193 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 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 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.

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.

The application discloses a high-fluorescence-quantum-yield Sb 3+ :Cs2NaInCl6 perovskite preparation method belongs to the technical field of inorganic luminescent material preparation. First, cesium chloride, sodium chloride, indium chloride and antimony chloride are mixed and ground, the obtained powder is placed in a vacuum drying box and is treated at 60-300 DEG C for 0.5-2h, a mixture of oleylamine and oleic acid is added, and grinding is continuously performed until the solution becomes uniform, a hydrochloric acid solution with pH=3.2 is added to the product, and after uniform grinding, DOPC is immediately added to the product, and it is observed that the blue fluorescence of the product is strengthened, thereby obtaining high-purity and high-fluorescence-efficiency Sb 3+ :Cs3TbCl6NCs inorganic perovskite. The application realizes Sb doping through mechanical grinding for the first time 3+ :Preparation of Cs2NaInCl6 NCs, and the fluorescence efficiency of the Cs2NaInCl6 NCs is obviously enhanced through post-processing, thereby being Sb 3+ :Application of Cs2NaInCl6 in photoelectricity provides a good prospect.

The invention discloses a ferromagnetic element-doped lanthanum oxychloride two-dimensional material and a preparation method and application thereof, and belongs to the technical field of chemical catalysis, and the method comprises the following steps: dissolving lanthanum acetylacetonate and cobalt salt in oleylamine, uniformly mixing, adding a lanthanum chloride solution into a mixed system, and heating and stirring for reaction in an inert gas atmosphere to obtain a lanthanum oxychloride two-dimensional material; the heating temperature is 300-350 DEG C, the reaction time is 2-15 hours, and washing and drying the obtained product to obtain the ferromagnetic element doped lanthanum oxychloride two-dimensional material. The method is simple in step and mild in reaction condition, and the prepared ferromagnetic element doped lanthanum oxychloride two-dimensional material shows a two-dimensional ferromagnetic Moire superlattice structure at room temperature and can be used for producing high-added-value products such as acetaldehyde, propylene and butylene through photocatalytic conversion of CO2.

The application provides a CsPbBr3 / graphene composite material and a preparation method thereof.The composite material is prepared by using a precursor CsBr, a precursor PbBr2, oleic acid, oleylamine and graphene nanosheets as raw materials through an improved anti-solvent method to realize in-situ growth preparation.The all-inorganic perovskite nanocrystal / graphene structure obtained by the application combines the all-inorganic perovskite layer with high photon absorption and the graphene carrier transport layer, so that the all-inorganic perovskite nanocrystal / graphene structure has high light absorption, high conductivity and strong carrier separation capacity, and provides a reference and reference value for future new high-performance optoelectronic devices.

The embodiment of the present application relates to the technical field of functional materials, and specifically discloses a CuInS2-In2S3 nano-heterojunction catalyst and a preparation method and application thereof, the CuInS2-In2S3 nano-heterojunction catalyst is prepared by using indium chloride, octadecene, oleylamine, sulfur powder and appropriate Cu 1.94 S nanocrystals as raw materials, nucleating In2S3 particles on the Cu 1.94 S nanocrystals through heating reaction, the catalyst has stable structure and stable product performance, exhibits good carbon dioxide reduction catalytic activity, and greatly improves the CO2 reduction product selectivity of CuInS2, thereby solving the problems that the product selectivity of CuInS2 is low in the CO2 reduction, and the small current density limits the catalytic activity and application in the catalytic process in the prior art. Moreover, the preparation method provided by the embodiment of the present application has high controllability, and is simple and efficient compared with the method in the prior art, and has a wide market prospect.

The invention provides a copper sulfide nanowire material and a preparation method and application thereof, copper atoms and sulfur atoms on the surface of the copper sulfide nanowire material exist in the form of compounds, and the main component is a Cu2S phase; the preparation method of the copper sulfide nanowire material comprises the steps that nickel chloride hexahydrate, copper acetylacetonate and dimethyl dioctadecyl ammonium chloride serve as raw materials to prepare a Cu nanowire in the presence of oleylamine, and then the Cu nanowire is subjected to vulcanization treatment to obtain the copper sulfide nanowire material. The preparation method is simple and flexible in reaction, the number of nanoparticles on the surface of the copper sulfide nanowire material can be controlled according to needs, and the prepared copper sulfide nanowire material contains copper sulfide nanowires with the diameter of 20-60 nm. The copper sulfide nanowire material can be applied to CO2 electrochemical catalytic reduction or water electrolysis hydrogen production, and the universality is good.

This invention discloses an indium phosphide quantum dot-bismuth tungstate composite material, its preparation method, and its application, relating to the field of photocatalytic materials technology. The preparation method includes the following steps: Indium precursor is added to oleylamine and mixed; the mixture is gradually heated and kept at a constant temperature under nitrogen protection; then, tris(diphenylphosphine) is added at 170-190°C to react and obtain indium phosphide quantum dots; bismuth nitrate is dispersed in water, and hexadecyltrimethylammonium bromide and sodium tungstate are added sequentially, followed by a hydrothermal reaction to obtain bismuth tungstate microflowers; indium phosphide quantum dots and bismuth tungstate microflowers are added to deionized water, mixed evenly, heated to react, cooled to room temperature, washed, and dried to obtain the indium phosphide quantum dot-bismuth tungstate composite material. This invention also discloses the indium phosphide quantum dot-bismuth tungstate composite material prepared by the above method and its application. This composite material has the function of photocatalytic H2O2 production and has significant application value in the treatment of coking wastewater.

The invention discloses an ultra wide band gap perovskite thin film and application thereof, and belongs to the technical field of solar cells. The ultra-wide-band-gap perovskite thin film is prepared by the following steps: coating a perovskite precursor solution, carrying out post-treatment on a perovskite wet film by using an inducer, and then annealing to obtain a perovskite thin film, the inducer is selected from oleylamine chloride, methylamine chloride, formamidine chloride, guanidine chloride, octyl ammonium chloride, dodecyl trimethyl ammonium chloride, hexadecyl trimethyl ammonium chloride, octadecyl trimethyl ammonium chloride, dimethyl dioctadecyl ammonium chloride and tetradecyl trimethyl ammonium chloride. According to the invention, the chlorine source is introduced as an inducer, and post-treatment is carried out in the wet state of the thin film, so that homogenization of the surface of the thin film is realized, and the process can effectively solve the wrinkle problem of high fluctuation of the surface of the ultra-wide band gap perovskite, and provides a new solution for preparation of an efficient and stable full-perovskite triple-junction solar cell.

The invention provides an intelligent response type platinum nano contrast agent. The intelligent response type platinum nano contrast agent comprises an amphiphilic polymer with a Schiff base bond and oleylamine modified hydrophobic platinum nanoparticles wrapped by the amphiphilic polymer. Compared with an iodine-based CT contrast agent, the platinum nano contrast agent has good biocompatibility, the platinum element with a high atomic number has a higher X-ray mass attenuation coefficient, the amphiphilic PEG shell prolongs the blood circulation half-life period of the platinum nano contrast agent, the carried Schiff base bond can intelligently respond to tumor acidic microenvironment fracture, and the stability of the platinum nano contrast agent is improved. The released La-PtNPs are aggregated in situ through hydrophobic interaction, and enhanced CT imaging and radiotherapy sensitization of tumors can be realized at the same time.

The invention discloses a mixed ligand modified cesium lead halide perovskite nanocrystal and a preparation method thereof, and the preparation method comprises the following steps: (1) adding CsBr and PbBr2 in an equal molar ratio into a P-AMDL polymer solution to obtain a CsPbBr3 precursor solution; (2) injecting the precursor solution into a toluene solvent, and then settling and purifying by using an n-hexane solvent to obtain a P-AMDL modified CsPbBr3 solution; (3) introducing an oleic acid oleylamine ligand to obtain CsPbBr3 modified by a mixed ligand; and (4) optimizing an ion exchange method by combining a mixed ligand strategy to obtain the mixed ligand modified CsPbBrxI3-x. According to the invention, the problem of wide particle size distribution of nanocrystals synthesized by an LARP method at room temperature is solved, and the all-inorganic cesium-lead halide perovskite nanocrystals with fewer defects, more regular morphology and better ultraviolet stability are successfully prepared. The'micromolecule + polymer 'mixed ligand strategy gives consideration to the regulation and control precision of the micromolecule ligand and the stability of the polymer ligand, and is an effective means for optimizing the morphology and performance of the perovskite nanocrystal.

This invention belongs to the field of hollow multi-component nanomaterial preparation technology, specifically disclosing a hollow Cu3NbSe4 nanomaterial, its preparation method, and its application. The microstructure of the nanomaterial is a nanoscale hollow cubic structure. The preparation method includes: (1) dissolving niobium source and selenium source separately in oleylamine solvent by heating for later use; (2) treating the soluble copper source and the niobium source dissolved in (1) in a high-boiling-point organic solvent for deoxygenation and dehydration, and then carrying out a solvothermal reaction; (3) when (2) is heated to a certain temperature, injecting the selenium source dissolved in (1) to carry out a solvothermal reaction, and separating the obtained solid product after the reaction is completed. The synthesis process of this invention is simple, the reaction conditions are mild, and the energy consumption and cost are low; more importantly, it realizes the preparation of hollow Cu3NbSe4 nanomaterial with uniform morphology and size, high crystallinity, and stronger light absorption capacity, and the prepared hollow Cu3NbSe4 shows excellent performance in photocatalytic hydrogen production.