88 results about "Octadecene" patented technology

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 relates to the field of luminescent carbon nanomaterials, in particular to a water-soluble carbon dot-based afterglow luminescent material based on a multi-carboxyl carbon source and a preparation method of the water-soluble carbon dot-based afterglow luminescent material. The preparation method comprises the following steps: step 1, uniformly mixing a Y (CH3CO2) 3 solution, oleic acid and 1-octadecene according to a formula ratio; 2, heating to 120-160 DEG C, reacting for 20-50 minutes, then cooling to 40-60 DEG C, preserving heat, and adding a NaOH methanol solution and an NH4F methanol solution; step 3, adding organic acid, wherein the organic acid contains at least two carboxyl groups; and 4, heating to 90-120 DEG C, vacuumizing, then heating to 280-320 DEG C, reacting for 1-3 hours in a nitrogen atmosphere, naturally cooling to room temperature, and carrying out post-treatment to obtain the water-soluble CDs (at) NaYF4 composite material. According to the preparation method, the water-soluble carbon dot-based afterglow luminescent material based on the multi-carboxyl carbon source, which is stable in structure and good in dispersity, can be prepared, and the water-soluble carbon dot-based afterglow luminescent material has the advantages of long service life and wide application range.

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 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 provides a Fe-Co-Ni series nano-alloy and a preparation method and application thereof, and belongs to the technical field of functional materials. The alloy is prepared by the following steps of: weighing and proportioning 0.5 mmol of each element by taking chlorate or acetylacetonate or acetate of iron, cobalt, nickel, manganese, copper, zinc and the like with the purity of more than 99.5% and other metal chlorides which are rich in earth surface and economical and practical as precursors, putting the precursors into a pressure-resistant bottle, taking n-trioctylphosphine oxide (TOPO) as a ligand, taking ethanol and 1-octadecene (ODE) as a mixed solvent, and uniformly stirring to prepare the alloy. And synthesizing the hexagonal nano-alloy at low temperature by using a wet chemical method. The method can be used for synthesizing 3-10-element medium-entropy and high-entropy alloy, and has a wide application prospect. The synthesis is a precise process which is guided by an organic ligand, is coordinated by multiple metals and is subjected to nucleation-self-assembly-anisotropic growth.

This invention discloses a phosphorus-free composite polyamine boiler water treatment agent, its preparation method, and its application, belonging to the fields of chemical and water treatment technology. The water treatment agent is made from the following raw materials in parts by weight: 9-15 parts diethylenetriamine, 1-6 parts N-9-octadecene-1,3-propanediamine, 18-20 parts tannin, 1-6 parts cyclohexylamine, 10-24 parts polycarboxylic acid, and 30-60 parts deionized water. In preparation, the polycarboxylic acid is dissolved in deionized water, and N-9-octadecene-1,3-propanediamine, cyclohexylamine, diethylenetriamine, and tannin are added sequentially. After stirring at room temperature, the mixture is allowed to stand. The water treatment agent of this invention is phosphorus-free and has the functions of scale inhibition, corrosion inhibition, passivation, pre-filming, deoxygenation, desiliconization, scale dispersion and online removal of steam turbine salt deposits. It has a scale inhibition rate of ≥98%, a corrosion inhibition rate of ≤0.025mm / a and a deoxygenation efficiency of ≥97%. It can be adapted to high-pressure, subcritical and supercritical power plant boilers, is easy to prepare and suitable for industrial application.

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 invention relates to a high-crystallization mercury-based II-VI group nanocrystal synthesis method based on an octadecene-amine mixed solvent. The method comprises the following steps: providing a mercury-containing compound as a mercury source; providing a precursor solution capable of releasing II-VI group element anions; octadecene and an amine-containing surfactant are mixed in proportion to serve as a reaction solvent; injecting the precursor solution into a reaction solvent containing a mercury source in an inert atmosphere, and reacting under the condition that the temperature is lower than the thermal injection temperature to generate the mercury-based II-VI group nanocrystal with small size and higher crystal quality; and cooling and purifying the reaction product to obtain the target nanocrystal. By mixing the non-polar solvent and the amine surfactant, the concentration of the surfactant is reduced, the growth rate of the crystal is slowed down, the low-temperature controllable reaction is realized, the nanocrystal of which the particle size is 2-5nm and the crystal quality is remarkably improved is obtained, and the half-peak width of an X-ray diffraction pattern can be less than 0.7 degree (2 theta). The problems that the crystal size is difficult to control and the crystal quality is insufficient in a traditional method are solved.

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 present invention provides: a method for producing Fe2C nanoparticles, by which Fe2C nanoparticles are produced by a simple process by a one-step reaction; and a reduction catalyst which comprises Fe2C nanoparticles. The present invention relates to a method for producing Fe2C nanoparticles, the method including heating and mixing an iron carbonyl compound, a halide, a boron compound, and an alkylamine under an inert gas atmosphere, wherein the iron carbonyl compound comprises Fe3(CO)12 or Fe2(CO)9, the boron compound comprises a diboron compound that contains a heterocyclic ring represented by general formula (I) (wherein the description of the symbols is omitted), and 1-octadecene is not used. The temperature during the heating and mixing is preferably 80°C or higher and lower than 350°C. The time of the heating and mixing is preferably 2.5-50 hours.

This invention discloses a sex pheromone antagonist for the poplar leafminer moth and its application. The active ingredient of the sex pheromone antagonist is cis-13-octadecene-15-ynyl alcohol. The sex pheromone antagonist of this invention can interfere with the orientation of male poplar leafminer moths towards females, causing males to become disoriented, thereby reducing the probability of encounters between males and females, interfering with mating, reducing the reproductive rate, and gradually controlling the extinction of the pest population, thus achieving the purpose of pest control. This invention can significantly reduce the damage caused by the poplar leafminer moth and is also environmentally friendly.

The invention belongs to the technical field of optical materials, and particularly discloses a surface activation-based core-shell quantum dot synthesis method which comprises the following steps: S1, preparing a quantum dot core; s2, mixing a zinc precursor, octadecene and oleylamine according to a ratio, carrying out a degassing reaction, then injecting the quantum dot core obtained in S1, adding a metal alkyl compound, and heating to 230-250 DEG C; and S3, injecting the shell layer precursor for 3-4 times, simultaneously heating, growing an inner shell, injecting zinc stearate and TOP-S, growing a ZnS shell, and obtaining the InP core-shell quantum dot with regular morphology. According to the method for synthesizing the core-shell quantum dots based on surface activation, the quantum dots with controllable morphology and size distribution are obtained, and the method is suitable for industrial production and has wide applicability.

The present invention relates to the compound 2-hydroxy-octadecene-9-cis-oate for use in the treatment of oncological pathologies including grade IV glioblastoma with native IDH, grade 3 glioma, embryonal tumour, pituitary tumour, meningioma, haemangiopericytoma, haemangioblastoma, mesothelioma, bile duct adenocarcinoma, exocrine pancreatic cancer, neuroendocrine pancreatic cancer, rectal cancer, urachal cancer, adenocarcinoma of the bladder and oesophageal cancer, and for the treatment of neuropathic pain caused by diabetic peripheral neuropathy, spinal cord injury, post-herpetic neuralgia, chemotherapeutic agent, antitumour agent, cancer, fibromyalgia or hepatitis. The present invention also relates to the pharmaceutical composition comprising 2-hydroxy-octadecene-9-cis-oate.

The application provides an antigen nanoparticle and a preparation method and vaccine preparation application thereof, and relates to the technical field of biotechnology.The antigen nanoparticle provided by the application comprises an antigen and poly( maleic anhydride-ALT-1-octadecene) grafted with polyethylene glycol, the antigen nanoparticle has good stability and high immunocompetence, and can be used for the preparation of a vaccine.The preparation method of the antigen nanoparticle provided by the application is convenient to operate, parameters are controllable, reproducibility is good, and the reaction is carried out in a water environment, the condition is mild, and the influence on the structure of the antigen is small.The vaccine provided by the application comprises the antigen nanoparticle and an adjuvant, and the inventor has found that the antigen nanoparticle and the adjuvant have a synergistic effect, and the combination of the two can further improve the immunization effect of the vaccine.

The invention discloses a preparation method and application of oleylamine grafted polyethylene, polyethylene is grafted with 9-octadecene amine (oleylamine) under the action of an initiator by adopting a melt blending method, the prepared oleylamine polyethylene graft and a small amount of stearic acid are added into a melt blended inorganic powder filled polyethylene system, and the oleylamine grafted polyethylene is prepared. On the basis of not carrying out pre-surface treatment on the inorganic powder material, the mechanical property of the composite material is remarkably improved, and the purposes of simplifying the technological process and improving the performance are achieved.

The application discloses a kind of heterogeneous nanostructured materials and its controllable synthesis preparation method, belong to nanometer material technical field.This method with alkali metal rare earth fluoride nanorod seed, oleic acid and octadecene as growth system, by adding alkali metal rare earth fluoride precursor solution and the lattice mismatch degree between host-guest material is regulated, realize the accurate customization of heterogeneous nano material morphology.According to the quantitative regulation of mismatch degree: when longitudinal mismatch degree δ 纵 <2.0%, transverse mismatch degree δ 横 <1.0% when obtaining uniformly wrapped nanorod;When 2.0%≤δ 纵 <3.1%, 1.0%≤δ 横 <1.7% when obtaining nanoring wrapped nanorod;When 3.1%≤δ 纵 ≤5.1%, 1.7%≤δ 横 ≤2.3% when obtaining nanorod wrapped by nanoscale island.The application realizes the quantitative regulation of heteroepitaxial growth mode by lattice mismatch engineering, provides a new idea for the design of multifunctional integrated heterogeneous nano material.

The invention discloses a CdSe / CdxZn1-xS quantum rod with high polarization degree and high luminous efficiency and a preparation method of the CdSe / CdxZn1-xS quantum rod. The quantum rod comprises a CdSe core and a CdxZn1-xS shell layer, wherein the CdSe core is coated with the CdxZn1-xS shell layer; the preparation method comprises the following steps: (1) preparing a CdO precursor solution in an inert gas environment, heating to a reaction temperature of 350 + / -20 DEG C, and then sequentially injecting tri-n-octylphosphine and a CdSe precursor solution to obtain a first mixed solution; (2) slowly dropwise adding a Zn precursor solution into the first mixed solution in the step (1) to obtain a second mixed solution; (3) injecting octadecene into the second mixed solution obtained in the step (2) for dilution, then slowly dropwise adding a mixed solution of octadecene and the S precursor solution, and stopping the reaction after dropwise adding to obtain a CdSe / CdxZn1-xS quantum rod; and (4) after the reaction is completed, cooling to room temperature, and purifying to obtain the CdSe / CdxZn1-xS quantum rod. The CdSe core is coated with the CdxZn1-xS alloy type shell layer structure, so that the polarization degree and the luminous efficiency of the quantum rod are improved.

The invention relates to a preparation method of CdZnS / ZnSe / ZnS parabolic energy band structure quantum dots. The preparation method comprises the following steps: preparing an S-ODE precursor solution, an S-TOP precursor solution and a Se-TBP precursor solution; preparing a CdZnS core solution from cadmium oxide, zinc acetate, oleic acid, 1-octadecene and the S-ODE precursor solution; preparing a CdZnS / ZnSe solution from zinc acetate, oleic acid, 1-octadecene, the CdZnS core solution and the Se-TBP precursor solution; the preparation method comprises the following steps: preparing a CdZnS / ZnSe / ZnS parabolic band structure quantum dot solution from zinc acetate, oleic acid, a 1-octadecene CdZnS / ZnSe solution and an S-TOP precursor solution; according to the invention, efficient and stable pure blue light emission is realized through a preparation method of three-shell collaborative design of a CdZnS core, a ZnSe intermediate layer and a ZnS shell.

The application discloses molybdenum-doped nano zinc oxide with high visible light photocatalytic performance and a preparation method and application thereof. The molybdenum-doped nano zinc oxide is prepared from 1-octadecene, 1-dodecanol, oleic acid, a zinc source and a molybdenum source through vacuum degassing treatment, uniform stirring under a nitrogen atmosphere, heating to 100-140 DEG C, keeping warm until solid particles are dissolved, heating to 220-250 DEG C, keeping warm for 0.5-1 h of reaction, and cooling, washing and drying. The molybdenum-doped nano zinc oxide produces a local surface plasmon resonance absorption peak in the range of 600-700 nm through molybdenum ion doping, and the nano powder has a diameter of 5-20 nm; and the visible light photocatalytic performance of the zinc oxide material is greatly improved under the condition of visible light.

The invention discloses a quantum rod with stable chirality and a preparation method thereof.The preparation method of the quantum rod with stable chirality comprises the steps that zinc stearate is dissolved in octadecene under the high-temperature condition, a selenium source is added to form a Se-TOP solution, and a ZnSe core solution is successfully prepared; purifying the ZnSe core, and dispersing the ZnSe core in a TOP solution to obtain a ZnSe-TOP core mother solution; then, the ZnSe-TOP core mother liquor is added into a reaction solution composed of a Cd precursor and a sulfur precursor, epitaxial growth is carried out under the high-temperature condition, and ZnSe / CdS quantum rods with different length-diameter ratios are obtained; and carrying out ligand exchange reaction on chiral cysteine and the surface of the quantum rod to obtain the II-type chiral ZnSe / CdS quantum rod. The prepared II-type quantum rod has good optical performance and stable chiral effect, and the chiral optical effect is not affected by the space structure of the core / shell structure of the quantum rod.

The invention belongs to the technical field of catalysts, and particularly relates to a preparation method of a catalytic cracking reaction composite metal catalyst and application of the catalytic cracking reaction composite metal catalyst in preparation of vinylidene chloride, and the preparation method of the catalytic cracking reaction composite metal catalyst comprises the following steps: (1) mixing a chitosan solution and an acetic acid solution, adjusting the pH value to obtain a mixed solution, adding the zinc lactate solution into the mixed solution, and uniformly mixing to obtain a zinc chelate solution; (2) mixing the zinc chelate solution, an aluminum-containing compound, a silicon-containing compound and a template agent to form slurry, performing spray granulation to form molecular sieve particles, and performing crystallization, washing and drying to obtain zinc-containing molecular sieve microspheres; (3) mixing cesium sulfate, oleic acid and octadecene for reaction to obtain a cesium oleate solution; and (4) dispersing the zinc-containing molecular sieve microspheres into a cesium oleate solution for reaction to obtain the composite metal catalyst for catalytic cracking reaction. According to the preparation process, the process conditions are optimized, and a perfect catalytic system is formed.

The present application belongs to the technical field of catalysts, and particularly relates to a preparation method of a catalytic cracking reaction composite metal catalyst and application thereof in preparation of vinylidene chloride, the preparation method of the catalytic cracking reaction composite metal catalyst comprising the following steps: (1) mixing a chitosan solution with an acetic acid solution, adjusting pH to obtain a mixed solution, and then adding a zinc lactate solution into the mixed solution and mixing uniformly to obtain a zinc chelate solution; (2) mixing the zinc chelate solution, an aluminum-containing compound, a silicon-containing compound and a template agent to form a slurry, forming molecular sieve particles through spray granulation, crystallizing, washing and drying to obtain zinc-containing molecular sieve microspheres; (3) mixing cesium sulfate, oleic acid and octadecene to obtain a cesium oleate solution through a mixing reaction; and (4) dispersing the zinc-containing molecular sieve microspheres into the cesium oleate solution to react, and obtaining the catalytic cracking reaction composite metal catalyst. The present application optimizes process conditions in the preparation process, and forms a perfect catalytic system.

The invention relates to a heat-preservation heat-insulation high-pressure-resistant polypropylene material which comprises the following components in parts by mass: polypropylene resin, hollow glass fibers, modified nano ATO, hollow glass beads, an antioxidant, latex powder, a nucleating agent and a lubricant, wherein the modified nano ATO is a product obtained by carrying out MPS coupling on nano ATO and then carrying out copolymerization on the nano ATO, octadecene and acrylate. A long alkyl chain of octadecene is introduced into the modified nano ATO, the polarity of the modified nano ATO is similar to that of polypropylene, and the modified nano ATO and the polypropylene are arranged more tightly through intermolecular acting force and intertwining cross-linking between molecular chain segments; the modified nano ATO contains oxygen-containing groups such as ester groups and the like to form hydrogen-bond interaction with hydroxyl groups on the surfaces of the hollow glass fibers, so that the nano ATO simultaneously generates strong interaction with a polypropylene matrix and the hollow glass fibers, the modified nano ATO has excellent compatibility and stability with other components, and the mechanical properties such as pressure resistance and the like of the polypropylene material are remarkably improved.

The application discloses a kind of sulfur gallium zinc copper / titanium dioxide composite photocatalyst and its preparation method and application, belong to inorganic catalyst preparation field, preparation method is to Cu (dedtc) 2, Ga (dedtc) 3, Zn (dedtc) 2, TiO2 and oleylamine, n-dodecanethiol, and 1-octadecene are added to reaction container, reaction liquid is heated to 90-120 DEG C and preheated, under preheating temperature, vacuum is extracted for 10~30min;Then temperature is raised to 200~280 DEG C, under N2 atmosphere, reaction is 0.5~1.5h, after cooling, with n-hexane ultrasonic washing, after drying, sulfur gallium zinc copper / titanium dioxide composite photocatalyst is obtained.The composite photocatalyst prepared by the application has good photocatalytic activity and stability.

The invention discloses a PbS quantum dot and a preparation method and application thereof. The preparation method comprises the following steps: uniformly mixing lead oxide, oleic acid and octadecene, vacuumizing, heating to a first section temperature, and preserving heat; introducing inert gas, vacuumizing, heating to a second section temperature, reacting, injecting an octadecene solution containing bis (trimethylsilyl) sulfide after the reaction is completed, continuing the reaction, injecting n-hexane or n-octane after the reaction is completed to terminate the reaction, cooling the reaction liquid to 0-2 DEG C in an ice bath, and standing the reaction liquid at 0-2 DEG C; and after standing, centrifuging, and washing and drying the centrifuged supernatant liquid to obtain the PbS quantum dots. According to the preparation method of the PbS quantum dots, normal hexane or normal octane quenching reaction is adopted, and standing treatment is performed at 0-2 DEG C, so that residual impurities in the PbS quantum dots can be removed, and the purity and quality of the PbS quantum dots are improved.

The invention relates to the technical field of nano materials, in particular to an amine ligand modified Yb < 3 + > doped CsPbCl3 nano crystal material and a preparation method thereof.The preparation method comprises the following steps that soluble Pb salt, soluble Yb salt, a cesium acetate ethanol solution, an amine ligand, oleic acid and octadecene are mixed, and a mixed reaction solution is obtained; the preparation method comprises the following steps: preparing a mixed reaction solution, heating the mixed reaction solution in a protective atmosphere, adding a mixed solution containing trimethylchlorosilane and ODE, terminating the reaction in an ice-water bath to obtain a turbid liquid, and centrifuging the turbid liquid to obtain the amine ligand modified Yb < 3 + > doped CsPbCl3 nanocrystal material. Along with the reduction of the amine chain length, the morphology of the nanocrystal is converted into a nanosheet from a nanocube, and the prepared crystal material has higher luminous efficiency and stability.

The invention discloses a method for synthesizing lead-free Cu: CsBr perovskite (Cu: CsBr NCs) stable in an aqueous solution by using a one-pot method, which comprises the following steps of: selecting cesium carbonate, copper bromide and citric acid as reactants, and oleic acid and oleylamine as surface ligands, adding a proper amount of octadecene or mineral oil, performing ultrasonic treatment to obtain a Cu: CsBr-coated CC solution, and centrifuging, purifying and drying the solution to obtain the lead-free Cu: CsBr-coated CC perovskite (Cu: CsBr NCs) stable in the aqueous solution. Cu: CsBr (at) CC powder is obtained. The method disclosed by the invention is simple to operate, short in time and good in repeatability, can be synthesized by only one step, and the prepared compound is good in solubility in an aqueous solution, excellent in dispersity, stable in fluorescence and easy to store.

The invention is applicable to the technical field of materials, and provides a customized lead selenide quantum dot preparation method, which comprises: preparing a lead oleate precursor and a trioctylphosphine-selenium precursor in advance; the temperature of the lead oleate precursor in the first reaction container is stabilized to 170-250 DEG C, after the trioctylphosphine-selenium precursor is injected, the temperature is reduced to 135-215 DEG C, and meanwhile, a second reaction container containing octadecene is heated to the same temperature; transferring the thermocouple and the heating jacket of the container II to the container I, keeping the temperature at 135-215 DEG C, reacting for 15 minutes, adding methylbenzene, and quenching in an ice-water bath; and after subpackaging the product, carrying out centrifugal purification twice by using methanol / ethanol, trichloromethane and acetone to obtain the lead selenide quantum dot with the adjustable luminescence peak position of 1200-2500nm. Continuous adjustment of the spectrum and the half-peak width can be achieved, PLQY can be improved by adding phenylethyl ammonium chloride, uniform particle size is guaranteed through the double-container design, operation is easy, convenient and repeatable, the material can be excited by multiple wavelengths, and the method is suitable for the field of optical devices.

The present application relates to a kind of sulfonate ligand modified perovskite quantum dots, belong to perovskite quantum dot technical field.It includes the following steps:S1: cesium source, octadecene and oleic acid are mixed, vacuum drying is carried out, inert gas is passed and heated, and first mixed solution is obtained;S2: lead bromide, octadecene, oleylamine, oleic acid and octylamine methyl sulfonate are mixed, vacuum drying is carried out, under inert gas heating, first mixed solution is further added, after reaction, quenching, purification, and the solution of the sulfonate ligand modified perovskite quantum dots is obtained.The present application uses octylamine methyl sulfonate multi-ligand to passivate perovskite quantum dots in the process of quantum dot preparation, effectively reduces the vacancy defects caused by the increase of surface area due to the size reduction in the process of quantum dot synthesis, strengthens the combination between ligand and quantum dot, makes the particle size of quantum dot more uniform, and further improves the luminescent performance and stability of perovskite quantum dots.