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46results about How to "Has superparamagnetic properties" patented technology
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Preparation method of magnetic-functionalized graphene composite material
InactiveCN102583336AHas superparamagnetic propertiesImprove conductivityCarbon compoundsInorganic material magnetismEthylenediamineMagnetization
The invention provides a preparation method of a magnetic-functionalized graphene composite material, and relates to preparation of a graphene composite material. According to the invention, the preparation method is simple, the raw material is easily obtained, and the industrial production is easy; the prepared magnetic-functionalized graphene composite material has superparamagnetic property and is higher in saturated magnetization; and the graphene carrier is good in conductivity, and loaded ferroferric oxide nano particles are uniformly distributed, are small and are good in crystallizability. The preparation method comprises the following steps of: matching ethanediamine and water into a mixed solvent, then ultrasonically dispersing graphite oxide and iron acetylacetonate in the mixed solvent, and obtaining ethanediamine / dispersion of the graphite oxide and the iron acetylacetonate; transferring the ethanediamine / dispersion of the graphite oxide and the iron acetylacetonate into a reactor lined with polytetrafluoroethylene for reaction and obtaining solid products; and cleaning the solid products, collecting the products with a magnet, drying and obtaining the magnetic-functionalized graphene composite material.
Owner:XIAMEN FUNANO NEW MATERIAL TECH COMPANY
Magnetic composite material and application thereof in regeneration and repair of bone tissues
ActiveCN102049066AHas superparamagnetic propertiesGood biocompatibilityTissue regenerationProsthesisHydroxybutyric acidPolyamide
The invention discloses a magnetic composite material and an application thereof in regeneration and repair of bone tissues, as well as a method for preparing the magnetic composite material and a product prepared by the magnetic composite material, wherein the magnetic composite material comprises the following components: a) 10-50g of polymer material calculated by 100ml of organic solvent, wherein the polymer material is selected from polylactic acid, polyglycolic acid, lactic acid-glycolic acid copolymer, polycaprolactone, polyamide or poly-hydroxybutyric acid; b) 10g of hydroxyapatite nano-particles calculated by 100ml of the organic solvent; and c) 2.5g of gamma-Fe2O3 nano-particles calculated by 100ml of organic solvent, wherein the organic solvent is selected from tetrahydrofuran (THF), dimethylformamide (DMF), dimethylacetamide (DMAc), chloroform or dioxane.
Owner:THE INST OF BASIC MEDICAL SCI OF CHINESE ACAD OF MEDICAL SCI
Magnetic composite microspheres, and preparation method and application thereof
ActiveCN106861570AAchieve thermal protectionHigh activityInorganic material magnetismOn/in organic carrierGlycidyl methacrylateMicrosphere
The invention relates to magnetic composite microspheres, and a preparation method and application thereof, belonging to the technical field of chemical material preparation. The preparation method comprises the following steps: synthesizing Fe3O4@SiO2-MPS (modified polystyrene); mixing, adding acetonitrile, carrying out ultrasonic dispersion, adding isopropyl acrylamide, glycidyl methacrylate, N,N'-methylene-bis acrylamide and azodiisobutyronitrile, mixing, and carrying out oil-bath heating; distilling to obtain part of acetonitrile, and stopping the reaction; carrying out magnetic separation on the obtained, and repeatedly washing with ethanol and water; and drying in a vacuum drying oven to obtain the product. The product is used for cellulase immobilization. The synthesized magnetic composite microspheres have superparamagnetism, can enhance the enzyme activity restorability and heat stability when being used for cellulase immobilization, and implements thermal protection on the cellulase.
Owner:JIANGSU UNIV
Nano-medicinal carrier with magnetocaloric effect as well as preparation method and application thereof
InactiveCN104083765AStrong specificityGood delivery efficiencyInorganic non-active ingredientsNanomedicineAnti cancer drugsNanometre
The invention provides a nano-medicinal carrier with magnetocaloric effect. The nano-medicinal carrier with grain diameter of 50-200 nanometers comprises mesoporous silica particles and Fe3O4 nano-particles embedded inside the mesoporous silica particles, wherein the mesoporous diameter of the mesoporous silica particles is 2-10 nanometers, and the mesoporous channel is in a radial shape from the inner core to outside; the diameter of the Fe3O4 particles is 15-20 nanometers. The invention further provides a preparation method of the nano-medicinal carrier and application of the nano-medicinal carrier in loading anti-cancer medicaments. The nano-medicinal carrier is high in drug storage capacity, and can be used for remarkably improving the anti-cancer drug high-performance transmission efficiency, remarkably improving the curative effect of tumor treatment, and realizing cancer therapy by virtue of medical chemotherapy and magnetocaloric therapy.
Owner:UNIV OF SHANGHAI FOR SCI & TECH
Preparation of super paramagnetic nano particles dispersible in water
InactiveCN1583575AImprove stabilityGood dispersionIron oxides/hydroxidesInorganic material magnetismParamagnetic nanoparticlesSuperparamagnetism
A process for preparing the super-paramagnetic nanoparticles dispersed in water easily includes such steps as mixing the polymer chelating agent with Fe ions, dripping alkali while reacting to generate inn oxide and continuously dripping alkali until pH=9-10.
Owner:SHANGHAI JIAO TONG UNIV
Superparamagnetic nanospheres and preparation method thereof
ActiveCN103730223AHas superparamagnetic propertiesSuperparamagnetic properties haveInorganic material magnetismPeptide preparation methodsColloidSuperparamagnetism
The invention provides superparamagnetic nanospheres and a preparation method of the superparamagnetic nanospheres. Each superparamagnetic nanosphere comprises SiO2 nano-particles, a Fe3O4 layer and a SiO2 layer, wherein the Fe3O4 nano-particles grow in situ to form a shell with the SiO2 nano-particles as the template of the Fe3O4 layer, and the SiO2 layer is deposited on the outer surface of the Fe3O4 layer to form a coating layer. The colloid SiO2 nano-particles are used as the template of each superparamagnetic nanosphere, and thus the size of the SiO2@Fe3O4@SiO2 nanosphere can be adjusted by adjusting the size of the template SiO2 nano-particles. Because the surface of the template SiO2 nano-particles is coated with the Fe3O4 nano-particles in an in-situ growth mode, the load intensity of the superparamagnetic nanospheres is greatly increased, and the synthesis conditions can be simplified. Meanwhile, the outer surfaces of the Fe3O4 layers are coated with the SiO2, the stability of the Fe3O4@SiO2 nanospheres can be obviously improved.
Owner:SHENZHEN INST OF ADVANCED TECH
Method for fast detecting Listeria monocytogenes
ActiveCN105527427AEasy to operateShort detection timeMaterial analysisBacilliQuantitative determination
The invention provides a detection method for fast detecting Listeria monocytogenes. According to the scheme, Fe3O4 / Ru(bqy)3<2+> nanoparticles are subjected to bacterium enriching; a test strip is prepared; sample loading detection is performed. The step of eluting the Listeria monocytogenes from immunomagnetic beads is omitted, so that the capture efficiency is improved; the step of spraying Ru(bqy)3<2+> nanoparticles onto a combining pad is omitted, so that the immunological reaction is more uniform, and the variable coefficient is small during the quantitative determination; the workload and the infectious microbe contamination probability are reduced. The sensitivity of the detection scheme is very high, and the stability is high.
Owner:NANCHANG UNIV
Method for preparing magnetic suspended coding micro-block array chips and method for applying the preparation method
InactiveCN101693514AEasy to prepareMinimizeSemi-permeable membranesDecorative surface effectsBiological macromoleculeSuperparamagnetism
A method for preparing magnetic suspended coding micro-block array chips and a method for applying the preparation method, the preparation method is that firstly, selecting five same silicon sheets, and cleaning and drying the silicon sheets, secondly, coating PMMA glue, thirdly, hot padding, fourthly, utilizing an oxygen plasma body to carry out the reactive ion etching, adjusting the thickness of the glue to be 10-20 nm, fifthly, plating titanium 80-100 nm and gold 50-60 nm through vacuum evaporation, taking the titanium as a gluing and sacrificing layer, sixthly, plating nickel 10-15 nm as a gluing layer through vacuum evaporation, seventhly, plating copper 120-1250 nm through the vacuum evaporation, eighthly, evaporating nickel 30-50 nm through electronic beams, ninthly, plating gold 50-60 nm through vacuum evaporation, tenthly, stripping-off glue, and releasing suspended micro block array ships. The application method is that firstly, cleaning gold blocks, secondly, forming a monomolecular layer on the gold blocks through 11-mercapto carboxylic acid, thirdly, marking the gold blocks through biological macromolecule, fourthly, fluorescence detecting. Chips prepared by the invention have the characteristic of superparamagnetism, thereby conditions are created for biological decoration and biological magnet separation.
Owner:TIANJIN UNIV
Method for rapidly detecting enterobacter sakazakii
The invention provides a method for rapidly detecting enterobacter sakazakii. According to the scheme, the method comprises the steps of enriching Fe3O4 / Ru(bqy)3<2+> nanoparticles with bacteria, preparing test strips, and mounting a sample for detection. By means of the method, the step of eluting enterobacter sakazakii away from immunomagnetic beads is omitted, and capturing efficiency is improved; the step of spraying Ru (bqy) 3<2+> nanoparticles to a binding pad is omitted, an immunology reaction is more uniform, and the variation coefficient generated in the quantitative detection process is small; working load is reduced, and the probability of sundry bacteria contamination is lowered. The detection scheme is quite high in sensitivity and quite good in stability.
Owner:NANCHANG UNIV
Preparation method of composite photocatalytic material of Fe3O4-N doped with Ni/Zn-MOFs/g-C3N4
ActiveCN108579819AImprove photocatalytic activityImprove responseWater/sewage treatment by irradiationWater treatment compoundsSolventUrea
The invention discloses a preparation method of a composite photocatalytic material of porous nano Fe3O4-N doped with Ni / Zn-MOFs / g-C3N4. The method comprises the steps that firstly, urea is calcined to prepare a graphite-phase carbon nitride (g-C3N4) material; then, by adopting ferric chloride, sodium acetate and ethanediamine as raw materials and ethylene glycol as a solvent, a constant-temperature reaction is conducted at 180-220 DEG C for 5-7 h, centrifugal separation is conducted to form solids, and Fe3O4 nano particles with porous structures are obtained; then, zinc nitrate hexahydrate, nickel nitrate hexahydrate, the g-C3N4 material and the Fe3O4 nano particles are added to a mixed solution of N,N-dimethylformamide and ethylene glycol, and a mixed reaction solution is obtained; the mixed reaction solution is transferred to a stainless steel reaction kettle with a polytetrafluoroethylene lining, the temperature is increased to 140-160 DEG C, a constant-temperature reaction is conducted for 5-7 h, centrifugal separation is conducted to form solids, and the composite photocatalytic material of Fe3O4-N doped with Ni / Zn-MOFs / g-C3N4 is obtained. The composite photocatalytic material is of a core-shell structure, g-C3N4 is used as a core, porous nano Fe3O4-N is dispersed on a shell of Ni / Zn-MOFs doped with N, and the material has obvious photocatalytic activity.
Owner:SOUTHWEST PETROLEUM UNIV
Preparing method of magnetic functionalization graphene composite
ActiveCN108022706AImprove conductivityLower internal resistanceMagnetic liquidsDiamagnetic/paramagnetic materialsAlcoholInternal resistance
The invention relates to a preparing method of a magnetic functionalization graphene composite. The method includes the following steps of firstly, evenly mixing graphene microchips and magnetic nanoparticles in a gas flow dispersing mode; secondly, dispersing the mixture in an ethyl alcohol solvent in an ultrasonic dispersing mode; thirdly, adding a silane coupling agent, an additive and maleic-anhydride-grafted polypropylene to be evenly mixed; fourthly, preparing functionalization carbon material powder through a spray drying device; fifthly, sintering the carbon material powder to obtain the magnetic functionalization graphene composite. The composite using graphene and magnetic nanoparticles as the body has the advantages of being good in conductivity, small in internal resistance, uniform in graphene distribution and simple in coating.
Owner:HUNAN INSTITUTE OF ENGINEERING
Method for preparing magnetic particle with level hole structure
InactiveCN104157390AUniform particle sizeUniform shapeMaterial nanotechnologyOrganic/organic-metallic materials magnetismYolkMicrosphere
The invention discloses a method for preparing a magnetic particle with a level hole structure, and belongs to the field of nanometer material synthesis. According to the method, resorcinol and formaldehyde are mixed and stirred to form a carbon source precursor solution; a polymeric particle of a hollow structure is added into the carbon source precursor solution to obtain a phenolic resin-polymer core-shell structure; the phenolic resin-polymer core-shell structure is dispersed into water and is immersed through concentrated sulfuric acid to obtain a particle of the core-shell structure; a saturated ferric chloride solution is added to the boiling water to be boiled, and then is cooled, and ethyl orthosilicate is added to the cooled solution; the particle of the core-shell structure is slowly dripped to the saturated ethyl orthosilicate and ferric chloride solution, and after reaction, a sandwich composite particle made of resin-polymer-magnetic materials is obtained; tetrahydrofuran is used for removing polymer in the obtained composite particle to obtain a resin, magnetic material yolk and eggshell particle; the obtained composite particle is carbonized at the high temperature to obtain a carbon, magnetic material yolk and eggshell particle. According to the method, the adopted raw materials are common chemical materials, cost is low, and the technology is simple.
Owner:UNIV OF SCI & TECH BEIJING
Method for rapidly detecting vibrio parahaemolyticus
ActiveCN105548551AEasy to operateShort detection timeMaterial analysisMicrosphereVibrio parahemolyticus
The invention provides a detection method for rapidly detecting vibrio parahaemolyticus. According to the scheme, bacteria are enriched by Fe3O4 / Ru(bqy) 3<2+> microspheres, a test strip is prepared, and a sample is loaded for detection. The step of eluting the vibrio parahaemolyticus from immunomagnetic beads is eliminated, so that the capturing efficiency is improved; the step of spraying the Fe3O4 / Ru(bqy) 3<2+> microspheres onto a conjugate pad is eliminated, so that immunological reaction is more uniform, and a variation coefficient during quantitative detection is small; the workload and the sundry fungus contamination probability are reduced; the detection scheme is high in sensitivity and stability.
Owner:NANCHANG UNIV
Method for rapidly detecting staphylococcus aureus
The invention provides a method for rapidly detecting staphylococcus aureus. According to the scheme, the method comprises the steps of enriching Fe3O4 / Ru (bqy) 3<2+> nanoparticles with bacteria, preparing test strips, and mounting a sample for detection. By means of the method, the step of eluting staphylococcus aureus away from immunomagnetic beads is omitted, and capturing efficiency is improved; the step of spraying Ru (bqy) 3<2+> nanoparticles to a binding pad is omitted, an immunology reaction is more uniform, and the variation coefficient generated in the quantitative detection process is small; working load is reduced, and the probability of sundry bacteria contamination is lowered. The detection scheme is quite high in sensitivity and quite good in stability.
Owner:江西维邦生物科技有限公司
Method for rapidly detecting salmonella
The invention provides a detection method for rapidly detecting salmonella. According to the scheme, bacteria are enriched by Fe3O4 / Ru(bqy)<2+>3 microspheres, a test strip is prepared, and a sample is loaded for detection. The step of eluting the salmonella from immunomagnetic beads is eliminated, so that the capturing efficiency is improved; the step of spraying the Fe3O4 / Ru(bqy)<2+>3 microspheres onto a conjugate pad is eliminated, so that immunological reaction is more uniform, and a variation coefficient during quantitative detection is small; the workload and the sundry fungus contamination probability are reduced; the detection scheme is high in sensitivity and stability.
Owner:NANCHANG UNIV
Magnetic ZnO/Fe3O4 catalyst as well as preparation method and application thereof
InactiveCN104549306AEasy to prepareRaw materials are cheap and easy to getMetal/metal-oxides/metal-hydroxide catalystsWater/sewage treatment by oxidationFenton reactionPtru catalyst
The invention discloses a magnetic ZnO / Fe3O4 composite catalyst as well as a preparation method and application thereof. The preparation method of the composite catalyst comprises the following steps: under an inert atmosphere, dissolving iron oxide and zinc salt according to the ratio in a solvent, mixing an aqueous solution of sodium borohydride and carrying out reduction reaction and after the reaction is completed, drying the obtained precipitate to obtain the composite catalyst. The deficiencies of the prior art are overcome, the invention provides the magnetic ZnO / Fe3O4 catalyst which has the advantages of simple preparation, cheap raw materials and high catalytic activity and the preparation method thereof. By the catalyst, the removal rate of crystal violet in the Fenton reaction can be obviously increased.
Owner:RENMIN UNIVERSITY OF CHINA
Magnetic fly ash adsorption material as well as preparation method and application thereof
ActiveCN113070025AImprove adsorption capacityThe synthesis method is simpleOther chemical processesAlkali metal oxides/hydroxidesSurface oxidationMetal-organic framework
The invention relates to a magnetic fly ash adsorption material as well as a preparation method and application thereof, and aims to solve the technical problems that the process of preparing magnetic fly ash at present is uncontrollable, and the obtained magnetic fly ash is a ferromagnetic material, does not have magnetic separability and is easy to agglomerate in an adsorption solution, so that the adsorption capacity is greatly reduced. A fly ash material subjected to surface physicochemical modification is used as a carrier, the fly ash / ferric oxide composite material is obtained through controllable growth and pyrolysis conversion of a metal organic framework material (MOFs), ferric oxide in the composite material is assembled and arranged on the surface of fly ash through interaction among particles, and the total radial thickness of a ferric oxide assembly is 50 to 80 nanometers. The synthesis method is simple and good in controllability, and the prepared magnetic fly ash adsorption material is clear in structure and excellent in performance, has superparamagnetic characteristics, can ensure the dispersity of the material in the adsorption process, has double characteristics of adsorption and magnetic separation, and can be applied to the field of water pollution control.
Owner:SHANXI UNIV
A kind of nano-medicine carrier with magnetocaloric and photothermal effect and preparation method thereof
ActiveCN105997944BFacilitated releaseSuitable for storageOrganic active ingredientsEnergy modified materialsSilicic acidMesoporous silica
The invention discloses a nano-drug carrier with the magnetothermal and photothermal effects. The particle size is 50 nanometers to 300 nanometers, and the nano-drug carrier is prepared from mesoporous silica particles, Fe3O4 nanoparticles embedded into the mesoporous silica particles and graphene oxide with which the surfaces of the mesoporous silica particles are coated. The invention further provides a preparation method of the nano-drug carrier. The superparamagnetic Fe3O4 nanoparticles are prepared through a solvothermal method, the Fe3O4 nanoparticles are composited by taking hexadecyl trimethyl ammonium bromide as a structure-directing agent and taking tetraethoxysilane as a silicon source through the sol-gel self-assembling process, and then magnetic mesoporous nanoparticles Fe3O4 / mSiO2 with the magnetic property adjustable and controllable are prepared; the surfaces of the Fe3O4 / mSiO2 mesoporous nanoparticles are coated with graphene through the ion interaction or electrostatic interaction or hydrogen-bond interaction, and then the nano-drug carrier which both can efficiently deliver anti-cancer drugs and has the magnetothermal and photothermal effects is obtained. Accordingly, cancer treatment in which medical chemotherapy cooperates with magnetothermal and photothermal treatment can be achieved.
Owner:UNIV OF SHANGHAI FOR SCI & TECH
A method for rapid detection of Escherichia coli o157:h7
The invention provides a detection method for fast detecting colon bacillus O157:H7. According to the scheme, Fe3O4 / Ru(bqy)3<2+> nanoparticles are subjected to bacterium enriching; a test strip is prepared; sample loading detection is performed. The step of eluting the colon bacillus O157:H7 from immunomagnetic beads is omitted, so that the capture efficiency is improved; the step of spraying Ru(bqy)3<2+> nanoparticles onto a combining pad is omitted, so that the immunological reaction is more uniform, and the variable coefficient is small during the quantitative determination; the workload and the infectious microbe contamination probability are reduced. The sensitivity of the detection scheme is very high, and the stability is high.
Owner:NANCHANG UNIV
Ferromagnetic microsphere medium made from urea-formaldehyde resin and its preparation method
Owner:TIANJIN UNIV
Miniature magnetic capacitance sensor device based on magnetic aggregator and nano magnetic particle composite material
ActiveCN108469592AHas superparamagnetic propertiesHysteresis-freeMagnitude/direction of magnetic fieldsSoi substrateMetal electrodes
The invention discloses a miniature magnetic capacitance sensor device based on a magnetic aggregator and a nano magnetic particle composite material. The miniature magnetic capacitance sensor deviceis composed of an SOI substrate, two magnetic field aggregators, a magnetic-nano-particle-composite-mateiral-based magnetic capacitance sensitive unit, a left metal electrode plate and a right metal electrode plate. The two magnetic field aggregators and the magnetic-nano-particle-composite-mateiral-based magnetic capacitance sensitive unit are arranged on a SiO2 surface after patterning on a toplow-resistant Si part of the SOI substrate; the two magnetic field aggregators are arranged in a left-right symmetric manner; and the magnetic-nano-particle-composite-mateiral-based magnetic capacitance sensitive unit is arranged at the gap between the two magnetic field aggregators. The magnetic nano-particle composite material is made from superparamagnetic nano particles and high-molecular polymer. The left metal electrode plate and the right metal electrode plate are spaced between the magnetic field aggregators and the magnetic-nano-particle-composite-mateiral-based magnetic capacitance sensitive unit. The miniature magnetic capacitance sensor device is suitable for magnetic field measurement on various occasions, especially for magnetic field measurement in high dynamic magnetic field application environments like the deep space, the deep sea, and the deep ground.
Owner:ZHONGBEI UNIV
Preparation method of pH (potential of hydrogen)/reduction response cascade release magnetic targeting drug carrier with core-shell structure
InactiveCN107412197ASpecific releaseAchieve specific releaseOrganic active ingredientsInorganic non-active ingredientsSide effectMagnetite Nanoparticles
The invention relates to a preparation method of a pH (potential of hydrogen) / reduction response cascade release magnetic targeting drug carrier with a core-shell structure. Firstly, Dex-SS-NH2 and Dex-COOH and SPION-COOH are synthesized, secondly, the Dex-SS-NH2 and the SPION-COOH are combined with anti-cancer drugs such as DOX*HCl to obtain magnetic nanoparticles with reduction responsiveness, and the magnetic nanoparticles serve as a core and are subjected to electrostatic self-assembly with the Dex-COOH to obtain pH / reduction double-responsiveness drug carrying nanoparticles. The nanoparticles have good biocompatibility and superparamagetism, can stimulate responsiveness release under pH / reduction double action, improve curative effects, reduce toxic and side effects and have a wide application prospect in the field of biomedicine.
Owner:WUHAN INSTITUTE OF TECHNOLOGY
Superparamagnetic nanosphere and preparation method thereof
ActiveCN103730223BHas superparamagnetic propertiesSuperparamagnetic properties haveInorganic material magnetismPeptide preparation methodsSio2 nanoparticleSuperparamagnetism
The invention provides a superparamagnetic nanosphere and a preparation method thereof, comprising SiO2 nanoparticles, a Fe3O4 layer and a SiO2 layer, the Fe3O4 layer uses SiO2 nanoparticles as a template to form a shell layer by in-situ growth of Fe3O4 nanoparticles, and the SiO2 layer is deposited on the outer surface of the Fe3O4 layer to form a cladding layer. The superparamagnetic nanospheres use colloidal SiO2 nanoparticles as templates, so that the size of SiO2@Fe3O4@SiO2 nanospheres can be adjusted by changing the size of template SiO2 nanoparticles; by in-situ growth on the surface of template SiO2 nanoparticles Coating Fe3O4 nanoparticles by means of a method greatly increases their loading density and simplifies the synthesis conditions. At the same time, the stability of Fe3O4@SiO2 nanospheres can be significantly improved by coating the outer surface of Fe3O4 layer with SiO2.
Owner:SHENZHEN INST OF ADVANCED TECH
A method for preparing gold-coated nano-magnetic particles for preparing magnetic liquids
InactiveCN101789296BGuaranteed uniformityHigh magnetizationMagnetic liquidsGold particlesMagnetite Nanoparticles
A method for preparing gold-coated nano-magnetic particles for preparing magnetic liquids, the method comprising: chloroauric acid and sodium citrate at a mass ratio of ferric oxide nano-magnetic particles to chloroauric acid of 1:10 to 1:0.5 The mass ratio of 1:36.9~1:7.4 or the mass ratio of chloroauric acid and hydroxylamine hydrochloride 1:5.6~1:2 is weighed and prepared; the solution is made according to the weighed chloroauric acid, hydroxylamine hydrochloride and sodium citrate. Dissolve ferric oxide nano-magnetic particles in absolute ethanol and disperse completely by ultrasonic. Add 3-aminopropyltriethoxysilane and iron ferric oxide nano-magnetic particles, the ratio of volume to mass is 1:1-4:1, and continue to sonicate. Add the configured chloroauric acid solution and ultrasonicate for 1h. Adding sodium citrate solution and hydroxylamine hydrochloride solution, ultrasonication for 6 hours, separation, washing, ultrasonic cleaning with dilute hydrochloric acid for 1 hour, separation and drying, to prepare gold-coated nano-magnetic particles. The corrosion resistance of magnetic fluids prepared from gold-coated particles is enhanced.
Owner:BEIJING JIAOTONG UNIV
a fe 3 o 4 -n-doped ni/zn-mofs/g-c 3 n 4 Preparation method of composite photocatalytic material
ActiveCN108579819BUnique in natureReduce reunionWater/sewage treatment by irradiationWater treatment compoundsSodium acetateHydration reaction
The invention discloses a porous nano Fe 3 O 4 ‑N-doped Ni / Zn‑MOFs / g‑C 3 N 4 The method for preparing composite photocatalytic materials is to first calcine urea to obtain graphite phase nitrogen carbide g‑C. 3 N 4 Materials; then use ferric chloride, sodium acetate, and ethylenediamine as raw materials, ethylene glycol as solvent, react at a constant temperature of 180-220°C for 5-7 hours, and centrifuge to separate the solid matter to obtain Fe with a porous structure. 3 O 4 Nanoparticles; secondly, zinc nitrate hexahydrate, nickel nitrate hexahydrate, g‑C 3 N 4 Material, Fe 3 O 4 Add the nanoparticles to the mixture of N,N-dimethylformamide and ethylene glycol to obtain a mixed reaction liquid; transfer the mixed reaction liquid to a stainless steel reactor lined with polytetrafluoroethylene and heat it to 140- React at a constant temperature of 160°C for 5-7 hours, then centrifuge to separate the solid matter to obtain Fe 3 O 4 / N-doped Ni / Zn‑MOFs / g‑C 3 N 4 Composite photocatalytic materials. The composite photocatalytic material obtained by the present invention has a core-shell structure, g-C 3 N 4 as core, porous nano-Fe 3 O 4 Dispersed on N-doped Ni / Zn‑MOFs shell, it has significant photocatalytic activity.
Owner:SOUTHWEST PETROLEUM UNIV
A kind of preparation method of micron superparamagnetic ferric oxide microsphere
InactiveCN104843802BHas superparamagnetic propertiesRaw materials are easy to getFerroso-ferric oxidesNanoparticleMicrosphere
Owner:HENAN UNIVERSITY
A method for rapid detection of Vibrio parahaemolyticus
ActiveCN105548551BEasy to operateShort detection timeMaterial analysisVibrio parahemolyticusMicrosphere
The invention provides a detection method for rapidly detecting vibrio parahaemolyticus. According to the scheme, bacteria are enriched by Fe3O4 / Ru(bqy) 3<2+> microspheres, a test strip is prepared, and a sample is loaded for detection. The step of eluting the vibrio parahaemolyticus from immunomagnetic beads is eliminated, so that the capturing efficiency is improved; the step of spraying the Fe3O4 / Ru(bqy) 3<2+> microspheres onto a conjugate pad is eliminated, so that immunological reaction is more uniform, and a variation coefficient during quantitative detection is small; the workload and the sundry fungus contamination probability are reduced; the detection scheme is high in sensitivity and stability.
Owner:NANCHANG UNIV
An in situ preparation of superparamagnetic Fe by atomic layer deposition 3 o 4 nanotube array method
InactiveCN104630742BUniform thicknessUniform compositionNanotechnologyChemical vapor deposition coatingThin membraneNitrogen atmosphere
The invention discloses a method for in-situ preparing super-paramagnetic Fe3O4 nanotube arrays by atomic layer deposition, and belongs to the technical field of preparation of nanotube arrays. The method comprises the following steps: 1) conveying a clean AAO (Anodic Aluminum Oxide) substrate into an atomic layer deposition device for later use; 2) charging ferrocene steam and oxygen into a gas carrying system of the atomic layer deposition device, conveying into a vacuum reaction cavity through the gas carrying system, starting atomic layer deposition circulation under the nitrogen atmosphere, and repeating the circulation until uniform Fe3O4 films are generated on the surface and holes of the AAO substrate; 3) polishing to remove the Fe3O4 film on the surface of the AAO substrate; 4) dissolving to remove the AAO substrate through aqueous alkali to obtain orderly-arranged Fe3O4 nanotube arrays. The method is simple to operate, wide in raw material source, and easy to be achieved; the super-paramagnetic Fe3O4 nanotube arrays which are very large in aspect ratio, are orderly arranged and are very uniform in shape and size can be obtained by in-situ growth.
Owner:XI AN JIAOTONG UNIV
A kind of magnetic composite microsphere and its preparation method and application
ActiveCN106861570BAchieve thermal protectionHigh activityInorganic material magnetismOn/in organic carrierPolymer scienceMeth-
The invention relates to magnetic composite microspheres, and a preparation method and application thereof, belonging to the technical field of chemical material preparation. The preparation method comprises the following steps: synthesizing Fe3O4@SiO2-MPS (modified polystyrene); mixing, adding acetonitrile, carrying out ultrasonic dispersion, adding isopropyl acrylamide, glycidyl methacrylate, N,N'-methylene-bis acrylamide and azodiisobutyronitrile, mixing, and carrying out oil-bath heating; distilling to obtain part of acetonitrile, and stopping the reaction; carrying out magnetic separation on the obtained, and repeatedly washing with ethanol and water; and drying in a vacuum drying oven to obtain the product. The product is used for cellulase immobilization. The synthesized magnetic composite microspheres have superparamagnetism, can enhance the enzyme activity restorability and heat stability when being used for cellulase immobilization, and implements thermal protection on the cellulase.
Owner:JIANGSU UNIV
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