1868 results about "Ferriferrous Oxide" patented technology

The invention belongs to the field of electromagnetic wave absorbing material preparation and relates to a polyaniline / oxidized graphene / ferriferrous oxide composite material and its preparation method. The preparation method comprises the following steps: (1) preparing graphite oxide; (2) preparing ferriferrous oxide nanoparticles; (3) preparing a polyaniline / oxidized graphene / ferriferrous oxide ternary complex; and (4) weighing the polyaniline / oxidized graphene / ferriferrous oxide ternary complex and paraffin, and uniformly mixing to obtain the polyaniline / oxidized graphene / ferriferrous oxide absorbing material. The material provided by the invention has characteristics of low cost, simple preparation technology, strong electromagnetic wave absorbing capability, wide absorption band, low density and the like, has good electromagnetic property, and has important application value in the field of microwave absorption and electromagnetic shielding.

The invention relates to a biomass magnetic carbon material for degrading organic dye. The material is prepared by mixing a biological raw material and an iron precursor at a ratio of (2-20kg):1kg. Meanwhile, the invention also discloses a preparation method of the biomass magnetic carbon material. The biomass magnetic carbon material provided by the invention is cheap and efficient and has double effects of adsorption catalysis and degradation; serving as an efficient catalyst in a process of constructing a Fenton-like system for treating high-concentration wastewater, the biomass magnetic carbon material has high catalytic activity in thoroughly oxidizing and degrading organic dye; the degradation effect is better than that of a ferrous ion homogeneous catalysis reaction and a Fenton-like reaction taking ferroferric oxide as a catalyst.

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 present invention provides the preparation process of super-paramagnetic polymer microsphere. The super-paramagnetic polymer microsphere consists of polyolefin polymerized with lipophilic olefin monomer and organic monomer with hydrophilic functional radical and coated nano magnetic grains of modified ferroferric oxide. The nano magnetic grains with one surface lipophilic layer can be well dispersed in organic matter to form magnetic fluid and dispersed inside polymer microsphere to obtain super-paramagnetism. The microsphere is regular and has size of 0.1-5 micron and has magnetic ferroferric oxide accounting for 0.5-40 wt% of the whole micro microsphere. The present invention has the advantages of simple preparation process, narrow microsphere size, regular appearance, high functional radical content, homogeneous magnetism, stable chemical performance and acid and alkali resistance.

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 belongs to the technical field of nano materials and biomedicine, in particular to multifunctional core-shell structure fluorescent coding magnetic microspheres and a preparation method thereof. On the basis of ferroferric oxide nanoparticles synthesized by a hydrothermal process, pre-prepared coupled product of fluoresceins and amino propyl trimethoxysilane and ethyl orthosilicate are subjected to cohydrolysis in ammonia water to form a multifunctional fluorescent magnetic nano composite material with fluorescent and magnetic properties and high biological stability and biological adaptability. By regulating the mixing ratio of fluoresceins, namely fluorescein isothiocyanate (FITC) and rhodamine B isothiocyanate (RBITC), various fluorescent coding magnetic microspheres can be prepared, and the particle size of obtained material can be regulated according to the different ratios of the added ethyl orthosilicate to the ferroferric oxide. In addition, the obtained multifunctional composite nano material is subjected to amino silanization modification, so the biological application range of the novel fluorescent coding magnetic microspheres is further expanded and the novel fluorescent coding magnetic microspheres have bright application prospect in fields of biomedicine technology, medicine development, suspension chip and the like.

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 discloses a c hydrothermal preparation method for carbon cladded nanometer ferriferrous oxide particles. The method comprises the following steps: mixing an glucose carbon source solution with a ferric nitrate solution; subjecting an obtained mixture to a hydrothermal reaction; collecting sediment through centrifugation after the hydrothermal reaction and dispersing the sediment in ionic water again; carrying out freeze-drying so as to obtain powder; and calcining the powder in a tubular furnace in an inert atmosphere so as to obtain the carbon cladded nanometer ferriferrous oxide particles. The nanometer particles have good stability, do not easily get agglomerated and have a particle size controllable within a range from 50 nm to 500 nm; and the preparation method is simple, safe and non-toxic, has high output and is applicable to industrial production and utilization. The carbon cladded nanometer ferriferrous oxide particles can be used in a wide variety of fields like magnetic materials, catalyst supporters, magnetic resonance imaging and targeting drug carriers; and the particles can also be used for a negative electrode material of an electrode of a novel lithium ion battery and show a reversible lithium storage property.

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 discloses a preparation method of a magnetic sandwich nano immunosensor and application of the preparation method. The preparation method is characterized by comprising the following steps: mixing and stirring a collaurum solution and silane ferriferrous oxide into a colorless and transparent solution, and carrying out magnetic separation by externally applying a magnet to obtain FE3O4 / Au colloid nano magnetic beads; loading horse radish peroxidase (HRP) and secondary antibodies of an object to be measured to the FE3O4 / Au colloid nano magnetic beads to obtain a secondary antibody probe Fe3O4 / Au-HRP-Ab2; electrically depositing Au to a glassy carbon electrode, loading primary antibodies of the object to be measured, and then closing non-specific active sites by using protein to obtain an Abl / Au / GCE electrode; and finally, loading antigen to the Abl / Au / GCE electrode, and then obtaining the sandwich nano immunosensor by combining the magnet probe. The magnetic sandwich nano immunosensor can be used for measuring the concentration of melamine, tonyred, clenbuterol or estrogen in food and has the advantages of high detection speed, high accuracy and sensitivity and low cost.

The invention discloses a multi-element structure composite conductive filling material. A surface of lightweight inorganic powder (hollow glass beads, mica, carbon fibers, flake graphite and the like) is plated with a layer of wave absorbing magnetic material (Ni, Fe, Co, Ni-P, Co-P, Ni-Co-P, Co-W-P, barium ferrite, ferriferrous oxide, carbonyl iron and the like), and then is plated with a layer of conductive material (such as metal of silver, nickel, copper and the like or inorganic oxides of doped tin oxide, doped indium oxide, doped zinc oxide, titanium dioxide and the like), and a novel multi-element structure composite conductive filling material-inorganic powder core / magnetic material coating layer / conductive material coating layer is prepared. The electromagnetic shielding performance of the composite conductive filling materials can be raised further by utilization of wave absorbing performances of the wave absorbing material to electromagnetic waves and the reflection performances of the conductive material to electromagnetic waves. The composite conductive filling material has advantages of light weight, low cost, wide shield frequency band, good shielding properties and the like, and has great application values in the electromagnetic shielding composite material field.

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 belongs to the technical field of functional material and particularly relates to a magnetic mesoporous titanium dioxide core-shell type compound microsphere as well as a preparation method and applications thereof. The core-shell type compound microsphere takes a ferroferric oxide nano particle cluster as the core and takes mesoporous titanium dioxide with high crystallinity as the shell. The preparation method comprises the following steps: firstly, preparing the ferroferric oxide nano particle cluster with stable citric acid, secondly, wrapping the surface of the cluster with an amorphous titanium dioxide shell through a sol-gel method, and finally, obtaining the magnetic mesoporous titanium dioxide core-shell type compound microsphere through hydro-thermal treatment. By being provided with the mesoporous titanium dioxide shell with high crystallinity, the compound microsphere has the characteristics of high selectivity, high enrichment capacity, high sensitivity and high recovery rate to phosphoeptide; and since a magnetic core exists, the microsphere enriched in phosphoeptide can be separated by magnetism quickly and very conveniently. The method provided by the invention has the advantages that the operation is simple, the process is controllable, and the prepared compound microsphere can be used for analyzing and identifying phosphoeptide with ultra low concentration in a biological sample.

The invention belongs to the field of water treatment material preparation and in particular relates to a preparation method and application of a silane coupling agent modified magnetic halloysite material. The method is characterized by taking halloysite as a template and adhering Fe3O4 particles to the surface of a halloysite nanotube by an in-situ synthesis method; mixing a silane coupling agent with halloysite / Fe3O4 and grafting the silane coupling agent onto the surface of halloysite through reaction. The method has the beneficial effects that the raw materials are cheap and accessible; a functional group on the surface of the silane coupling agent modified magnetic halloysite material obtained by the method is bonded with a matrix via chemical bonds, so the material has strong bonding force; the material has high thermal stability, is convenient and fast to separate and recover, can be recycled multiple times, can serve as an adsorbent for eliminating heavy metal pollution of printing and dyeing wastewater and enables that the treated printing and dyeing wastewater can reach the national wastewater discharge standards.

The invention relates to a method for preparing a drug carrier based on a magnetic carbon quantum dot / chitosan composite microsphere. The method specifically comprises the following steps of: (1) carrying out a coprecipitation reaction on bivalent and trivalent iron salts in an alkaline aqueous solution so as to prepare nano magnetic ferroferric oxide; (2) carrying out microwave radiation reaction on a glucose and polyethylene glycol mixed solution to prepare carbon quantum dots, and forming magnetic carbon quantum dot composite particles through electrostatic adsorption; (3) reacting the chitosan which is dissolved in a mixed solution of sodium methoxide / absolute methanol with nitric oxide in a high-pressure kettle, and forming a chitosan-nitric oxide addition product; and (4) dropwise adding the magnetic carbon quantum dots into the addition product, and forming the magnetic carbon quantum dot / chitosan composite microsphere through electrostatic adsorption. Compared with the prior art, the method is simple, rapid, low in cost, and the prepared product can be developed into the drug carrier which integrates magnetic targeting, fluorescence imaging or tracing, nitric oxide in-situ release and fluorescence detection.

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 relates to magnetic silicon dioxide microspheres modified with diethylaminoethyl on the surface and a preparation method and an application thereof; the sol-gel method is adopted to prepare magnetic silicon dioxide microspheres which have ferroferric oxide nanoparticles as cores and silicon source, namely tetraethoxysilane as shells; by adopting the microspheres as template, alkylene oxide coupling agent 3-glycidoxypropyltrimethoxysilane (GPTMS) as activator and diethylaminoethyl hydrochloride as functional group, the magnetic silicon dioxide microspheres modified with diethylaminoethyl (DEAE) on the surface are prepared. The method comprises the preparation of magnetic silicon dioxide microspheres, the epoxidation of magnetic silicon dioxide microspheres and the DEAE surface modification. The method solves the problems that the bindingability between the existing magnetic microspheres and nucleic acid is not high, the preparation processes are complicated and the like. The bindingability between the magnetic microspheres prepared by the method and nucleic acid is high so as to be used to separate nucleic acid from the biological sample.

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 discloses magnetic aerogel and a preparation method thereof. The preparation method comprises the following steps: loading ferroferric oxide magnetic nanoparticles by taking graphene oxide as a carrier, improving the morphological stability by taking a carbon nano tube as a framework or by using a calcium ion cross-linking effect, freezing and drying to obtain graphene oxide magnetic aerogel, and performing chemical reduction so as to obtain the graphene magnetic aerogel. On the basis of maintaining the ferroferric oxide magnetic effect, the aerogel also has the advantages of low density, great strength, high-temperature resistance and large specific surface area; due to the structure characteristic, the aerogel has the super strong absorption capacity, wave absorption capacity and conductivity; the magnetic aerogel can be used in the fields of sewage treatment, target administration, wave absorption materials and photoelectric materials. The magnetic aerogel is a novel functional magnetic material.

The invention discloses a preparation method of a ferroferric oxide / chitosan / TiO2 ternary nanocomposite photocatalysis material, belonging to the technical field of treatment of environmental pollution. The method comprises the following steps of: (1) synthesizing nano ferroferric oxide; (2) preparing a ferroferric oxide / chitosan composite carrier; and (3) preparing a ferroferric oxide / chitosan / TiO2 nanocomposite photocatalysis material. The ferroferric oxide / chitosan / TiO2 ternary nanocomposite photocatalysis material prepared with the method has the advantages of easiness and convenience foroperating, stable performance, high synthesis safety, environmental friendliness and the like, and has a very high practical value; a new prospect is opened up for the development of the TiO2 nanocomposite photocatalysis material; the photocatalysis material can be used for treating organic and inorganic waste water on the aspect of waste water treatment; and in the biological medicine field, thephotocatalysis material can be used for purifying and recovering proteins and releasing and targeting medicaments.

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 magnetic nano-adsorbent and a preparation method thereof. The method comprises the following steps: (1) preparing magnetic nano-ferroferric oxide through a coprecipitation method; (2) according to a certain mass proportion, adding the ferroferric oxide, dopamine and polymine into a buffer solution, stirring and reacting for a certain period of time, and after a reaction is finished, cleaning and drying to obtain the magnetic nano-adsorbent. The magnetic nano-adsorbent prepared by the method of the invention has an excellent adsorption effect for anionic dyes, and meanwhile, the magnetic nano-adsorbent has relatively higher alkali resistance and cyclic regeneration capacity. At the same time, the magnetic nano-adsorbent prepared by the invention is capable of selectively adsorbing anionic fractions in a mixed solution.

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 discloses carbon-coated hollow ferriferrous oxide and an application thereof. The preparation method of the carbon-coated hollow ferriferrous oxide comprises the following steps of: (1) adding a ferric salt into a solvent and dissolving the ferric salt, wherein the solvent is a mixture of water and ethanol; implementing a hydrothermal reaction in a sealed hydrothermal kettle for 20-30hours at 100-250 DEG C, and separating to obtain a ferric oxide deposit; and (2) uniformly mixing the ferric oxide deposit with a reducing carbon source, wherein the reducing carbon source is one substance or a combination of multiple substances selected from carbon powder, glucose, polyethylene, acetylene black and starch; and implementing an insulating reaction for 0.5-4hours in a muffle at 200-1000 DEG C, to obtain the carbon-coated hollow ferriferrous oxide. The carbon-coated hollow ferriferrous oxide, used as a lithium ion battery negative electrode material, can remarkably improve electrical conductivity and keeps a stable structure, so that a comparatively high capacity retention ratio is still guaranteed after several charge-discharge cycles.