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48results about How to "Fast magnetic separation" patented technology
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Method for preparing lysozyme molecular imprinting nano particles with magnetic responsiveness and extremely high adsorption capacity
InactiveCN102145279AImprove adsorption capacityReduce pollutionOther chemical processesEnzymesCross-linkFunctional monomer
The invention provides a method for preparing lysozyme molecular imprinting nano particles with magnetic responsiveness and extremely high adsorption capacity. In the method, lysozymes are used as template molecules. The method comprises the following steps of: carrying out template polymerization under the conditions that suitable functional monomers, a cross-linking agent and an initiator and magnetic nano particles the surfaces which are coated with SiO2 and are modified by sulfydryl and acryloyloxy exist; and washing out the template molecules to obtain the lysozyme molecular imprinting nano particles with magnetic responsiveness and high adsorption capacity. The invention also provides a method for preparing the nano particles. The lysozyme molecular imprinting nano particles prepared by adopting the method disclosed by the invention have the characteristics of high adsorption capacity, simpleness for preparation, low cost, strong specific absorption, high physical, chemical stability, capability of being recycled repeatedly and the like.
Owner:HUAZHONG UNIV OF SCI & TECH
Preparation method of hydrophilic magnetic halloysite surface molecularly-imprinted nano composite material
InactiveCN103509161AUniform sizeEvenly distributedOther chemical processesWater contaminantsHalloysitePolymer science
The invention relates to a preparation method of a hydrophilic magnetic halloysite surface molecularly-imprinted nano composite material and belongs to the technical field of preparation of an environment functional material. Magnetic halloysite is synthesized by an impregnation method and a high temperature reducing method, and magnetic nano particles have a uniform size and are uniformly distributed; an initiator is grafted to the surface of the magnetic halloysite by the surface amination and amidation reaction and a molecularly-imprinted polymerization layer grafted to the surface of the magnetic halloysite is controlled in the nanoscale by surface atom transfer radical polymerization; due to existence of a tail-end ATRP (atom transfer radical polymerization) active group, the hydrophilic magnetic halloysite surface molecularly-imprinted nano composite material is successfully grafted with a hydrophilic polymer brush, is successfully applied to high-efficiency selective removal and rapid magnetic separation of sulfamethazine in the water environment and has excellent regenerability.
Owner:JIANGSU UNIV
Magnetic composite hydroxyapatite nanoparticles as well as preparation method and application thereof
ActiveCN104549127AImprove acid resistanceEfficient removalOther chemical processesAlkali metal oxides/hydroxidesMagnetic responsePollution
The invention discloses magnetic composite hydroxyapatite nanoparticles. The magnetic composite hydroxyapatite nanoparticles are composed of Fe3O4 nanoparticles and hydroxyapatite nanoparticles, wherein the molar ratio of the Fe3O4 to the hydroxyapatite is (1-10): 1; the magnetic composite hydroxyapatite nanoparticles are spherical aggregate or agglomerate in which the Fe3O4 nanoparticles and the hydroxyapatite nanoparticles are distributed evenly and alternately. The preparation method of the magnetic composite hydroxyapatite nanoparticles is simple; the nanoparticles are capable of efficiently removing heavy metal ions in sewage, and in the later treatment period, quick magnetic separation can be realized; the nanoparticles have the adsorbing capacity of 440mg / g to lead ions, the adsorbing capacity of 238mg / g to cadmium ions, the adsorbing capacity of 139mg / g to zinc ions and the adsorbing capacity of 135mg / g to copper ions in the sewage; the magnetic composite hydroxyapatite nanoparticles have a rapid magnetic response characteristic, and are capable of realizing rapid solid-liquid separation with an external magnetic field, and the separation process is high in separation efficiency, and simple and efficient to operate; and besides, the nanoparticles are not residual in water and do not cause secondary pollution to the water and the environment.
Owner:NINGBO UNIV
Copper doped composite magnetic nano-material and preparation and application thereof
ActiveCN104437344ASmall sizeLarge specific surface areaOther chemical processesWater contaminantsMicrosphereMagnetite Nanoparticles
The invention discloses a copper doped composite magnetic nano-material and preparation and an application of the copper doped composite magnetic nano-material, and belongs to the fields of magnetic particle synthesis and water treatment research. Aiming at a solvent thermal synthesis process of magnetic nanoparticles, according to the invention, copper chloride and ferric chloride are taken as metal salt precursors, based on solvent thermal reaction, and through copper doping ratio adjustment, the obtained mesoporous Cu-Fe3O4 microspheres have controllable particle size (560nm-120nm), specific surface area (40-100m2 g-1) and surface charge amount, and have the characteristics of high monodispersity, uniform size, high magnetic property (130-65emu g-1) and the like, and show excellent adsorption and regenerative adsorption properties for pentavalent arsenic and trivalent arsenic in a water body. The mesoporous Cu-Fe3O4 microspheres are simple in preparation process, low in cost and high in arsenic adsorption property, can be quickly magnetically separated, and has a good application prospect.
Owner:CENT SOUTH UNIV
Preparation method of visible-light-driven photocatalyst Fe3O4@PDA@Ag composite microsphere
ActiveCN107442178AHigh reuse rateAvoid secondary pollutionWater/sewage treatment by irradiationWater treatment compoundsSodium acetateWater baths
The invention belongs to the technical field of photocatalysts and specifically relates to a preparation method of a visible-light-driven photocatalyst Fe3O4@PDA@Ag composite microsphere. The preparation method comprises step 1 of respectively dissolving ferric chloride hexahydrate and sodium acetate into equivalent ethylene glycol, then evenly mixing and stirring two solutions, adding a 10 to 30wt% polyacrylic acid solution to continue stirring for 6 to 12h, putting into a reaction kettle, heating to 180 to 210 DEG C and keeping reaction for 4 to 12h to obtain a black product of ferroferric oxide; step 2 of dispersing the ferroferric oxide into an ethanol solution of polyvinyl pyrrolidone, then adding a water solution of dopamine hydrochloride, performing water bath and fully and ultrasonically dispersing to obtain a mixed solution b; step 3 of dropwise adding ammonium hydroxide into the mixed solution b, continuing ultrasonic reaction for 2 to 5 hours to obtain Fe3O4@PDA composite microspheres; step 4 of adding the prepared Fe3O4@PDA composite microspheres into ammonium hydroxide and silver nitrate to be prepared into a tollens' reagent, putting in a table concentrator to be vibrated for 8 to 16hours, performing magnetic separation and performing aftertreatment to obtain the Fe3O4@PDA@Ag composite microspheres. The Fe3O4@PDA@Ag composite microspheres have an obvious effect on degrading methyl orange and can be used repeatedly.
Owner:ZHEJIANG SCI-TECH UNIV
Molecular bottle brush type reverse phase adsorbent as well as preparation method and application thereof
InactiveCN107376867ASynthesis conditions are simpleReduce consumptionOther chemical processesWater contaminants(Hydroxyethyl)methacrylateAtom-transfer radical-polymerization
The invention discloses a molecular bottle brush type reverse phase adsorbent and a preparation method thereof. The molecular bottle brush type reverse phase adsorbing material is obtained by taking hydroxyethyl methacrylate containing an ethylenic bond and styrene as monomers and sequentially polymerizing on the surface of dopamine-coated magnetic graphene through an atom transfer radical polymerization (ATRP) method. A separating material disclosed by the invention has the characteristics of high adsorption capacity and long service life, and can be used for enriching and quantitatively analyzing bisphenol A in environmental water, so that the separating and enriching efficiency of the bisphenol A can be greatly improved.
Owner:NORTHWEST UNIV(CN)
Magnetic separation device and method for reducing hematite-containing material by utilizing microwave
The invention relates to a device and a method for reducing hematite-containing materials by utilizing microwave heat treatment and carrying out magnetic separation. The device comprises a material bin, a screw feeder, a star type feeding machine, a preheating reacting furnace and a microwave magnetic separator. When the magnetic separation is carried out, the materials are crushed and then added to the material bin, powdery materials enter the preheating reacting furnace through the screw feeder and the star type feeding machine for preheating, and the preheated powdery materials enter the microwave magnetic separator through an air inlet pipe for the microwave heat treatment and the magnetic separation; products subjected to the magnetic separation are discharged through an ore discharge pipe from a discharge port, and other materials are discharged through an outlet pipe from the discharge port. The device disclosed by the invention can be used for reducing the weak magnetic Fe2O3 contained in the materials into strong magnetic Fe3O4 through the microwave heating and separating the iron ore concentrates through the magnetic separation, integrally and simultaneously carries out the reduction and the magnetic separation, has the advantages of small investment, low energy consumption, large treatment quantity, water saving, no air pollution, wide application range and relatively popularization prospect, is simple in equipment, and can be used for treating multiple hematite-containing materials which include ores, such as steel slag, low-grade limonite and iron ores.
Owner:INNER MONGOLIA UNIV OF SCI & TECH
A method for preparing aminated magnetic chitosan
InactiveCN109550485ALarge specific surface areaRich porous structureOther chemical processesWater contaminantsIon exchangeMagnetite Nanoparticles
A method for preparing aminated magnetic chitosan is disclosed. The method includes covering magnetic nanoparticles with chitosan to prepare magnetic chitosan which can be separated in a magnetic manner; forming a polydopamine modification layer on the surface of the magnetic chitosan by utilizing adhesive force of the polydopamine; and then performing addition and condensation to graft polyethyleneimine to the magnetic chitosan surface modified with the polydopamine to obtain the aminated magnetic chitosan. The prepared aminated magnetic chitosan has higher adsorption performance and adsorption selectivity for cadmium in water, can achieve rapid magnetic separation, can be recycled and reused, and solves a problem that conventional ion exchange, precipitation and other unit techniques don't have ideal cleaning effects. The method has mild reaction conditions, and can avoid environment pollution caused by organic solvents, reaction conditions and a modification process are easy to control and the method is suitable for industrial production.
Owner:ZHEJIANG OCEAN UNIV
Magnetic layered double hydroxide-metal organic framework composite material as well as preparation method and application thereof
ActiveCN112108120AQuick checkoutImprove extraction efficiencyIon-exchange process apparatusOther chemical processesMilk sampleChemical compound
The invention provides a magnetic layered double hydroxide-metal organic framework composite material as well as a preparation method and application thereof, belonging to the technical field of composite materials. The structure of the magnetic layered double hydroxide-metal organic framework composite material is Fe3O4@ZnAl-LDH / ZIF-8. The preparation method comprises the following steps: preparing Fe3O4@ZnAl-LDH by adopting a coprecipitation method, and generating ZIF in situ on the surface of Fe3O4@ZnAlLDH by adopting a solvothermal method to prepare the Fe3O4@ZnAl-LDH / ZIF-8 composite material. The magnetic layered double hydroxide metal-organic framework composite material is applied to the field of micro-extraction, so rapid magnetic separation can be achieved, the magnetic layered double hydroxide metal-organic framework composite material can be recycled, extraction time is shortened, and experiment cost is reduced. Meanwhile, through hybrid ZIF-8, the specific surface area of ZnAl-LDH is increased, and the extraction efficiency of ZnAl-LDH on a target compound is greatly improved. The composite material can sensitively, simply, conveniently and quickly detect target components, can meet analysis requirements on EDCs in milk samples, and also shows good application potential in the aspect of trace organic pollutant analysis and determination.
Owner:NINGXIA MEDICAL UNIV
Preparation method of porous chitosan
InactiveCN103657601AGood water solubilityImprove adsorption capacityOther chemical processesWater/sewage treatment by sorptionPeristaltic pumpFreeze-drying
The invention discloses a preparation method of porous chitosan. The preparation method comprises the following steps: ultrasonically dispersing Fe3O4 nanoparticles into de-ionized water, adding ZrOCl2, fully mixing, heating, reacting to generate ZrO2 / Fe3O4 compound metal oxide nanospheres, adding into chitosan, dissolving in a 4% acetic acid solution to form sol-gel, dropwise filling 2 mol / L of a NaOH solution with the sol-gel through a peristaltic pump to form monodisperse microspheres, and performing freeze-drying to form a porous chitosan microsphere-loaded ZrO2 / Fe3O4 metal oxide. An adsorbent in the method is easy to prepare, convenient to operate, low in cost, remarkable in treatment effect and good in reproducibility, and can be quickly subjected to magnetic separation.
Owner:CILIN & CAS ENVIRONMENTAL TECH ANHUIINC
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 detecting prostate cancer exosome based on Fe3O4@ SiO2@ TiO2 nanoparticle enrichment and PSMA sensor
PendingCN112129939AFirmly connectedEasy to separateFluorescence/phosphorescenceProstate cancer cellOncology
The invention discloses a method for detecting prostate cancer exosome based on Fe3O4@ SiO2@ TiO2 nanoparticle enrichment and a PSMA sensor. The method comprises the following steps of: enriching exosome by adopting Fe3O4@ SiO2@ TiO2 nanoparticles, and then constructing a hairpin-shaped PSMA aptamer sensor to quantify the exosome by measuring the change of fluorescence intensity. By utilizing thedetection method, the exosome of prostate cancer cells can be successfully distinguished from the exosome of normal prostate cells, and the detection limit is 9 * 10 <3> exosomes / microliter. The method is used for clinical prostate cancer patient serum samples and normal human serum samples, can quickly and accurately detect prostate cancer patients, and is verified by a traditional ELISA method. The exosome enrichment method is simple and quick, the enrichment efficiency is high, exosome enrichment can be completed within 8 minutes, and the enrichment efficiency is 91.5%. The sensitivity ishigh, the specificity is high, the detection limit is 9 * 10 <3> exosomes / microliter, and clinical prostate cancer patients and healthy people can be remarkably distinguished.
Owner:NINGBO UNIV
Method for detecting ofloxacin in milk by combination of magnetic solid-phase microextraction and carbon quantum dot fluorescence sensibilization
ActiveCN107688011ASignificant fluorescence sensitizationHigh sensitivityNanoopticsFluorescence/phosphorescenceSolid-phase microextractionPhenol
The invention discloses a method for detecting ofloxacin in milk by combination of magnetic solid-phase microextraction and carbon quantum dot fluorescence sensibilization. According to the method, polyethylenimine is utilized as a carbon source and a nitrogen source, and nitrogen doped fluorescent carbon quantum dots are synthesized by a hydrothermal method; ferroferric oxide magnetic nano particles modified by 2-(5-bromine-pyridine azo)-5-diethylamino phenol and lauryl sodium sulfate are utilized as a milk purifying material, the ofloxacin can enhance fluorescence of the nitrogen doped fluorescent carbon quantum dots, the strength of a fluorescent signal enhanced by the ofloxacin and the concentration of the ofloxacin have a certain linear relation, and a fluorescence spectrophotometry for detecting the ofloxacin can be established based on the certain linear relation. The nitrogen doped fluorescent carbon quantum dots prepared by the method disclosed by the invention have a remarkable fluorescence sensibilization effect and strong selectivity; the magnetic nano particles have a better purifying effect and can eliminate matrix interference; the method can be applied to fluorescence measurement of the ofloxacin and has the characteristics of high flexibility and specificity.
Owner:KUNMING UNIV OF SCI & TECH
Special RO-phase magnetic separator for steel slag micro powder
InactiveCN104841554AIncreased activity indexMeet quality requirementsDirt cleaningMagnetic separationSlagMagnetic separator
The invention discloses a special RO-phase magnetic separator for steel slag micro powder. The special RO-phase magnetic separator comprises a separation cavity, an RO-phase collecting cavity and a magnetic bar component, wherein the RO-phase collecting cavity is formed in one side of the separation cavity and is a half-sealed cavity; an RO-phase discharge hole is formed in the lower part of the RO-phase collecting cavity; a plurality of groups of windows are arranged between the RO-phase collecting cavity and the separation cavity; the magnetic bar component penetrates through the windows, spans between the two cavities and is used for communicating the two cavities; the magnetic bar component structurally comprises a cylinder, a magnetic system shaft, a magnetic block, a chain wheel and a bearing. When the equipment is additionally arranged on an air tube, the RO-phase in the steel slag micro powder can be effectively adsorbed and separated, and the content of inert substances in the steel slag micro powder after RO-phase separation can be reduced to within 15% from about 35% at present.
Owner:山东省建筑材料工业设计研究院 +1
Method for detecting fluoroquinolones medicine based on magnetic nano material purification-carbon quantum dot fluorescence sensibilization
ActiveCN107688010AHigh quantum yieldDifferent degrees of fluorescence sensitizationComponent separationFluorescence/phosphorescenceDispersitySolid-phase microextraction
The invention discloses a method for detecting fluoroquinolones medicine based on magnetic nano material purification-carbon quantum dot fluorescence sensibilization. According to the method, a magnetic nano material is utilized as a purifying material, and a milk matrix is purified by magnetic solid phase microextraction; poly(4-styrene sulfonic acid-co-maleic acid)sodium salt is utilized as a carbon source and a sulfur source, a sulfur-doped fluorescent carbon quantum dot having a fluorescence sensibilization effect on the fluoroquinolones medicine is synthesized by a hydrothermal method, and the strength of a fluorescent signal enhanced by the sulfur-doped fluorescent carbon quantum dot has a certain linear relation with a concentration of the fluoroquinolones medicine; thus, a high-efficiency liquid chromatography for detecting the fluoroquinolones medicine is established. The prepared magnetic nano material has excellent dispersity and a better purification effect and eliminates interference of complex matrixes; furthermore, the sulfur-doped fluorescent carbon quantum dot has different degrees of fluorescence sensibilization effects on the fluoroquinolones medicine, and the high-efficiency liquid chromatography can be utilized to measure varieties of fluoroquinolones medicine at the same time. The method disclosed by the invention has the remarkable characteristics of highsensitivity, good repeatability and the like.
Owner:KUNMING UNIV OF SCI & TECH
Method for detecting CTCs by multi-antibody immunomagnetic bead enrichment
PendingCN110456076AImprove detection of defectsStrong enrichment abilityBiological testingMagnetic beadFluorescence
The invention relates to a method for detecting CTCs by multi-antibody immunomagnetic bead enrichment. The method comprises specific steps as follows: 1, coupling an anti-EpCAM monoclonal antibody with magnetic beads; 2 preparing a circulating tumor cell sample: adding a proper quantity of immunomagnetic beads to a biological tumor cell sample, performing uniform mixing, then, performing separation by a magnetic separator and PBS cleaning, suspending magnetic bead adsorbed cells in a PBS for cell counting, and detecting enriched cells by a cell counting plate; adding a proper quantity of nanoimmunomagnetic beads to an artificial tumor cell blood sample for magnetic separation, performing PBS cleaning, and then, suspending magnetic bead adsorbed cells in the PBS again; taking the sample, dropwise adding the sample to a glass slide, performing incubation by FICT, detecting enriched cells by a flow cytometer, and identifying effectiveness by tumor cell-fluorescence labeling EPCAM. Counting is performed under a fluorescence inverted microscope, and enrichment and identification of tumor cell line cells mixed with peripheral blood are the same as above. The sensitivity and specificityof circulating tumor cell detection are greatly improved.
Owner:济南红枫叶生物科技有限公司
Preparation method of monodisperse magnetic polystyrene microspheres, microspheres and application thereof
PendingCN113278194ALess usableLess wastePeptide preparation methodsCoatingsInorganic saltsMicrosphere
The invention discloses a preparation method of monodisperse magnetic polystyrene microspheres, microspheres prepared by the preparation method and application of the microspheres. The preparation method comprises the following steps that: seed microspheres are prepared by a solution polymerization method; porous crosslinked polystyrene microspheres are prepared by swelling polymerization; nitro porous crosslinked polystyrene microspheres are prepared under acidic conditions; finally, through an in-situ reaction, the microspheres in the previous step is mixed with inorganic salt with ferrous ions, an initiator and ammonia water for reaction, and performing centrifugal cleaning to obtain the monodisperse magnetic polystyrene microspheres. In the preparation process, the usage amount of an organic reagent and the amount of wastes are less than those in the prior art; and the prepared magnetic polystyrene microspheres have the advantages of monodispersity, low sedimentation rate, high magnetic separation speed and mild separation conditions.
Owner:SUZHOU ENRICHING BIOTECH CO LTD
Magnetic core-shell hydrogenation catalyst and method for preparing 2, 2, 4, 4-tetramethyl-1,3-cyclobutanediol
ActiveCN112023939AFast hydrogenationImprove conversion rateOrganic compound preparationOrganic-compounds/hydrides/coordination-complexes catalystsPtru catalystOrganic chemistry
The invention relates to the field of catalyst preparation, and discloses a magnetic core-shell hydrogenation catalyst and a method for preparing 2, 2, 4, 4-tetramethyl-1,3-cyclobutanediol, the catalyst is represented as Fe3O4 (at) S / M; wherein Fe3O4 is a core layer, S is a shell layer carrier, and M is a main active metal and / or an auxiliary metal loaded on the shell layer carrier; the active metal is one or more of Ru, Ni, Ir, Pd and Pt, and the loading capacity is 1-50 wt% of the catalyst; wherein the auxiliary metal is one or more of Cu, Fe, Co, Zn and Sn, and the molar ratio of the auxiliary metal to the main active metal is 0.1-10: 1. The catalyst has the following advantages: 1, the hydrogenation speed is high; (2) the catalyst has high conversion rate on raw materials and high selectivity on target products; (3) strong magnetism is achieved, rapid magnetic separation can be achieved, and filtering separation is not needed;.
Owner:ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD +1
Functional magnetic material for selective separation of pepsase and application of functional magnetic material
InactiveCN111057185AGood biocompatibilityGood dispersionOther chemical processesInductances/transformers/magnets manufactureFunctional monomerTriethoxysilane
The invention relates to a functional magnetic material for selective separation of pepsase, wherein the functional magnetic material is prepared by the following preparation steps: preparing ferroferric oxide particles, namely preparing silicon dioxide-coated ferroferric oxide particles by using tetraethoxysilane as a silicon source; adding functional monomers containing glycosyl and positive charges into an aqueous solution, freely polymerizing with allyl triethoxysilane in the presence of an initiator, introducing nitrogen into the mixed solution to remove oxygen, and carrying out a reaction at normal temperature; after the polymerization is finished, adding ferroferric oxide coated with silicon dioxide, and carrying out a reaction in a water bath; and washing the obtained material withdistilled water, and drying to obtain the material. The functional magnetic material disclosed by the invention is good in biocompatibility and good in dispersity; the material has the advantages ofuniform particle size, strong adsorption performance on pepsase, stable performance, realization of repeated use, repeated use for at least six times, realization of the separation of pepsase after the material is placed in a room temperature dry environment for half a year, great saving of the use production cost, and wide application prospect.
Owner:TIANJIN UNIV OF SCI & TECH
Preparation of magnetic core-shell conductive polymer loaded nanogold catalyst and application of magnetic core-shell conductive polymer loaded nanogold catalyst in p-nitrophenol hydrogenation
ActiveCN111215152AHigh catalytic activityEasy to useOrganic compound preparationOrganic-compounds/hydrides/coordination-complexes catalystsPolymer sciencePtru catalyst
The invention provides preparation of a magnetic core-shell conductive polymer loaded nanogold catalyst and application of the magnetic core-shell conductive polymer loaded nanogold catalyst in p-nitrophenol hydrogenation. The preparation method comprises the following steps of: preparing a Fe3O4 / conductive polymer core-shell material by an in-situ polymerization method, and pretreating the Fe3O4 / conductive polymer core-shell material; taking the pretreated composite material as a carrier of the nanogold catalyst, and stabilizing the nanogold particles by adopting a conductive polymer. The prepared nanogold catalyst has excellent catalytic activity when applied to a reaction for preparing p-aminophenol through catalytic hydrogenation of p-nitrophenol at room temperature, and the recyclingperformance of the catalyst is stable. The method is of great significance to catalyst preparation and synthesis. The series of catalysts can realize fine regulation and control of nano-surface gold species electrons and controllable synthesis of catalyst gold active sites, and the method is simple in synthesis and low in cost, and the catalyst is easy to separate, excellent in catalytic activityand recycling performance, thus being suitable for industrial production.
Owner:YANTAI UNIV
Magnetic microsphere for extracting and purifying paraquat metabolite, preparation method, kit and extraction method
PendingCN114113394AReduce the tediousness of the preparation processFast magnetic separationComponent separationParaquatMetabolite
The invention discloses a magnetic microsphere for extracting and purifying paraquat metabolite, a preparation method, a kit and an extraction method.According to the kit, amphiphilic carboxyl functionalized magnetic microspheres with a core-shell structure serve as an adsorption material, and a plasma sample can be efficiently and rapidly purified and treated; the matrix interference effect in the paraquat metabolite detection process is effectively reduced, and the concentrations of four metabolites of trace paraquat in a plasma sample of a poisoned patient are rapidly and accurately detected.
Owner:NINGBO MUNICIPAL CENT FOR DISEASE CONTROL & PREVENTION
Method for removing mercury ions from water by using silver-modified magnetic carbon nanotube and regeneration method
InactiveCN102553526BStrong specificityEasy to separateOther chemical processesCombustible gas purificationSorbentPollution
The invention discloses a method for removing mercury ions from water by using silver-modified magnetic carbon nanotubes and a regeneration method thereof. A trace amount of mercury ions (Hg2+) in a polluted water body are adsorbed by silver nanoparticle-loaded / iron oxide magnetic carbon nanotubes as adsorbent under the conditions that the temperature is 20 DEG C to 60 DEG C and the pH value is 3 to 8; and the adsorbent is recycled and regenerated by thermal desorption. The silver nanoparticle-loaded / iron oxide magnetic carbon nanotube has powerful capability and specificity of adsorbing mercury ions in water. With magnetic separation techniques, the process of separating the adsorbent from the water solution is greatly simplified, the probability of secondary pollution is reduced to the greatest extent, and the environmental benefit is improved.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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 kind of copper-doped composite magnetic nanomaterial and its preparation and application
ActiveCN104437344BSmall sizeLarge specific surface areaOther chemical processesWater contaminantsMicrosphereMagnetite Nanoparticles
The invention discloses a copper doped composite magnetic nano-material and preparation and an application of the copper doped composite magnetic nano-material, and belongs to the fields of magnetic particle synthesis and water treatment research. Aiming at a solvent thermal synthesis process of magnetic nanoparticles, according to the invention, copper chloride and ferric chloride are taken as metal salt precursors, based on solvent thermal reaction, and through copper doping ratio adjustment, the obtained mesoporous Cu-Fe3O4 microspheres have controllable particle size (560nm-120nm), specific surface area (40-100m2 g-1) and surface charge amount, and have the characteristics of high monodispersity, uniform size, high magnetic property (130-65emu g-1) and the like, and show excellent adsorption and regenerative adsorption properties for pentavalent arsenic and trivalent arsenic in a water body. The mesoporous Cu-Fe3O4 microspheres are simple in preparation process, low in cost and high in arsenic adsorption property, can be quickly magnetically separated, and has a good application prospect.
Owner:CENT SOUTH UNIV
Preparation method of molecularly imprinted nanocomposites on the surface of hydrophilic magnetic halloysite
InactiveCN103509161BUniform sizeEvenly distributedOther chemical processesWater contaminantsHalloysitePolymer science
The invention relates to a preparation method of a molecularly imprinted nanocomposite material on the surface of hydrophilic magnetic halloysite, belonging to the technical field of preparation of environmental functional materials. Magnetic halloysite was synthesized by impregnation method and high-temperature reduction method, and the magnetic nanoparticles were uniform in size and evenly distributed; through surface amination and amidation reactions, the initiator was grafted on the surface of magnetic halloysite, and the surface atom transfer radical polymerization was carried out , the molecularly imprinted polymer layer grafted on the surface of magnetic halloysite was controlled at the nanoscale; due to the existence of terminal ATRP active groups, hydrophilic polymer brushes were successfully grafted, and successfully applied to the efficient selection of sulfamethazine in water environments permanent removal and fast magnetic separation, and has excellent regeneration performance.
Owner:JIANGSU UNIV
Magnetic core-shell hydrogenation catalyst and method for preparing 2,2,4,4-tetramethyl-1,3-cyclobutanediol
ActiveCN112023939BFast hydrogenationImprove conversion rateOrganic compound preparationOrganic-compounds/hydrides/coordination-complexes catalystsPtru catalystOrganic chemistry
The invention relates to the field of catalyst preparation, and the invention discloses a magnetic core-shell type hydrogenation catalyst and a method for preparing 2,2,4,4-tetramethyl-1,3-cyclobutanediol, and the catalyst is expressed as Fe 3 O 4 @S / M; where Fe 3 O 4 is the core layer, S is the shell layer carrier, M is the main active metal and / or promoter metal supported on the shell layer carrier; the active metal is one or more of Ru, Ni, Ir, Pd and Pt, The loading amount is 1-50% by weight of the catalyst; the promoter is one or more of Cu, Fe, Co, Zn and Sn, and the molar ratio of the promoter to the main active metal is 0.1-10:1. The catalyst of the invention has the following advantages: (1) fast hydrogenation rate; (2) high conversion rate of raw materials and high selectivity to target products; (3) strong magnetism, which can realize rapid magnetic separation without filtering separation.
Owner:ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD +1
A special RO phase magnetic separator for steel slag powder
InactiveCN104841554BIncreased activity indexMeet quality requirementsDirt cleaningMagnetic separationSlagMagnetic separator
Owner:山东省建筑材料工业设计研究院 +1
Preparation method and application of novel material CNTs-TiO2 coated CuFe2O4
PendingCN114713228AFast magnetic separationEasy to separateWater treatment compoundsWater contaminantsSulfate radicalsMicrobiology
The invention discloses a preparation method and application of a novel material CNTs-TiO2-coated CuFe2O4. According to the preparation method, a CNTs-TiO2-coated CuFe2O4 / light / PMS novel advanced oxidation system is constructed, PMS is synergistically activated through photocatalysis to generate sulfate free radicals and hydroxyl free radicals which are long in service life and higher in oxidability, and therefore complete mineralization of antibiotic pollutants is achieved. The preparation method of the material is simple, an oxidation system is easy to construct and environmentally friendly, and a new guidance direction is provided for treatment of antibiotics in water.
Owner:KUNMING UNIV OF SCI & TECH
Preparation method of carbon-based magnetic temperature-sensitive surface imprinted adsorbent
InactiveCN103406108BHigh mechanical strengthImprove adsorption capacityOther chemical processesCarbon compositesCarbon layer
The invention relates to a preparation method of a carbon-based magnetic temperature-sensitive surface imprinted adsorbent, belonging to the technical field of preparation of an environmental functional material. The preparation method comprises the following steps: preparing a ferroferric oxide / carbon (Fe3O4 / C) magnetic composite material through a simple effective hydrothermal synthesis method; performing vinyl modification on the magnetic composite material; and preparing the magnetic carbon composite material surface temperature-sensitive imprinted adsorbent through a free-radical polymerization process, and using the adsorbent for selective recognition and separation of 2,4,5-trichlorophenol in a water solution. Due to the addition of a temperature-sensitive monomer, the material can realize controllable release under the acid-free conditions. The coating of the carbon layer ensures that the prepared imprinted adsorbent has remarkable magnetic stability under acidic conditions, and effectively prevents the aggregation phenomenon of ferric oxide. The material has high adsorption capacity, and obvious 2,4,5-trichlorophenol molecule recognition performance, magnetic separation and temperature-sensitive property.
Owner:JIANGSU UNIV
Magnetic separation device and magnetic separation method for reducing hematite-containing materials by microwave
Owner:INNER MONGOLIA UNIV OF SCI & TECH
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