134results about How to "Magnetic has" patented technology

The invention discloses a method for removing hexavalent chromium in wastewater through a magnetic adsorbent compounded by chitosan and magnetic biological carbon. The compounded magnetic adsorbent comprises the magnetic biological carbon, and the chitosan is combined on a magnetic biological carbon matrix. The preparation method comprises the following steps: firstly, utilizing FeCl3.6H2O to soak water hyacinth biomass; secondly, performing pyrolysis and calcination on the soaked biomass to obtain the magnetic biological carbon; finally, compounding the chitosan onto the surface of the magnetic biological carbon. The application steps are as follows: adding a composite material into the wastewater containing the hexavalent chromium with the concentration of 20-500 mg / L, wherein the usage amount of the composite material is 1-2 g / L; carrying out an oscillation and adsorption reaction at 10-50 DEG C for a period of time, and then separating the compound from the wastewater with a magnet to finish the removal of hexavalent chromium ions. The method has the advantages of being low in cost, simple in process, high in absorption property, easy in separation process, environmentally-friendly and the like.

The invention discloses a magnetic Co3O4-C nano material and a preparation method thereof as well as application of the magnetic Co3O4-C nano material as a catalyst for activating peroxymonosulfate to wastewater treatment and belongs to the technical field of water pollution control. The method takes a cobalt metal-organic framework compound as a precursor, and the precursor is calcined at a high temperature in a certain atmosphere to finally obtain the magnetic Co3O4-C nano material. A porous carbon component in the material can be used as a carrier of metal oxide so that catalytic sites are uniformly distributed, and pollutants in a water body can be effectively enriched so that the system degradation efficiency is improved; and a magnetic Co3O4 component in the material can be used as a heterogeneous catalyst for efficiently activating peroxymonosulfate to generate free radicals for degrading the pollutants in the water body. The method has the characteristics of high efficiency and convenience, wide pH applicable range, capability of recycling the catalyst through an external magnetic field, good circulating usability and environmental friendliness, and has an extremely great potential to actual treatment application of organic wastewater.

The invention discloses a magnetic styrene alkali anion exchange microsphere resin and a preparation method thereof. The resin comprises a basic framework and magnetic particles positioned inside the basic framework. The basic framework of the resin has the structure as follows: radical A is one or a plurality of the picture below, wherein n is 1, 2, 3 to 20, R1, R2 and R3 are alkyl, and X is C1 or OH. The method comprises the following steps of: adding a dispersant to a water phase; mixing reactants, a stabilizing agent and a pore-foaming agent to form an oil phase; adding an evocating agent to the oil phase for full dissolution; adding the magnetic particles to the oil phase, adding the oil phase to the water phase to obtain resin particles, filtering to remove water content, and washing or extracting the resin particles; and swelling the obtained resin particles, and adding an amine reagent. The invention simplifies traditional synthesis process, and prepared resin has magnetism and has higher alkali exchange capacity and can be used for separating or removing dissolved organic matters and a plurality of anions in various wastewater, drinking water or natural water.

The invention provides a method for preparing magnetic cellulose aerogel from wastepaper, and relates to an aerogel preparation method. The invention aims at providing a method for preparing regenerated magnetic cellulose aerogel from the wastepaper. According to the method, the wastepaper material in life is used as a raw material for preparing a green, ultralight and highly porous aerogel oil absorbing material. The method comprises the following steps: step one. preparing regenerated cellulose from wastepaper; step two. preparing regenerated cellulose aerogel; step three. carrying out hydrophobic modification on the regenerated cellulose aerogel; and step four. preparing the regenerated magnetic cellulose aerogel oil absorbing material. The method has the advantages that the magnetic cellulose aerogel oil absorbing material is prepared from the wastepaper in life, the material can be greatly saved, the waste is turned into wealth, the regenerated magnetic cellulose aerogel is simple in a preparation technology, low in cost, convenient to use, capable of effectively absorbing multiple organic solvents and oil matters leaked in water, and high in absorption rate, the oil absorption is thorough, the oil absorbing material is nontoxic and harmless and causes very little secondary pollution, and an adopted magnetic collection method is simple, convenient and easy to use.

The invention discloses a phase change microcapsule simultaneously having magnetism and photo-thermal conversion feature and a preparation method thereof. The phase change microcapsule is composed ofa core material and a wall material coating the core material; wherein the core material includes a normal alkane phase-change material and a surface-modified magnetic iron oxide, and the wall material includes a high-molecular resin material and a carbon material; mass ratio of the core material to the wall material is 1:1.05. The preparation method includes: firstly respectively pretreating thecore material and wall material: (1) stirring and mixing magnetic particles and the liquid phase-change material and performing ultrasonic treatment; (2) after a wall material prepolymer is prepared,adding the material with the photo-thermal conversion feature to the wall material prepolymer, and performing ultrasonic dispersion; then synthesizing the phase change microcapsule composite materialthrough in-situ polymerization. The phase change microcapsule has excellent phase-change heat storage performance, photo-thermal conversion performance and magnetism regulation performance. The preparation method is simple in process and employs accessible raw materials, so that the method has extensive industrial application prospect.

The present invention relates to a method for preparing a porous magnetic imprinting absorption agent through emulsion polymerization, and belongs to the technical field of environment function material preparation. The method comprises: preparing magnetic halloysite, carrying out vinyl modification on the halloysite, adopting a dispersion solution of the modified magnetic halloysite and 2,2'-azobis(2-methylpropionamidine) dihydrochloride as a water phase, adopting a mixture of a template molecule cyhalothrin, a function monomer methacrylic acid, a cross-linking agent ethylene glycol dimethacrylate, a pore-forming agent and an organic solvent chloroform as an oil phase, mixing the water phase and the oil phase, carrying out an ultrasonic treatment to prepare stable Pickering emulsion, carrying out polymerization to prepare porous magnetic imprinting, adopting a methanol and acetic acid mixing solution to wash to remove the template molecule, and carrying out vacuum drying on the obtained porous magnetic imprinting at a temperature of 50 DEG C, wherein the obtained product is used for selective recognition and separation of cyhalothrin in an aqueous solution. The prepared porous magnetic imprinting absorption agent has characteristics of significant thermal stability, significant magnetic stability, high absorption capacity, and significant cyhalothrin molecule recognition property.

The invention discloses a method for preparing magnetic cellulose aerogel by utilizing waste paper. An ultra-light multi-porous gas magnetic hydrophobic aerogel adsorbing material is prepared by using waste paper fibres in life as a raw material; waste paper regenerated cellulose gel is prepared by utilizing an microwave auxiliary ionic liquid dissolution method; black red waste paper cellulose aerogel is obtained through magnetic modification and hydrophobic and oleophobic modification. The magnetic cellulose aerogel disclosed by the invention can effectively remove a variety of organic pollutants and oily materials leaked in water; the absorption multiplying power is high; oil is absorbed thoroughly; an adsorbing material is non-toxic and harmless; the adopted magnetic collecting method is simple and easy to use; secondary pollution is low; the preparation method is simple in process and mild in conditions; waste can be changed into treasure by conventional industrial equipment and low-cost raw materials; the emission of waste water, waste gas and waste residues is avoided in a production process; the method has a wide popularization application value and social significance.

A magnetic levitation synchronous belt conveyor comprises a driving device, a transmission shaft, synchronous belt wheels, a magnetic conveying belt-permanent magnet suspension supporting device, a machine frame and a return roller. The driving device is connected with the transmission shaft which is provided with the two synchronous belt wheels in parallel. Synchronous belts are wound on the two synchronous belt wheels which are arranged in parallel respectively. The two synchronous belts are fixed at the edge of the inner surface of a conveying belt and are arranged in parallel. Permanent magnets are fixed at the center line of the inner surface of the conveying belt and are arranged at equal distance in the conveying direction on the inner surface of the conveying belt. A permanent magnet supporting device is fixed on the machine frame and replaces an upper roller support of a common belt type conveyor. According to the magnetic levitation synchronous belt conveyor, the conveying belt has magnetism, system manufacturing cost and maintaining cost are low, deviation and slipping cannot happen, operation resistance is low, efficiency is high, energy loss is low, operation is stable, noise is low, and high-speed operation can be achieved.

The invention discloses a construction method for magnetic putty powders and magnetic wall surfaces. According to the part by weight, the magnetic putty powder consists of 5-60 parts of putty powders or adhesive and 95-40 parts of magnetic iron mine powders or iron powders which are uniformly mixed with each other; when the magnetic putty powder of the invention is used for plastering the wall surface, according to the design requirement, a trough with a certain length, width and depth is remained on the new wall surface which is not decorated or no the original wall surface; the magnetic putty powder added with water is uniformly mixed to prepare the magnetic putty; subsequently, the magnetic putty is filled in the trough and plastered flatly; after the magnetic wall surface is dried, required coatings are brushed on the magnetic wall surface. When the magnetic putty of the invention is used for plastering the wall surface, the wall surface has magnetism, facilitates the hanging of drawings, paints and decorations, and is convenient and beautiful.

The invention provides a compound material used for hexavalent chromium removal and a preparation method thereof. The compound material is prepared from charcoal and magnetic ferriferrous sulfide loaded onto a charcoal matrix; the preparation method comprises the steps that through a pyrolysis and calcination method, rice hull is used as a raw material to prepare the charcoal; the charcoal is immersed in a solution containing ferrous sulfate, L-cysteine is used as a sulfur source, ethylene glycol is used as a solvent, and through a solvothermal method, the magnetic charcoal / ferriferrous sulfide compound material is synthesized in one step; application comprises the steps that the compound material is added into hexavalent chromium wastewater with a concentration of 20 mg / L, the usage amount of the compound material is 0.2-1.0 g / L, and after oscillatory reaction is carried out for a period of time at 25 DEG C, a magnet is used for separating the compound material and the solution, so that hexavalent chromium ions in the wastewater are removed. The compound material used for hexavalent chromium removal and the preparation method thereof have the advantages that the compound materialpreparation method is simple, low in cost, environmentally friendly and high in efficiency of removing the hexavalent chromium ions in the wastewater and the like.

The invention provides a method for preparing and synthesizing a ferroferric-oxide-supported cobalt selenide magnetic nano composite material by a hydrothermal process and application thereof, belonging to the technical field of preparation and application of nano materials. The invention does not need to previously prepare any template or use any surfactant, has the advantage of mild reaction process, and is easy to control; and the obtained ferroferric-oxide-supported cobalt selenide magnetic nano composite material has high activities in catalyzing reduction of nitrophenol and adsorbing methylene blue. The result indicates that 1mg of ferroferric-oxide-supported cobalt selenide magnetic nano composite material can completely catalyze the nitrophenol in 0.1ml of 5.0*10<-3>M nitrophenol solution by only 13 minutes; and 50mg of ferroferric-oxide-supported cobalt selenide magnetic nano composite material can completely adsorb the methylene blue in 50ml of 5mg / L methylene blue solution by only 25 minutes. Besides, the prepared sample has magnetic property, thus, can be conveniently separated and collected with a magnet, and is convenient for recycling.

The invention relates to a method for preparing an inorganic magnetic material for filling a hollow mesoporous silicon dioxide ball, which comprises the following steps: (1) preparation of two reaction solutions: A solution, 0.05 to 2g of hexadecyl trimethyl ammonium bromide is dissolved into 12 to 70 ml of ethanol, is stirred for 10 minutes for fully dissolving, and is added with 0.5 to 9 ml of ethyl orthosilicate to be stirred fully, wherein a surfactant is hexadecyl trimethyl ammonium bromide; and B solution is 0.01 to 0.4 M of ammonia solution; (2) preparation of ferric salt solution, the mol ratio of ferrous ions to ferric ions of the ferric salt solution is 1:2, and the ferric salt solution is added into the B solution to be prepared into sol; and the volume ratio of the ferric salt solution to the B solution is 1:2,000-1:200; (3) the A solution is added into the sol generated in the step (2), the stirring speed is reduced, the mixed solution is immediately filtered after pale yellow precipitate is generated, and the volume ratio of the A solution to the sol is 1:4-1:10; and (4) the precipitate is dried at room temperature, and is kept for 1 hour at the temperature of 600 DEG C under the protection of nitrogen.

The invention discloses amidoxime-based magnetic polyphosphazene nano-microspheres with a core-shell structure and preparation thereof as well as application of the amidoxime-based magnetic polyphosphazene nano-microspheres serving as a uranium adsorbent. Surfaces of magnetic iron nanoparticles are coated with polyphosphazene; then the polyphosphazene is grafted with polyacrylonitrile and the polyacrylonitrile is subjected to hydroximation to obtain the amidoxime-based magnetic polyphosphazene nano-microspheres with the core-shell structure. The surfaces of the microspheres have rich amidoxime-based functional groups so that the microspheres have good dispersity in a water system and have a large adsorption amount and high selectivity on uranium in a water solution system; the microsphereshave magnesium and are easy to separate from water, and have a relatively good application prospect in the aspects of treating radioactive wastewater and extracting the uranium from seawater.

The invention discloses a micro-arc oxidation preparation method of a magnetic TiO2 bioactive coating. In an air environment, an electrolytic solution containing calcium salt, phosphor salt and molysite is taken, a pH value of the electrolytic solution is adjusted to be 5.0-5.3, titanium or a titanium alloy is taken as an anode, stainless steel is taken as a cathode, and titanium or the titanium alloy is subjected to micro-arc oxidation treatment for 1-8min by adopting a pulsed power supply, with the temperature of the electrolytic solution being kept at 5-25 DEG C, thus the magnetic TiO2 bioactive coating is generated on a surface layer of titanium or the titanium alloy. The magnetic TiO2 coating having magnetism (Ms being 0.2696-1.101emu / g) and good bioactivity can be prepared with the adoption of the micro-arc oxidation preparation method.

The invention relates to a unidirectional transparent composite magnet and a preparation method. The preparation method comprises the following steps of: adding a certain quantity of ferromagnetic particles into an organic polymer monomer; carrying out even mechanical stirring under a proper temperature condition; if an organic matter is a thermosetting polymer, adding a proper quantity of curing agent or cross-linking agent after a system is evenly dispersed; continuously stirring evenly; injecting a dispersed composite system into a die; applying a magnetic field on the die; orienting for certain time; and keeping warm and solidifying a sample subjected to orienting forming for certain time until the sample is completely solidified. The technology for preparing the unidirectional transparent composite magnet disclosed by the invention is simple and practical. The prepared composite magnet sample has the advantages of compact tissue, low porosity and smooth surface. Magnetic particles in the magnet are in chained distribution under the action of an external magnetic field, and the magnetic particles have the photopermeability in the direction parallel to the cluster direction while the magnetic property is endowed to the magnet.

The invention relates to the technical field of carbon aerogel, in particular to a preparation method of iron-nitrogen co-doped magnetic porous graphitized nano carbon aerogel. The preparation methodcomprises the following steps: (1) dissolving chitosan in an acetic acid solution, adding a trivalent iron salt solution, executing stirring until the reaction is completed to obtain a uniform and stable red-brown viscous transparent solution, and executing vacuum freeze drying to obtain chitosan-Fe<3+> chelate aerogel; (2) executing carbonization: obtaining a black aerogel carbonized sample; (3)executing activation: obtaining the iron-nitrogen co-doped magnetic porous graphitized nano carbon aerogel. The chelate formed by the nitrogen-containing high molecular material chitosan and ferric salt is used as a carbon source, a nitrogen source and an iron source to prepare the iron-nitrogen co-doped magnetic porous graphitized nano carbon aerogel, the iron-nitrogen co-doped magnetic porous graphitized nano carbon aerogel has large specific surface area and an ideal pore structure and can present good electrocatalytic oxygen reduction activity, electric double-layer super capacitance performance and organic dye adsorption performance by adjusting the iron content.

The invention relates to the field of coatings, and discloses a superstrong magnetic coating and a preparation method thereof. The coating is prepared from the following raw materials in parts by weight: 30-50 parts of film-forming resin, 50-450 parts of permanent magnet powder, 30-50 parts of diluents, 1-3 parts of a defoaming agent, 3-5 parts of a coupling agent and 3-10 parts of a toughening agent. The preparation method includes the following steps that magnetizing operation is performed on the permanent magnetic powder; primary stirring operation is performed on the permanent magnetic powder, the diluent, the defoaming agent, the coupling agent, the toughening agent and part amount of the film-forming resin to enable the raw materials to be mixed uniformly to obtain mixed liquid; andsecondary stirring operation is performed on the mixed liquid and the remaining amount of the film-forming resin to enable the raw materials to be mixed uniformly to obtain the superstrong magnetic coating. The coating has higher magnetic powder content and higher magnetic absorption performance, can attract hard magnetic materials such as magnets, and can attract soft magnetic materials such as iron, cobalt and nickel, and the application range of magnetic coatings is greatly expanded.

The invention discloses magnetic anti-counterfeiting aluminum-foil paper, which comprises base paper and an aluminum-foil layer, wherein the surface of the aluminum-foil layer is coated with a layer of magnetic coating with a thickness of 10 to 40 microns; the coating is prepared from the following raw materials in percentage by mass: 15 to 25 percent of polyurethane resin, 5 to 10 percent of magnetic nano silica, 50 to 70 percent of organic solvent, 0.3 to 0.5 percent of aluminum oxide, 0.5 to 1 percent of dispersant, 0.1 to 0.5 percent of coupling agent, 0.5 to 1.5 percent of lubricant, 0.5 to 1 percent of antistatic agent and 2 to 5 percent of toluene diisocyanate. According to the magnetic anti-counterfeiting aluminum-foil paper, the surface of the aluminum-foil paper is coated with a layer of magnetic material; the part into which magnetic powder is added is different from other aluminum-foil paper in hand feeling, and particularly can be identified through a magnetic metal identifier or a magnetic induction device, so as to achieve an anti-counterfeiting purpose.

The invention discloses magnetic hyperbranched polyamide-amine and an application of the magnetic hyperbranched polyamide-amine to organic phosphorus pesticide leftover detection. Polyamide-amine is grafted on the surface of Fe3O4@SiO2 by successive generations to obtain a three-dimensional dendritic magnetic hyperbranched material with the polyamide-amine grafted on the surface. The material structurally contains rich amino (primary amine, amide and tertiary amine), hyperbranched organic chains and an appropriate quantity of internal cavities. The magnetic hyperbranched polyamide-amine serving as a purifying material is used for a QuEChERS method, most impurities can be removed by individually using the material, purification is achieved, combination of different purifying materials is omitted, the material has magnetism, can be rapidly separated from solution under the action of an external magnetic field and is simple to operate, analysis time is effectively shortened, and rapid detection of a large number of samples is facilitated.

The invention discloses a method for modifying a polyester fabric by using magnetic nano iron trioxide. The method comprises the following steps of: 1, preparing a sodium hydroxide solution, pretreating the polyester fabric by using the sodium hydroxide solution, and washing and drying the pretreated polyester fabric; 2, preparing a mixed solution of ferric nitrate, oxalic acid, sodium dodecyl benzene sulfonate and polyethylene glycol, and putting the pretreated polyester fabric into the mixed solution for hydrothermal reaction; and 3, preparing a coupling agent solution, putting the modified polyester fabric into the coupling agent solution, curing the modified polyester fabric treated by the coupling agent solution to obtain the polyester fabric coated with a magnetic nano iron trioxide film. By the method, the problems that the common polyester fabric formed by the conventional modification method is nonmagnetic and has poor washing performance and relatively poor ventilating performance, and a user does not have good handfeel are solved.

The invention discloses an automatic recovery device of medical infusion apparatus. A magnet layer comprises magnetic conduction blocks and electromagnets, and each magnetic conduction block corresponds to one set of electromagnet, and the electromagnets are electrified to generate magnetism; through conduction, the corresponding magnetic conduction blocks also have magnetism due to the fact thatiron cores of the electromagnets are attached to the bottom surfaces of the corresponding magnetic conduction blocks, needle heads are attracted to adjacent positive pole pieces and negative pole pieces, and then the positive pole pieces and the negative pole pieces are conducted; the needle heads are heated after being electrified, and under the centrifugal action of needle tubes, the heated needle heads and the needle tubes are separated; the separated needle heads are subjected to action by the magnetic conduction blocks, so that the needle heads are not prone to be separated from a ceramiclayer corresponding to the magnetic conduction blocks during subsequent separation; according to the device, one magnetic conduction block corresponds with one end of a coil of the electromagnets andis connected with the positive pole of a power supply through thermistors, and the positive pole pieces arranged on the ceramic layer corresponding to the magnetic conduction blocks are also connected with the positive pole of the power supply through the same thermistors; and when the needle heads are attracted on the ceramic layer corresponding to the magnetic conduction blocks, the needle heads are heated, the heated needle heads are separated from the needle tubes under the centrifugal action of the needle tubes.

The invention discloses a preparation method of a porous magnetic composite wool-loaded rhodium-doped BiOBr photocatalyst. The preparation method of the porous magnetic composite wool-loaded rhodium-doped BiOBr photocatalyst is characterized by comprising the following steps: dissolving wool by using 1-allyl-3-methylimidazolium bromide and adding polyvinyl alcohol and nano ferroferric oxide to obtain porous magnetic composite wool particles; preparing bulking rhodium-doped BiOBr powder by using a combustion method; and then adding the following components in a reactor in percentages by mass: 72-78% of liquid paraffin and 4-8% of sorbitan fatty acid ester, adding 2-5% of rhodium-doped BiOBr powder while stirring violently, adding 12-18% of porous magnetic composite wool particles, stirringand reacting, carrying out solid-liquid separation, washing with anhydrous ethanol, and drying to obtain the porous magnetic composite wool-loaded rhodium-doped BiOBr photocatalyst. The preparation method of the porous magnetic composite wool-loaded rhodium-doped BiOBr photocatalyst has the characteristics that the preparation method is simple, the stability of the catalyst is good, and the catalyst can be degraded and is environmentally friendly and the like; and the catalyst is easy to recycle, reaction conditions are gentle, the catalytic activity is high, the use amount is small and the like.

The invention discloses a preparation method and an application of an oxidized graphene and magnetic chitosan compound. The preparation method comprises the following steps: firstly, nano magnetic particles are prepared; the magnetic particles are taken as carriers and coated with chitosan by means of glutaraldehyde; magnetic chitosan is covalently bound to the surface of oxidized graphene, and the compound is obtained. The composite is applied in steps as follows: 0.1-1 g of the composite is added to a liter of triclosan waste water with the concentration being 0.5-10 mg / L, pH of the mixture is adjusted to range from 3 to 10, the mixture is subjected to batch adsorption at the temperature of 10-50 DEG C for 1-36 h, then the composite is separated from water by the aid of a magnet, and the composite is obtained. The oxidized graphene and magnetic chitosan compound has the advantages of high adsorption performance, low cost, quick separation and recovery, environment-friendliness and the like.

The invention discloses a graphene oxide-sodium alga acid magnetic composite material and a preparation method thereof. The preparation process comprises the following steps: modifying sodium alginate using polyamidoamine (PAMAM); performing freeze-drying treatment using liquid nitrogen so as to obtain a sodium alga acid / silk magnetic porous composite material; dipping the sodium alga acid / silk magnetic porous composite material in a graphene oxide solution, taking out the composite material, repeatedly cleaning the material with ethanol and deionized water, and drying in vacuum, thereby obtaining the graphene oxide-sodium alga acid magnetic composite material. According to the method disclosed by the invention, the sodium alga acid and silk are taken as base materials, graphene oxide is effectively self-assembled, and the prepared graphene oxide-sodium alga acid magnetic composite material has huge application value in the fields of adsorption materials, biological materials, medical materials and the like.

The invention discloses a magnetic graphene oxide-chitosan composite material as well as a preparation method and application thereof. The composite material is prepared from graphene oxide, surface-loaded magnetic nano particles, and chemically-cross-linked high polymer material chitosan. The preparation method comprises the following steps: firstly, directly synthesizing magnetic nano particlesFe3O4 in a graphene oxide dispersion solution under a nitrogen protection condition, loading the magnetic nano particles onto the surface of the graphene oxide, and thus obtaining the magnetic graphene oxide material (M / Go); and then cross-linking the magnetic graphene oxide and the chitosan by adopting a secondary chemical cross-linking method, and thus obtaining the magnetic graphene oxide-chitosan composite material (MGC). The composite material used as an absorbent has the characteristics of large specific surface area, high absorption capacity, short absorption balance time, high magneticfield intensity and the like, is easy for rapidly absorbing Co(II) in the waste water and for separating solid and liquid, and is good in effect.

The invention discloses a two-dimensional nitrogen-doped magnetic ionic liquid zeolite imidazate nano material and a preparation method and application thereof. The preparation method comprises the following steps: weighing ZIF-8, placing ZIF-8 in ultrapure water, carrying out ultrasonic dispersion uniformly, adding bromo-1-hexyl-3methylimidazole and 1-hexyl-3methylimidazole ferric chloride, keeping ultrasonic homogenization, adding FeSO4-7H2O into the mixed solution under the protection of N2 and high-speed stirring, simultaneously adding ammonia water and stirring, collecting black magneticmicrospheres by using a magnet, washing, carrying out vacuum drying, and grinding to obtain MILZIF. The synthetic method of the porous magnetic core-shell structure material synthesized by the invention is rapid by one step, and a traditional method of constructing a magnetic core at first and then constructing nano material particles on the surface is not required. A bisimidazole group is constructed through combination of ZIF-8 and IL, so that the functional groups of the material are abundant and diversified. The prepared material has magnetism and larger specific surface area, and meanwhile, is convenient to separate and recycle.

The invention discloses a magnetic polybenzimidazole (PBI) molecular imprinted adsorbing agent, preparation and use of the magnetic polybenzimidazole (PBI) molecular imprinted adsorbing agent. The preparation method comprises the step: with PFOS (perfluorooctane sulfonates) as a template molecule and soluble PBI as a functional monomer, preparing a magnetic molecular imprinted polymer (MMIP) with a function of specifically identifying PFOS by using Fe3O4 magnetic nanometer particles. The saturation magnetization of the prepared magnetic PBI molecular imprinted polymer is 75.998 emu / g. The MMIP is used for removing the PFOS in a water body, has a good selective removing effect, and is capable of rapidly achieving adsorption equilibrium. Meanwhile, the magnetic PBI molecular imprinted polymer can be recovered through an applied magnetic field, thereby facilitating recycling. The magnetic polybenzimidazole molecular imprinted adsorbing agent has great importance in adsorption removal of the PFOS in water, and has a good application prospect in wastewater treatment.

The invention discloses a gas-coagulation lightweight surface exterior wall coating, and belongs to the technical field of building coatings. The gas-coagulation lightweight surface exterior wall coating comprises the following components in parts by weight: 25-30 parts of a film forming emulsion, 10-20 parts of titanium white powder, 5-6 parts of kaolin, 24-30 parts of heavy calcium, 1-1.5 pats of an anti-freezing agent, 0.4-0.8 part of an anti-foaming agent, 0.2-0.5 part of an adhesion accelerator, 0.1-0.15 part of an anti-radiation agent, 1-2 parts of an anti-cracking enhancer, 0.1-0.2 partof a wetting agent, 0.8-1.2 parts of a film-forming auxiliary agent, 0.1-0.2 part of a cellulose thickener, 0.1-0.3 part of a dispersant, 0.2-0.3 part of a PH regulator, 1-3 parts of a viscosity stabilizer, 5-6 parts of silver nanoparticles, 5-6 pats of a magnetic aerogel, and 10-20 parts of deionized water. By the lightweight and heat insulation characteristics of the magnetic aerogel, the exterior wall coating is endowed with the characteristics of gas-coagulation and lightweight, and the uniform dispersion of the magnetic aerogel in the coating is guided by applying the external magnetic field in the mixing process, so that the overall performance of the coating is improved, such as cracking resistance, viscosity and heat insulation of the coating.

The invention provides a sulfur-doped graphite-like carbon nitride nanosheet loaded graphene and ferroferric oxide composite magnetic photocatalyst. A sulfur-doped graphite-like carbon nitride nanosheet is taken as a carrier, and graphene and ferroferric oxide particles are modified on the sulfur-doped graphite-like carbon nitride nanosheet. The preparation method comprises the following steps: preparing sulfur-doped graphite-like carbon nitride nanosheets by using thiourea through high-temperature pyrolysis, preparing a sulfur-doped graphite-like carbon nitride loaded graphene composite material by using an impregnation method, and preparing the sulfur-doped graphite-like carbon nitride loaded graphene and ferroferric oxide composite photocatalyst material by using an alkaline-thermal coprecipitation method. The composite magnetic photocatalyst has the advantages of high photocatalytic activity, good stability, magnetic force and easy recovery, and the preparation process has the advantages of simple operation, low cost and good safety. The composite magnetic photocatalyst can be used for treating wastewater containing various antibiotics and is good in stability and practicability, high in efficiency, easy and convenient to operate, low in cost and high in recycling value.

The invention relates to a magnetic covalent triazine framework material, and a preparation method and an application thereof. The magnetic covalent triazine framework material comprises a covalent triazine framework and Fe3O4. The magnetic covalent triazine framework material of the invention is magnetic, is convenient to recycle, can be used in wastewater treatment, and also can be used in the degradation of antibiotics as a catalyst. The preparation method of the invention is characterized in that terephthalonitrile is rapidly condensed with microwaves as a heat source and Fe3O4 as a microwave absorption and transmission medium. The presence of the Fe3O4 makes a powder aggregate in the reaction process in order to make the powder not prone to fly over, so the reaction is complete.