343 results about "Oleylamine" patented technology

The invention relates to flower-like FeCoNiMnPt high-entropy magnetic alloy powder and a preparation method of the flower-like FeCoNiMnPt high-entropy magnetic alloy powder. According to the technical scheme, the preparation method comprises the following steps: respectively dissolving ferric acetylacetonate, cobalt acetylacetonate, nickel acetylacetonate, manganese acetylacetonate and platinum acetylacetonate in oleylamine at equal concentration, and carrying out ultrasonic dispersion to obtain a solution A; respectively dissolving octadecyl trimethyl ammonium bromide and glucose in the solution A at equal concentration, carrying out ultrasonic dispersion, adding the obtained solution B into a sealed container, putting the sealed container into a high-pressure reaction kettle, putting the high-pressure reaction kettle into a hydrothermal oven, carrying out heat preservation and cooling, and taking out the sealed container; the obtained solution C is subjected to centrifugal treatment, washing, drying and cooling, and magnetic alloy powder is obtained; and placing the crucible filled with the magnetic alloy powder in a tubular atmosphere furnace, preserving heat at 450-650 DEG C, and cooling to obtain the flower-like FeCoNiMnPt high-entropy magnetic alloy powder. The preparation method is simple in process, low in cost and high in production efficiency, and the prepared product is large in specific surface area and high in saturation magnetization.

The invention belongs to the technical field of oxygen evolution reaction catalysts, and discloses a high-entropy alloy nano iridium-based catalyst as well as a preparation method and application thereof. The catalyst comprises more than one of a core-shell icosahedron nanocrystal or a high-entropy alloy nanocage; preparation of the core-shell icosahedron nanocrystals: in a protective atmosphere, uniformly mixing hexadecyl trimethyl ammonium chloride, oleylamine, glucose, carbon nanotubes and transition metal salt to obtain a mixture, and heating the mixture to obtain the core-shell icosahedron nanocrystals; the preparation method of the high-entropy alloy nanocage comprises the following steps: dispersing core-shell icosahedron nanocrystals into water containing polyvinylpyrrolidone to obtain a solution A; dissolving ferric chloride, potassium bromide and concentrated hydrochloric acid in water to obtain a solution B; and the solution A is added into the solution B, ultrasonic treatment and uniform mixing are conducted, heating and stirring are conducted, and the high-entropy alloy nanocage is obtained. The catalyst provided by the invention has high catalytic activity, ultrahigh mass activity and excellent stability. The catalyst provided by the invention is used in an oxygen evolution reaction.

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 is suitable for the technical field of luminescent materials, and provides a multi-structure coordinated regulation efficient stable CsPbI3 nanorod and a preparation method and application thereof.The preparation method comprises the following steps that octadecene, oleic acid and cesium carbonate are heated in the inert gas atmosphere and stirred till a solution is dissolved, and a precursor solution is obtained; the preparation method comprises the following steps: adding lead iodide, nitrate, oleic acid and oleylamine into a container filled with octadecene, exhausting gas, introducing inert gas, heating, and stirring to obtain a clear and transparent solution; heating, and injecting the precursor solution in the step 1 into the clear and transparent solution in the step 2; and carrying out heat preservation at first, then rapidly cooling to room temperature, and then centrifugally dispersing into a non-polar solvent to obtain the CsPbI3 nanorod. The method is simple to operate and low in energy consumption, and the red light CsPbI3 perovskite nanocrystal is stable in sample phase, narrow in half-peak width, high in luminous color purity, few in surface defect, high in quantum efficiency and high in carrier transport capacity, and can be applied to the fields of LEDs, solar cells, photoelectric detectors and the like.

The invention discloses a solution-treatable linear polarization low-threshold polarization laser light source and a preparation method thereof, and the preparation method comprises the following steps: mixing cesium carbonate and oleic acid, heating to 100-130 DEG C in an inert atmosphere, carrying out heat preservation for 20-40 min, after reactants are completely dissolved, heating to 140-160 DEG C, and carrying out heat preservation for 10-30 min to obtain a precursor solution A; mixing the precursor solution A, erbium acetate, yttrium acetate, bismuth acetate, silver acetate, sodium oleate, octadecene, 4-chlorobutyric acid and oleylamine according to a set proportion, standing for a set time in an inert atmosphere, stirring and heating to 90-110 DEG C, preserving heat for 0.5-1.5 h, heating to 130-150 DEG C after reactants are completely dissolved, injecting benzoyl chloride, reacting for 1-5 minutes, cooling, and stopping reaction; carrying out solid-liquid separation on the obtained mixed solution, cleaning the quantum dots, then dispersing the quantum dots in a dispersing solvent, adding PHPS into the dispersing solvent, and carrying out ultrasonic mixing; and after the PHPS is fully hydrolyzed, coating a silicon oxide sheet with the solution to prepare a film.

The invention is applicable to the technical field of synthesis and application of nano materials, and provides a preparation method of crystalline PdCN / amorphous PdP core-shell nanoparticles, which comprises the following steps: adding polyvinylpyrrolidone, L-ascorbic acid and potassium bromide into deionized water to form a mixed solution, preheating an oil bath pan, injecting a sodium chloropalladate solution, and stirring to obtain a mixed solution; transferring into an oil bath pan to react, centrifuging and cleaning to obtain cubic Pd nano-particles; dissolving in a dimethyl sulfoxide solution, transferring into a reaction kettle for reaction, centrifuging and cleaning to obtain cubic PdCN nanoparticles; and mixing the cubic PdCN nano-particles with an oleylamine solution, adding a trioctylphosphine solution, heating, centrifuging and cleaning to successfully obtain the crystalline PdCN and amorphous PdP core-shell nano-particles. Reagents used in the method can be purchased on the market and do not need to be further treated, the preparation method is simple, needed equipment is basic laboratory equipment, and expensive equipment and instruments are not needed.

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 oral products, and particularly discloses a manganese tungstate nanoparticle / hydrogen peroxide composition for tooth whitening and a preparation method thereof. The preparation method comprises the following steps: preparing manganese tungstate nano-particles, dispersing tungsten hexacarbonyl and a surfactant in a first organic solvent, adding an oleic acid / oleylamine ligand pair under a first reaction condition, and then carrying out stirring reaction, cooling, centrifuging, washing and drying under a second reaction condition to prepare the manganese tungstate nano-particles. And preparing a manganese tungstate nanoparticle / polyethylene glycol composite material, dispersing the manganese tungstate nanoparticles and a polyethylene glycol derivative in a second organic solvent, uniformly stirring, and carrying out nitrogen drying to prepare the manganese tungstate nanoparticle / polyethylene glycol composite material. The manganese tungstate nanoparticle / polyethylene glycol composite material is dissolved in artificial saliva, a hydrogen peroxide solution is added and mixed, and the manganese tungstate nanoparticle / hydrogen peroxide composition for tooth whitening is prepared.

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 provides an acid response magnetic particle imaging probe and a preparation method and application thereof.The preparation method comprises the steps that S1, a magnetic core, an iron precursor and long-chain alcohol diol are dispersed in a mixed solution of oleic acid, oleylamine, cyclohexane and octadecene, a reaction is conducted for 30-90 minutes under the inert atmosphere condition of 200-300 DEG C, a first non-polar solvent is used for washing, precipitation and centrifugation, and a first non-polar solvent is obtained; the oil-phase double-magnetic core-shell nanoparticles are obtained; s2, preparing water-phase aminated double-magnetic core-shell nanoparticles from the oil-phase double-magnetic core-shell nanoparticles and polymers with amino groups by adopting a film dispersion method or a nano coprecipitation method; s3, the aqueous-phase aminated double-magnetic core-shell nanoparticles and a compound with multiple aldehyde groups are subjected to an aldehyde-amine condensation reaction, a stable imine bond mediated nanometer assembly structure is formed, and the acid response magnetic particle imaging probe is obtained. The probe provided by the invention can respond to the change of the acid microenvironment, has high sensitivity, low background noise and a relatively strong imaging effect, and is suitable for dynamically monitoring diseases related to the acid microenvironment in real time.

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 the technical field of rhinitis medicine preparation, in particular to zirconium-doped cerium oxide nano-enzyme for preparing allergic rhinitis drops and a preparation method of the zirconium-doped cerium oxide nano-enzyme. The preparation method comprises the following steps: step 1, weighing a cerium acetylacetonate (III) hydrate and a zirconium acetylacetonate (IV) hydrate, adding into oleylamine, magnetically stirring and uniformly mixing, and carrying out ultrasonic treatment on the mixture; step 2, putting the mixed solution in the step 1 into a drying oven, heating, preserving heat, and aging to obtain a dark brown colloidal solution; step 3, naturally cooling the colloidal solution to room temperature, adding acetone, centrifuging, discarding supernate, and repeating centrifugal washing for several times; and 4, carrying out vacuum drying on the precipitate obtained in the step 3, and fully grinding to obtain the zirconium-doped cerium oxide nano-enzyme. The prepared zirconium-doped cerium oxide nano-enzyme is applied to preparation of allergic rhinitis drops. The zirconium-doped cerium oxide nano enzyme reduces the inflammatory factor level of the AR mouse and inhibits degranulation of nasal mucosa MCs, so that the pathological state and allergic symptoms of the AR mouse are improved.

The invention discloses an all-inorganic perovskite nanocrystalline composite material and a preparation method and application thereof, and belongs to the technical field of luminescent materials. The preparation method comprises the following steps: mixing lead bromide and octadecene, carrying out first heat treatment, adding oleic acid and oleylamine, and carrying out second heat treatment to obtain a lead bromide precursor solution; mixing and reacting the lead bromide precursor solution with the cesium oleate solution, and cooling to obtain an all-inorganic perovskite nanocrystalline mixed solution; and mixing the full-inorganic perovskite nanocrystalline mixed solution with zinc stearate and dodecanethiol for reaction, centrifuging, and removing the solvent to obtain the full-inorganic perovskite nanocrystal. The preparation method is easy to operate, high in reproducibility, clean, free of pollution and suitable for large-scale production, the effective component of the prepared all-inorganic perovskite nanocrystalline composite material is a heterojunction structure composite material attached with zinc sulfide microspheres, the stability is good, the photoluminescence intensity is high, the sensitivity to pressure is high, and the application prospect is wide. Meanwhile, excellent sensitivity is also realized under low pressure.

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 relates to a preparation method of surface-passivated red-light perovskite quantum dots, which comprises the following steps: preparing an amine sulfate solution from primary amine, sulfuric acid and an organic solvent; preparing a monovalent cation precursor from at least one of cesium carbonate, methylamine and formamidine, oleic acid and 1-octadecene; preparing a lead source precursor from lead halide, zinc halide, oleylamine, oleic acid and 1-octadecene; and thermally injecting the monovalent cation precursor into the lead source precursor, cooling, and injecting an amine sulfate solution to prepare a surface passivation red light perovskite quantum dot solution. The purpose of preparing the halogen perovskite quantum dots with excellent optical performance and good stability is achieved.

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 method for synthesizing CsPbX3 perovskite quantum dots by using a low-temperature polar solvent, which comprises the following steps: 1) preparing a cationic precursor: taking a corresponding required amount of acetate, adding the polar solvent, and taking octanoic acid as a solvent; 2) preparing an anion precursor: taking a polar solvent as a solvent, and adding corresponding halogen acid and oleylamine; and (3) mixing the anion precursor and the cation precursor, adding a certain amount of non-polar solvent during mixing, adding the non-polar solvent during mixing or during preparation of a precursor solution, and stirring and reacting to obtain the perovskite quantum dots, wherein the volume ratio of the non-polar solvent to the polar solvent is 1: 3. The synthetic method has the advantages of high yield, simplicity, low cost and continuous and adjustable light color.

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 a preparation and liquid-phase ligand exchange method of a sulfydryl-free silver telluride colloidal quantum dot, and the sulfydryl-free silver telluride colloidal quantum dot is prepared by adopting oleylamine as a solvent and a ligand for quantum dot synthesis, silver halide as a cationic precursor and organic lithium modified TOP-Te as an anionic precursor through a thermal injection method. The size and the absorption spectrum of the silver telluride quantum dots are adjusted by accurately regulating and controlling the reaction time, the temperature, the halogen type and the organic lithium content. The method is simple to operate and good in repeatability, and the prepared silver telluride quantum dots have excellent size distribution and adjustable absorption wavelength (856-1589 nm). On the basis of oleylamine coordinated silver telluride quantum dots, conductive ink dispersed in polar solvent colloid is obtained by adopting a liquid-phase ligand exchange method which is simple to operate, a flat, compact, crack-free and few-defect high-quality thin film is prepared through a single spin-coating process, and the thin film has application potential in the field of short-wave infrared detectors.

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 discloses a preparation method of all-inorganic perovskite nanocrystals based on liquid phase pulse laser induction, belonging to the technical field of perovskite luminescent materials. The preparation method is: using Cs2CO3 and PbBr2 as reaction precursors, adding n-hexane, oleic acid and oleylamine, and performing irradiation reaction under a 1064nm pulse laser beam; the product after the irradiation reaction is centrifuged once to obtain a supernatant, and the supernatant is centrifuged twice to obtain a solid product perovskite nanocrystal. The invention successfully prepares all-inorganic perovskite nanocrystals with high fluorescence quantum yield under the condition of no inert gas protection by using liquid phase pulse laser radiation technology.