674 results about "Ferriferrous Oxide" patented technology

A preparation method of a grapheme and ferriferrous oxide composite nanometer material belongs to the technical field of functional materials. The preparation method comprises the following steps: at first, oxidized grapheme is prepared by an improved chemical method; and then oxidized grapheme and ferric ions are adopted as raw materials, and are compounded through adopting a solvothermal technology to carry out one-step in-situ reduction to obtain the grapheme and ferriferrous oxide composite nanometer material. The preparation method solves the problems in the prior art that the interface binding force of grapheme and a magnetic material is insufficient, the appearances, the sizes and the magnetism of magnetic material particles are uncontrollable, and the magnetic material particles cannot be dispersed in water; the prepared composite nanometer material shows a microspheric appearance, has a loose surface and is high in specific surface area; through the change of the ratio of grapheme to the ferric ions, final magnetic property and electrical property of the composite material can be adjusted; and the controllable growth of the grapheme and ferriferrous oxide composite material is realized. The prepared grapheme and ferriferrous oxide nanometer microsheric material with magnetic and electric properties can be used in fields such as biological medicine, energy, invisibility and electronic materials.

The invention discloses a carbon cladded ferriferrous oxide negative electrode material of a lithium ion battery and a preparation method thereof. The negative electrode material is a carbon cladded Fe3O4 composite material and has a particle size in a range of 1 to 100 nm. The preparation method comprises the following steps: with NaCl used as a dispersing agent and a supporter, fully mixing NaCl with a metal oxide source and a solid carbon source; drying an obtained mixed solution under vacuum to obtain a mixture; placing the mixture into a tubular furnace for calcination in an inert atmosphere so as to obtain a calcined product; and rinsing and grinding the calcined product to obtain carbon cladded metal oxide nanometer particles. The method is safe and non-toxic and is simple to operate; during charging and discharging tests of a lithium ion button cell made of the carbon cladded ferriferrous oxide negative electrode material, discharge specific capacity can be maintained at 620 to 900 mAh/g after 30 cycles of charging and discharging at a current of 0.1C (with current density being 92 mA/g), and discharge specific capacity can be maintained at 600 to 760 mAh/g after 50 cycles of charging and discharging at a current of 1C (with current density being 920 mA/g); and the negative electrode material of the lithium ion battery has high reversible capacity and good cycling stability.

The present invention relates to a preparation method for a magnetic carbon-coated ferroferric oxide nano-composite material by a one-step carbonization reaction method. With the present invention, physical properties and chemical properties of the magnetic material are improved, and the application range of the nano-composite material is enlarged. The technical scheme of the present invention is that: massive FeCl3.6H2O is crushed into powder; the FeCl3.6H2O powder is placed in a beaker; then glycol is added, and a uniform stirring treatment is performed; urea and cyclodextrin powder are added to the resulting solution, and a uniform stirring treatment is performed; then the resulting mixing solution is transferred to a reaction kettle, and a reaction is performed for 6-24 hours at a temperature of 180-200 DEG C and under pressure of 0.105-0.150 MPa; finally, the mixing solution is cooled to the room temperature, treatments of sedimentation, separation and washing are performed, then a drying treatment is performed for 4-8 hours at the temperature of 80 DEG C to prepare the magnetic carbon-coated ferroferric oxide nano-composite material. According to the present invention, the preparation method is simple; the cost is low; the particle size of the product is small; the particles are the core-shell structures, wherein the Fe3O4 is the core, the carbon-coated layer is the amorphous carbon, and the surface of the carbon-coated layer contains hydroxyl groups; the material of the present invention is adopted as the catalyst carrier, and is applicable for wastewater treatments.

The invention discloses a ferroferric oxide/reduced graphene oxide composite wave-absorbing material with a hollow hemisphere structure, which is characterized in that ferroferric oxide nanoparticles with the hollow hemisphere structure are uniformly grown on the upper and lower surfaces of the reduced graphene oxide sheet to form a wave-absorbing material with a multi-layer composite structure and a nanosized thickness. The thickness of the composite wave-absorbing material is less than the range of 100 -1,000nm, which is the skin depth of ferromagnetic materials in a microwave frequency band. The invention also discloses a preparation method of the composite wave-absorbing material. The composite wave-absorbing material improves the content of ferroferric oxide in a composite material, has a thickness less than the skin depth of ferromagnetic materials in microwave frequency band, namely, 100-1,000nm, and effectively inhibits the skin dissipation of composite materials. The composite wave-absorbing material has light weight and good wave-absorbing property in actual utilization, not only can effectively absorb electromagnetic wave, but also can deflect and scatter radar waves, greatly improves the stealth effect in actual utilization, and completely meets requirements of a new wave-absorbing material of being thin, light, wide, and strong.

The invention relates to the technical field of preparation of environment functional materials, in particular to a magnetic composite material surface imprinting thermosensitive adsorbent, and a preparation method and the application thereof. The method comprises the following steps that: firstly, a ferroferric oxide/nerchinskite nanotube magnetic composite material is prepared by a solvent thermal synthesis method; secondly, the magnetic composite material is modified on ethenyl by using 3-(methacrylo) propyltrimethoxyl silane; and finally, the nerchinskite nanotube magnetic composite material is prepared by using the ethenyl-modified magnetic composite material as a substrate material, 2, 4, 5-trichlorophenol as a template molecule, methacrylate as a functional monomer, N-isopropylacrylamide as a thermosensitive functional monomer, ethylene glycol dimethacrylate as a cross-linking agent, and 2,2'-azodiisobutyronitrile as an initiator. The prepared thermosensitive imprinting adsorbent is obvious in thermal stability and magnetic stability, sensitive in magnetic effect and thermosensitive effect, relatively high in adsorption capacity, obvious in reversible absorption/release function along with temperature and obvious in tertiary calcium phosphate (TCP) molecule recognition performance.

The invention discloses a preparation method of a functional magnetic absorbent used for treating industrial wastewater. The method comprises the following four steps of: (1) preparing a ferroferric oxide nanocluster with a high magnetic saturation value by solvothermal synthesis; (2) modifying the ferroferric oxide nanocluster surface into a double-bond functional group by adopting a sol-gel process; (3) wrapping the ferroferric oxide nanocluster surface with a polymer shell containing an epoxy functional group in a distilling, precipitating and polymerizing manner; and (4) modifying a microsphere surface into an amino group or a carboxyl group through a ring-opening reaction of the epoxy group. The magnetic absorbent is high in functional group content, fast in magnetic responsiveness, easy for magnetic separation, regular in structure, stable in chemical and physical performances and high in dispersion stability in an aqueous solution; and the surface-modified amino and carboxyl functional groups can efficiently adsorb a plurality of heavy metals or organic pollutants, so that the magnetic absorbent can be applied to the field of industrial wastewater treatment. The preparation method is simple to operate and controllable in process and has a good application prospect.

The invention provides superparamagnetic nano Fe3O4 particles synthesized through in-situ induction of chitosan hydrogels, relating to a method for synthesizing the superparamagnetic nano Fe3O4 particles. The invention solves the problems of serious aggregation of the nano Fe3O4 particles and the complicated method for inducing the chitosan into the surface of the Fe3O4 in the current nano Fe3O4 particles. The method of the invention is that: 1. the chitosan powder is added into dilute acid solution; 2. cross-linking agent is added to make the chitosan hydrogels; 3. the chitosan hydrogels are sequentially dipped in Fe3+ aqueous solution, water, Fe2+ aqueous solution and water, and a plurality of times of circular leaching are made so as to form the chitosan hydrogels that contains iron ions; 4. then basification treatment is carried out; 5. the hydrogels is dissolved or degraded again, and finally the black superparamagnetic Fe3O4 nano particles are obtained upon centrifugalization. The method of the invention requires simple technique and mild conditions and the equipment used in the method is simple and can be obtained easily, thereby mass production can be achieved. The average diameter of the particles is 15 to 25nm, and the particles distribute evenly with superparamagnetism.

The invention provides a synthetic method and application of a metal-organic framework (MOF) composite nanomaterial. The method comprises the following steps: dispersing ferriferrous oxide magnetic spheres which are synthesized through a traditional hydrothermal technology in a weakly alkaline solution of dopamine hydrochloride to carry out self-polymerization of dopamine on the surfaces of the magnetic spheres; and sequentially dispersing polydopamine coated magnetic spheres in a dimethylformamide solution of zirconium chloride and a dimethylformamide solution of 2-amino-terephthalic acid to obtain the MOF composite nanomaterial with the magnetic sphere surfaces coated with polydopamine and modified with an amino group and with zirconium as a center metal ion. The material has the advantages of large specific surface area, good hydrophilicity and suitable pore structure, can be applied to further researches of the proteomics, and can specifically enrich Which can specifically enrich phosphorylated peptide segments and glycopeptides; the synthetic method is simple and quick; and the synthesized material has good hydrophilicity and biocompatibility, and can be used for selectively enriching endogenous phosphorylation peptide segments and glycopeptide in complex biological samples.

The invention discloses a magnetic PAFs solid-phase extracting agent. A preparation method of the magnetic PAFs solid-phase extracting agent includes allowing 3-aminopropyl triethoxy silylation ferroferric oxide to have a temperature-programmed reaction with piperazine and cyanuric chloride in the presence of N, N-diisopropylethylamine to obtain the magnetic PAFs solid-phase extracting agent. The magnetic PAFs solid-phase extracting agent and the preparation method thereof have the advantages that the prepared magnetic PAFs solid-phase extracting agent is good in dispersity and stable in core-shell structure; the preparation method is simple, low in cost, widely applicable, capable of achieving repeated material recycling, and the like; a covalent organic framework bonded to the ferroferric oxide can provide various action sites such as an inclusion interaction site, a hydrogen-bond interaction site, a pi-pi interaction site and an anion exchange site, so that the covalent organic framework has specific recognition and retention acting force on polar substances such as phenols and carboxylic acids.

The invention relates to a preparation method of a super-hydrophobic magnetic polyurethane/ferroferric oxide composite material, and belongs to the field of modification materials. Aiming at the shortcomings that an oil-water separation material on a bionic interface is lower in adsorption capacity, separation and recycling of a large area of oil and water cannot be realized, and an adsorption material cannot be repeatedly used, the preparation method is used for preparing a sponge composite material with super-hydrophobic and super-oleophilic characteristics by taking polyurethane sponge as a base body, fixing ferroferric oxide particles and dodecanethiol by dopamine, constructing a micro-nano structure on the surface of the sponge and introducing a low-surface-energy substance into the surface of the sponge. Therefore the composite material has the performances of being high in oil absorption capacity, selectively separating an oil-water mixture, quickly recycling an oil product and being recyclable.

The invention discloses a Fenton-like catalyst of graphene coated ferriferrous oxide (Fe3O4) micro-spheres as well as a preparation method and application thereof. The preparation method comprises the following steps: completely coating Fe3O4 particles by graphene; by taking an aqueous solution of inorganic ferric salt and graphene oxide as a precursor, rapidly preparing graphene oxide coated ferric salt precursor micro-spheres by adopting a spray-drying technology, and performing calcination reduction at a protective atmosphere to obtain a target product. The Fenton-like catalyst of the graphene coated Fe3O4 micro-spheres, disclosed by the invention, has relatively good catalytic efficiency and very good stability under the coordination of a hydrogen peroxide aqueous solution, can also be acquired by virtue of simple external magnetic field separation to be recycled and repeatedly used, can be used for reducing cost, and is an environment-friendly material.

The invention discloses a method for controlling morphology and performance of a ferriferrous oxide and belongs to the technical field of inorganic materials. The method comprises the following steps of: dissolving ferric trichloride hexahydrate in ethylene glycol to prepare a solution of which the ferric trichloride concentration is 0.15-0.35mol/L; then, adding urea and a surface active agent; fully dissolving to obtain a homogeneous solution; transferring the homogeneous solution into a high-pressure reaction kettle with a polytetrafluoroethylene lining; performing a solvent thermal reaction at the temperature of 170-230 DEG C for 6-72 hours; performing centrifugal separation after the reaction is ended; washing deposits by using deionized water and alcohol; and then, drying in a drying oven to obtain a finished product. The method for controlling the morphology and the performance of the ferriferrous oxide has the advantages that the production cost is low; the preparation technology is safe and simple; the product controllability is strong; and toxic and harmful substances are not generated in the preparation process. The obtained ferriferrous oxide is high in purity and centralized in particle size distribution, and the morphology can be mutually converted among a spherical structure, a microporous structure and a hollow structure.

The invention relates to a graphene-doped porous carbon/ferroferric oxide nano-fiber lithium battery anode material and a preparation method thereof. The preparation method comprises the following steps of preparing ferric salt and graphene-doped polyacrylonitrile/polymethyl methacrylate nano-fibers by utilizing electro-spinning technique, and obtaining the graphene-doped porous carbon/ferroferric oxide nano-fiber lithium battery anode material through pre-oxidization and high-temperature carbonization. The specific preparation method comprises the following steps of adding a certain amount of ferric salt and oxidized graphene into mixed solution of polyacrylonitrile/polymethyl methacrylate, obtaining electro-spinning solution after ultrasonic dispersion and high-speed stirring and dissolution, pre-oxidizing the nano-fibers obtained by electro-spinning at 200-300 DEG C, and obtaining the graphene-doped porous carbon/ferroferric oxide nano-fiber lithium battery anode material after carbonizing at 500-1000 DEG C. According to the graphene-doped porous carbon/ferroferric oxide nano-fiber lithium battery anode material prepared by the invention, the electrochemical performance can be effectively collaborative, and the specific capacity, the initial charge-discharge efficiency and the cycling performance of the battery are improved.

The invention discloses a chemical processing method, in particular to a preparation method for utilizing a solvothermal method to synthesize nano iron oxide. The invention adopts a certain amount of ferric chloride and dissolves the ferric chloride into a certain amount of methanol, ethanol or glycol and then a certain amount of sodium hydroxide is added, and later ultrasonic sound is adopted to equally disperse the mixture, and then the prepared mixture is transferred into a hydro-thermal reactor for a hydro-thermal processing under the temperature of 140 to 200 DEG C, and de-ethanol and/or deionized water for reaction liquid are adopted to wash reactants, and a centrifuge is adopted to remove the glycol solution and spare sodium hydroxide; the reactant is dried to obtain the iron oxide powder. The invention has the advantages that the method is simple, safe and reliable; the material is cheap; the output is high; the dispersity is better and the grain distribution is narrow, etc. The invention can be widely used by iron oxide manufacturers.

The invention discloses a manufacture method of a silver hybridization mesoporous ferroferric oxide antibiotic immunosensor and the application thereof. The manufacture method of the electrochemical immunosensor includes modifying thionine-graphene mixed solution on the surface of a glassy carbon electrode, conducting cross linking on an antibiotic antibody incubated by Ag-Fe3O4 mesoporous nanometer particles, closing non-specificity active sites by bovine serum albumin to manufacure the antibiotic electrochemical immunosensor. A detection method of antibiotic is that a reference electrode-saturated calomel electrode, an electrode-platinum filament electrode and a working electrode are correctly connected on an electrochemical working station, and immunodetection is conducted through the square wave voltammetry. The antibiotic electrochemical immunosensor has high sensitivity and selectivity, is simple in detection method and has the advantages of being quick, high in efficiency, goodin specificity, low in cost, convenient to operate and the like. It takes to 2-3 minutes to finish one detection process.

The invention provides a high-performance ferroferric oxide-carbon and nitrogen composite, and belongs to the technical field of composite materials. The composite is prepared by uniformly doping nano ferroferric oxide in a polypyrrole matrix. Because the composite has high activity and large specific surface area, and N atoms doped on the surface can immobilize active grains of a catalyst, and afuel cell catalyst prepared from the composite serving as a carrier has synergism with nanoparticles loaded on the catalyst to promote electrode catalysis reaction so as to improve the catalysis performance of the catalyst. Compared with the traditional catalyst prepared from a C carrier, the fuel cell catalyst has better catalysis performance and higher stability.

The invention discloses a preparation method of magnetic nanometer oxidized graphene. The preparation method comprises the following steps: 1) adopting an improved Hummers method to prepare the oxidized graphene; 2) adopting a hydrothermal method to load ferroferric oxide nano particles to the surface of the oxidized graphene prepared in the step 1) under the alkaline environment of pH>9, and therefore preparing the magnetic nanometer oxidized graphene. The invention further discloses the magnetic nanometer oxidized graphene and application of the magnetic nanometer oxidized graphene in biodiesel preparation. According to a new method for synthesizing biodiesel by utilizing the magnetic nanometer oxidized graphene in a catalytic mode, the dispersity of the magnetic oxidized graphene is high, the catalytic efficiency is high, the catalytic process is environmentally friendly, and the non-corrosiveness catalyst has excellent catalytic performance and conforms to the requirements for saving energy and reducing emission.

The invention specifically relates to surface carboxyl-functionalized core-shell type magnetic composite microballoons and a preparation method thereof, belonging to the technical field of functional materials. According to the invention, the core of the core-shell type magnetic composite microballoons is a magnetic ferriferrous oxide nanoparticle cluster, and the shell of the microballoons is a cross-linked carboxyl-containing polymer network. The preparation method comprises the following steps: at first, preparing the citric acid stabilized magnetic nanoparticle cluster (thereafter referred as magnetic cluster for short); then, modifying the surface of the magnetic cluster with active vinyl function groups by using the sol-gel method; finally, preparing the monodisperse core-shell type magnetic polymer composite microballoons which have high magnetic responsibility and contain abundant active carboxyl groups on their surface through distillation-precipitation polymerization. A variety of bioactive molecules can be bonded with the surface of the core-shell type microballoons through chemical modification for application in the field of biomedicine. Furthermore, the method can accurately control the thickness and cross-linking degree of the shell of polymers. The invention has the advantages of simple operation and controllable process and has a good application prospect.

The invention relates to a chemical illumination immunity analysis method for checking human cTnT, which uses acridiniumester and/or alkaline phosphatase as label. The immunity reaction uses two-site immunoassay and/or competition law. The immunity reaction can use streptavidin-biotin two-site immunoassay to improve sensitivity. The invention uses NaOH and H2O2 as acridiniumester illumination initiating agent, uses 1, 2-dioxo cyclohexane derivative (adamantine derivative) as the illumination substrate of alkaline phosphatase, and uses fluorescein derivative and surface activator as illumination renforcing agent. The solid carrier is orifice plate, macromolecule polymer tube (ball) and ferriferrous oxide magnetic particles or the like.

The invention provides a preparation method of urchin-like titanium dioxide magnetic microspheres having double-layer cavity structures. The method comprises the following steps of: preparing monodisperse ferroferric oxide magnetic microspheres with uniform particle sizes; (2) coating silicon dioxide and titanium dioxide in sequence on the surface of ferroferric oxide with a sol-gel method; (3) adjusting conditions such as the concentration of a sodium hydrate solution, hydro-thermal reaction time and the like to prepare urchin-like titanium-based magnetic microspheres having single/double-layer cavity structures; and (4) treating the titanium-based magnetic microspheres with a hydrochloric acid solution with a certain concentration, and calcining at high temperature to obtain anatase urchin-like titanium dioxide magnetic microspheres having double-layer cavity structures. A material prepared with the method has a high-activity anatase titanium dioxide crystal structure, an urchin-like surface and a large specific surface area; the double-layer cavity structures can accommodate a large quantity of guest molecules; the microspheres have superparamagnetism, and simple and quick separation and recovery of a catalyst can be realized; and the method has the advantages of low preparation cost, controllable process flow, easiness for operating, environmental friendliness and low energy consumption.

The invention discloses a preparation method of a reduction-oxidation graphene/ferroferric oxide composite wave-absorbing hydrogel having a three-dimensional structure. The composite wave-absorbing hydrogel has a micron-sized porous structure, and ferroferric oxide nano particles are uniformly distributed on a graphene nano sheet in a three-dimensional network. The electromagnetic microwave absorption property of the composite hydrogel changes with the content of the ferroferric oxide; and the composite hydrogel is light in weight and satisfies the characteristics of a microwave absorption material such as light weight and high strength. The invention also discloses a preparation method of the composite hydrogel, which comprises the following step: by using ascorbic acid as reducer, standing at normal temperature. The preparation method is convenient, quick and low in cost, and can realize large-scale production.

The invention provides a method for preparing monodispersed superparamagnetic polymer microspheres, which comprises the following steps of: swelling the polymer microspheres by adopting the swelling technology, and permeating oleic acid molecules into the polymer microspheres; raising the temperature, so that iron oleate is subjected to thermal decomposition in the microspheres to synthesize magnetic ferriferrous oxide nanoparticles, and the superparamagnetic polymer microspheres can be obtained. The prepared superparamagnetic polymer microspheres are uniform in grain diameter, controlled in magnetic content and stable in chemical properties, have the specific saturation magnetization of between 10 and 20 emu/g, and have potential application value in bioseparation.

The invention discloses a magnetic porous supported metallic chiral catalyst and an application thereof. The support of the catalyst is an amino-modified magnetic porous microsphere, and a preparation method of the amino-modified magnetic porous microsphere comprises the following steps: heating iron chloride in an aqueous solution comprising sodium citrate, urea and polyacrylamide for carrying out a hydrothermal reaction to prepare a ferriferrous oxide nanosphere, preparing a magnetic porous microsphere through a sol-gel process by using the ferriferrous oxide nanosphere as a magnetic core and tetrahexyl orthosilicate as a silicon source and adding a template cetyltrimethylammonium bromide, and carrying out a silane coupling reaction of the magnetic porous microsphere and 3-aminopropyltriethoxysilane to prepare the amino-modified magnetic porous microsphere. The catalyst provided by the invention is magnetic, allows reaction products to be easily separated through applying a magnetic field, and can be recycled several times, so the catalyst loss is reduced. The catalyst has a high catalytic efficiency, allows the e.e. values of the products to be high, and still has a very good catalytic capability in the repeated use.

The invention relates to a nanomicelle of magnetic tumor double-targeting polymer and a preparation method thereof. The nanomicelle of magnetic tumor double-targeting polymer is a nuclear shell structure; the surface of an outer shell is connected with targeted ligand, an inner core is enclosed with nano-particles of super paramagnetic ferriferrous oxide and anticarcinogen with hydrophobic property; in virtue of the physical effect of an external magnetic field and induction of the targeting ligand, the tumor double-targeting function of the nanomicelle is realized. The invention also provides the preparation method of the nanomicelle of magnetic tumor double-targeting polymer: polyethylene glycol with end capping by folacin, and poly Epsilon-caprolactone or sandwich copolymer of poly propiolactone are taken as raw materials and enclosed with the nano-particles of super paramagnetic ferriferrous oxide and the anticarcinogen with hydrophobic property, and then dialysed to obtain the nanomicelle of magnetic tumor double-targeting polymer. The drug carrier system of the nanomicelle reinforces the treatment effect of the anticarcinogen with hydrophobic property on tumor, prolongs the circulating time of the anticarcinogen in human body, intensifies the targeting action of drugs, improves the release efficiency and partial concentration of drugs, and reduces the dosage and toxic and side effect of drugs.

The invention discloses a flow injection chemiluminiscence detection sensor for a tumor marker. A preparation method of the flow injection chemiluminiscence detection sensor comprises the following steps of: preparing a flow injection chemiluminescence flow-through cell by utilizing polymethyl methacrylate; preparing carbon qunatum points, ferroferric oxide coated with carbon, silicon dioxide and hollow gold nano particles according to the existing method; coating the carbon qunatum points on the surfaces of magnetic particles; modifying primary antibodies on the magnetic particles coated with the carbon qunatum points; modifying the hollow gold nano particles on the silicon dioxide; coating secondary antibodies on the hollow gold nano particles positioned on the surface of the silicon dioxide; and carrying out chemiluminescence detection by utilizing flow injection. The flow injection chemiluminiscence detection sensor disclosed by the invention has the advantages of high specificity, high sensitivity, easiness for operation and low detection line.

The invention discloses a method for preparing an algae base magnetic activated carbon material and the application of the algae base magnetic activated carbon material. According to the method, the preparing process and the magnetizing process of the activated carbon material are synchronized, a one-pot mode is adopted, drying, smashing, sieving and other preprocessing and activating processes are not needed, the steps of washing, drying and activator removing and the like are not needed after carbonization, a ferric salt solution is directly carbonized into ferroferric oxide nanometer particles in the preparing process, the ferroferric oxide nanometer particles are loaded to the surface of the activated carbon material, the operation is simple and easy to carry out, the preparing period is short, cost is low, mass production can be achieved, and due to the fact that the environmental pollutant of blue algae is utilized in the preparing process, dual environment benefits are achieved. The prepared algae base magnetic activated carbon material has large specific surface area and porosity, can efficiently adsorb methylene blue or methylene blue or bisphenol A in wastewater, has superparamagnetism and can be quickly separated from a liquid phase system after adsorption, and recycling is facilitated.

The invention discloses a preparation method for Fe3O4 as black paint, which comprises preparing the FeSO4 solution, Fe(OH)2 and Fe3O4 by turns. With USA datacolor color photometer, CIE standard and D65 standard light source, the YP/TD/S-01 testing shows the product comes up to the index completely. Compared with prior art, this invention has short production period and small limit to material; the product has wide product color spectrum range to meet wide market application request with low cost.

The invention relates to a monolayer graphite oxide and magnetic ferroferric oxide nano-particle composite hybrid material, and a preparation method and application thereof. The monolayer graphite oxide and magnetic ferroferric oxide nano-particle composite hybrid material is made from raw materials of monolayer graphite oxide material and a mixture of bivalent malysite and ferric malysite by a chemical deposition method. The preparation method comprises the steps as follows: the monolayer graphite oxide is dispersed in sodium hydroxide aqueous solution to obtain monolayer graphite oxide with sodium carboxylate; then ion exchange is carried out on the mixture of monolayer graphite oxide and the bivalent malysite and the ferric malysite under the protection of nitrogen; the processed mixture is deposited by sodium hydroxide solution after excessive malysite is removed to obtain a solid product; and the solid product is separated out and dried to obtain superparamagnetic monolayer graphite oxide and ferroferric oxide nano-particle composite hybrid material. The material is used for loading drug to obtain an efficient controllable targeted drug carrier with the magnetic property of pH response. The invention has wide application prospect in the aspects of multiple targeted drug delivery, and the separation, the purification, the inspection and the like of nuclear magnetic resonance contrast medium, DAN, protein, etc.

The invention discloses a carbon-nanotube-loaded multi-stage nanometer ferroferric oxide adsorbent and a preparation method and application of the carbon-nanotube-loaded multi-stage nanometer ferroferric oxide adsorbent. The adsorbent comprises a carbon nanotube and multi-stage nanometer ferroferric oxide loaded on the carbon nanotube, wherein the ferroferric oxide has the grain size of 30 to 80 nanometers and mass fraction of 25 to 35%. The preparation method of the adsorbent comprises the following steps in sequence: mixing the oxidized carbon nanotube with an organic reducing agent and an organic iron compound; transferring the mixture into a reacting kettle; thermally synthesizing through an in-situ solvent in an oil bath under an inert atmosphere at reaction temperature of 180 to 270 DEG C and pressure of 0.1 to 2.0 MPa; cooling the reacting product; washing; and drying in vacuum to obtain carbon-nanotube-loaded multi-stage nanometer ferroferric oxide adsorbent. The carbon-nanotube-loaded multi-stage nanometer ferroferric oxide adsorbent disclosed by the invention is high adsorbing performance and easy to separate and recovery; and the preparation method is simple and low in cost, and has a wide application prospect in the field of adsorbing heavy metal ions and organic pollutants from the wastewater.

The invention relates to preparation and application of a magnetic hydroxyapatite/graphene oxide adsorbent. The preparation method comprises the following steps: mechanically stirring and mixing 50-350mL of 0.025mol/L calcium nitrate and 30-50mL of 0.30mol/L ammonium bicarbonate to be uniform, adding 0.10-0.20g of magnetic ferroferric oxide, maintaining the pH value of the system to be 10 by using ammonia water, reacting in a water bath at the temperature of 45 DEG C for 40 minutes, thereby obtaining an aging system; adding a graphene oxide dispersing system into the aging system, thereby preparing the magnetic hydroxyapatite/graphene oxide adsorbent. According to the preparation method disclosed by the invention, magnetic hydroxyapatite/graphene serves as an adsorbent, the preparation method is simple and feasible, the adsorption capacity is high, the adsorbent has excellent physical and chemical properties and mechanical property, heavy metal ion wastewater can be effectively treated and can be recycled, and the adsorption process is green and environmentally friendly.