217results about How to "Achieve doping" patented technology

The invention discloses a method for preparing porous carbon@graphene composite material by taking a bimetal organic framework material as a precursor and application to modification of lithium-sulfur battery diaphragms thereof. The preparation method comprises the following steps: taking zinc salt and cobalt salt in a certain ratio as the raw materials, synthesizing a zinc / cobalt-bimetal organic framework@graphene composite material through a room-temperature liquid phase method, taking the zinc / cobalt-bimetal organic framework@graphene composite material as the precursor, carrying out high-temperature reaction under inert atmosphere, pickling and drying to obtain a cobalt / nitrogen double-doped porous carbon@graphene (Co-N-C@RGO) composite material. Co-N-C@RGO has high conductivity; the specific surface area of Co-N-C@RGO reaches up to 750-1000m<2> / g; the content of Co is 2-4At%; the content of N is 10-20At%. When the material is applied to the modification of the lithium-sulfur battery diaphragms, the material has the function of obviously inhibiting polysulfide shuttle effect and is capable of greatly improving actual specific capacity and cyclic performance of the lithium-sulfur batteries; meanwhile, the raw materials needed for synthesizing the material are simple; the operation is convenient; the large-scale production can be achieved; the material has certain promoting effect on commercialization of lithium-sulfur battery systems.

The present invention relates to a nitrogen-doped porous carbon material for a lithium-air battery positive electrode, wherein the nitrogen-doped porous carbon material has an interconnected graded pore structure, N is uniformly doped in the C skeleton, N accounts for 0.2-15% of the carbon material atomic ratio, the graded pores comprise mass transfer pores and deposition holes, the deposition holes account for 40-95% of the total pore volume, and the mass transfer pores account for 4-55% of the total pore volume. According to the present invention, with application of the carbon material as the lithium-air battery electrode material, the space utilization rate of the carbon material during the charge-discharge process can be increased at a maximum, and the energy density and the power density of the lithium-air battery can be effectively increased; and the preparation process is simple, the material source is wide, the pore structure of the graded pore carbon material can be regulated, the regulation manner is diverse, and the nitrogen doping manner is easily achieved.

The invention provides a preparation method of a high mesoporous rate nitrogen doped carbon electrode material. The preparation method comprises the following steps: step one, pretreatment; step two,hydrothermal reaction: carrying out the hydrothermal reaction on bamboo shoot shells to obtain a hydrochar precursor; step three, carbonation reaction: filtering, washing and drying the hydrochar precursor and then carrying out low temperature carbonization treatment on the dried hydrochar precursor and a nitrogen source material to obtain carbide; step four, activating treatment: carrying out theactivating treatment on the carbide and an activator, carrying out acid pickling, washing with deionized water and drying to obtain the high mesoporous rate nitrogen doped carbon electrode material of which an aperture main peak is 2.8nm. A symmetric supercapacitor assembled by applying an electrode material provided by the invention has the effects that specific capacitance reaches as high as 209F / g when current density is 0.5A / g; especially when the high current density is 10A / g, the symmetric supercapacitor has excellent stability, and the capacitance still reaches as high as 95 percent ofinitial capacitance after 10,000 cycles of charge and discharge.

The invention discloses a preparation method of a carbon nano-enzyme co-doped with active metal and nitrogen element and application thereof as a nano biological probe for detecting hydrogen peroxide.The method comprises the steps that: EDTA disodium and active metal are used as precursors, and are chelated to obtain an intermediate, the intermediate is subjected wot thermal polymerization underan inert atmosphere, and the reactant is ground, dispersed in water, ultrasonicated, filtered, dried to finally obtain the carbon nano-enzyme co-doped with the active metal and the nitrogen element. The method is simple and convenient to operate, and the large-scale preparation of carbon fluorescent quantum dots can be co-doped with the active metal and the nitrogen element without harsh reactionconditions, obtained carbon dots have good dispersibility and wider fluorescence emission range in aqueous solution. The nano-enzyme can be applied to the detection of hydrogen peroxide as a fluorescent probe, and has potential application value in the fields of medical imaging and detection of other biomolecules.

The invention discloses a preparation art, which belongs to the preparation art of photo-hydrolysis nanometer electrode. Particularly, the invention relates to a preparation method, which utilizes solar energy for water decomposition and production of hydrogen nanometer electrode. The invention uses the synthetic titanium oxide nanometer microspheres and other semiconductor materials, such as zinc oxide , to construct lamellar nanometer electrode. The application of lamellar doping method accelerates an efficient separation of electron and cavity, the titanium oxide nanometer microsphere structure increases contact area of the electrode surface and the electrolyte, the material is provided with high light conversion efficiency and photolysis efficiency, which improve the photo-hydrolysis efficiency. The preparation method has a simple manufacturing process, which decreases the manufacturing difficulty of semiconductor nanometer composite material and simplifies the implementation process of the electrode. Thus, the invention has a potential application value.

The invention belongs to the field of chemical functional materials and discloses a film-coating liquid of a vanadium dioxide thin film and a preparation method and application of the vanadium dioxide thin film. The film-coating liquid of the vanadium dioxide thin film comprises the following solutes in percentage by weight: a compound of tetravalent vanadium with the mol concentration of 0.001-10Mol / L and addictive with mass percentage of 0.01-40, wherein the addictive is selected from one or more of oleinic acid, hydrochloric acid, hydrofluoric acid, aqueous ammonia, hydrogen peroxide, glycol, glycerol, oleyl amine, cetyl trimethylammonium bromide, tetraproylammonium bromide and polyving akohol. The invention also discloses a preparation method of the vanadium dioxide thin film and can obtain a rutile type vanadium dioxide thin film with high visible transmissivity and infrared intelligent regulation and control capability, so that the thin film prepared by the method can meet energy-saving windows with different application requirements. The invention has the advantages of simple preparation process, favorable safety and suitability for large-scale industrial preparation and generalization.

The invention discloses a N-doped porous carbon / NiO composite material and a preparation method therefor. The preparation method comprises the following steps: first, coal-based polyaniline is prepared through a in-situ polymerization method; second, nickle powder and coal-based polyaniline are mixed uniformly to obtain a mixture, the mixture is subjected to pyrolysis and a N-doped porous carbon / Ni composite material is obtained; third, hydrogen peroxide and sulfuric acid are mixed uniformly and a mixed solution A is obtained; fourth, the N-doped porous carbon / Ni composite material is added in the mixed solution A, after mixing processing is carried out, the pH value is adjusted to 7-8 through ammonium hydroxide, next a urea aqueous solution is added drop by drop, insulation stirring is carried out, pumping filtration is carried out after cooling, a filter cake is washed, the filter cake is calcined, and a N-doped porous carbon / NiO composite material is obtained. N-doped porous carbon in the N-doped porous carbon / NiO composite material prepared through the method shows pore structure characteristics of meso pores as the main and macropores as the part and NiO in the composite material exists in a form of nanosheets or nanospheres.

The invention relates to a nitrogen-doped graphene / nano titanium dioxide photocatalyst as well as a preparation method and application thereof. The nitrogen-doped graphene / nano titanium dioxide photocatalyst contains nitrogen-doped graphene, and titanium dioxide supported to the nitrogen-doped graphene, wherein the nitrogen-doped graphene contains a nitrogen source; the nitrogen source comprises graphite nitrogen and pyrrole nitrogen; and a mass ratio of the nitrogen-doped graphene to titanium dioxide is (0.005-0.05):1, preferably (0.01-0.02):1.

The invention relates to a functional thin film material preparing technology, which adopts improved ion beam amplify deposited method to make the film and combines the subsequent crystallization and annealing to achieve the impurity element even immersing and the effective place-replacing to vanadium so that the phase starting temperature of the thin film reduces to 12-16 deg. It adjusts the argon / hydrogen ratio film craft and crystallizing heat treatment condition so that when the polycrystalline VO2 thin film transfers to the mental phase from the semiconductor phase, the change of the resistance ratio over 2 magnitude orders.

The invention provides a method for reparative regeneration of a lithium cobalt oxide anode material in waste batteries. The method includes: separating the anode material from lithium cobalt oxide waste batteries; laying positive pole pieces on a mesh belt, and controlling the mesh belt to vibrate continuously while controlling gas to pass through the meshes of the mesh belt from bottom to top; under conditions of vibration of the mesh belt and gas circulation of the meshes of the mesh belt, respectively heating the positive pole pieces for 10-60min at 100-300 DEG C and 380-520 DEG C, and collecting anode material powder I; sequentially subjecting the anode material powder I to screening removal of broken aluminum foils and electromagnetic removal of iron to obtain anode material powder II, and sampling to detect contents of Li, Co and Al in the anode material powder II; replenishing Li element and Al element to the anode material powder II according to a detection result obtained at the step 4 to obtain anode material powder III, wherein a mole ratio of Li to Co to Al is 1-1.05:1-x:x, and x refers to 0.05-0.2; subjecting the anode material powder III to ball milling in a high-energy ball mill to obtain anode material powder IV; calcining the anode material powder IV in a pure oxygen atmosphere to obtain repaired regenerated lithium cobalt oxide.

The invention belongs to the technical field of medical biomaterials, and discloses a nano-cone structure composite for capturing cancer cells, and a preparation method and application thereof. The method includes: electrodepositing chlorine-doped polypyrrole on the surface of a conductive substrate by the aid of chronoamperometry; selecting a three-electrode pattern to deposit polypyrrole / biotin material with nano-cone structure on a working electrode by the aid of chronopotentiometry by using a conductive metal as a counter electrode, the polypyrrole-deposited conductive substrate as the working electrode and a buffer solution containing pyrrole and biotin as an electrolyte; activating the working electrode deposited the polypyrrole / biotin material with nano-cone structure, culturing in streptavidin solution, performing grafting reaction with antibodies, and culturing in BSA (bull serum albumin) solution to obtain the nano-cone structure composite. The method is simple and low in cost, the nano-cone structure in the composite is stable, and cancer cells can be effectively captured and nondestructively released.

The invention discloses an aluminum-doped zinc oxide-based thermoelectric material and a preparation method thereof, and belongs to the field of environment-friendly new energy materials. The chemical composition of the zinc oxide-based thermoelectric material is Zn1-xAlxO (x is more than or equal to 0 and less than or equal to 0.20); and the electrical conductivity of the thermoelectric material is 65 to 1,100 S / cm, and the thermal conductivity of the thermoelectric material is 8 to 35 W / m / k. The method for preparing the aluminum-doped zinc oxide-based thermoelectric material comprises the following steps of: proportioning Zn(OH)2 powder and Al(OH)3 powder according to the stoichiometry of Zn1-xAlxO (x is more than or equal to 0 and less than or equal to 0.20); ball-milling and mixing the proportioned raw material powder; roasting the mixed powder at the temperature of between 100 and 550 DEG C in a corundum crucible; and filling the roasted powder into a graphite die and sintering the powder at the temperature of between 500 and 1,200 DEG C to obtain the aluminum-doped zinc oxide-based thermoelectric material. By the method, doping is easier to realize and the high-compactness material can be obtained; and the obtained material has good mechanical property and thermoelectric property.

The invention discloses a preparation method of an ultra-long stibium-doped zinc oxide micrometer line, belonging to the technical filed of nano / micrometer material preparation. The basic process is as follows: utilizing cleaning agent to wash out a silicon substrate, then sputtering a layer of Au film of 20nm by magnetic control to be used as a precipitation substrate; completely mixing Zn powder, Sb2O3 powder and C powder in a certain mole ratio evenly, and placing the mixed powder which is used as a reaction source in a ceramic boat, wherein the powder mixing process can utilize a ball milling method; putting a bearing reaction source and the ceramic boat of the substrate into the middle part of a quartz tube in a tube furnace, regulating a flow meter to introduce the mixed gas of argon and oxgen into a quartz tube under the condition that the total flow is 300cm3 / min and argon in the mixed gas accounts for 98% and oxygen accounts for 2%, heating the tube furnace to 930-950 DEG C under the atmosphere, then keeping the temperature for about 10min, after the preparation reaction finishes, taking out the silicon substrate and cooling to room temperature to obtain the product of the ultra-long stibium-doped zinc oxide micrometer line. The invention realizes the preparation of the ultra-long stibium-doped zinc oxide micrometer line, has simpler process, can ensure high quality products and has good controllability.

The invention discloses a nitrogen-oxygen-sulfur triple-doped porous carbon material and a preparation method thereof, and belongs to the field of new energy materials. A fungus tremella is selected as a precursor, a nitrate is selected as an activating agent, the mass ratio of the tremella to the activating agent is controlled to be 1:0.1-1:5, and relevant treatment is carried out to obtain a tremella-activator mixture; the mixture is put into a tubular furnace, and carbonization activation is carried out under an inert atmosphere; full washing is further carried out in diluted hydrochloric acid and distilled water for removing impurities; and drying is carried out in a drying oven to obtain the nitrogen-oxygen-sulfur triple-doped porous carbon material. The preparation method provided bythe invention is simple and feasible, cost is low, and the obtained nitrogen-oxygen-sulfur triple-doped carbon material has a hierarchical and open pore structure, has a large specific surface area,can be applied to electrode materials of supercapacitors, and has high specific capacitance, good rate performance and high energy density during a test at 0-60 DEG C.