267 results about "Oleylamine" patented technology

The application discloses a preparation method of carbon aerogel material for light electromagnetic shielding, and comprises the following steps: adding resorcinol, phloroglucinol, a template agent and formaldehyde into pure water, stirring and dissolving to obtain a precursor solution; adding the precursor solution into white oil containing a surfactant, emulsifying, heating in an oil bath and fully reacting; centrifugal separation to obtain powder, high-temperature carbonization, dispersion in oleylamine, addition into a stock solution containing nickel acetylacetonate, triphenylphosphine and oleylamine, high-temperature reaction and cooling, addition of a mixture of hexane and ethanol to obtain a product; centrifugal separation and washing to obtain light high-electromagnetic-shielding carbon aerogel. The carbon aerogel material for light electromagnetic shielding prepared by the method has the advantages of small density, high efficiency, corrosion resistance, high electromagnetic shielding efficiency, high product yield and the like, and by controlling the nucleation and growth rate of Ni2P, the Ni2P nanoparticles can be uniformly grown on the carbon aerogel microspheres, and the method is suitable for application in large-scale industrial production.

The invention discloses a two-dimensional Pd nanosheet electrocatalyst rich in grain boundary and a preparation method of the two-dimensional Pd nanosheet electrocatalyst, and belongs to the technical field of electrochemical catalysis. The method comprises the following steps: by taking palladium acetylacetonate as a precursor, ascorbic acid and carbon monoxide as reducing agents and oleylamine as a solvent, carrying out heating reaction in a high-temperature reaction kettle; after the reaction is completed, the obtained mixture is cleaned and dried, and finally the ultrathin two-dimensional Pd nanosheet rich in the grain boundary is prepared. According to the preparation method, the active sites of the basal plane can be greatly increased, the electronic structure of the catalyst can be optimized, the catalytic performance and the quality activity can be effectively improved, and the synthesized two-dimensional Pd nanosheet rich in the grain boundary can be used for a fuel cell, a metal-air battery and an efficient electrocatalyst in the electrochemical oxygen reduction process.

The invention provides a method for accurately regulating and controlling the light-emitting wavelength of a mixed halide pure red light perovskite quantum dot, and belongs to the technical field of photoelectric display, and the method specifically comprises the following steps: preparing a first precursor solution based on cesium carbonate, preparing a second precursor solution based on PbI2 and ZnI2, and respectively heating; injecting oleic acid and oleylamine into the second precursor solution, heating, injecting the first precursor solution into the second precursor solution, cooling, heating again, injecting hydrobromic acid to obtain a mixed halogen perovskite quantum dot coarse solution, and centrifuging for multiple times to obtain a CsPbI3-mBrm quantum dot solution. The bromine source is introduced after the quantum dots are formed, accurate regulation and control of the light-emitting wavelength of the pure red light perovskite quantum dots are achieved, the light-emitting requirement of high-color-purity red light is met, and the quantum dots are one of ideal choices of high-efficiency photoelectric devices and display technologies in the future.

The invention discloses tannic acid-oleylamine modified nano molybdenum disulfide as well as a preparation method and application thereof. The preparation method of the tannic acid-oleylamine modified nano-molybdenum disulfide comprises the following steps: 1) dispersing nano-molybdenum disulfide and tannic acid in a solvent, then adding ferric salt for reaction, and then carrying out product separation to obtain the tannic acid modified nano-molybdenum disulfide; and 2) dispersing the tannic acid modified nano molybdenum disulfide and oleylamine in a solvent for reaction, and then carrying out product separation to obtain the tannic acid-oleylamine modified nano molybdenum disulfide. The tannic acid-oleylamine modified nano molybdenum disulfide disclosed by the invention has the advantages of excellent friction reduction and wear resistance, good dispersity in ester oil, good compatibility with other additives and the like, the preparation raw materials are safe and non-toxic, the preparation method is simple, and the tannic acid-oleylamine modified nano molybdenum disulfide is suitable for large-scale industrial production and application.

The invention discloses a demulsifier for a heavy oil field and a preparation method of the demulsifier. The preparation method comprises the following steps: reacting an amine compound with benzyl glycidyl ether and allyl glycidyl ether to obtain a multi-aromatic-ring initiator, then polymerizing the multi-aromatic-ring initiator with epoxypropane and ethylene oxide to form a demulsifier polyether, and carrying out crosslinking modification to obtain a multi-aromatic-ring demulsification component A; synthesizing oleylamine polyether, and modifying to generate a dispersing aid component B which contains oil carboxyl and is of a comb-like structure; the demulsifier for the heavy oil field is prepared from the component A and the component B according to the ratio of 6: (1-2). The demulsifier for the heavy oil field prepared by the preparation method has the advantages of low dosing concentration, good dehydration effect, neat dehydration interface and clear dehydrated water.

The invention relates to the technical field of intermetallic compound catalysts, and particularly discloses a preparation method of a hexagonal layered Pt-Bi intermetallic compound nanocrystalline catalyst, which comprises the following steps: weighing octadecene and oleylamine, and mixing to obtain a solution A; platinum acetylacetonate, bismuth acetate, ascorbic acid and hexadecyl trimethyl ammonium bromide are weighed and sequentially poured into the solution A, and a solution B is obtained through mixing and ultrasonic treatment; heating and preserving heat of the solution B, and naturally cooling to room temperature to obtain a turbid liquid C; and measuring cyclohexane and ethanol, sequentially pouring into the turbid liquid C, carrying out ultrasonic treatment at room temperature for 3 minutes, then pouring out supernate, repeating for 2-3 times, collecting a product, and drying to obtain the nanocrystalline catalyst. According to the invention, the electron interaction between bimetallic components is utilized, the electron structure of a catalytic active center is optimized, the interaction between the active structure and reaction active species is enhanced, the evolution kinetics of a plurality of reaction intermediates such as * O and * OOH in the electrocatalytic oxygen reduction reaction can be obviously accelerated, and the kinetics rate of the four-electron oxygen reduction reaction is improved.

The invention discloses a polymer material, a drug-loaded micelle solution, a drug-loaded micelle composite hydrogel, and a preparation method and application of the drug-loaded micelle composite hydrogel. The polymer material is obtained by reacting oxidized dextran and oleylamine; wherein the oxidized dextran is obtained by oxidizing dextran with the molecular weight of 35000 to 45000; the oxidation degree of the oxidized dextran is 55-70%; the mass ratio of the oxidized dextran to the oleylamine is 1: (1.2-2.0). The polymer material provided by the invention can form a micelle as a carrier to entrap a hydrophobic drug, such as prednisolone. The drug-loaded micelle composite hydrogel provided by the invention can be used for treating inflammatory bowel disease IBD, can avoid damage of an acid environment to a greater extent, and prolongs the administration time.

The invention relates to a preparation method and application of surface passivation red light perovskite quantum dots, and the preparation method comprises the following steps: preparing a monovalent cation precursor from cesium carbonate, oleic acid and 1-octadecene; preparing a lead source precursor from the thiophene-sulfonamide ligand, lead halide, zinc halide, oleylamine, oleic acid and 1-octadecene; thermally injecting the monovalent cation precursor into the lead source precursor, and cooling to prepare a perovskite quantum dot solution; performing anti-solvent purification on the perovskite quantum dot solution to obtain surface passivation red light perovskite quantum dots; the invention also discloses application of the surface passivation red light perovskite quantum dot prepared by the preparation method in preparation of an electroluminescent diode. According to the invention, the purpose of preparing the halogen perovskite quantum dot with excellent optical performance, good stability and excellent performance of the prepared electroluminescent diode is achieved.

The invention relates to a ligand-induced room-temperature ultrathin magnetic nanosheet synthesis preparation method, which comprises: mixing a metal-ligand solution and an anion-ligand solution, and carrying out a heating reaction to obtain a ligand-induced room-temperature ultrathin magnetic nanosheet, wherein the metal-ligand solution comprises a Cu source, a Cr source and a first ligand; the anion-ligand solution comprises an anion X source and a second ligand; x is Se or Te; the first ligand is selected from one or two of oleylamine or oleyl alcohol; the second ligand is selected from one of oleylamine or tri-n-octylphosphine. Compared with the prior art, the method has the advantages that specific crystallographic orientation is stabilized by adjusting the adsorption capacity of ligands and surface ions in an organic liquid phase synthesis mode, anisotropic growth is guided, and the problems that in the prior art, room-temperature ultrathin nanosheet preparation excessively depends on substrate growth, and the steps are tedious are solved.

The invention provides low-temperature sintered silver-copper slurry, a perovskite laminated cell and a preparation method, and belongs to the technical field of crystalline silicon cells. The low-temperature sintered silver-copper paste comprises the following components in parts by mass: 15-30 parts of silver powder; 63-77 parts by mass of silver coated copper powder; the surface of the silver-coated copper powder is coated with acrylic acid and an oleylamine coating agent; 3-15 parts by mass of a resin; 0.2 to 2.8 parts by mass of a curing agent; 0.05 to 0.5 part by mass of a leveling agent; and 0.05 to 0.5 part by mass of a dispersant. The present disclosure achieves low temperature (llt; in addition, the silver-coated copper powder and the silver powder are mixed, the silver powder is replaced with low cost, the material cost is reduced, meanwhile, the silver-coated copper powder forms a three-dimensional conductive network at the low temperature of less than 120 DEG C through metal bonding of a silver shell and contact between particles, and the high conductivity of the electrode is ensured.

The invention discloses a rare earth perovskite quantum dot and a preparation method and application thereof in a solar cell, and belongs to the technical field of perovskite solar cells, and the preparation method comprises the following steps: mixing and stirring erbium salt and ammonium chloride in a solvent in a nitrogen atmosphere, after primary heating and heat preservation heating, adding an oleylamine solution, and continuing heat preservation heating to obtain a rare earth perovskite quantum dot solution; and adding a cesium oleate precursor after secondary temperature rise and heating to a specified temperature, immediately putting into an ice-water bath for cooling, centrifuging and washing the obtained product, and dissolving in chlorobenzene to obtain the rare earth perovskite quantum dot. The rare earth perovskite quantum dot provided by the invention is simple to prepare, is suitable for preparing various cell perovskite layers, and has good universality. Meanwhile, the solar cell provided by the invention has good stability and excellent commercial prospects.

The invention relates to a double-coordination passivated red-light perovskite quantum dot and a preparation method and application thereof. The preparation method comprises the following steps: preparing a monovalent cation precursor from cesium carbonate, 1-octadecene and oleic acid; preparing a lead source precursor from lead halide, zinc halide, 1-octadecene, diisooctyl hypophosphorous acid and oleylamine; thermally injecting the monovalent cation precursor into the lead source precursor, and cooling to prepare a perovskite quantum dot solution; performing anti-solvent purification on the perovskite quantum dot solution to obtain red light perovskite quantum dots; a process of preparing a double-coordination passivated red light perovskite quantum dot from the red light perovskite quantum dot and taurosulfonamide hydrochloride; the invention also discloses an application of the double-coordination passivated red light perovskite quantum dot prepared by the preparation method in preparation of an electroluminescent diode. The post-treatment passivation operation method is simple and convenient, and the quantum dot treated by the double-coordination ligand achieves the purpose of preparing the halide perovskite quantum dot with excellent optical performance and excellent performance of the prepared electroluminescent diode.

The invention discloses a preparation method of a portable paper-based ratiometric fluorescence sensor APBA-CsPbBr3 at-UiO-66 / Ru, which comprises the following steps: 1, adding lead bromide and cesium bromide into N, N-dimethylformamide, then adding 5-bromovaleric acid and an oleylamine ligand, and stirring; 2, perfluorooctyltriethoxysilane is added, and a precursor solution is obtained; 3, adding zirconium chloride and terephthalic acid into N, N-dimethylformamide to obtain a homogeneous solution; 4, after heating, UiO-66 is obtained; 5, stirring the precursor solution, APBA, UiO-66 and tris (2, 2-dipyridyl) ruthenium chloride hexahydrate to obtain a composite material; and 6, dropwise adding the composite material solution into the filter paper. The APBA modified material is adopted as a recognition unit, the APBA modified material and the paper base construct a fluorescence sensing platform, visual quantitative analysis of oxytetracycline in water is achieved, and the device is convenient to carry, low in detection limit, high in anti-interference performance, easy and convenient to operate and suitable for on-site rapid detection of oxytetracycline.

The invention discloses a preparation method of a copper-palladium alloy loaded nano titanium dioxide semiconductor material as a catalyst for a carbon dioxide reduction reaction. Firstly, alloy nanoparticles are generated through a sol-gel method, the morphology of the nanoparticles is controlled and agglomeration is prevented through oleylamine and oleic acid, and borane-tert-butylamine is added at the temperature of 170 DEG C to regulate and control the sizes of the generated alloy nanoparticles. A series of characterizations prove that the catalyst has a very good particle loading condition, uniform particle distribution and increased reaction active sites, and shows excellent activity when being applied to a carbon dioxide reduction reaction, when the loading capacities of copper and palladium are respectively 1%, the activity of the obtained catalyst is the highest, the methane generation rate can reach 20.23 mol / g / h, and the methane generation rate can reach 20.23 mol / g / h. The selectivity of methane reaches 100%.

The application belongs to the technical field of optical materials, and particularly discloses a synthesis method of core-shell quantum dots based on surface activation, which comprises the following steps: S1, preparing a quantum dot core; S2, degassing reaction is carried out on zinc precursor, octadecene and oleylamine in proportion, then the quantum dot core obtained in S1 is injected, a metal alkyl compound is added, and the temperature is increased to 230-250 DEG C; S3, the shell precursor is injected for 3-4 times, the temperature is increased at the same time, the inner shell is grown, zinc stearate and TOP-S are injected again, the ZnS shell is grown, and the InP core-shell quantum dots with regular morphology are obtained. The synthesis method of core-shell quantum dots based on surface activation is adopted, the quantum dots with controllable morphology and size distribution are obtained, the method is suitable for industrial production, and has wide applicability.

The invention discloses an ultraviolet-assisted silicon-coated perovskite quantum dot and a preparation method thereof, and belongs to the technical field of nano materials, and the ultraviolet-assisted silicon-coated perovskite quantum dot is prepared from lead bromide, octadecene, oleic acid, oleylamine, silane and a cesium source through a series of operation steps. According to the ultraviolet-assisted silicon-coated perovskite quantum dot and the preparation method thereof, the required raw materials are simple, the reaction condition is mild, the reaction is rapid, the product generation efficiency is high, the prepared perovskite quantum dot is small in size, silicon coating is complete, the crystallinity is excellent, the fluorescence performance is excellent, and the stability is improved.

The invention discloses a preparation method of a superfine PtIr nanowire catalyst for ammoxidation. The preparation method comprises the following steps: firstly, fully dissolving platinum acetylacetonate, iridium acetylacetonate, tungsten hexacarbonyl and dodecyl trimethyl ammonium bromide in oleylamine to obtain a light yellow solution; carrying out ultrasonic treatment on the obtained light yellow solution until the solution is fully dissolved; and heating the obtained uniform light yellow solution to 190 DEG C in an oil bath, keeping the temperature for 5 hours, centrifuging, washing and drying to obtain the superfine PtIr nanowire catalyst. The nanowire structure has a high specific surface area and abundant active sites, and is beneficial to effective quality and electron transmission. Through alloying of Ir and Pt, the electronic structure on the surface of the catalyst is changed, and the poisoning probability is effectively reduced. Meanwhile, the adsorption and activation process of ammonia molecules is optimized through the synergistic effect between Pt and Ir, the reaction activation energy is reduced, and the reaction rate is remarkably increased. The catalyst not only has remarkable ammonia oxidation catalytic performance, but also is good in stability and simple in preparation process.

The invention relates to the technical field of NBR composite materials, in particular to a low-temperature-resistant wear-resistant NBR composite material and a preparation method and application thereof. The invention provides a low-temperature-resistant wear-resistant NBR (nitrile-butadiene rubber) composite material, which is prepared from the following components in parts by mass: 100 parts of NBR raw rubber, 2 to 6 parts of zinc oxide, 0.5 to 2 parts of stearic acid, 30 to 80 parts of carbon black, 1 to 3 parts of 2-mercaptobenzimidazole, 2 to 12 parts of oleylamine grafted halloysite nanotubes, 0.5 to 2 parts of sulfur and 0.5 to 4 parts of N-cyclohexyl-2-benzothiazole sulfenamide. According to the low-temperature-resistant wear-resistant NBR composite material, the compatibility of the additive and the NBR raw rubber is good, and the blooming phenomenon is avoided.

The application is suitable for the technical field of nanometer material synthesis and application, and provides a preparation method of crystalline PdCN@amorphous PdP core-shell nanoparticles, which comprises the following steps: polyvinylpyrrolidone, L-ascorbic acid and potassium bromide are added into deionized water to form a mixed solution, after preheating of an oil bath, sodium chloropalladate solution is injected, and then transferred to the oil bath for reaction, and after centrifugation and cleaning, cubic Pd nanoparticles are obtained; the cubic Pd nanoparticles are dissolved in dimethyl sulfoxide solution, transferred to a reaction kettle for reaction, and after centrifugation and cleaning, cubic PdCN nanoparticles are obtained; the cubic PdCN nanoparticles are mixed with oleylamine solution, and after adding trioctylphosphine solution and heating, centrifugation and cleaning, the crystalline PdCN@amorphous PdP core-shell nanoparticles are successfully obtained. The reagents used in the application can be purchased on the market and do not need further treatment, the preparation method is simple, and the required equipment is all basic laboratory equipment, without expensive equipment and instruments.

The invention discloses a durable acrylic modified coating for road marking. The durable acrylic modified coating comprises a component A and a component B, the component A comprises modified acrylic resin, a filler, coated glass beads and an auxiliary agent; and the component B comprises isocyanate, a filler and an auxiliary agent. Wherein the modified acrylic resin is acrylic copolymer resin modified by 4-amino-1-hydroxyadamantane. According to the invention, specially prepared modified acrylic resin is adopted as coating matrix resin, carbocyclic rings of 1, 2-epoxy-4-vinylcyclohexane and 4-amino-1-hydroxyadamantane are utilized to improve the hardness and wear resistance of the road marking coating, and a long carbon chain of oleylamine improves the dispersibility between the resin and glass beads and various assistants, so that the service life of the road marking coating is prolonged, and the service life of the road marking coating is prolonged. Meanwhile, the modified acrylic resin has strong adhesive force to the glass beads, so that when the acrylic modified coating is used for road marking, the acrylic modified coating has durable highlighting performance and good wear resistance, and still has good compression resistance, cold resistance and cracking resistance in a low-temperature environment.

The present invention discloses a gadolinium hydroxyoxide ultrafine nanowire composite electrolyte, a preparation method thereof and an application thereof. The preparation method includes: dissolving gadolinium chloride in deionized water, adding ethanol, and obtaining a mixed solution after mixing evenly; adding oleylamine and oleic acid to a hydrothermal autoclave, stirring and mixing, dropping the mixed solution, and carrying out a hydrothermal reaction; adding cyclohexane to the reaction system, ultrasonically dispersing until the solution is transparent, and then adding ethanol, and subjecting the obtained white floccules to sedimentation, centrifugal washing, and drying to obtain ultrafine nanowires; dissolving the ultrafine nanowires in an organic solvent, adding a polyethylene oxide electrolyte solution, mixing evenly, placing the mixture in a polytetrafluoroethylene petri dish, and drying in a vacuum oven to obtain the gadolinium hydroxyoxide ultrafine nanowire composite electrolyte. By adopting ultrafine nanowires, the present invention provides a continuous and fast lithium ion rapid transport channel, improves the mechanical properties and stability of the solid electrolyte, and the assembled solid-state lithium battery has good electrochemical properties.

The application discloses a polarization LED device with adjustable light-emitting color and a preparation method thereof. The preparation method comprises the following steps: mixing cesium oleate, erbium oleate, indium acetate, bismuth acetate, silver acetate, benzoyl chloride, dioctyl ether, oleic acid and oleylamine in proportion, then heating to 120-170 DEG C under a nitrogen atmosphere, reacting for 1-5 min, and stopping the reaction; adding a mixed solution of cyclohexane and ethyl acetate into the reaction solution, centrifuging, collecting the precipitate, repeating the operation, obtaining quantum dots, dispersing the quantum dots in cyclohexane to obtain a quantum dot solution; mixing the quantum dot solution with an inorganic polysilazane solution, ultrasonic dispersing, then heating the mixed solution to 70-90 DEG C, stirring and reacting for 10-15 h, so that the inorganic polysilazane is hydrolyzed to form a dense silicon oxide shell, and a slurry is obtained; preparing the slurry into a film, attaching the film to an LED device, and the polarization LED device with adjustable light-emitting color is obtained. The doping concentration is controlled by introducing a bait ion into a double perovskite system and utilizing energy transfer to realize light-emitting color.

The invention relates to a preparation method of a highly ordered, soft and malleable MXene-based organic-inorganic hybrid superlattice material, which comprises the following steps: carrying out surface modification on hydrochloric acid acidified Ti3C2Tx nanosheet aqueous dispersion by using oleylamine, washing the product with ethanol, drying, and dispersing in trichloromethane; and adding small molecular ligands such as oleic acid into the dispersion liquid, and then carrying out solvent evaporation assembly to obtain the superlattice material with a long-range ordered layered structure. The film shows intrinsic flexibility and can be directly formed into a macroscopic three-dimensional block through physical folding and mold pressing. The mechanical property of the MXene material is fundamentally regulated and controlled through molecular intercalation and ordered assembly, integrated construction from a nanoscale ordered structure to a macroscopic functional material is achieved, and the obtained MXene-based organic-inorganic hybrid superlattice material has electrical conductivity, structural orderliness and good deformability; the method has important application prospects in the fields of flexible electronic devices, deformable electrodes, intelligent sensing and the like.

This application relates to a method for preparing Mn-doped CsPbBr3 nanowires. The method comprises: 1) injecting a cesium oleate precursor solution into a mixed solution A, dispersing the resulting precipitate by centrifugation in an oil-phase solvent, and obtaining a CsPbBr3 nanowire seed solution; 2) injecting the CsPbBr3 nanowire seed solution into a mixed solution B to form Mn-doped CsPbBr3 nanowires, cooling the solution, and centrifuging the resulting precipitate. Mixed solution A is prepared by mixing octadecene, oleic acid, oleylamine, and lead bromide, heating the mixture until the lead bromide is fully dissolved, and then cooling the mixture; mixed solution B is prepared by mixing octadecene and manganese bromide and heating the mixture under an inert gas atmosphere. This method provides sufficient thermal energy for the dopant while minimizing Ostwald maturity, allowing the dopant to diffuse into the crystal without the use of highly corrosive acids. While maintaining the nanowire's shape anisotropy and overall dimensional uniformity, it can produce nanowires with ultra-small diameters, making it an effective method for synthesizing Mn-doped CsPbBr3 nanowires.

The invention relates to the field of paint, in particular to epoxy connecting paint for ships and a preparation method of the epoxy connecting paint. According to the epoxy connecting paint for the ships, a component A is prepared from 15 to 30 parts of epoxy resin A, 10 to 15 parts of epoxy resin B, 0.1 to 1.5 parts of wetting dispersant, 0.5 to 5 parts of anti-settling agent, 0.1 to 0.2 part of defoaming agent, 15 to 20 parts of pigment, 25 to 30 parts of filler, 0.5 to 1.5 parts of adhesion promoter and 25 to 40 parts of first solvent; the epoxy resin B comprises cardanol-based epoxy resin and methoxy polyethylene glycol; the adhesion promoter is prepared from a silane coupling agent, polydopamine and polycaprolactone; the anti-settling agent comprises epoxy group POSS (Polyhedral Oligomeric Silsesquioxane) and polyamide wax; the wetting dispersant comprises oleylamine and poly (butyl acrylate); the component B comprises 80-90 parts of a modified amine curing agent, 1-5 parts of an epoxy accelerator and 5-10 parts of a second solvent; the component A and the component B are mixed according to the weight ratio of (10-15): 1. The epoxy connecting paint for ships has the advantages of higher adhesive force, higher corrosion resistance, higher antifouling property and long-acting stability.

The invention discloses an alkyl glucosamide and copper sulphide compounded pulsed photo-thermal sterilization nano material as well as a preparation method and application thereof. The preparation method of the pulsed photo-thermal sterilization nano material comprises the following steps: dissolving a copper source and a sulfur source in a solution containing oleylamine, and preparing copper sulfide nano particles by adopting a solution thermal injection method; the preparation method comprises the following steps: uniformly mixing alkyl glucosamide, copper sulfide nanoparticles and a cosurfactant in a solvent, and preparing the pulsed photo-thermal sterilization nano material by adopting a self-assembly method, the alkyl glucosamide is C8 to 20 alkyl glucosamide; the cosurfactant is selected from at least one of polyethylene glycol, normal propyl alcohol and isopropyl alcohol; the mass ratio of the alkyl glucosamide to the copper sulfide nanoparticles to the cosurfactant is 1: (0.1-15): (0.1-20). The pulsed photo-thermal sterilization nano material has excellent storage stability, can target MRSA sterilization, has an excellent sterilization rate, and is simple in preparation process.

This invention, applicable to the field of medical contrast agents, provides a method for preparing and applying ultrasmall nano-high-entropy alloys for high-energy computed tomography (CT) imaging. Using a low-temperature oil-phase strategy, the method successfully synthesizes uniformly sized, approximately 5 nm, ultrasmall nano-high-entropy alloys (HEAs) from a mixture of cetyltrimethylammonium chloride and oleylamine, with the addition of a metal source and molybdenum hexacarbonyl, at ambient pressure and temperatures not exceeding 250°C. These ultrasmall nano-HEAs can be used in high-energy CT imaging, exhibiting excellent contrast-enhanced imaging capabilities and maintaining strong X-ray attenuation across a wide range of photon energies, particularly at high photon energies. Not only does their attenuation strength surpass that of the commercial contrast agent iohexol, but they also offer a wider energy range of application, making them valuable for the noninvasive and precise detection and diagnosis of lesions.

The application discloses a core-shell structure perovskite quantum dot, a perovskite quantum dot negative photoresist and a preparation method and application thereof, and belongs to the technical field of nanomaterials. + The core is a CsPbX3 perovskite quantum dot, and the shell is OAm 2‑ forms an ordered double-shell through electrostatic action and [PbX4] + is an oleylamine cation; the shell layer is generated through in-situ self-assembly after a perovskite quantum dot surface is treated by an OAmX ligand, and the perovskite quantum dot negative photoresist comprises a negative photoresist and a core-shell structure perovskite quantum dot. Based on a room-temperature structure conversion strategy of ligand post-treatment, a core-shell structure is formed in-situ to realize high water stability and monodispersity of the perovskite quantum dot, and then a perovskite quantum dot photoresist with high stability and high light-emitting efficiency is prepared.

The application relates to a preparation method and application of a supported platinum-rhodium-copper core-shell nanometer alloy electrocatalyst. The preparation method comprises the following steps: mixing raw materials containing a platinum source, a copper source and a rhodium source, a surfactant and an oleylamine solvent to obtain a mixed solution; the mixed solution is heated to 160-280 DEG C and reacts for 0.5-8 h, and then is cooled; the cooled reaction solution is washed with acetic acid and centrifuged at a speed of not less than 8000 r / min; a product, namely platinum-rhodium-copper alloy nanoparticles, which does not contain the surfactant on the surface, is obtained; the amount of the acetic acid is not less than the volume of the reaction solution; the obtained product and the platinum source are put into the oleylamine solvent, mixed, heated, reacted, cooled and centrifuged to obtain PtRhCu@Pt nanoparticles; the PtRhCu@Pt nanoparticles are mixed with a carbon carrier to obtain a PtRhCu@Pt catalyst. The catalyst prepared by the preparation method has high coating degree of the platinum shell layer on the surface and uniform particle size.

The invention belongs to the technical field of fuel cells, and particularly relates to a platinum-based alloy electrocatalyst for enhancing a built-in electric field based on heterogeneous transformation as well as a preparation method and application of the platinum-based alloy electrocatalyst. The preparation method comprises the following steps: dissolving a soluble platinum salt, a soluble palladium salt, a soluble tin salt and a soluble bismuth salt in a mixed solvent of oleylamine and 1-octadecene, then adding ascorbic acid, and ultrasonically mixing uniformly; the platinum-based alloy electrocatalyst is prepared by the following steps: putting the platinum-based alloy into an oil bath for heating, carrying out two-step heating reaction, washing, centrifuging and collecting, loading activated carbon, and then carrying out electrochemical reconstruction to obtain the platinum-based alloy electrocatalyst based on the heterogeneous transformation enhanced built-in electric field. According to the platinum-based alloy electrocatalyst, a simple wet chemical method is adopted, the prepared platinum-based alloy electrocatalyst for enhancing the built-in electric field based on heterogeneous transformation is subjected to heterogeneous transformation, and the built-in electric field is enhanced, so that the platinum-based alloy electrocatalyst has excellent catalytic activity, toxicity resistance and stability, and has wide application prospects in the fields of ethanol electrocatalysis and fuel cells.