65 results about "Nitrogen doped graphene" patented technology

The present application relates to thermal insulation coating technical field, specifically to a kind of low VOCs ultraviolet resistant thermal insulation coating composition and its performance testing device, consisting of the following mass parts components: water-based acrylic resin 30-45 parts, nitrogen-doped graphene 1-3 parts, nano composite powder 2-5 parts, low water absorption and expansion glass microsphere 8-12 parts, silane coupling agent modified sepiolite 5-10 parts, silane coupling agent KH560 0.5-1.5 parts, ultraviolet absorber UV-9 0.3-0.8 parts, hydroxyethyl cellulose thickening agent 0.2-0.5 parts;Composition meets the following conditions: (1) VOCs content≤50g / L;(2) ultraviolet absorption rate≥95%;The present application realizes the purpose that VOCs content is far lower than traditional solvent type coating through the synergistic effect of water-based acrylic resin system and low water absorption and expansion glass microsphere, while nitrogen-doped graphene and nano ITO-SiO2 Composite powder form ultraviolet-infrared dual-effect shielding layer, ultraviolet absorption rate, infrared reflectivity greatly improve, solve the problem that traditional anti-UV coating function is single, VOCs is overproof.

The invention discloses an iron-carbon composite material for heavy metal contaminated soil remediation and a preparation method of the iron-carbon composite material, and belongs to the field of heavy metal contaminated soil remediation. The iron-carbon composite material comprises rape straw, hydroxyapatite, zero-valent iron, sulfydryl functionalized magnetic cerium oxide and nitrogen-doped graphene quantum dot-sodium alginate. The sulfydryl-functionalized magnetic cerium oxide is prepared from cerium nitrate and ferric nitrate through precipitation, calcination and sulfhydrylation, and the nitrogen-doped graphene quantum dot-sodium alginate is prepared from citric acid and urea through microwave reaction, dialysis, mixing and freeze drying; the preparation method comprises the following steps: treating straws and hydroxyapatite to obtain ball-milled phosphorus-containing biochar, mixing the ball-milled phosphorus-containing biochar with zero-valent iron and two modifiers, and carrying out molding and high-temperature calcination to obtain the phosphorus-containing biochar-based composite material. The material has a remarkable remediation effect on the heavy metal contaminated soil, can effectively reduce the activity of heavy metals in the soil, has the characteristics of environmental friendliness and high stability, and is suitable for treating the soil compositely contaminated by the heavy metals such as cadmium and lead.

The invention relates to the technical field of palladium recovery, in particular to a method for recovering palladium. According to the technical scheme, the method comprises a precipitant pre-synthesis stage, a targeted palladium precipitation stage and a multi-stage reduction purification stage, and the precipitant pre-synthesis stage comprises the step of adding 10-15 parts by mass of butanedione, 18-30 parts by mass of hydroxylamine hydrochloride and 0.1-0.3 part by mass of iron phthalocyanine into a reaction kettle. Through a composite precipitator system and a multi-stage reduction process, the method has safety and high efficiency: flammable and explosive solvents such as ethanol and highly toxic reducing agents such as hydrazine hydrate are not needed, so that the potential safety hazard of production and the environment-friendly treatment cost are remarkably reduced; high-selectivity capture and efficient reduction of palladium are achieved through magnetic separation of magnetic nano-microspheres, induced precipitation of nitrogen-doped graphene quantum dots and a staged temperature-control and pressure-control reduction technology, the palladium recovery rate and purity are high, the process period is short, operation is controllable, and the method is suitable for industrial continuous production.

The invention relates to the technical field of electrochemical luminescence sensing, and discloses an electrochemical luminescence immunosensor for detecting interleukin-1 beta, a preparation method and application thereof, the electrochemical luminescence immunosensor comprises a working electrode, a reference electrode and a counter electrode; the working electrode comprises a substrate electrode and an ordered mesoporous silica film (SNF) modified on the surface of the substrate electrode; a composite nano-enzyme containing cobaltosic oxide nanoparticles and nitrogen-doped graphene quantum dots is loaded in a nano-pore channel of the SNF, the outer surface of the SNF is modified with an epoxy group, and an anti-interleukin-1beta antibody is covalently immobilized through the epoxy group; a detection system of the electrochemical luminescence immunosensor is a luminol / dissolved oxygen system. According to the electrochemical luminescence immunosensor, a luminol / dissolved oxygen system signal can be remarkably enhanced, and high-sensitivity and accurate quantitative detection of interleukin-1 beta is realized under a neutral condition.

The application relates to application of iron-nitrogen doped graphene in preparation of anti-radioactive enteritis drugs and belongs to the technical field of biological medicines. ZIF-8 powder, 1,10-phenanthroline powder, iron (II) acetate powder and a grinding medium are placed in a closed container to perform mechanical ball milling treatment to obtain a mixed powder; under the protection of inert gas, the mixed powder is placed in a preheated tube furnace to perform pyrolysis treatment, and is cooled to room temperature to obtain iron-nitrogen doped graphene. The iron-nitrogen doped graphene has NADH oxidase-like activity, can directly catalyze the conversion of NADH into NAD + , can rapidly supplement NAD + depletion caused by radiation, can enhance PARP-dependent DNA damage repair, can reduce the generation of active oxygen (ROS), can reduce intestinal cell death and can protect the integrity of intestinal structure, and can realize efficient protection of radioactive enteritis. Moreover, the problem of low-efficiency biosynthesis of NAD + supplementation in existing radioactive intestinal injury protection technologies is solved.

A method for rapidly detecting and identifying food-borne pathogens by using a two-dimensional / zero-dimensional MXene / GQDs Schottky heterojunction fluorescence sensor array based on machine learning comprises the following steps: synthesizing three nitrogen-doped graphene quantum dots through a hydrothermal method, determining the optimal excitation wavelength, concentration, reaction temperature and pH value of the nitrogen-doped graphene quantum dots, and further determining the fluorescence intensity of the nitrogen-doped graphene quantum dots under the optimal condition; constructing a fluorescence sensor array, mixing the three graphene quantum dots with target heavy metal ions, incubating, then measuring fluorescence intensity to obtain fluorescence response data, and normalizing the data to obtain the fluorescence response data. And analyzing by using machine learning methods of a decision tree, a support vector machine, K nearest neighbor, linear discriminant analysis, naive Bayes and a neural network. The prepared fluorescence sensor array can rapidly identify heavy metal ions, is excellent in accuracy, sensitivity and stability, provides an economical and efficient solution for heavy metal ion detection, and has remarkable application potential in environmental monitoring.

The invention discloses dual-application nitrogen-doped graphene / dopamine grafted carboxymethyl cellulose aerogel as well as a preparation method and application thereof, and relates to the technical field of graphene aerogel preparation. The preparation method comprises the following steps: dispersing graphene oxide in water to obtain a graphene oxide dispersion liquid; mixing the graphene oxide dispersion liquid with ethidene diamine and dopamine grafted carboxymethyl cellulose, and performing heating reaction to obtain composite graphene hydrogel; the composite graphene hydrogel is sequentially subjected to washing, liquid nitrogen quick freezing, freeze drying and calcination, and the dual-application nitrogen-doped graphene / dopamine grafted carboxymethyl cellulose aerogel is obtained. The nitrogen-doped graphene / dopamine grafted carboxymethyl cellulose aerogel has the advantages of ultralight weight, hyperelasticity, rapid shape recovery, strong adsorption capacity, good electrochemical performance and the like, and can be used as an adsorption material for adsorption of oil, heavy metal Cr and the like and as an electrode material for preparation of a supercapacitor.

The invention discloses an extraction head for detecting malathion residues in agricultural products and a detection method applying the extraction head, the extraction head is a composite material of poly (5-amino indole pyrrole)-ionic liquid-porous nitrogen-doped graphene, and the ionic liquid is 1-butyl-3-methylimidazolium hexafluorophosphate. The extraction head has the beneficial effects that the extraction head made of the composite material has relatively good stability and repeatability, and can be used for rapidly detecting the residue of malafos sulfur in agricultural products.

The invention discloses a high-thermal-conductivity pouring sealant based on modified nitrogen-doped graphene as well as a preparation method and application of the high-thermal-conductivity pouring sealant, and belongs to the technical field of pouring sealants. The pouring sealant comprises a pouring sealant matrix and modified nitrogen-doped graphene, wherein the pouring sealant matrix comprises 50-85 parts of matrix resin, 1-10 parts of a filler, 1-5 parts of a flexibilizer and 10-30 parts of a solvent; the modified nitrogen-doped graphene is prepared by the following steps: uniformly adsorbing manganese carbonate in nitrogen-doped graphene, treating in a high-temperature reducing atmosphere, uniformly distributing lithium fluosilicate in the nitrogen-doped graphene, and finally sintering. The nitrogen-doped graphene is pretreated by adopting manganese carbonate and lithium fluosilicate, so that the dispersity and the compatibility with a resin matrix of the nitrogen-doped graphene are effectively improved, the heat-conducting property, the tensile strength, the hardness and the heat stability of the pouring sealant are improved, the construction performance is good, the nitrogen-doped graphene can stably work in a high-temperature and high-power environment, and the service life of the pouring sealant is prolonged. And the packaging method can be widely applied to packaging of the vehicle-mounted charger transformer of the electric vehicle.

The invention discloses a preparation method of an in-situ nitrogen-doped graphene reinforced copper-based composite material based on external pyrolysis, and relates to the technical field of metal-based composite material preparation. The method specifically comprises the following steps that copper powder is placed in a heating device, and a solid nitrogen-containing carbon source is placed in an external pyrolysis device; after the system is vacuumized and cleaned, inert gas and hydrogen are introduced, and the heating device is heated to a specific temperature and is subjected to heat preservation. An external pyrolysis device is started, the temperature is increased to the pyrolysis temperature, a nitrogen-carbon-containing small molecule precursor is generated and conveyed into a heating device, in-situ growth is conducted on the surface of the copper powder, and high-dispersion composite powder is prepared; and sintering the powder to obtain the densified high-dispersion nitrogen-doped graphene / copper composite block material. According to the method, the in-situ uniform growth of the nitrogen-doped graphene on the surface of the copper powder is realized through a solid nitrogen-containing carbon source external pyrolysis technology in combination with a synergistic mechanism of copper powder regulation and control, precursor directional transportation and in-situ doping growth, and a new way is provided for controllable synthesis of the copper-based composite material.

The application discloses a kind of adsorbents for noble metal recovery and preparation method thereof, further provide a kind to be used in the noble metal recovery method of the catalyst, wherein the adsorbents for noble metal recovery includes nitrogen-doped graphene-SiO2 Hybrid Material, the nitrogen-doped graphene-SiO2 Hybrid Material includes graphene-SiO2 Hybrid Material and nitrogen doped therein, wherein the molar amount of nitrogen in the nitrogen-doped graphene-SiO2 Hybrid Material and the total molar amount of C and Si are 1: (55-10050) ratio. The noble metal recovery adsorbent of the application can effectively recover noble metal Au in wastewater, has strong noble metal recovery adsorption capacity, high recovery rate, especially for the catalyst washing produced in the preparation process of vinyl acetate catalyst containing lower content of noble metal element Au has higher noble metal recovery adsorption capacity.

The invention discloses a monatomic catalyst modified diaphragm for a lithium-sulfur battery as well as a preparation method and application of the monatomic catalyst modified diaphragm. According to the composite material, nitrogen-doped graphene composite defect cerium hydroxide (NA (at) Ce (OH) 4) is taken as a carrier, high-dispersion cobalt single atoms (SACo) are anchored through oxygen deficiency, and the NC (at) Ce (OH) 4 (at) SACo composite material is formed. A commercial diaphragm is coated with the composite membrane to prepare a functional diaphragm, and the functional diaphragm is applied to a lithium-sulfur battery. Cobalt single atoms and defect cerium hydroxide in the diaphragm can achieve a synergistic effect, on one hand, rapid conversion of lithium polysulfide is catalyzed, and the shuttle effect is inhibited; on the other hand, uniform deposition of lithium is guided, and dendritic crystal growth is inhibited. The lithium-sulfur battery adopting the diaphragm shows high specific capacity and excellent cycle life. The preparation process is simple, and a new thought is provided for development of the high-performance lithium-sulfur battery.

The application discloses a kind of methods for constructing electrochemical immunosensor for detecting apolipoprotein A4, comprising: (1) nitrogen-doped graphene and polyethyleneimine are fully stirred in solvent Composite, then add bipyridine functionalized covalent organic framework material and fully stir Composite, obtain NG-PEI-COF composite material;With bipyridine functionalized covalent organic framework material as carrier, gold nanoparticles, apolipoprotein A4 antibody and toluidine blue are loaded in sequence, to obtain tracer probe;(2) on electrode NG-PEI-COF composite material, gold nanoparticles, apolipoprotein A4 and tracer probe are modified in sequence, to obtain the electrochemical immunosensor of the application.The electrochemical immunosensor constructed by the method shows excellent detection performance for apolipoprotein A4, the marker of depression, good reproducibility and stability, and shows good anti-interference performance for a variety of other markers of depression, can be accurately determined in 0.01~300 ng / mL linear range, detection limit is as low as 2.16 pg / mL, and can be applied to serum sample.

The present invention provides a nitrogen-doped graphene acid that is present in a sample and contains 3 at.% to 10 at.% (preferably 4 at.% to 6 at.%) of nitrogen and 25 at.% to 45 at.% (preferably 30 to 38 at.%) of oxygen for all atoms determined by X-ray photoelectron spectroscopy (XPS) using an Al-Kα X-ray source. In some embodiments, the nitrogen-doped graphene acid is in the form of dots. The nitrogen-doped graphene acid is produced by a method comprising the following steps: supplying nitrogen-doped graphene, oxidizing the nitrogen-doped graphene by reaction with an oxidizing inorganic acid, preferably nitric acid, and washing the resulting mixture with water. The nitrogen-doped graphene acid is for the isolation of Pb 2+ and / or Cd 2+ , or for the detection of Pb 2+ and / or Cd 2+ and is particularly useful.

The invention relates to the technical field of packaging materials, in particular to a polylactic acid-based composite packaging material and a preparation method thereof. The polylactic acid-based composite packaging material is prepared from the following raw materials in parts by weight: 100 parts of polylactic acid, 10 to 20 parts of poly (adipic acid) / butylene terephthalate, 6 to 10 parts of glycidyl methacrylate grafted polylactic acid copolymer, 2.1 to 3.6 parts of silane modified montmorillonite powder of which the surface is loaded with carbon nanospheres, 0.6 to 0.9 part of silane modified nitrogen-doped graphene quantum dots, 1 to 1.5 parts of epoxidized soybean oil and 0.2 part of antioxidant. And 0.5 part. By optimizing the raw material formula, optimizing the filler preparation process and the like, the prepared polylactic acid-based composite packaging material has excellent strength, toughness and the like while keeping the degradable characteristic, and also has better barrier property.

The application provides a long-circulation polyanion positive electrode material and a preparation method thereof and a sodium ion battery, wherein the positive electrode material comprises: an inner core, a particle with a chemical formula of Na3V2(PO4)2F3; a middle layer, a multi-level pore carbon layer coated on the surface of the inner core; and an outer layer, a nitrogen-doped graphene three-dimensional conductive network. In the positive electrode material, the multi-level pore carbon layer is coated on the surface of the inner core, which not only improves the conductivity of the material, but also effectively alleviates the volume expansion problem of sodium ions in the charging and discharging process, thereby prolonging the cycle life of the battery; the outer layer adopts the nitrogen-doped graphene three-dimensional conductive network, which further improves the conductivity and structural stability of the material. The three-dimensional conductive network not only provides more electron transmission channels, but also effectively prevents the aggregation between particles, thereby improving the cycle stability and rate performance of the material.

The invention relates to a preparation method of a high-temperature-resistant liquid crystal polyarylester composite nitrogen-doped graphene electromagnetic shielding fiber. The fiber prepared by the method has a skin-core composite structure, a skin layer contains 3.0-10.0 wt% of surface modified nitrogen-doped graphene, a core layer is pure liquid crystal polyarylester, and the mass ratio of the skin layer to the core layer is 3: 7-5: 5. The preparation method comprises the steps of nitrogen-doped graphene surface modification, conductive master batch preparation, sheath-core composite spinning and gradient heat setting. The electromagnetic shielding effectiveness of the obtained fiber at the frequency band of 8-40 GHz is larger than or equal to 35 dB, the tensile strength is larger than or equal to 3.0 GPa, the density is 1.42-1.45 g / cm < 3 >, and the shielding effectiveness retention rate gt after thermal aging at 250 DEG C for 500 hours is achieved; the spinning end breakage rate is 1t; 5%. The fiber and the preparation method are suitable for manufacturing 5G / 6G communication base station radio frequency cables, aerospace electronic equipment cable shielding, high-voltage wiring harnesses of new energy automobiles or shells of precise electronic parts.

The invention relates to the technical field of OLED display devices, and discloses an organic light-emitting structure, a display panel and a preparation method thereof.The organic light-emitting structure comprises a hole injection layer and a light-emitting layer which are arranged in a stacked mode, and the hole injection layer is arranged on the side, close to an anode substrate, of the light-emitting layer; the hole injection layer is a nitrogen-doped double-layer graphene film, and the energy level of the nitrogen-doped double-layer graphene film is 5.0-6.0 eV; metal is selected as a substrate, a carbon source and a nitrogen source are mixed, premixed gas is introduced into a CVD reaction chamber at a preset temperature, a nitrogen-doped double-layer graphene thin film is formed on the surface of an anode substrate, and after the CVD reaction chamber is cooled to the room temperature, the nitrogen-doped double-layer graphene thin film is transferred to the surface of an anode. And a hole transport layer, an electron blocking layer, a light-emitting layer, a hole blocking layer, an electron transport layer, an electron injection layer and a cathode are sequentially evaporated. The injection barrier of the anode and the hole transport layer can be reduced, and the working voltage of the device is reduced; and meanwhile, the light emitting performance and the electrical performance of the device can be improved by introducing the double-layer graphene structure.

The invention discloses a method for preparing graphene by capturing CO2. The method comprises the following steps: firstly, loading a porphyrinyl compound solution on the surface of a metal matrix; and then taking the obtained porphyrinyl compound modified metal electrode as a cathode, combining an anode and a structure-directing agent, and carrying out an electroreduction reaction under the conditions of external bias voltage, heating and CO2 atmosphere to obtain the nitrogen-doped graphene nanosheet. The preparation method comprises the following steps: firstly, loading a structure-directing agent on the surface of a cathode, capturing CO2, performing electric reduction to form a porphyrinyl-carbon product, and simultaneously performing electric stripping and in-situ nitrogen doping to form nitrogen-doped graphene. The obtained nitrogen-doped graphene has a thin two-dimensional lamellar structure, a relatively large specific surface area, abundant and uniformly distributed nitrogen active sites and excellent chemical stability; and the related preparation method has the advantages of convenient product separation and low production cost, and can provide a new idea for the preparation of high-performance graphene products.

The invention relates to modified graphene coated ferric sodium pyrophosphate, a preparation method and a sodium ion battery. The modified graphene coated ferric sodium phosphate pyrophosphate comprises a ferric sodium phosphate pyrophosphate matrix and modified graphene coated on the surface of the ferric sodium phosphate pyrophosphate matrix; the modified graphene comprises nitrogen-doped graphene and a copper plating layer formed on the surface of the nitrogen-doped graphene through in-situ reduction. The nitrogen doping and copper plating combined double-strategy modified graphene is adopted to coat the ferric sodium pyrophosphate, a copper plating layer on the surface of the modified graphene and the nitrogen doped graphene form a double-conductive network, the rate capability is improved, and meanwhile, the flexible support of the graphene, the rigid protection of the copper plating layer and the synergistic effect of the double shell layers are utilized, so that the performance of the lithium ion battery is improved. The structural stability of the ferric sodium phosphate pyrophosphate in the charge-discharge process is maintained, and the cycle performance of the ferric sodium phosphate pyrophosphate is improved.

This invention relates to the field of biosensor technology, and in particular to an electrochemiluminescence sensor, its fabrication method, and its applications. The sensor comprises a three-electrode system, wherein the working electrode includes a substrate electrode, an amino-functionalized vertically ordered mesoporous silica film formed on the surface of the substrate electrode, and nitrogen-doped graphene quantum dots confined within the amino-functionalized vertically ordered mesoporous silica film; the electrolyte used in the sensor is a phosphate buffer containing luminol. This invention achieves highly sensitive and selective detection of superoxide dismutase (SOD) by constructing an electrode modified with nitrogen-doped graphene quantum dots confined within an amino-functionalized vertically ordered mesoporous silica film, utilizing its enhanced luminol-dissolved oxygen electrochemiluminescence signal and the specific quenching effect of SOD on superoxide anions.

The application provides a preparation method of a nitrogen-doped graphene CIGS thin-film battery tail gas purifying agent, and is characterized in that the method comprises the following steps: S1, placing a nitrogen-doped graphene carrier and a composite copper source in a reaction kettle, adding ammonia water, stirring for 20-40 min, and obtaining a reaction product for standby; S2, adding a strong alkali solution into the reaction product in step S1, stirring for 20-30 min, washing, suction filtering, and drying to obtain the nitrogen-doped graphene CIGS thin-film battery tail gas purifying agent. The tail gas purifying agent has the characteristics of removing H2S and H2Se gas at room temperature, can be widely applied to the field of environmental protection material preparation, and has good commercial application value.

The application provides a piezoelectric-photocatalytic synergic composite fiber for roads and a preparation method thereof, and belongs to the technical field of road engineering. 0.6 Mg 0.2 NbO3 and nitrogen-doped graphene to obtain a mixed solution, and obtains a core layer spinning solution after ultrasonic dispersion, adds Pr 0.5 Bi 0.5 FeO3 / Bi2O2Se composite material into an organic solvent to obtain a shell layer spinning solution; S2, the shell layer spinning solution and the core layer spinning solution are respectively placed into corresponding positions of a coaxial electrospinning device to perform coaxial electrospinning, and a composite fiber is collected; S3, the composite fiber is subjected to heat pressing treatment, and then is subjected to surface modification of a silane coupling agent to obtain the piezoelectric-photocatalytic synergic composite fiber. 0.6 Mg 0.2 NbO3, Pr 0.5 Bi 0.5 FeO3 / Bi2O2Se composite material. The application realizes the purposes of improving road mechanics and anti-skid performance and degrading automobile exhaust.

The invention discloses a preparation method and application of a boron-nitrogen co-doped gradient graphene-coated capacitor carbon type composite electrode material. Graphene oxide, a boron-containing reducing agent, a nitrogen source and the like form a boron-nitrogen doped graphene coating layer on capacitor carbon particles by controlling pyrolysis conditions; a micropore-mesopore-macropore multistage pore channel structure beneficial to rapid ion transmission is synchronously constructed, pore channels are prevented from being blocked due to coating, the coating layer can improve the specific capacity of the electrode, improve the conductivity and the electrochemical activity, optimize the interface wettability of the electrode and an electrolyte, and improve the electrochemical performance of the electrode. And the formed electrode material has the effect of doubly inhibiting the side reaction of the electrolyte, and is suitable for being applied to the fields of supercapacitors and the like.

The invention relates to a preparation method of a nickel oxide thin film and a perovskite solar cell, and the preparation method of the nickel oxide thin film comprises the steps: depositing NiO on a graphene layer or a nitrogen-doped graphene layer through magnetron sputtering, and obtaining the nickel oxide thin film, the preparation method of the perovskite solar cell comprises the following steps: firstly, preparing a graphene layer or a nitrogen-doped graphene layer on a substrate, and then depositing NiO through magnetron sputtering to obtain a nickel oxide film; and sequentially preparing a self-assembled monomolecular layer, a perovskite light absorption layer, an electron transport layer, a hole blocking layer and a back electrode on the nickel oxide thin film to obtain the perovskite solar cell. Compared with the prior art, the method has the advantages that the film quality comparable to that of an ALD method can be obtained within the thickness range of 3-15 nanometers, meanwhile, the cost and efficiency advantages of a magnetron sputtering method are achieved, and the method has wide industrial application prospects.

The present invention relates to a solid-state rechargeable zinc-air battery featuring a novel bifunctional electrocatalyst, a dual-crosslinked polyacrylic acid hydrogel electrolyte, and a stannate-based additive for in situ zinc anode modification. The cathode comprises a gas diffusion layer coated with ruthenium-ruthenium oxide core-shell nanoparticles supported on nitrogen-doped graphene, providing enhanced bifunctional catalytic activity and stability. The anode consists of zinc metal modified in situ by a stannate-based additive to form a solid electrolyte interphase layer, effectively suppressing dendrite formation. The electrolyte membrane is a polyacrylic acid hydrogel, covalently and ionically cross-linked, and soaked in an aqueous solution containing potassium hydroxide, zinc acetate, and a stannate-based additive, resulting in improved mechanical strength, ionic conductivity, and battery safety. The integrated system delivers high power density, specific capacity, and robust cycling stability, offering a significant advancement in the field of solid-state zinc-air batteries.

The invention relates to the technical field of batteries, in particular to a gas inhibition film and a preparation method and application thereof. The gas inhibition film comprises a polymer matrix, and an acid removing agent and an oxygen absorbing agent which are loaded on the polymer matrix, the deacidification agent comprises calcium oxide; the oxygen absorbent comprises at least one of CeO2, nitrogen-doped graphene and a metal organic framework material. The preparation method comprises the following steps: mixing a deacidification agent, an oxygen absorbent and a polymer with a solvent to obtain a spinning solution; and preparing a membrane by adopting an electrostatic spinning method, and performing vacuum drying to obtain the gas inhibition membrane. The gas inhibition film can remove SO2 and O2 generated in the battery in the normal operation process of the battery, so that the service life of the battery is prolonged; the battery can also be used for safety prevention and control, can react with H2O in the air under the condition that the battery is damaged, triggers an alarm by releasing heat, can also absorb H2S generated in the initial stage of leakage, and delays the time of releasing H2S to the outside.

The invention discloses a semi-polar surface GaN film prepared based on Van der Waals epitaxy and a semiconductor device. The semi-polar surface GaN film is prepared based on Van der Waals epitaxy through the following steps: preparing semi-polar (11-22) surface aluminum nitride as a substrate; preparing a nitrogen-doped graphene layer; the nitrogen-doped graphene layer is a single layer of graphene, and the nitrogen-doped graphene layer is transferred to the semipolar (11-22) surface aluminum nitride; and growing a GaN thin film on the nitrogen-doped graphene layer through Van der Waals epitaxy to obtain the semi-polar surface GaN thin film. According to the preparation method for preparing the semi-polar surface GaN thin film based on Van der Waals epitaxy, the semi-polar surface GaN thin film is prepared by adopting the semi-polar AlN substrate based on remote epitaxy in Van der Waals epitaxy, and the nitrogen-doped graphene is adopted, so that the prepared semi-polar surface GaN can eliminate a polarization effect and can be used for preparing the semi-polar surface GaN thin film. And a key material basis is provided for high-performance green light / yellow orange light LEDs, lasers and power electronic devices.

The application relates to the technical field of semiconductor wafer materials, and discloses a multilayer composite oxidation-resistant copper foil and a manufacturing process thereof, which comprises, from inside to outside, a base layer, a buffer layer, an oxidation-resistant layer and a protective layer; the base layer is high-purity electrolytic copper with a purity of not less than 99.99% and a thickness of 10-50 microns; the buffer layer is a nickel-phosphorus alloy coated with a nitrogen-doped graphene@carbon nanotube core-shell structure and has a thickness of 0.5-2 microns; the oxidation-resistant layer is a nanoscale copper oxide@zeolite imidazolate framework material-8 core-shell structure, and the nanoscale copper oxide particles have an average particle size of 5-50 nm; and the protective layer is a poly-p-xylylene film with a thickness of 0.1-0.5 microns. The functional layers are closely combined and cooperated with each other, the buffer layer relieves thermal stress and provides stable support for the oxidation-resistant layer and the protective layer, the multilayer composite structure realizes performance superposition and optimization, and the high-performance and long-service-life requirement of copper foils in the field of electronic devices and the like is met.