52848 results about "Mixed solution" patented technology

Method for producing an hydrophobically associative polymer is provided which is characterized by forming a monomer solution comprising a surfactant, at least one hydrophobic ethylenically unsaturated monomer, at least one hydrophilic monomer selected from nonionic ethylenically monomers, cationic ethylenically unsaturated monomers, anionic ethylenically unsaturated monomers or mixtures thereof, and water; forming a salt solution comprising a multivalent salt and water; mixing the monomer solution and salt solution to form a mixed solution; and charging the mixed solution with an initiator, thereby polymerizing the monomers to form the hydrophobically associative polymer in a dispersion. Aqueous dispersion containing the hydrophobically associative polymer formed by the method. The aqueous dispersion containing the hydrophobically associative polymer may be used in a paint formulation, in a mobility control fluid useful in enhanced oil recovery, in a secondary or tertiary oil recovery system, in an enhanced oil recovery method, in a cementious composition, in an oil well drilling mud formulation, in a fracturing fluid formulation, in a wastewater treatment system, or in a dewatering sludge system.

The present invention relates to a preparation method for a nickel-manganese-cobalt anode material of a lithium ion battery. According to the present invention, in the presence of nitrogen atmosphere, a mixed solution containing nickel iron, manganese iron and cobalt ion reacts with a precipitating agent, then processes of aging, washing, drying and the like are performed to obtain a nickel-manganese-cobalt hydroxide precursor, the synthesized precursor material has spherical morphology, ideal particle size distribution and high tap density; the precursor, a lithium compound and a doped compound are mixed, then the sintering processing is performed for twice to prepare the nickel-manganese-cobalt three-element composite anode material. The method has characteristics of simple synthesis process, easy process controlling, low energy consumption, high efficiency and low cost, and is applicable for the industrial production; the prepared precursor material has characteristics of spherical morphology, uniform particle distribution and high tap density; the discharge capacity of the battery is improved through doping the metals; the cycle performance of the battery is stable.

The invention relates to a polyether class polycarboxylic acid high-efficiency water reducing agent and a preparation method thereof, belonging to the field of concrete materials, structures and engineering of building materials. The polyether class polycarboxylic acid high-efficiency water reducing agent raises the temperature of water solutions of 15-55 mass percent of allyl polyethenoxy ether and 0-6 mass percent of chain transfer agent is raised to 50-90 DEG C, one side is dropwise added with a water solution of 0.01-0.9 mass percent of an evocating agent, one side is dripwise added with miscible liquids of 3-15 mass percent of unsaturated acids and one or more than one derivative thereof, the temperature is kept unchanged, and the water solution and the miscible liquids are completely dropped within 2-6 hours, the temperature is preserved for 1-6 hours and naturally cooled to room temperature, and the mixed solution is neutralized by sig water till a PH value reaches 6.8-7.2 so as to obtain the polyether class polycarboxylic acid high-efficiency water reducing agent. The polyether class polycarboxylic acid high-efficiency water reducing agent and the preparation method thereof have simple technique, low cost and good property, can effectively reduce the water-cement ratio of concrete, improves the compaction rate of a pore structure of the concrete, enhances the strength and the durability of the concrete and has great significance on enhancing the engineering quality, prolonging the service life, reducing the engineering cost, reducing the environment pollution, and the like.

A kit and for flushing a medical device a method of preparing the kit is disclosed. The kit includes a container containing a mixed solution a unit dose of a pharmacologically effective amount of an antimicrobial agent and a second agent. The mixed solution has been mixed in a carrier solution and lyophilized. The second agent is an anticoagulant, an antithrombotic agent or a chelating agent. The kit and method are useful for maintaining the patency of indwelling medical devices such as catheters and for preventing infections caused by bacterial growth in catheters.

The invention discloses a method for extracting krill oil with high phosphatide content from Antarctic krills. The method comprises the following steps: (1) drying fresh Antarctic krills to obtain dry Antarctic krills; (2) performing extraction to dry Antarctic krills for 3 times with organic solvent; (3) mixing the extracting solutions, evaporating the mixed extracting solution to obtain Antarctic krill oil with the phosphatide content of 30-35%; then introducing nitrogen or carbon dioxide to remove the residual organic solvent; and adding polar organic solvent in the Antarctic krill oil, mixing evenly, standing to ensure that the mixed solution performs natural layering; and evaporating the lower solution to obtain the Antarctic krill oil with high phosphatide content, and then introducing nitrogen or carbon dioxide to remove the residual polar organic solvent so as to obtain a product. The extraction technology is performed at a low temperature, thus the red color of krill oil can be maintained and the beneficial ingredients in the product can not be damaged. The invention has high extraction efficiency and good phosphatide accumulation effect. Therefore, the Antarctic krill oil with high phosphatide content can be obtained and other byproducts can also be obtained.

The invention discloses a super-hydrophilic and underwater-super-oleophobic oil-water separation mesh membrane, and a preparation method and an application thereof. According to the method, fabric mesh with a specification of 100-300 meshes is subjected to ultrasonic cleaning, and is air-dried under normal temperature; a hydrophilic polymer water-sensitive agent and a cross-linking agent are dissolved in water according to a ratio of 1:9-9:1; the mixture is well mixed by magnetic stirring, such that a solution with a concentration of 1-99% is prepared; nano-sol is prepared with a sol-gel method; the solution and the nano-sol are prepared into a mixed solution with a concentration of 1-99%, and the solution is well dispersed through ultrasonic dispersion; the mesh is soaked in the mixed solution and is vertically lifted, or the mesh is directly sprayed by using a high-pressure spraying gun; and the mesh is bake-dried, such that the super-hydrophilic and underwater-super-oleophobic oil-water separation mesh membrane is obtained. Contact angles of the super-hydrophilic and underwater-super-oleophobic oil-water separation mesh membrane with water and oil in air are both 0 DEG, and the membrane is super-hydrophilic. Under water, the contact angle of the membrane with oil drops is larger than 150 DEG, and the membrane has an oil drop low adhesion characteristic. The mesh membrane provided by the invention can be used in oil-water mixture separation and oil-containing sewage processing.

A method of forming an impurity-introduced layer is disclosed. The method includes at least a step of forming a resist pattern on a principal face of a solid substrate such as a silicon substrate (S27); a step of introducing impurity into the solid substrate through plasma-doping in ion mode (S23), a step of removing a resist (S28), a step of cleaning metal contamination and particles attached to a surface of the solid substrate (S25a); a step of anneal (S26). The step of removing a resist (S28) irradiates the resist with oxygen-plasma or brings mixed solution of sulfuric acid and hydrogen peroxide water, or mixed solution of NH4OH, H2O2 and H2O into contact with the resist. The step of cleaning (S25a) brings mixed solution of sulfuric acid and hydrogen peroxide water, or mixed solution of NH4OH, H2O2 and H2O into contact with the principal face of the solid substrate. The step of removing a resist (S28) and the step of cleaning (S25a) can be conducted simultaneously by bringing mixed solution of sulfuric acid and hydrogen peroxide water, or mixed solution of NH4OH, H2O2 and H2O into contact with the principal face of the solid substrate.

The invention discloses a preparation method of a novel three-dimensional nitrogen doped graphene composite material system. The method comprises the following steps: 1, uniformly dispersing graphene oxide in a solvent at room temperature, adding a selected material and a nitrogen-containing compound, and uniformly mixing to form a mixed solution; 2, reacting the mixed solution at a temperature from room temperature to 150DEG C for 0-8h; and 3, cooling the above obtained product to room temperature, centrifuging, collecting the obtained product, washing, and drying to obtain the nitrogen doped graphene composite material. The three-dimensional nitrogen doped graphene composite material system with the nitrogen content of 8-19% can be efficiently and controllably prepared through the method, and the nitrogen content of the system can be controlled by changing the kind and the amount of the added nitrogen-containing compound, the reaction temperature and the reaction time; and the method is simple, is easy to enforce, allows the yield to be greater than 98.9%, and can be widely used in fields of water treatment, biomedicines, energy generation, conversion and storage devices, electrostatic prevention, heat management, heat conduction and dissipation, sensors, electromagnetic shielding, wave absorption and catalysis.

The invention relates to a copper bismuth catalyst for combining chemically into 1, 4-butynediol with formaldehyde and ethyne and a preparation method thereof. The preparation method comprises the following steps of: preparing mixed solution which contains copper salt, bismuth salt, magnesium salt and dispersant; dropping alcoholic solution with an organic silicon source into the mixed solution; adjusting a pH value of the mixed solution with alkaline solution to obtain mixed precipitate; and further aging, washing, drying and baking in inert atmosphere to obtain the copper bismuth catalyst with C-MgO-SiO2 a carrier, in the catalyst, the content of CuO accounts for 25-50 weight percent, and the content of Bi2O3 accounts for 2-6 weight percent. The catalyst is applied in a reaction of combining chemically into 1, 4-butynediol with formaldehyde and ethyne, and has high catalytic activity and high selectivity.

The invention discloses a method for extracting tungsten, titanium and vanadium from a waste SCR (selective catalytic reduction) catalyst, which comprises the following steps: crushing the waste SCR catalyst, adding a strongly alkaline solution, and reacting; filtering, separating, then adding strong acid into the sodium tungstate and sodium vanadate mixed solution, and reacting to obtain tungstic acid and a sodium salt and vanadic acid mixed solution; regulating the pH value of the sodium salt and vanadic acid mixed solution until precipitate is separated out, thus obtaining ammonium vanadate; then adding sulfuric acid into the tungsten-and-vanadium-removed SCR catalyst, and reacting to obtain a titanyl sulfate solution and solids such as aluminum slag and the like; then adding water into the titanyl sulfate solution, and hydrolyzing to obtain titanic acid and a waste acid solution; and finally, respectively calcining the obtained ammonium vanadate, tungstic acid and titanic acid to obtain vanadium pentoxide, tungsten trioxide and titanium dioxide. According to the invention, tungsten, titanium and vanadium can be extracted from the SCR catalyst through the reaction with strong alkali and strong acid at a low temperature, the equipment requirement is low, the energy consumption is low, some products having added values can be coproduced, and no secondary pollution is generated, thereby facilitating popularization and application.

A method of producing metal nanoparticles in a high yield rate and uniform shape and size, which is thus suitable for mass production. In addition, metal nanoparticles are provided that have superior dispersion stability when re-dispersed in various organic solvents, which thus suitable for use as a conductive ink having high conductivity. The method of producing nanoparticles includes mixing a metal precursor with a copper compound to a hydrocarbon based solvent, mixing an amine-based compound to the mixed solution of the metal precursor with copper compound and hydrocarbon based solvent, and mixing a compound including one or more atoms having at least one lone pair, selected from a group consisting of nitrogen, oxygen, sulfur and phosphorous to the mixed solution of the amine-based compound, metal precursor with a copper compound and hydrocarbon based solvent.

The invention provides a preparation method of triazine structure containing benzoxazine intermediate, which sequentially includes: (1) performing synthetic reaction of aldehyde compound and amine compound at a molar ratio of at least 1:1 which includes adding aldehyde compound and solvent of at least one of clean water, methanol, ethanol, isopropanol, and ethyl acetate into a reactor at the room temperature under the normal pressure to obtain mixed solution with aldehyde mass concentration of no greater than 95%, adding amine compound while stirring, and reacting at 0-100 DEG C under the normal pressure for at least 15 minutes to obtain the reactant liquor; (2) pouring into the cleaning solution, stirring and cleaning, and filtering to collect solid substance, or directly filtering the reactant liquor to collect the solid substance; and (3) drying the solid substance obtained in step (2) at 30-100 DEG C.

The invention discloses a method for preparing nickel cobalt aluminum serving as a cathodic material of a lithium ion battery, which comprises the following steps of: mixing nickel salt solution and cobalt salt solution uniformly, adding complexing agent solution, precipitant solution and the mixed solution into a reaction kettle with base solution in a parallel flow mode to perform precipitation reaction, performing solid-liquid separation after the reaction is performed fully, and washing; adding the washed solid material into the reaction kettle, dripping aluminum salt solution and the precipitant solution slowly to perform secondary precipitation reaction, so that an aluminum element is precipitated on the surface of the solid material gradually, stirring continuously in the integral process, performing solid-liquid separation after the reaction is finished, and washing and drying the solid material to a precursor of the cathodic material of the lithium ion battery; and mixing the precursor and a lithium source, performing two-section sintering under the condition of introducing oxygen, and crushing the calcined material which is subjected to the two-section sintering and performing subsequent processing to obtain the nickel cobalt aluminum serving as the cathodic material of the lithium ion battery. The method has the advantages of low requirement on equipment, high automation degree, environment friendliness, few wastes, high quality of products and the like and is easy to operate.

The invention discloses a graphene-supported cobaltosic oxide nano composite material and a preparation method thereof. The graphene-supported cobaltosic oxide nano composite material consists of graphene and cobaltosic oxide, wherein the cobaltosic oxide is loaded on graphene nano sheets; the content of the graphene nano sheets is 2 to 95 weight percent, and the thickness of the graphene nano sheets is 0.3 to 50 nanometers; and the particle size of the cobaltosic oxide is 1 to 200 nanometers and the cobaltosic oxide is ball-shaped or flaky. The preparation method comprises: firstly, mixing solution of graphene oxide, a bivalent cobalt salt and a polymer surfactant; and secondly, mixing the solution obtained by the first step with alkaline solution added with an oxidant, stirring the mixed solution or stirring the mixed solution by ultrasonic waves for 0.2 to 5 hours, transferring the mixed solution to a high-temperature reaction kettle, annealing the reaction product at 100 to 250 DEG C for 3 to 30 hours to obtain a product and washing and drying the product to obtain the graphene-supported cobaltosic oxide nano composite material. The size of the cobaltosic oxide is controllable. The reduction of the graphene oxide and the generation of the cobaltosic oxide are accomplished at the same time.

The invention discloses preparation of a multilayer composite membrane for a secondary battery by using an electrostatic spinning coating technology combined with a pore-forming technology, a manufacturing method of the multilayer composite membrane and the secondary battery prepared by using the membrane. The method is characterized by comprising the following steps of: (1) dissolving a high-molecular organic matter into a solvent to form a high-molecular solution; (2) adding a small-molecular organic matter and / or an inorganic nanometer material into the high-molecular solution to ensure that the small-molecular organic matter is dissolved into the high-molecular solution; dispersing an inorganic nanometer material into the high-molecular solution to form an organic / inorganic mixed solution; (3) uniformly coating the formed organic / inorganic mixed solution on at least one side of a film matrix by using the electrostatic spinning coating technology to form a composite film, and drying the composite film; and (4) extracting the small-molecular organic matter from the dried composite film to continuously dry and form the multilayer composite membrane for the secondary battery. By using the method, an inorganic complex of inorganic membranes is realized quickly and conveniently, the ionic conductivity of the lithium ion battery membrane can be improved, and the heat stability and the security of the battery are guaranteed; and the method has the advantages of being simple in operation and convenient for industrialization.

The invention discloses an oxidized grapheme / polyaniline super capacitor composite electrode material and the preparation method and the application thereof. The preparation method comprise the following steps: firstly, adding oxidized graphite to water for ultrasonic dispersion so as to form an oxidized grapheme solution with uniformly dispersed single pieces; at room temperature, dropping aniline to the obtained oxidized grapheme solution for continuous ultrasonic dispersion to from a mixed solution; at a low temperature condition, adding hydrogen peroxide, ferric trichloride and a hydrochloric acid solution dropwise to the mixed solution, and stirring the solution for polymerization; and after the reaction is finished, centrifugating, washing and roasting the obtained mixed solution in vacuum to obtain the oxidized grapheme / polyaniline super capacitor composite electrode material which is used as the electrode material of an electricity storage system of a super capacitor and a battery. The oxidized grapheme / polyaniline super capacitor composite electrode material with good electrochemistry performance is obtained by the method, and the specific capacity of the oxidized grapheme and the polyaniline is greatly improved. In addition, the addition of the oxidized grapheme improves the charge and discharge service life of the polyaniline.

The invention provides a method and device for preparing 6-amino-capronitrile from caprolactam by adopting a liquid phase method. In the method for preparing the 6-amino-capronitrile, the caprolactamis taken as a raw material; the method for preparing the 6-amino-capronitrile comprises the following step: S1: mixing the caprolactam, an organic solvent and a catalyst at a certain mass ratio, so asto obtain a mixed solution, adding the mixed solution into a reaction kettle and stirring and heating the mixed solution; S2: when the mixed solution in step S1 reaches certain temperature, introducing ammonia gas into the mixed solution for a reaction; S3, after the reaction in step S2 is ended, rectifying and purifying a reaction product, so as to obtain pure 6-amino-capronitrile. In the methodfor preparing the 6-amino-capronitrile, the caprolactam is taken as the raw material, the reaction conversion rate is comparatively high, and the preparation process is simple.

The invention discloses a preparation method of a hydrocracking catalyst. The method comprises the steps of preparing an acidic mixed solution A containing hydrogenation reactive metals and silicon, preparing a sodium metaaluminate alkaline solution B, and then adding the acidic mixed solution A, the alkaline solution B and CO2 to a reaction tank filled with clear water in parallel to prepare gel; and then adding turbid liquid of a Y type molecular sieve, mixing the substances uniformly, filtering, drying and forming the mixture, and then washing, drying and roasting the product, thus preparing the hydrocracking catalyst. The method has the beneficial effects that a clean preparation method is adopted, so not only can the catalyst be easily formed and the strength of the catalyst be improved, but also the pore volume and specific surface area of the catalyst can be increased and the dispersity of metals in the catalyst can be improved, thus the catalyst has higher hydrocracking activity, middle oil selectivity and stability; and the catalyst prepared by the method can be used for a single-section hydrocracking process of a non-refining section or a one-section serial hydrocracking process of a refining section.

The disclosed dispensing system, and method may be used in combination with a faucet in communication with a water supply via a water line, and includes a liquid dispensing device adapted to create a liquid such as liquid soap, and water mixture in the water line. The dispensing device may include an injector, and a soap container for the liquid soap or other. The system may provide for storage of liquid soap or other, and may also have the injector in line with the faucet water line. The injector may create strong vortices that effectively commingle the liquid soap or other liquid with water into a thoroughly mixed solution that is discharged at the faucet outlet.

The invention provides a preparation method of ultraviolet-proof antistatic graphene coating textile fabric. The method is characterized by comprising the following steps: adding a graphene solution to a water-soluble polyurethane solution after shaking and dispersing so as to obtain a mixed solution; fully stirring the mixed solution; putting a graphene screening agent solution into a padder immersion tank; processing textile base fabric under room temperature through implementing a two-dipping and two-rolling procedure; padding the graphene screening agent on a textile, putting kinds of textiles on which the graphene screening agent is padded into a high-temperature oven for drying, wherein the temperature of the high-temperature oven is 75-95 DEG C; the high-temperature fixation time lasts for 5-30 minutes, so as to prepare the ultraviolet-proof antistatic graphene coating textile fabric. The method is simple in process, and easy to operate, and the yield is high; the produced textile fabric has the excellent function of preventing ultraviolet rays and static electricity.

The invention relates to a method for preparing formic acid through electrochemical catalytic reduction of carbon dioxide, and belongs to the technical field of carbon dioxide recycling. In the method, a proton exchange membrane separates an electrolytic tank into a cathode chamber and an anode chamber, organic solvent / ionic liquid / water mixed solution in which a large amount of carbon dioxide is dissolved is injected into the cathode chamber, and aqueous solution containing supporting electrolyte is injected into the anode chamber; and after an electrolysis power supply is connected, the carbon dioxide undergoes electroreduction reaction on the cathode to form the formic acid. By the method, the organic solvent / ionic liquid / water mixed solution with the advantages of good conductivity, low viscosity, high capacity of dissolving the carbon dioxide, wide electrochemical window, and low use cost can be obtained, and when the carbon dioxide is electrically reduced in the mixed solution, the current density in the electroreduction reaction of the carbon dioxide can be improved and the electrocatalytic activity and long-time stability of a cathode material are improved.

The invention discloses a method for removing hydrogen sulfide in a gas phase through oxidization under a high gravity field, which comprises the steps of: enabling a desulfurizing agent to be in a countercurrent or cross current contact with a hydrogen sulfide containing gas in a desulfurizing high gravity machine; and then adding the desulfurizing agent rich in sulphur in a sulphur sedimentation agent and then enabling the desulfurizing agent added with the sulphur sedimentation agent to be in a countercurrent or cross current contact with air in a regeneration high gravity machine, whereinthe desulfurizing agent is a mixed solution consisting of complex iron, aqueous alkali, a sulphur modifying agent and a defoaming agent, and in the mixed solution, the concentration of iron ions is 0.1-10g / L, pH is 8.0-9.2, the concentration of the sulphur modifying agent is 10-200ppm, and the concentration of the defoaming agent is 5-50ppm. The high gravity machine is used for replacing the traditional low-transfer-efficiency reactor, and a high gravity rotary packed bed reactor is adopted during hydrogen sulfide oxidization and catalyst regeneration, thus process transfer efficiency is greatly strengthened, and time of oxidization desulfurization and regeneration of a desulfurizing agent is shortened; in addition, the sedimentation agent is adopted in a sulphur sedimentation stage and acts together with the sulphr modifying agent, thus the sulphur sedimentation time is also greatly shortened.

The invention discloses a high-efficiency graphene / silver phosphate composite visible light photocatalyst and a preparation method thereof, belonging to the technical field of composite materials and environmental management photocatalysis. The preparation method comprises the following steps: dissolving graphene oxide in water, and carrying out ultrasonic treatment to obtain a graphene oxide dispersed liquid; dissolving silver nitrate in deionized water, gradually and dropwisely adding into the graphene oxide dispersed liquid while stirring to obtain a mixed solution, uniformly stirring, and aging; dropwisely adding a prepared disodium hydrogen phosphate or sodium dihydrogen phosphate solution into the graphene oxide-silver nitrate mixed solution, continuing stirring, transferring into a hydrothermal reaction kettle, carrying out hydrothermal reaction, and cooling to room temperature; and washing the reaction product, and carrying out vacuum drying to obtain the visible light photocatalyst. The invention has the advantages of wide material sources and simple preparation process; and the obtained composite material has the advantages of controllable structure and regular pattern, and has high-efficiency degradation effect on organic dyes rhodamine B and methylene blue with certain concentration under the visible light irradiation.

The invention relates to a traditional Chinese medicine electronic cigarette for quitting smoking, which can effectively solve the problems that an existing smoking-quitting product still contains nicotine and is difficult to play a fast smoking-quitting role. The health care type traditional Chinese medicine electronic cigarette for quitting smoking comprises a battery pole, an atomizer and a smoking-quitting medicament mouth, wherein the front end of the atomizer is placed in the smoking-quitting medicament mouth, the back end of the atomizer is connected with the battery pole, the smoking-quitting medicament mouth comprises a hollow columnar body, a vent hole arranged at the center of the front end and a medicament cabin in the hollow columnar body, and air-permeable cotton and a medicament are filled in the medicament cabin; the atomizer is characterized in that an electrode is arranged at the center of a connecting body, an insulating silicon tube is sheathed on the electrode, a heating element which is wounded on a wick is arranged at the upper end part of the tube, two ends of the wick are installed on the connecting body, and mixed solution of electronic cigarette oil and smoking-quitting medicament liquid is absorbed on the wick; and the battery pole is characterized in that a battery is arranged in an internal cavity, a CPU (central processing unit) control board is arranged at the back end of the cavity, the front end of the battery pole is arranged on the connecting body, the cavity of the battery pole between the connecting body and the battery constitutes an air chamber, and an air inlet hole is arranged on the battery pole. The health care type traditional Chinese medicine electronic cigarette for quitting smoking has significant smoking-quitting effect and has no adverse effects.

The invention relates to a method of synthesizing nickel cobalt oxide electrode material using a hydrothermal method and an application thereof. The method comprises dissolving CoCl2.6H2O, NiCl2.6H2O and CO(NH2)2 into an appropriate amount of deionized water, wherein the mole ratio of CoCl2.6H2O to NiCl2.6H2O is 1 : 2; uniformly stirring the mixed solution by using a magnetic stirrer, transferring the solution into an autoclave, heating the solution to 100 DEG C and keeping the temperature constant for 10 hours; cooling the solution to room temperature, filtering, washing and drying reactants, and then annealing the reactants for 2 hours in an air atmosphere of 250 DEG C. The method is simple to operate and environmental-friendly. The prepared nickel cobalt oxide nanowire is a spinel-type cubic phase and porous, has high purity and relatively high specific surface area, and can be used as electrode materials for super capacitors, with specific capacitance thereof being 722 F / g.

The embodiment of the invention discloses a preparation method of an ozone oxidation catalyst loaded with polymetallic oxide. The method comprises the following steps that an ozone oxidation catalyst carrier is pretreated, wherein the pretreatment method comprises the steps that the ozone oxidation catalyst carrier is soaked through an acid solution after being washed through water, and then the soaked carrier is washed to be neutral and dried; immersion treatment is conducted on the pretreated ozone oxidation catalyst carrier at least once, and then calcination is conducted; the immersion treatment comprises the steps that the pretreated ozone oxidation catalyst carrier is immersed in an immersion solution to be immersed for 6-48 h at the temperature ranging from 20 DEG C to 100 DEG C, and then drying treatment is conducted, wherein the immersion solution is a mixed solution of nitrate, sulfate and acetate or chloride of three metal elements of manganese, nickel, iron, cerium, cobalt and copper, and the concentration of each metal element in the immersion solution ranges from 0.01 mol / L to 1.00 mol / L. By means of the preparation method of the ozone oxidation catalyst loaded with the polymetallic oxide, the removal rate of chemical oxygen demand (COD) in sewage can be significantly increased.

The invention discloses a method for preparing an aluminum oxide coated modified lithium nickel cobalt manganese oxygen cathode material. The method comprises the following steps of: (1) preparation of a precursor: mixing water-soluble metallic nickel salt, cobalt salt and manganese salt into a mixed solution, dripping the mixed solution, a precipitator and a morphological control agent into a reaction container, controlling the pH value and reaction temperature of a system, and performing filtering, washing and vacuum drying after reaction to obtain a (NixCoyMn1-x-y)(OH)2 precursor, wherein x, y and x+y are more than 0 and less than 1; (2) preparation of an aluminum oxide coated precursor: dispersing the (NixCoyMn1-x-y)(OH)2 precursor, water-soluble aluminum salt and a disperser into deionized water, stirring while heating until the disperser is hydrolyzed, filtering to obtain an Al(OH)3-coated (NixCoyMn1-x-y)(OH)2 precursor, roasting the precursor in a sintering furnace to obtain Al2O3-coated (NixCoyMn1-x-y)(OH)2 precursor powder; and (3) uniformly mixing the Al2O3-coated (NixCoyMn1-x-y)(OH)2 precursor powder with lithium salt powder, and calcinating at high temperature to obtain an aluminum oxide coated modified Li(NixCoyMn1-x-y)O2 cathode material with a lamellar crystal structure.

The invention relates to a graphene-based porous macroscopic carbon material and a preparation method thereof, belonging to the technical field of porous macroscopic carbon materials. The material comprises graphene and carbon from polyvinyl alcohol and has large specific surface area. The preparation method comprises the following processes of: mixing a graphene oxide water solution and a polyvinyl alcohol solution, and placing the uniformly mixed solution into a hydro-thermal reaction kettle to obtain a graphene-based hydrogel; freezing and drying the hydrogel to obtain a graphene-based aerosol; and carrying out thermal treatment on the aerosol under the protection of an argon gas atmosphere to obtain the graphene-based porous macroscopic carbon material. The invention has the following advantages of simple preparation process and wide raw material source scope; and the prepared porous macroscopic carbon material has the following advantages of well-developed pore structure, extra-large specific surface area, favorable structural stability and wide application range.

The invention provides preparation and application of a nitrogen doped graphene fuel cell catalyst, wherein a preparation method of the nitrogen doped graphene fuel cell catalyst is characterized by comprising the following steps: dispersing graphene oxide into a solvent, and carrying out ultrasonic treatment, thereby obtaining a graphene solution; dispersing at least one of non-noble metal salt as well as hydrate thereof and nitrogenous small organic molecules into the solvent, thereby obtaining a mixed solution; dropping the graphene oxide solution into the mixed solution, drying the solvent by distillation, thereby obtaining a nitrogen doped graphene precursor, warming to 600-1000 DEG C under the protection by inert gases, keeping the temperature for 1-4 hours, and cooling naturally, thereby obtaining the doped graphene catalyst. The nitrogen doped graphene preparation process provided by the invention is simple; required raw materials are low in cost, high in yield, can achieve industrial production easily, have very high oxygen reduction catalytic activity, can be applied to the fields of fuel cells, metal-air cells as well as microorganism fuel cells and the like.

The invention discloses an efficiency oil and water separation composition fiber film and a preparation method thereof, and belongs to the field of functional nanometer fiber materials. Hydrophobic polymers such as polyurethane, polystyrene and polymethyl methacrylate or polycaprolactone are used as the main raw materials of the fiber film, the main raw materials are dissolved in an organic solvent to form a polymer solution, hydrophobic nanometer particles are added into the polymer solution in the preparation process, after the mixture is evenly mixed, electro-spinning is conducted on the mixed solution by means of the electrostatic spinning method, and then a fiber film material which is formed by micro-nanometer composite structures and is in the shape of non-woven fabric is obtained. The electro-spun fiber film of the micro-nanometer structure has super-hydrophobic / super-oleophylic property in the air and excellent oil adsorption performance, and the contact angle to oil is nearly zero. The efficient oil and water separation composite fiber film is simple in preparation method, low in energy consumption, high in efficiency, high in oil and water separation speed, and capable of being widely used in the fields such as oily water efficient purification.