117 results about "Octadecene" patented technology

The invention relates to the technical field of rubber asphalt, in particular to a pavement rubber asphalt crack pouring adhesive and a preparation method thereof. The pavement rubber asphalt crack pouring adhesive is prepared from the following components in parts by mass: asphalt, rubber powder, a compatilizer, modified silicon dioxide, a silane coupling agent and an auxiliary agent, according to the pavement rubber asphalt crack pouring adhesive, asphalt, rubber powder and modified silicon dioxide are compounded; the preparation method comprises the following steps: treating nano silicon dioxide by adopting a KH570 silane coupling agent, introducing unsaturated double bonds into the nano silicon dioxide, then carrying out free radical polymerization on the nano silicon dioxide, alpha-octadecene and sulfobetaine methacrylate under the catalysis of BPO, and respectively introducing long-chain alkyl, sulfo and betaine groups into the modified nano silicon dioxide, so as to obtain the modified nano silicon dioxide. The interfacial compatibility among the components is improved, so that the high-temperature stability and the mechanical property of the crack pouring adhesive are improved.

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 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 dye preparation data processing, in particular to a liquid disperse dye suitable for high-temperature and high-pressure dyeing and a preparation method thereof.The dye comprises a composite dye matrix, a dispersion stabilizing system and a solvent medium, disperse black dye is formed by compounding disperse purple 93, disperse orange 288 and disperse blue 291 in the ratio of 1, and the disperse black dye is a liquid disperse dye suitable for high-temperature and high-pressure dyeing. And a nano-scale dispersion system is constructed by combining the synergistic effect of hexadecylamine / octadecylamine polyoxyethylene ether and lauryl amine polyoxyethylene ether. According to the preparation method, on the basis of a dynamic behavior prediction model, micelle formation dynamic data in a premixing stage, viscosity and particle size associated data in a shearing stage and thixotropic index change data in a homogenizing stage are integrated, and a surfactant proportion optimization instruction is generated; according to the invention, the stability of the dispersoid structure is controlled, the dyeing uniformity and color fastness are improved, and the wastewater COD discharge load and the production cost are reduced.

The invention relates to the technical field of semiconductor materials, and discloses a preparation method of band-gap-adjustable high-quality ZnInGa / CuInS / ZnS / ZnS colloidal quantum well nanocrystals, which comprises the following steps: synthesizing ZIGS quantum dots, mixing a zinc precursor, an indium precursor, a gallium precursor, a sulfur precursor, organic acid, organic amine and 1-octadecene, degassing, and heating to synthesize ZIGS nanocrystals; mixing the ZIGS nanocrystal, organic amine and 1-octadecene, degassing, heating, and injecting a copper, indium and sulfur precursor solution to obtain a ZIGS / CIS nanocrystal; mixing the ZIGS / CIS nanocrystal, organic amine and 1-octadecene, degassing, heating, adding a zinc oleate aqueous solution and the sulfur precursor solution a, reacting, and purifying to obtain the ZIGS / CIS / ZnS colloidal quantum well nanocrystal. And repeating the preparation steps of the ZIGS / CIS / ZnS colloidal quantum well nanocrystal to obtain the ZnInGaS / CuInS / ZnS / ZnS colloidal quantum well nanocrystal. According to the cadmium-free ZnInGa / CuInS / ZnS / ZnS colloidal quantum well nanocrystal prepared by the method, the optimal quantum yield is greater than 99%, and the luminescence peak position is tunable in the range of 533-742 nm.

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.

The invention relates to the technical field of chemical pesticides, in particular to a synthesis method of phyllocnistis appendiculata sex pheromone. According to the synthesis method of the phyllocnistis appendiculata sex pheromone, provided by the invention, the synthesis steps are simplified, the yield of most reactions is 90% or above, the synthesis method is simple and convenient, a target product can be obtained in the shortest time, the phyllocnistis appendiculata sex pheromone (10R, 14R)-10, 14-dimethyl octadecene is prepared through 14-step reactions, and the total yield is 38.5%; according to the method, the phyllocnistis appendiculata sex pheromones (5R, 9R)-5, 9-dimethyl octadecane and (5R, 9R)-5, 9-dimethyl heptadecane are prepared through a reaction in 12 steps, and the total yields are 52.8% and 52.3% respectively.

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.

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

The invention 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 present application relates to the technical field of oil and gas field exploitation, and specifically to a drag reducer for oil and gas gathering and transportation and its application, comprising a first polymer molecule and a second polymer molecule, wherein the first polymer molecule and the second polymer molecule are bonded by intermolecular association; the first polymer molecule comprises the following preparation raw materials: hexadecyl methacrylate, ethylene glycol mono-9-octadecene-1-ether, allyl triethylammonium chloride, azobisisoheptonitrile, polyethylene glycol monooctylphenyl ether, hydroxyethyl cellulose, modified nano-alumina, and an interfacial compatibilizer; the second polymer molecule comprises the following preparation raw materials: hexadecyl methacrylate, styrene p-propanesulfonate, 3,7-dimethyl-6-octenoic acid, azobisisoheptonitrile, polyethylene glycol monooctylphenyl ether, hydroxyethyl cellulose, organically modified nano-diatomaceous earth, and an interfacial compatibilizer; the drag reducer prepared by the association of the two specific polymer molecules has strong shear resistance and high drag reduction rate.

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 of a metal oxide packaged perovskite nanocrystal, which comprises the following steps: dissolving an inorganic metal salt in a mixed solvent of water and ethanol to form a first solution; dissolving Cs2CO3, PbBr2, oleylamine and oleic acid in octadecene to form a second solution; injecting the first solution into the second solution, and performing ultrasonic treatment with the power of 300-500W to obtain a third solution; adding epoxypropane into the third solution, continuously performing ultrasonic treatment for 1 to 2 minutes, and standing to form a metal hydroxide packaged CsPbBr3 perovskite nanocrystal; and calcining the CsPbBr3 perovskite nanocrystal packaged by the metal hydroxide under a vacuum condition, so as to obtain the CsPbBr3 perovskite nanocrystal packaged by the metal oxide. The nanocrystal prepared by the invention can keep optical activity under the conditions of humidity, heat and the like.

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 invention relates to the technical field of perovskite quantum dots, in particular to a 6OBA-doped perovskite quantum dot film and a preparation method thereof. Comprising the following steps: preparing a perovskite quantum dot precursor solution; the preparation method comprises the following steps: mixing 6OBA, lead bromide and octadecene, stirring in an argon atmosphere, heating to 115-125 DEG C, and continuing for 0.5-1.5 hours; mixing oleic acid and oleylamine, rapidly injecting by using an injector, and stirring until the mixture is completely dissolved; after the solution is clarified, heating to 175-185 DEG C, starting condensate water, and rapidly injecting a perovskite quantum dot precursor solution; after reacting for 0.5-2 minutes, quickly cooling with an ice-water bath, and terminating the reaction; washing, purifying and dispersing into an organic solvent to obtain quantum dot dispersion liquid; and carrying out spin coating on the quantum dot dispersion liquid to prepare the 6OBA doped perovskite quantum dot film. The method has the advantages that a stable coordination body is formed through 6OBA doping, the defects of the quantum dots are passivated, and the photoluminescence quantum efficiency of the quantum dots is improved.

The invention relates to the technical field of battery diaphragms, and discloses a lithium ion battery diaphragm with high heat resistance and high ionic conductivity and a preparation method thereof. The preparation method comprises the following steps: preparing modified dioxythiophene from divinyl ether and dioxythiophene chloride; the preparation method comprises the following steps: preparing an auxiliary agent from polyvinylidene fluoride, MIL-101-F, 1-octadecene and maleic anhydride, adding the auxiliary agent into slurry containing polyvinylidene fluoride and an MIL-101-F material, uniformly mixing, coating a polyethylene diaphragm with the mixture, and drying to obtain the lithium ion battery diaphragm. Wherein the additive can improve the interface performance between the polyvinylidene fluoride and the polyethylene diaphragm; and the performances such as heat resistance and ionic conductivity of the lithium ion battery diaphragm can be enhanced.

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 invention discloses a preparation method of a small-size stable blue-light CsPbBr3 quantum dot, which comprises the following steps: S1, sequentially adding CsCO, oleic acid and octadecene into a three-neck flask, introducing nitrogen, and reacting at 120 DEG C for 1 hour to obtain cesium oleate; s2, octadecene, PbBr2, NH4Br, oleic acid and oleylamine are sequentially added into a three-neck flask, nitrogen is introduced, the temperature is increased to 120 DEG C from the room temperature in the nitrogen atmosphere so that reactants can be dissolved, then the temperature is adjusted to 25-140 DEG C, after the temperature is stable, a certain amount of cesium oleate at the temperature of 120 DEG C is rapidly injected, after a reaction is conducted for 30-60 s, the three-neck flask is rapidly placed in an ice-water bath to be cooled for 60-120 s, the mixture is taken out of the ice-water bath, and a product is obtained; the preparation method comprises the following steps: adding a mixed solution into normal hexane, stirring, centrifuging at 3500 rpm for 2 minutes, retaining supernatant liquid, adding acetone into the supernatant liquid to obtain turbid liquid, centrifuging the turbid liquid at 3500 rpm for 2 minutes, collecting precipitates, and dispersing the precipitates in the normal hexane to obtain the small-size blue light CsPbBr3 quantum dots. The cost of raw materials is low, a synthesis device is simple, and the fluorescence stability of the obtained CsPbBr3 quantum dots is excellent.