carbon black as a hard template; preparing a nanoscale double metal specie by a space limitation method as a metal source of doping the framework;synthesizing a metal framework doped hierarchical pore H-ZSM-5 molecular sieve by one-step in-situ hydro-thermal synthesis; and preparing an H type molecular sieve by means of Na type molecular sieveion exchange. The H-ZSM-5 molecular sieve prepared by the method retains the advantages of a microporous molecular sieve and regular mesoporous ducts are added in the structure, so that the mass transfer performance of the molecular sieve is improved. The method solves the problems of degree of crystallinity and destroy of active center of a parent body of the molecular sieve as a result of a post-treatment method. The active metal sites of the molecular sieve are increased by isomorphous substitution of the nano metal specie, so that the reaction performance of the catalyst is improved. The dosage of a reagent caused by regulating / modifying the molecular sieve structure for many times is saved, and the catalyst preparation process flow is shortened.
Owner:CHINA UNIV OF MINING & TECH
Modified mesoporous silica adsorbent and preparation method and application thereof
ActiveCN105617979ALarge specific surface areaImprove hydrophilicityOther chemical processesProcess efficiency improvementSorbentMesoporous silica
The invention relates to a modified mesoporous silica adsorbent and a preparation method and application thereof. Under the catalysis of potassium carbonate and potassium iodide, aza-macrocyclic ligand is modified onto the surface of chlorine group functional mesoporous silica through nucleophilic substitution, and the adsorbent is prepared; palladium recycling and enrichment under different nitric acid concentrations are achieved through the adsorbent, and the selective recovery performance of palladium in highly-active effluent simulated feed liquid is evaluated. According to the modified mesoporous silica adsorbent, mesoporous nanomaterials are combined with the supermolecule recognition performance of the aza-macrocyclic ligand, the problems that selectivity is poor, operation is complex, the raw material cost is high and the stability is poor in the traditional treatment technology for palladium in highly-active effluent are solved, and the adsorbent has the advantages of being good in selectivity, large in adsorption capacity, high in adsorption speed and easy to recycle for palladium within the wide nitric acid concentration range, and has the great practical significance in the aspects of nuclear fuel reprocessing and hydrometallurgy.
Owner:TSINGHUA UNIV
Preparation of Ti-MCM-41 mesoporous material with functionalized ionic liquid and application thereof
InactiveCN102179268AEasy to makeWell-ordered pore structureOrganic chemistryOrganic-compounds/hydrides/coordination-complexes catalystsPropylene carbonateAmmonium bromide
The invention relates to the preparation of a Ti-MCM-41 mesoporous material with functionalized ionic liquid and an application thereof. The preparation method comprises the following steps of: adopting CTAB (Cetyltrimethyl Ammonium Bromide) as a template agent, adopting TEOS (tetraethyl orthosilicate) as silicon source, and adopting tetrabutyl titanate as a precursor; preparing solution according to mol ratio; crystallizing, filtering, washing, drying and roasting to obtain Ti-MCM-41; then coupling to obtain Ti-MCM-41-Cl; and adopting the Ti-MCM-41-Cl to react with N-methylimidazole; cooling, extracting, washing and drying to obtain the mesoporous material Ti-MCM-41-lm with functionalized ionic liquid. The preparation and the application have the following advantages: the method is simple in process; the mesoporous material Ti-MCM-41-lm with functionalized ionic liquid has orderly and uniformly distributed hole-channel structures; the surface of the mesoporous material has acid sites; and the mesoporous material is adopted as a catalyst for the reaction of epoxypropane with carbon dioxide to produce propylene carbonate.
Owner:TIANJIN UNIV
Mesoporous zirconia nano material and method for preparing same
InactiveCN102774886APromote crystallizationWill not cause channel collapseNanotechnologyZirconium oxidesActive agentMesoporous silica
The invention discloses a mesoporous zirconia nano material and a method for preparing the same. A non-ionic surfactant is taken as a template agent, an organic silicon source and an organic macromolecular polymer are used as organic precursors, an inorganic zirconium source is used as an inorganic precursor, a method for assembling the four components through evaporation and induction is utilized to form an organic-inorganic composite, and the organic-inorganic composite is then calcinated into a mesoporous silicon dioxide / carbon / zirconia composite at 700-1100 DEG C; the mesoporous silicon dioxide / carbon / zirconia composite is further calcinated into a mesoporous silicon dioxide / zirconia composite at 400-500 DEG C in the air; and finally, a silicon dioxide template agent in the composite is removed through aqueous alkali treatment, so the mesoporous zirconia nano material is obtained. The obtained mesoporous zirconia nano material has good pore passage ordering, high zirconia crystallization degree, the specific surface area of 195-400 m<2> / g, a pore diameter of 3-8nm and a pore volume of 0.3-1.0 cm<3> / g. The method for preparing is simple, practicable and low in cost, and has high repeatability.
Owner:SHANGHAI INST OF TECH
Preparation method and catalysis application of acidic-basic functionalized mesoporous material by using solid-state ionic migration method
InactiveCN102091645AEasy to prepareGood thermal stabilityMolecular sieve catalystsPreparation from organic carbonatesSolventOrder structure
The invention relates to a preparation method and catalysis application of an acidic-basic functionalized mesoporous material by using a solid-state ionic migration method. The preparation method comprises the steps of: with a mixture of Mg(NO3)2.6H2O and Al(NO3)3.9H2O, or a mixture of Mg(NO3)2.6H2O and AlCl3.6H2O, or a mixture of Mg(OH)2 and Al(OH)3, or a mixture of Mg(CH3COO)2.4H2O and Zn(NO3)2.6H2O, or a mixture of Mg(CH3COO)2.4H2O and ZnSO4.7H2O as a precursor, mixing with a mesoporous material SBA-15 prepared by using a thermal synthesis method, grinding, and calcining to prepare the acidic-basic functionalized mesoporous material, wherein the acidic-basic functionalized mesoporous material is used as a catalyst in the esterification reaction of synthesizing ethyl methyl carbonate. The invention has the advantages of simple preparation process, no need of any solvent, ordered structure and uniform distribution of holes, large specific surface area, and good thermal stability and hydrothermal stability, and realizes the function of acid-base concerted catalysis.
Owner:TIANJIN UNIV
Synthesis of mesoporous catalyst for synthesizing phenol through direct hydroxylation of benzene
InactiveCN108940370AFacilitate solid-liquid separationGood dispersionOrganic chemistryOrganic compound preparationReaction timingChemistry
The invention relates to a catalyst for synthesizing phenol through direct hydroxylation of benzene and a preparation method thereof. Ammonia functionalization mesoporous silica is used as a carrier of the catalyst, and vanadiumoxy acetylacetonate is used as an active component of the catalyst. The catalyst is applied to the reaction of synthesizing the phenol through the direct hydroxylation of the benzene under the condition of hydrogen peroxide; when the reaction temperature is 50-70 DEG C, the reaction time is 4-6h, the conversion rate of benzene is 15-20%, the selectivity of phenol is 96-99%, and the yield of final phenol is 14-20%. Compared with the conventional catalyst for catalytic reaction, the catalyst has the advantages of being simple in product separation, relatively high incatalytic activity and the like.
Owner:CHANGZHOU UNIV
Method for synthesizing tungsten-modified alumina mesoporous material through solvent-evaporation induced self-assembly and catalysis application thereof
InactiveCN106179321AEvenly distributedWell-ordered pore structureOrganic compound preparationHydroxy compound preparationCelluloseMesoporous material
The invention relates to a method for synthesizing a tungsten-modified alumina mesoporous material through solvent-evaporation induced self-assembly and a catalysis application thereof. The invention provides a tungste-modified WO3 / Al2O3 mesoporous material through solvent-evaporation induced self-assembly with a one-step method, the prepared tungste-modified WO3 / Al2O3 mesoporous material catalyst has ordered and uniformly distributed tunnel structures, the specific surface is 140-200 m<2> / g, the pore diameter is 8.6 nm-9.4 nm, the hydro-thermal stability is good, and the mesoporous material has acidity and bond breaking function. The mesoporous material can be used for preparing glycol by cellulose hydrogenolysis and conversion. The preparation method requires only one step, the process is simple, the prepared catalyst has high specific surface area of mesoporous alumina and bond breaking function of tungsten oxide, and the catalytic activity for conversing cellulose to glycol with one step is enhanced.
Owner:TIANJIN UNIV
Preparation method of SBA-15 loaded N-doped TiO2 visible catalyst
ActiveCN103203247AReduced band gapVisible light catalytic activity is highMolecular sieve catalystsIce waterHigh absorption
The present invention discloses a preparation method of an SBA-15 loaded N-doped TiO2 visible catalyst. The preparation method comprises the following steps of (1) dissolving P123 in hydrochloric acid solution, dropwise adding tetraethyl orthosilicate and stirring, thermostatically stirring up and filtrating the mixture solution; rinsing resulting precipitate until no chloride ion is present in the precipitate, and drying the precipitate to obtain SBA-15 intermediates; (2) mutually dissolving metatitanic acid, concentrated aqueous ammonia and hydrogen peroxide in an ice-water bath, sitring up the mixture solution to obtain a green yellow solution, adding the SBA-15 intermediates into the green yellow solution, so as to obtain a suspension; (3) removing the resulting suspension into a microwave reactor, so as to obtain an intermediate product; (4) filtering, scrubbing, drying and calcining the intermediate product, so as to obtain a finished product. The SBA-15 with surfactant is used as carrier, so as to effectively keep the ordered pore canal structure of the carrier, ensure high absorption capacity, and effectively prevent TiO2 from glomerating during the heat treatment process, with low manufacture cost..
Owner:HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
Dust collecting device for electric tool
ActiveCN106975277AAvoid dustyGood water resistance and elasticityCombination devicesDispersed particle filtrationElectrical and Electronics engineeringElectric machine
Owner:柳州市昌泉贸易有限公司
Synthesis method of mesoporous beta-tricalcium phosphate microemulsion
ActiveCN104495773ASmall apertureGood biocompatibilityPhosphorus compoundsInorganic saltsSynthesis methods
The invention relates to a synthesis method of a mesoporous beta-tricalcium phosphate microemulsion. The method comprises the following steps: 1) adding a surfactant, an oil phase and a co-surfactant to water, and stirring evenly, so as to obtain a microemulsion; 2) adding a calcium inorganic salt solution to the microemulsion, fully stirring, adding a phosphorous inorganic salt solution, adjusting the pH value of the emulsion, keeping the temperature invariable, and stirring to obtain the emulsion; and 3) standing, ageing, separating out sediments by using a centrifuging method, washing, drying, then putting into a high-temperature furnace, heating, and carrying out heat preservation, so as to obtain mesoporous beta-TCP powder. The synthesis method has the beneficial effects that 1, the synthesis method disclosed by the invention is simple, easy to operate, good in repeatability and low in energy consumption; and 2, the mesoporous beta-TCP powder obtained by the synthesis method disclosed by the invention is relatively small in aperture, and has a three-dimensional pore structure; the mean pore size is 7.11-20.25nm; and the specific surface area is 12.85-156.38m<2> / g.
Owner:WUHAN UNIV OF TECH
Preparation of rare earth doping fluorescent functional mesoporous material
InactiveCN101475182AEffective dopingSimple methodSilicaTenebresent compositionsFluorescenceRare earth ions
The invention relates to a method for preparing a rare-earth doped fluorescence functionalized mesoporous material. The method comprises that: (1) one or more surfactants as a pore forming agent is dissolved in deionized water and is stirred to clarification; (2) a silicon source and a salt solution of rare-earth ion RE are added to the solution; the acidity of a reaction medium is regulated by acid; the mixed solution is continuously stirred for 6 and 24 hours at a temperature of between 25 and 60 DEG C to generate white precipitate; (3) the white precipitate and the solution are transferred to a polytetrafluoroethylene reaction kettle, and are subjected to hydrothermal treatment for 24 to 48 hours under the condition of temperature of between 80 and 140 DEG C; and (4) the solution is cooled, filtered, washed and roasted to obtain a product. The method is simple; the obtained mesoporous material has good luminous performance; a pore canal has an ordered structure; and a pore wall is provided with a great amount of silicon oxhydryls which have interaction with a loaded substance to realize high-efficient loading of medicine, gene, and the like; and the method can be used in the fields such as fluorescence-tracked medical or biological carrier.
Owner:DONGHUA UNIV
Fe-M/CNTs denitration catalyst, preparation method and application of catalyst in ammonia selective catalytic reduction to nitrogen oxide
InactiveCN107029736AIncrease impactLarge specific surface areaNitrous oxide captureDispersed particle separationCarbon nanotubeNitric oxide
The invention discloses a Fe-M / CNTs denitration catalyst, a preparation method and application of the catalyst in ammonia selective catalytic reduction to nitrogen oxide and belongs to the technical field of environmental catalyzed purification. The catalyst is prepared by adopting an impregnation method simple in operation and high in repeatability, namely a suitable iron source and a molybdenum source or a tungsten source are evenly impregnated on the surface of a carbon nanotube subjected to acid treatment, drying and calcination are performed, and then the denitration catalyst is obtained. The prepared Fe-M / CNTs denitration catalyst has high surface active particle dispersion, high low-medium-temperature catalytic activity and a wide operatable temperature window and has the NOx conversion rate of 90% above within the 250-400 DEG C, the N2 selectivity is kept to 85% or above, the flue gas sulfur oxide and water impact resisting capability I strong, and the Fe-M / CNTs denitration catalyst is suitable for a fixed-source nitric oxide purification device represented by coal-fired power plant flue gas and has a wide industrial application prospect.
Owner:DALIAN UNIV OF TECH
Preparation method for MCM-41 loaded Pt and Al catalyst and application thereof
InactiveCN107376979ALarge specific surface areaWell-ordered pore structureMolecular sieve catalystsPolyethylene glycolHydrosilylation
The invention provides a preparation method for an MCM-41 loaded Pt and Al catalyst and application thereof. The method comprises the following steps: (1) preparing meso-porous silicon MCM-41, namely stirring cetyl trimethyl ammonium bromide, distilled water and concentrated ammonia water and then adding tetraethyl orthosilicate, continuously stirring for 7h and then stopping reaction, crystallizing under room temperature, filtering, washing and drying, removing cetyl trimethyl ammonium bromide, washing and roasting, thereby acquiring the meso-porous silicon MCM-41; (2) preparing the MCM-41 loaded Pt and Al catalyst, namely adding the activated meso-porous silicon MCM-41 and dehydrated ethyl alcohol into a container, introducing N2 for transition and then adding chloroplatinic acid-ethanol solution and aluminum chloride-ethanol solution, thereby acquiring the MCM-41 loaded Pt and Al catalyst. The catalyst is used for the catalytic hydrosilylation of heptamethyltrisiloxane and polyethylene glycol allyl ether. The product provided by the invention has the advantages of high stability, high reusability, high activity, convenience in recycling, low cost, and the like.
Owner:ZHONGKAI UNIV OF AGRI & ENG +1
Preparation method of cerium-based composite oxide low-temperature SCR catalyst taking Ce-MOF as precursor
InactiveCN111013597AImprove the catalytic activity of low temperature SCR reactionSynthesis shortcutDispersed particle separationCatalyst activation/preparationPtru catalystPhysical chemistry
The invention discloses a preparation method of a cerium-based composite oxide low-temperature SCR catalyst taking Ce-MOF as a precursor, and belongs to the technical field of catalyst preparation. The method comprises the following specific steps: dissolving trimesic acid (BTC) into an organic solvent, adding a cerium salt solution, and stirring for 15 min at a proper temperature to obtain a Ce-MOF sample; dissolving a soluble modified metal source into ethanol, adding Ce-MOF, and stirring for 12 h at a certain temperature to obtain a precursor of a composite oxide catalyst; and roasting andgrinding the precursor, so as to obtain the CuO-CeO2 and Fe2O3-CeO2 low-temperature SCR catalyst. According to the invention, high dispersion of CuO or Fe2O3 on CeO2 is realized by utilizing the highspecific surface area, ordered pore structure and relatively strong adsorption capacity of Ce-MOF, so that the low-temperature SCR reaction catalytic activity of the composite oxide is remarkably improved.
Owner:BEIJING UNIV OF TECH
Preparation method of hydroxyapatite microspheres
InactiveCN111892033AParticle size controllableFlexible and controllable particle sizePeptide preparation methodsPhosphorus compoundsCalcium biphosphateMicrosphere
The invention discloses a preparation method of hydroxyapatite microspheres. The preparation method comprises the following steps of: (1) introducing a calcium source and a phosphorus source into a solvent to form a calcium phosphate suspension; (2) adding polymer seeds into a dispersion system containing ethanol / water to form a uniformly dispersed seed suspension, the solid content of the polymerseeds being 5-9 g / L; (3) adding the calcium phosphate suspension into the seed suspension, performing uniform stirring, and gradually adding an emulsifier and an initiator, the emulsifier and the initiator satisfying the following proportional relationship: W=W0 (V / 3.5-4.5); and (4) calcining polymer-hydroxyapatite microspheres at a high temperature to obtain the porous hydroxyapatite microspheres. The prepared porous hydroxyapatite microspheres are controllable in particle size, uniform in particle size and controllable in pore diameter.
Owner:无锡迈科为生物科技有限公司
Method for preparing nanocrystalline titanium dioxide film used by dye sensitization solar battery
ActiveCN100492678CIncrease specific surface areaGood light transmissionLight-sensitive devicesFinal product manufactureSlurrySolar battery
Owner:HUAQIAO UNIVERSITY
Preparation method of iron oxide/carbon fiber composite lithium ion battery negative electrode material
ActiveCN108630921BLarge specific surface areaWell-ordered pore structureCell electrodesSecondary cellsElectrospinningMetal-organic framework
The invention discloses a preparation method for an iron oxide / carbon fiber composite lithium ion battery negative electrode material. The preparation method comprises the following steps: taking an iron based metal organic framework as a precursor, mixing the precursor with a PAN solution, and performing electrostatic spinning to obtain a metal organic framework / PAN fiber; and thermally treatingthe metal organic framework / PAN fiber under inert atmosphere to prepare an iron oxide / carbon fiber composite material. The iron oxide / carbon fiber composite material prepared by the preparation methodhas good toughness, conductivity, an ordered pore channel structure and a great specific surface area, is taken as a lithium ion battery negative electrode material, and has relatively high first-time discharge specific capacity, relatively high charge specific capacity, highly high first-time coulomb efficiency, relatively high circulating stability and relatively high rate performance.
Owner:XIAN UNIV OF SCI & TECH
Monodisperse porous hydroxyapatite microsphere, preparation method and application of microsphere
PendingCN107140617AParticle size controllableFlexible and controllable particle sizeIon-exchange process apparatusOther chemical processesMicrosphereMacromolecule
The invention discloses a monodisperse porous hydroxyapatite microsphere, a preparation method and an application of the microsphere. The preparation method comprises the following steps of: (1) introducing a porous high polymer microsphere into water, adding alkali during stirring after uniform dispersion, regulating PH (potential of hydrogen) to be 10-11 to form a solution A, (2) introducing a calcium source and a phosphorus source into the water to form a solution B, (3) gradually dropwise adding the solution B into the solution A, continuing reaction after dropwise adding to form a solution C, (4) filtering the solution C, and performing washing and drying to form a high polymer-hydroxyapatite composite microsphere, and (5) calcining the high polymer-hydroxyapatite composite microsphere to form the porous hydroxyapatite microsphere. The hydroxyapatite microsphere is controllable and uniform in particle size and controllable in aperture, a preparation technology is simple, and a reaction condition is easy to control. The microsphere is suitable for large-scale production and can be widely applied to the fields of bioseparation, tissue engineering and the like.
Owner:SUZHOU KNOWLEDGE & BENEFIT TECH CO LTD
Preparation method of high-efficiency composite wood fire retardant
InactiveCN111300567AIncrease the areaHigh pore volumeWood treatment detailsWood impregnation detailsTetrachlorideAlcohol
The invention provides a preparation method of an efficient composite wood fire retardant, and relates to the technical field of fire retardants. The preparation method comprises the following steps:preparing mesoporous SiO2; adding mesoporous SiO2 into deionized water, and carrying out ultrasonic oscillation to prepare a suspension; adding antimony trichloride into concentrated hydrochloric acid, stirring to completely dissolve, adding the suspension in a dropwise manner, continuously stirring for 20-40 minutes after dropwise adding is finished, and filtering; leaching the solid with deionized water three times, adding into ammonia water, boiling, filtering, leaching with deionized water three times, and drying to obtain mesoporous SiO2-Sb2O3; and adding the mesoporous SiO2-Sb2O3 into azinc chloride solution, adding tin tetrachloride into absolute ethyl alcohol, stirring to dissolve the tin tetrachloride, slowly adding the tin tetrachloride into the zinc chloride solution in a dropwise, stirring for 20 to 30 min, then adding a sodium hydroxide solution, carrying out accelerating stirring for 2 to 5 h, standing for 10 to 15 h, filtering, spraying with deionized water to be neutral, then adding into oleic acid, dipping, taking out, and drying. The fire retardant disclosed by the invention is excellent in smoke suppression and flame retardant effect, and the mechanical propertyof wood can be correspondingly improved.
Owner:安徽智晟通讯科技有限公司
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