150results about How to "Won't reunite" patented technology

The invention provides a magnetic mesoporous silica gel material extracting agent used for enriching and/or separating trace organic pollutants in an environment water sample, and a preparation method thereof. A core of the extracting agent provided by the invention is a silicon gel microsphere (i.e. magnetic silicon gel microsphere) wrapped with a plurality of Fe3O4 magnetic nano particles, and a shell of the extracting agent is a mesoporous silicon gel shell layer with inner and outer surfaces modified by C18 silanization. The extracting agent integrates huge special surface area, excellent extracting capacity and ultrahigh extracting volume of a mesoporous material, magnetic separating capacity of a magnetic material, strong extracting capacity of C18 groups and special volume exclusion function of a vertical channel of the mesoporous material. In addition, the extracting agent provided by the invention has the advantages of high extracting efficiency, low preparation cost and simple preparation method, and is very suitable for preprocessing samples of the trace organic pollutants in a bulk-mass water sample.

The invention discloses a method for preparing a graphene oxide-chitosan composite material. The method includes the steps that a chitosan solution is prepared; secondly, a graphene oxide solution is prepared, a 1-ethyl-(3-dimethylaminopropyl)carbodiimide (EDC) solution is added into the graphene oxide solution during stirring, stirring reaction is conducted after dropwise addition, then an N-hydroxyl succinimide (NHS) solution is dropwise added into the graphene oxide solution, stirring reaction is conducted, and an activated hydroxyl graphene oxide solution is obtained; thirdly, the activated hydroxyl graphene oxide solution is dropwise added into the chitosan solution and stirred, the mixture is poured into a mould after being cooled to room temperature, and the cross-linked graphene oxide-chitosan composite material is obtained after freezing drying. The novel graphene oxide-chitosan composite material having an interface bonding function is provided, compared with non-cross-linked composite materials, mechanical properties of the composite material are greatly improved, and use of the composite material in the aspect of the bone induction technology is achieved.

The invention discloses a preparation method of an electrocatalyst of direct methanol fueled battery. A carbon nano tube carrier is purified and activated, and then a solution of platinum or platinum-ruthenium mixture nano particles is prepared; the carbon nano tube and platinum or platinum-ruthenium mixture are mixed in a mass ratio of 1: 0.02 to 1: 0.80: firstly, the carbon nano tube is dispersed with glycol, and added with the platinum or platinum- ruthenium mixture nano particle solution, then treated by 200 to 500W ultrasonic for 1 to 5 hours, thus the electrocatalyst of the direct methanol fueled battery is prepared. The preparation method of the electrocatalyst of the invention does not need surfactant, stabilizer or functional molecule, metal particles do not congregate at normal temperature and are loaded on high density small grain diameter of the carbon nano tubes.

The invention discloses a synthesis method of a load type carbon modified titanium dioxide photocatalyst. The synthesis method comprises the following steps of mixing absolute ethanol and titanium tetrabutoxide to obtain a solution A; mixing HNO3 and absolute ethanol to obtain a solution B; adding the solution A into the solution B dropwise and adding NaOH solution dropwise to obtain titanium column brace liquid; adding cationic surfactant solution into natural bentonite solution dropwise to prepare organic modified bentonite turbid liquid; adding the titanium column brace liquid into the organic modified bentonite turbid liquid dropwise, ultrasonically oscillating and ageing to obtain powder; and calcining the powder under the vacuum condition to obtain load type carbon modified titanium dioxide. Carbon and TiO2 nanopaticles are implanted between the nano layers by utilizing the cation exchange characteristic of the bentonite to form a three-dimensional nanopore structure, so that the specific surface area of the bentonite is enlarged and the adsorption performance of the bentonite is enhanced. The TiO2 and the carbon particles are combined tightly on the surface, so that the surface photosensitivity of the TiO2 can be improved and the visible light degradability is improved. The TiO2 between the bentonite layers has nanosize, so that the nanoeffect can be exerted.

The invention discloses a preparing method of carbon material or nanometer silicon composite material and material through composite sintering method in the electrochemical technological domain, which is characterized the following: possessing stable structure with even particle diameter less than 1 mm; avoiding agglomeration among large amount of nanometer particles due to stronger action of surface to surface; displaying high reversible capacity and excellent circulating property.

The invention provides a preparation method of a graphene/modified titanium dioxide sol composite material. The preparation method is characterized by comprising the steps of: providing titanium dioxide nano sol and graphene; carrying out a reduction reaction under the action of mercapto carboxylic acid and sodium borohydride with auric chloride acid as a raw material, thiol as a surfactant and tetraoctyl ammonium bromide as a phase transfer agent to obtain modified gold nano sol; respectively dispersing the modified gold nano sol and the titanium dioxide nano sol in organic solvents, and mixing to obtain gold nano sol modified titanium dioxide sol; and mixing the gold nano sol modified titanium dioxide sol with a toluene solution of graphene, uniformly dispersing and filtering to obtain the graphene/modified titanium dioxide sol composite material. The modified titanium dioxide nano sol can be uniformly dispersed on the surface of graphene and does not agglomerate.

The invention provides a magnetic abrasive material and a method for preparing the magnetic abrasive material. The magnetic abrasive material is an acicular or spherical magnetic abrasive material with the structure of a core and a film, the core is a stainless pin or a stainless steel ball, and the film is ceramics. Through the method for preparing the magnetic abrasive material provided by the invention, a magnetic abrasive material which has strong polishing or grinding capacity and can form an ideal magnetic brush is obtained.

The invention belongs to the technical field of metallic soap preparation and particularly relates to a method for preparing magnesium stearate by normal-pressure melting. The method comprises the following steps: reacting stearic acid with magnesium oxide in a special feeding way at normal pressure and temperature higher than the melting point of stearic acid; granulating or slicing the material obtained after reaction, thereby obtaining magnesium stearate with very high transparency. The method is low in device investment, small in environment pollution and high in product transparency.

The invention relates to a graphene preparation method, which comprises: 1, preparing a working electrode, wherein graphite is pressed on a stainless steel current collector so as to be adopted as a working electrode of a three-electrode system, 2, preparing intercalation graphite, wherein the three-electrode system is adopted to prepare intercalation graphite, 3, washing, wherein deionized water is adopted to wash the intercalation graphite, 4, carrying out vacuum drying, 5, carrying out microwave stripping, wherein the dried intercalation graphite is taken and added to an ion liquid according to a certain mass volume ratio, and the obtained mixture is placed into a microwave oven to carry out stripping, 6, washing, wherein filtration is performed by using organic solvent, and washing is performed by using deionized water until the pH value is neutral, and 7, carrying out vacuum drying. According to the present invention, the graphene preparation method has characteristics of simple operation and easy industrialization achievement, the yield of the graphene prepared by using the graphene preparation method is high, and the single layer rate of the graphene is up to more than 60%.

The invention belongs to the technical field of modified inorganic nanometer functional materials and discloses a novel nano-fluid and its preparation method and an application thereof. The preparation method comprises the following specific steps: dissolving inorganic nanoparticles in water, adjusting pH to alkaline by adding alkali, carrying out ultrasound, adding the inorganic nanoparticle solution into a silane coupling agent ethanol solution to react for 4-48h so as to obtain a nanoparticle solution containing epoxy functional groups; adding tertiary amine and hydrochloric acid to react for 1-48h, adding polyoxyethylene ether sulfonate to react for 1-48h, and purifying to obtain the novel nano-fluid. The novel nano-fluid is a fluid-like shape. Processability of nanoparticles is raised. The novel nano-fluid also can be used as a special solvent and a reaction medium. The preparation method is simple and easy to operate. Modified nanoparticles will not be agglomerated. Physicochemical properties of nanoparticle kernel are still retained, and nano-fluids with different properties can be obtained by adjusting the type of inorganic nanoparticles and polymerization degree of polyoxyethylene ether sulfonate.

The invention provides a preparing method of a bismuthene nanosheet. The method comprises the steps that firstly, bismuth powder is dispersed in an organic solvent, and dispersion liquid is obtained;secondly, the dispersion liquid is subject to first-time water bath ultrasonic treatment, probe type ultrasonic treatment is carried out, first ultrasonic liquid is obtained, the first ultrasonic liquid is subject to second-time water bath ultrasonic treatment, and second ultrasonic liquid is obtained; thirdly, the second ultrasonic liquid is subject to ultra-low speed centrifugation under 2000 to4000 rpm, a liquid supernatant is collected, the liquid supernatant is subject to low-speed centrifugation under 5000 to 7000 rpm, sediment is collected, and the obtained sediment is the bismuthene nanosheet. The method is simple in process and easy to operate, reproducibility is good, and the controllable-size bismuthene nanosheet with the good single dispersibility is easily manufactured. The invention further provides the manufactured bismuthene nanosheet.

The invention provides a method for preparing a modified titanium dioxide nano particle nanotube. The method is characterized by comprising the following steps of: providing titanium dioxide nano sol; with chloroauric acid as a raw material, thiol as a surfactant and tetraoctyl ammonium bromide as a phase transfer agent, undergoing a reduction reaction under the action of thiol carboxylic acid and sodium borohydride so as to obtain modified golden nano sol; dispersing the modified golden nano sol and the titanium dioxide nano sol in an organic solvent respectively and then mixing to obtain titanium dioxide sol modified by the golden nano sol; and dropwise adding the titanium dioxide sol modified by the golden nano sol on the surface of an anodic aluminum oxide film, performing vacuum filtration, drying, calcining the composite anodic aluminum oxide film, removing the anodic aluminum oxide film, washing, and performing centrifugal separation to obtain the modified titanium dioxide nano particle nanotube. The modified titanium dioxide nano particle nanotube has a novel and stable structure, high specific surface area and excellent nano particle activity and is easily recovered and repeatedly used.

The invention discloses a process for preparing gold nano particles through reduction of chloroauric acid by catalase. The process comprises the steps of dropping a catalase solution into a chloroauric acid solution, and mixing uniformly; and adjusting the pH value of a mixed solution to be alkaline, reacting on the water bath condition of 20-37 DEG C, and obtaining gold nano particles through separation after the reaction is completed. According to the process, the catalase is introduced to serve as a reducing agent and a protective agent, reducing functional groups on the catalase are high in reducibility on the alkaline condition, the synthesis of gold nano particles is facilitated, and the produced gold nano particles are free from agglomeration on the high salinity condition (0.5MNaCl).

The invention relates to a method for preparing a magnetic adsorbent for methylene blue wastewater treatment. The method comprises the steps of 1, mixing FeSO4.7H2O with FeCl3.6H2O, dissolving the mixture in deionized water, conducting heating, adding ammonium hydroxide and sodium humate solution in sequence, conducting mechanical stirring, and reducing temperature to room temperature, so that humic acid modified nanometer Fe3O4 dispersion liquid is obtained; 2, conducting magnetic separation on the humic acid modified nanometer Fe3O4 dispersion liquid to obtain humic acid modified nanometer Fe3O4; 3, washing the humic acid modified nanometer Fe3O4 with absolute ethyl alcohol and deionized water in sequence till neutral, and conducting vacuum drying to obtain Fe3O4/HA. The method is simple and easy to implement, and the obtained product is easy to separate and good in adsorption effect.

The invention provides a preparation method of bamboo joint structure Mn2O3. According to the method, at first, rod-metal organic framework material Mn-MOF precursors are prepared by a guide agent assisting solvent volatilization method; then, in the air environment, the Mn-MOF precursors are calcined; the calcining temperature is controlled to be 400 to 650 DEG C; the time is 2 to 4h; finally, the materials are cooled to the room temperature along with the furnace temperature; the bamboo joint structure Mn2O3 nanometer structure materials can be obtained. The method provided by the invention has the advantages that the operation is simple; the process cost is low; the appearance is regular; the product stability is high, and the like. The industrial production is facilitated. The bamboo joint structure Mn2O3 nanometer structure material obtained by the method has the advantages of good conductivity and great specific surface area; the electrode resistance can be favorably reduced; the materials can be used for supercapacitor electrode materials.

The invention discloses a bivalent nickel ion activated near-infrared long afterglow nano material which takes ZnGa2O4 as a base material and is doped with 0.1 mol%-5 mol% of Ni. The invention further discloses a preparation method of the near-infrared long afterglow nano material. The method comprises the steps that 1, zinc acetate, gallium nitrate and nickel nitrate serve as the raw materials, the raw materials are added into a mixed solution of water and ethyl alcohol and stirred at room temperature, acetylacetone is added, the mixture is stirred at room temperature, and a mixed solution is obtained; 2, the mixed solution is dried, and wet gel is obtained; 3, a mixed solution of n-butyl alcohol and ethyl alcohol is added into the wet gel, reacting and drying are conducted in sequence, and dried gel is obtained; 4, the dried gel is ground and then transferred into a crucible, burning is conducted in a smelting furnace at 900 DEG C to 1,200 DEG C for 2 h, and a power material is obtained. The afterglow bandwidth of the near-infrared long afterglow nano material ranges from 1,050 nanometers to 1,600 nanometers, the afterglow peak is located at 1,250 nanometers to 1,350 nanometers, and the bivalent nickel ion activated near-infrared long afterglow nano material can be well applied to the field of bioimaging.