198 results about "Tris(acetylacetonato)iron(III)" patented technology

The invention relates to a preparation method of a nanometer carbon fiber material containing iron oxides, which is characterized in that wood fiber resources are used as raw materials, and the method comprises the following steps: extracting lignin from wood fibers by a boiling process, removing impurities in the lignin by an organic solvent extraction method, mixing the purified lignin, high-molecular polymer, the organic solvent, and ferric acetylacetonate and dissolving, continuously injecting the mixed solution into a high pressure electrostatic spinning device, performing spinning to obtain nanometer fibers, finally preoxidizing the obtained nanometer fibers in air, and performing high temperature carbonization in the presence of protective gas to obtain the C / Fe3O4 nanometer fibers. The invention has cheap and easily available raw materials, a simple preparation process, easy operations, and good repeatability, and is easy to realize large scale production.

The invention provides a preparation method of an iron, cobalt and nitrogen co-doped hierarchical pore carbon nanosheet oxygen reduction catalyst. According to the method, a ZnO nanosheet is taken asa template and a zinc source, 2-methylimidazole is taken as organic ligand, iron acetylacetonate is taken as an iron source, cobalt salt is taken as a cobalt source, and a core-shell structure ZnO@Zn / Fe / Co-ZIF precursor taking the ZnO nanosheet as a core and trimetallic hybrid zeolitic imidazolate skeleton compound Zn / Fe / Co-ZIF as a shell is obtained through the regulation of the ratio of the cobalt source to the iron source and adoption of a solvothermal method. ZnO@Zn / Fe / Co-ZIF is subjected to high-temperature calcinations in inert atmosphere, and the iron, cobalt and nitrogen co-doped hierarchical pore carbon nanosheet oxygen reduction catalyst is directly obtained. The method has the advantages that acid pickling is not required to remove a core layer template, an obtained carbon nanosheet is high in specific surface area, has a hierarchical pore structure, is rich in catalytic activity sites, and shows higher oxygen reduction catalytic activity than that of an iron and nitrogen doped carbon nanosheet and a cobalt and nitrogen doped carbon nanosheet.

The invention discloses a preparation method of RGD-modified ultra-small magnetic iron oxide nanoparticles. The preparation method comprises the following steps: preparing ultra-small magnetic iron oxide nanoparticles by taking ferric acetylacetonate as a reaction raw material and a precursor, taking oleylamine as a surfactant and a reducing agent and taking dibenzyl ether as a solvent; replacing oleylamine molecules wrapped on the surfaces of the nanoparticles by utilizing dopamine-modified HOOC-PEG-COOH to realize PEG-modification of the surfaces of the nanoparticles; and finally, chemically coupling RGD cyclic peptide by virtue of free carboxyl at the tail end of the PEG to obtain the RGD-modified ultra-small magnetic iron oxide nanoparticles. The method of synthesizing the ultra-small magnetic iron oxide nanoparticles has the characteristics of a simple process, a high raw material conversion ratio, strong repeatability and the like. The synthesized magnetic iron oxide nanoparticles have the characteristics of a regular morphology, an ultra-small dimension, good stability, good monodispersity, high biocompatibility, and tumor specific targeting, and the like, and can be used as a T1-weighted imaging high-performance magnetic resonance imaging contrast agent with a tumor active targeting function.

The new method for preparing high crystallinity monodisperse water-soluble magnetic nano microparticles is characterized by that it selects the inorganic iron salts of anhydrous iron trichloride and iron chloride, etc. or metal organic iron compounds (such as iron pentacarbonyl, iron triacetylacetonate, iron biacetylacetonate, complex of cupferron and iron salt, iron octoate and ferric oxalate, etc.) as iron raw material, and utilizes high-temp. decomposition of them in high boiling point polar solvent (for example alpha-pyrrolidone and its derivatives (N-methyl-2-pyrrolidone and N-ethyl-2-pyrrolidone, etc.), N,N-dimethyl-2-imidazolone, hexametapol, gamma-butyrolactone and its derivative and low molecular weight (molecular weight M is less than or equal to 5000) polyglycol and its derivatives) to prepare magnetic nano microparticles. Said invention can adopts different iron raw materials and high boiling point polar solvents so as to obtain different types of magnetic nano microparticles (Fe, Fe2O3 and Fe3O4) with different sizes and crystallinities and different crystal structures.

The invention discloses a preparation method of a zinc ferrite nano-material and belongs to the technical field of nano-material preparation. The ZnFe2O4 nano-material is prepared in the way that a solvothermal method is adopted to prepare a metal-organic precursor material, and then a high-temperature calcining method is adopted for treatment. The zinc ferrite nano-material is prepared by the following steps: zinc nitrate hexahydrate, ferric acetylacetonate, terephthalic acid and polyvinylpyrrolidone are dissolved in a N,N-dimethylacetamide and ethyl alcohol mixed solution; stirring is performed at the room temperature, an obtained turbid liquid is transferred into a reaction kettle, heating is performed under a certain temperature condition, and centrifugal separation and vacuum drying are performed to obtain a precursor Fe III-MOF-5 nano-material; and high-temperature calcination is performed at a certain temperature to obtain the ZnFe2O4 nano-material. The preparation method is simple, green, pollution-free and high in degree of practicability, and the prepared ZnFe2O4 nano-material can directly serve as a gas-sensitive material for use.

The invention relates to ceramic with a three-dimensional decoration effect and a preparation method thereof. A distributor is firstly utilized to distribute powder into a pattern corresponding to an ink-jetted pattern on the surface; a body is then formed by pressing; the surface of the body is then covered by a layer of overglaze paste with coloring auxiliary after drying, and permeating ink is then jetted after the body is dried again; the body is then fired, and thereby the ceramic is produced; in a ceramic tile, the permeation depth of the permeating ink in the overglaze layer is 0.2mm to 0.5mm; the permeating ink is oil-based ink containing a transitional metal complex, wherein the transitional metal complex comprises nickel carbonyl, iron pentacarbonyl, chromium hexacarbonyl, titanium hexacarbonyl, dicobalt octacarbonyl, titanium(IV)-oxy acetylacetonate, vanadium(IV)-oxy acetylacetonate, chromium acetylacetonate, cobalt acetylacetonate, praseodymium acetylacetonate and iron acetylacetonate. An oil-based system is adopted as the ink, a high-permeability organic solvent with small molecular volume and low surface tension is adopted as a permeation promoter to replace water, and the osmotic gradient of coloring salt is small.

The invention relates to a method for preparing and separating monodisperse superparamagnetism iron-nickel alloy nano-particle catalyst used for selective hydrogenation. In the method, Ferric acetylacetonate and Nickel acetylacetonate are taken as raw materials, liquid paraffin is taken as reaction medium, trioctyl-phosphine and oleyl amine are taken as stabilizer (also called protecting agent or surface modifier) and polyol is taken as morphology modifier. The product obtained is iron-nickel alloy nano-particle. The method adding magnetic field to assist solvent extraction can separate the iron-nickel alloy nano-particle from the reaction system. The iron-nickel alloy nano-particle can be dispersed into organic solvents again such as chloroform, petroleum ether, and the like, without the generation of precipitation. The nano-particle is used as the catalyst for the selectively hydrogenation of chloro-nitrobenzene, the convention rate of reactants can reach 70 percent and the selectivity thereof is 98 percent.

The invention discloses a liquid nano-catalysis desulfurizer for a new dry process cement kiln and a preparation method thereof. The liquid nano-catalysis desulfurizer, which is prepared from nano cerium oxide, nano thorium oxide, nano titanium oxide, nano nickel oxide, nano calcium oxide, nano calcium carbonate, carbomite, potassium permanganate, sodium bismuthate, AEO9, octyl phenol polyoxyethylene ether, PEG 200, polymaleic acid, fatty acid polyglycol ester, and diethylene glycol; the allowance is water. In the technical scheme, europium oxide, ferric acetylacetonate and polyoxyethylene ether are added. The desulfurization degree of the liquid nano-catalysis desulfurizer is 100%; sulfur dioxide in smoke gas can be discharged to zero.

The embodiment of the invention discloses a method for preparing an iron-nickel alloy nanocluster-graphene composite material. The method includes the following steps that (1), graphite oxide is added into a first organic solvent to be dispersed; (2), ferric acetylacetonate, nickel acetylacetonate and octadecylamine are added, the mixture is heated to 100 DEG C to 150 DEG C in inertia protective gas, the temperature is kept for 20 min to 50 min, and then the temperature rises till a solution is boiled and flows back, and is kept for 1 h to 5 h; and (3), a second organic solvent is added to suddenly stop the reaction, and reaction products are separated out, washed and dried. The invention further discloses the iron-nickel alloy nanocluster-graphene composite material prepared through the method, and application of the composite material to electromagnetic wave absorption. According to the method, the iron-nickel alloy nanocluster-graphene composite material and the application, graphene is used as a substrate, the iron-nickel alloy nanocluster-graphene composite material is obtained through one-step reduction of a thermal decomposition method, and therefore iron-nickel alloy nanoparticles are protected and dispersed, and the nanometer composite material good in wave absorbing property is obtained.

The invention provides a method for preparing water-soluble nanometer iron oxide. The method comprises the following steps of: pyrolyzing iron acetylacetonate (III) by using alcohol to obtain iron oxide nanoparticles, and adding a ligand aqueous solution at room temperature to obtain the water-soluble nanometer iron oxide. The preparation method is simple, conditions are mild, the required equipment is simple, and batch production can be realized; and the nanoparticles prepared by the method have the size of 5 to 15nm, superparamagnetism, and wide application prospects in the field of biomedicine such as nuclear magnetic resonance imaging, magnetic thermal therapy, catalysis and the like.

The invention discloses an In2O3 / ZnFe2O4 nanometer heterojunction composite photocatalytic material and a preparation method thereof and belongs to the technical fields of photocatalytic materials and environmental pollution improvement. The preparation method comprises the steps of firstly, preparing monodispersed In2O3 nanospheres through a hydro-thermal method; then adding ferric acetylacetonate, zinc nitrate and terephthalic acid to a mixed solution of absolute ethyl alcohol and N, N-dimethyl formamide, conducting sufficient stirring, then adding the In2O3 nanospheres to the mixture, and finally conducting a solvothermal reaction, centrifugation, drying and calcining, so that the nanometer heterojunction composite photocatalytic material is obtained finally. By means of obtained In2O3 / ZnFe2O4 nanometer heterojunction, the spectrum response range of In2O3 is enlarged, furthermore, separation efficiency of photogenerated charges is improved, and good application value and prospect are achieved in the field of photocatalytic degradation of organic pollutants. Raw materials used in the preparation method are low in price and easy to obtain, the reaction condition is easy to control, operation is simple, the equipment requirement is low, and environmental protection is achieved.

The invention discloses an iron catalysts for polyolefine activated by the imine compounds, which comprises bridge-linked bis (imino) pyridyl compound in the structural formula (I) of the instruction book and FeAA or acetylacetone ferrous iron and MAO or alkyl aluminium compound. When carrying out the polymerization of the polyethylene, the high molecular weight polyethylene with molecular weight distribution from the singlet to the doublet can be gained by changing the polymerization condition. In the polyethylene with doublet distribution, the small molecular weight is obviously smaller than the occupied proportion of the large molecular weight, that is, the large molecular weight is dominant. The doublet molecular weight distribution can embody the good processability and can keep stronger mechanical property.

The invention discloses a method for in-situ preparing an iron and copper dual-metal loaded carbon nano-fiber composite material. According to the method, ferric acetylacetonate serving as an iron source, cupric acetate serving as a copper source and polyacrylonitrile serving as a carbon source are used for preparing copper iron salt-containing polyacrylonitrile fibers by utilizing an electrostatic spinning method; after the copper iron salt-containing polyacrylonitrile fibers are carbonized at high temperature in inert gas, the iron and copper dual-metal loaded carbon nano-fiber composite material is in-situ prepared by utilizing carbon thermal reduction. According to the method, the operation is simple and convenient, the cost is low, the equipment requirement is low, and the regulation for a material structure is strong. The iron and copper dual-metal loaded carbon nano-fiber composite material has a high specific surface area, and has excellent catalytic degrading performance for orange II and other dyes.

The invention discloses a preparation method of an FeS / RGO nano composite sodium-ion battery negative electrode material. The preparation method comprises the following steps: dissolving oxidized graphene into deionized water to prepare a solution, and carrying out ultrasonic treatment to obtain a turbid liquid in which the oxidized graphene is dispersed uniformly; adding ferric acetylacetonate into acetone, carrying out ultrasonic treatment until the ferric acetylacetonate is dissolved, and then adding the solution into the turbid liquid to obtain a mixed solution of ferric salt and the oxidized graphene; heating and evaporating the mixed solution of ferric salt and the oxidized graphene until the acetone is completely evaporated, and carrying out heating vulcanization after freeze drying. According to the preparation method, the oxidized graphene is creatively introduced into the battery negative electrode material, through the control in the heating vulcanization process, the crystallization behavior of transition metal sulfide is changed, namely generated ferric sulfide particles or sheets are stably anchored on the oxidized graphene layer through heating vulcanization to form a novel composite structure, volume expansion of sodium ions in insertion and extraction process is relieved, the pulverization of the material is inhibited, and the cycling stability is improved.

The invention relates to an aurum-ferric oxide / titanium dioxide nano-catalyst and a preparation method thereof, in particular to an Au nano-catalyst. The invention provides the aurum-ferric oxide / titanium dioxide nano-catalyst which has better heat stability and higher activity, and the preparation method thereof. The aurum-ferric oxide / titanium dioxide nano-catalyst has the general formula of Au-Fe3O4 / TiO2. The preparation method comprises: 0.5-1.5g of H AuCl4 is added into 100ml of chloroform solution]; then, 10-30ml of oleamide is added into the solution and 0.25-0.75g of tert-butyl amine borane is added into the solution so that Au nano-particles can be obtained; after that, the Au nano-particles and acetylacetone iron are added into oleic acid oleamide solution for reaction so that Au-Fe3O4 nano-particles can be obtained, and the mother liquid is reserved for standby application; the mother liquid is added with 0.05-1.6ml of titanium 4-butanol, and solid product can be obtained after decomposition; and the solid product is calcined, and the aurum-ferric oxide / titanium dioxide nano-catalyst is obtained.

The invention relates to a method for preparing a CNT / Fe3O4@ZnO one-dimensional nanocomposite by a polyol one-pot method. The method comprises the following steps: 1, weighing and then mixing a multiwall nanotube, ferric acetylacetonate and triethylene glycol, then carrying out ultrasonic dispersion on the mixture until the mixture is uniform, then introducing argon, then heating the mixture to the boiling point of triethylene glycol and then carrying out reflux; and 2, then cooling the product to the room temperature, then throwing zinc acetate, then slowing heating the mixture to the boiling point of triethylene glycol, then carrying out reflux, carrying out magnetic separation after cooling, washing the product with ethanol and drying the product to obtain the CNT / Fe3O4@ZnO composite. The composite is applied in the fields of photoelectric device assembly and photocatalysis.

The invention relates to a contrast agent and particularly relates to a dual-mode synergistically-enhanced magnetic-resonance contrast agent and a method for synthesizing the same. The dual-mode synergistically-enhanced magnetic-resonance contrast agent is synthesized in one pot by taking the compound of a contrasting material T1 and a contrasting material T2 as a reaction precursor. The method comprises the following steps of: dissolving gadolinium oleate or gadolinium acetylacetone and ferric oleate or ferric acetylacetonate into octadecene or benzyl ether, adding oleic acid, heating an obtained solution, carrying out reflux reaction to obtain a reaction solution, cooling to room temperature, adding a first solvent to precipitate a product of reaction, centrifuging, removing a supernate, and dissolving a precipitate into a second solvent. The method is simple in steps, is convenient to operate, ensures high yield and is suitable for large-scale preparation. The idea of doping and synthesizing ensures that the field directions of the contrasting material T1 and the contrasting material T2 are parallel and same in the external magnetic field. The dual-mode contrast agent synthesized from the contrasting material T1 and the contrasting material T2 has the capacity of making two imaging modes complementary to each other and can obtain two imaging results nearly at the same time in the same place under the same resolution.

The invention discloses an efficient air purification type photocatalyst filter screen. The efficient air purification type photocatalyst filter screen comprises a filter screen base material; a photocatalyst is arranged on the filter screen base material; the photocatalyst is prepared from the following components: titanium dioxide, molybdenum oxide, cerium oxide, lanthanum oxide, nickel oxide, platinum oxide, silicon dioxide, nano tin dioxide, silica gel power, aluminum oxide, sepiolite, iron acetylacetonate and terpyridine ruthenium chloride. The photocatalyst filter screen prepared by the invention has a good adhesion property and a relatively large reaction contact area; the removing rates of acetaldehyde, benzene and formaldehyde are more than 90 percent and the photocatalytic property is very good; the efficient air purification type photocatalyst filter screen is high in utilization rate of catalyst and stable in property and has very good application value.

The invention belongs to the technical field of chemical test and analysis, and in particular relates to a test strip suitable for fast testing a gossypol, and a preparation method and an application thereof. The preparation process of the test strip of the invention includes the preparation of a test reagent box and a standard gossypol colorimetric card which is matched with the box to use. The core reagent includes color development reagent, namely acetylacetone iron or ferric trichloride or iron sulfate, a mixed acid solution of hydrochloric acid and glacial acetic acid, complexing agent, namely o-phenanthroline and immobilization agent ludox or soluble starch. The standard gossypol colorimetric card which is matched with the test strip of the invention to use displays the color by a 10-point standard gossypol solution and the test strip, and has different color grades. The test strip of the invention is applicable to the fast test of the gossypol in various cottonseed products, and has the outstanding advantages of simple method, sensitive test and convenient popularization.

The invention belongs to the technical field of hydrogen evolution electrocatalysis and discloses an iron disulfide / nitrogen-doped graphene nanocomposite, preparation and application. A preparation method includes the following steps that an iron disulfide precursor solution is mixed with graphene oxide, a hydrothermal method reaction is carried out, and the iron disulfide / nitrogen-doped graphene nanocomposite is obtained. L-cysteine is adopted as a sulfur source and a reducing agent, ammonia water serves as a nitrogen source, ferric acetylacetonate serves as iron salt, a FeS2 nanocube is subjected to homogeneous nucleation growth on an NG surface through a hydrothermal method, and the FeS2 / NG nanocomposite is obtained, wherein the nitrogen content ranges from 0.38 wt% to 1.12 wt%; and by means of good hydrogen evolution electrocatalysis performance of iron disulfide and high specific surface area and high conductivity of nitrogen-doped grapheme, a good electrocatalysis hydrolysis hydrogen production effect is shown, and the nanocomposite can be applied to the field of hydrogen evolution electrocatalysis, especially preparation of hydrogen evolution electrocatalysis materials and can be directly used as an electrode material for electrocatalysis hydrolysis hydrogen production.

The invention discloses a preparation method of a magnetic iron oxide nanoparticle capable of stably dispersing in water. The preparation method provided by the invention comprises the following steps of weighing 10 to 30g of triethylene glycol or polyethylene glycol having molecular weight of 600 to 20000 or polyethylene glycol monomethyl ether having molecular weight of 600 to 20000, adding 0.15 to 3g of an additive into the 10 to 30g of triethylene glycol or polyethylene glycol having molecular weight of 600 to 20000 or polyethylene glycol monomethyl ether having molecular weight of 600 to 20000, putting the mixture into a three-neck flask, putting the three-neck flask with the mixture on a temperature-control magnetic stirrer, heating the mixture to a temperature of 70 to 90 DEG C, adding 0.1 to 3g of analytically pure iron acetylacetonate into the mixture, stirring for 5 to 15 minutes by a magnetic stir bar, wherein in heating, flowing argon is fed into the three-neck flask for protection, heating to a temperature of 150 to 320 DEG C, keeping the temperature for 20 to 600 minutes by heating, cooling to a temperature below 60 DEG C, adding 50 to 70ml of analytically pure toluene or acetone into the three-neck flask, carrying out magnet adsorption, washing by analytically pure acetone twice, and dissolving precipitates obtained by the previous step in water to obtain the magnetic iron oxide nanoparticles having sizes of 3 to 50nm. The preparation method provided by the invention has simple processes and is conducive to production. The magnetic iron oxide nanoparticle obtained by the preparation method can be utilized for the fields of biotechnology, medicine, catalysis and mechanical lubrication.

The invention discloses a method for synthesizing a three-dimensional porous ferric oxide nano rod cluster. The method comprises the following steps of: reacting by using diphenyl ether, [omim][BF4] and ferric acetylacetonate as raw materials to prepare FeF2 with certain appearances, and roasting the FeF2 to obtain the ferric oxide nano rod cluster with a three-dimensional porous structure. The temperature required by decomposing the ferric acetylacetonate in the [omim][BF4] to generate FeF2, and the reaction time are controlled, so the FeF2 with different appearances can be obtained; and the Fe-F bond is converted into a Fe-O bond by roasting; and the method for synthesizing the three-dimensional porous ferric oxide nano rod cluster is novel, and simple and is easy to control.

The invention discloses a method for preparing Fe2O3 / V2O5 composite fibers with an electrostatic spinning method. The method includes that acetyl acetone vanadium and ferric acetylacetonate are taken as precursors, an organic solvent such as absolute ethyl alcohol is a solvent, solution viscosity is regulated through polyvinylpyrrolidone (PVP), and the nanofibers are prepared with the electrostatic spinning technology prior to being calcinated at high temperature to obtain Fe2O3 / V2O5 composite nano fiber materials. The fiber materials are continuously uniform, small in fiber diameter, large in specific surface area, simple in preparing process and convenient to operate, and the prepared Fe2O3 / V2O5 composite fibers are high in photocatalytic property in visible light.

The invention discloses an amino functionalized superparamagnetism carbon nanosphere and a preparation method of the amino functionalized superparamagnetism carbon nanosphere. The nanosphere comprises a core and an outer layer, wherein the core is wrapped by the outer layer; the nanosphere is characterized in that the core is a ferroferric oxide nano particle, the outer layer is a carbon shell layer, and an amino is connected onto the carbon shell layer. Compared with the prior art, dicyclopentadienyl iron and ferric acetylacetonate are taken as aniron source, a cane sugar or glucose is taken as a carbon source, then the iron source and the carbon source react in a polyethylene glycol or tetraglycol solution, so that the superparamagnetism carbon nanosphere with rich amines on the surface and a core-shell structure is obtained, and the prepared magnetism carbon nanosphere is widely applied to the fields of biology, catalysis, analysis, energy sources, and information storage. Equipment needed in the preparation process is cheap, the reaction raw materials and the solvent are safe and free from toxic, the prepared nanosphere is economical and environment-friendly, is wide in practicality and has wide application prospect.

The invention provides a preparation method of straw-based magnetic charcoal. The method includes the following steps that (1) straw is cleaned, naturally air-dried, dried in a drying oven, smashed and sieved, and straw powder is obtained; (2) the straw powder is pre-carbonized in a muffle furnace, washed and dried, and a straw-based pre-carbonized product is obtained; (3) the straw-based pre-carbonized product is put in a tube furnace, argon is fed, pyrolysis is performed at the temperature of 400-500 DEG C for 2-3 hours, cooling is performed till the temperature reaches the room temperature,washing is performed till the product is neutral, drying and grinding are performed, then sieving is performed, and straw-based charcoal is obtained; and (4) the straw-based charcoal and oleylamine are put in a reaction kettle for uniform mixing and ultrasound treatment, ferric acetylacetonate is added into a mixed solution, the mixed solution is stirred uniformly, a liquid product is obtained, ablack substance is separated out after centrifugation is finished, and the straw-based magnetic charcoal is obtained. Compared with original charcoal, the prepared straw-based magnetic charcoal has the advantages of being better in thermal stability and larger in specific surface area, and medium and large pores in the pore structure of the straw-based magnetic charcoal prevail.

The invention relates to a magnetically-recoverable GO / Fe3O4-CuI catalyst and a preparation method and application thereof. The amount of supported Cu + in the GO / Fe3O4-CuI catalyst is 10-11% by weight, the GO / Fe3O4-CuI catalyst is prepared by adding graphene oxide powder into 2-pyrrolidone, then adding a ferric triacetylacetonate solution after ultrasonic processing, performing stirring and reflux reaction to produce a black precipitate GO / Fe3O4, adding the black precipitate and CuI into anhydrous ethanol and performing magnetic stirring reflux, the prepared GO / Fe3O4-CuI catalyst can be used for catalytic reaction of o-halogen benzamide and amino acid to generate a quinazolinone compound. Compared with the prior art, the catalyst is simple in preparation, high in catalytic activity and high in recovery rate, and the high catalytic performance of the recovered catalyst is still kept.

The invention relates to a surface modification method of magnetic iron oxide nano-particles. The method comprises the following steps: leading mixed solution consisting of iron acetylacetonate and triethylene glycol to react for a period at low and constant temperature, quickly heating to boil, and cooling to room temperature after the mixed solution reacts for a period to obtain a reaction solution; precipitating, magnetically separating and cleaning the reaction solution to obtain magnetic Fe3O4 nano-particles carrying hydroxyl on the surface; dispersing to dried toluene by ultrasonic, adding 2-(4-benzene sulfonyl chloride) trichlorosilane to obtain Fe3O4 nano-particles carrying a specific initiation group; and dispersing to mixed solution of water and ethanol by ultrasonic, and adding2,2'-bipyridyl, copper chloride, cuprous chloride and 2-(meth)acryloyloxyethyl phosphorylcholine to obtain phosphorylcholine polymer modified magnetic Fe3O4 nano-particles. The method is mild in reaction conditions, simple and feasible and strong in controllability; and the prepared magnetic Fe3O4-phosphorylcholine polymer nano-composite material has excellent stability and biocompatibility in aqueous solution.

The invention discloses a zinc ferrite material and a preparation method thereof, and belongs to the field of magnetic materials. The preparation method comprises the following steps of preparing materials, wherein raw materials comprise ferric acetylacetonate, zinc acetylacetonate, a surfactant and a solvent, the solvent is benzyl ether or 1-octadecene or oleylamine, the mole ratio of the zinc acetylacetonate to the ferric acetylacetonate is 0.1-0.8, the mole ratio of the total amount of the ferric acetylacetonate and the zinc acetylacetonate to the surfactant is 0.01-0.85, and the quantity of the solvent is determined in a manner that the ferric acetylacetonate and the zinc acetylacetonate can be fully dissolved by the solvent; placing the raw materials in protective gas environment, and performing uniform mixing at room temperature; and then performing low-speed warming, performing quick-speed warming, and performing cooling so as to obtain resultant granules namely the zinc ferrite material. The zinc ferrite material prepared by the method disclosed by the invention has extra-high saturation magnetization intensity, and can maintain favorable magnetic properties after being subjected to high temperature calcination.

Hierarchical porous carbon nanofiber / sulfur composites (HPCNF / S), useful in the manufacture of lithium sulfur batteries are formed of a cathode having a hierarchical porous carbon nanofiber / sulfur (HPCNF / S) composite, a conductive additive, polyvinylidene fluoride binder and a foil current collector. The HPCNF is formed by electrospinning polyacrylonitrile / iron (III) acetylacetonate neat fibers from polymer precursor, stabilizing, carbonizing and acid etching to form porous CNFs, effecting chemical activation of porous CNF to form hierarchical porous carbon nanofibers (HPCNFs) and effecting encapsulation of sulfur in pores of HPCNFs by melt-diffusion. When used as a battery, the HPCNF / Scomposite functions as a cathode.