32 results about "Oleylamine" patented technology

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%.

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.

Abstract A coal-based solid waste eco-restoration material and preparation method are provided. The preparation method includes: mixing and placing calcium oleate, sodium silicate, polyvinylpyrrolidone, oleylamine, anhydrous ethanol, and water in a hydrothermal reactor, heating at a constant temperature, centrifuging, and washing to collect inorganic nano-seed crystal; seeding the inorganic nano-seed crystal to form a cementitious material; mixing coal gangue powder with the cementitious material, mineral activator, and physical pore-forming foam, then curing, crushing, and screening to prepare a porous sandy loam matrix; uniformly mixing the prepared porous sandy loam matrix, coal slime, and composite microbial agent, and then fermenting and maturing to obtain the coal-based solid waste eco-restoration material. Compared with the traditional aluminum powder chemical foaming and strong acid foaming, the physical foaming technology adopted in the present disclosure improves the safety of operation while reducing the cost, and is convenient for standardized production. According to the activation of bacteria-fungi composite microbial agent, the nutrient elements in eco-restoration materials can be fully released. The eco-restoration material can be applied to the fields of mine soil restoration, land reclamation and other environmental restoration. FIG. 1 Abstract A coal-based solid waste eco-restoration material and preparation method are provided. The preparation method includes: mixing and placing calcium oleate, sodium silicate, polyvinylpyrrolidone, oleylamine, anhydrous ethanol, and water in a hydrothermal reactor, heating at a constant temperature, centrifuging, and washing to collect inorganic nano-seed crystal; seeding the inorganic nano-seed crystal to form a cementitious material; mixing coal gangue powder with the cementitious material, mineral activator, and physical pore-forming foam, then curing, crushing, and screening to prepare a porous sandy loam matrix; uniformly mixing the prepared porous sandy loam matrix, coal slime, and composite microbial agent, and then fermenting and maturing to obtain the coal-based solid waste eco-restoration material. Compared with the traditional aluminum powder chemical foaming and strong acid foaming, the physical foaming technology adopted in the present disclosure improves the safety of operation while reducing the cost, and is convenient for standardized production. According to the activation of bacteria-fungi composite microbial agent, the nutrient elements in eco-restoration materials can be fully released. The eco-restoration material can be applied to the fields of mine soil restoration, land reclamation and other environmental restoration. Mixing and placing calcium oleate, sodium silicate, S10 polyvinylpyrrolidone, oleylamine, anhydrous ethanol, and water in a hydrothermal reactor, heating at a constant temperature, centrifuging, and washing to collect inorganic nano-seed crystal; Seeding the inorganic nano-seed crystal to form a cementitious S20 material; mixing coal gangue powder with the cementitious material, mineral activator, and physical pore-forming foam, then curing, crushing, and screening to prepare a porous sandy loam matrix; Uniformly mixing the prepared porous sandy loam matrix, coal S30 slime, and composite microbial agent, and then fermenting and maturing to obtain the coal-based solid waste eco-restoration material. FIG. 1 20 25 20 15 77 04 M ar 2 02 5 2 0 2 5 2 0 1 5 7 7 0 4 M a r 2 0 2 5 a n d o t h e r e n v i r o n m e n t a l r e s t o r a t i o n . S 1 0 S 2 0 S 3 0 F I G . 1 2 0 2 5 2 0 1 5 7 7 0 4 M a r 2 0 2 5 a n d o t h e r e n v i r o n m e n t a l r e s t o r a t i o n . S 1 0 S 2 0 S 3 0 F I G . 1 1 / 2 FIG. 1 FIG. 2 1 / 2 Mixing and placing calcium oleate, sodium silicate, S10polyvinylpyrrolidone, oleylamine, anhydrous ethanol, and water in a hydrothermal reactor, heating at a constant temperature, centrifuging, and washing to collect inorganic nano-seed crystal; Seeding the inorganic nano-seed crystal to form a cementitious S20 material; mixing coal gangue powder with the cementitious material, mineral activator, and physical pore-forming foam, then curing, crushing, and screening to prepare a porous sandy loam matrix; Uniformly mixing the prepared porous sandy loam matrix, coal S30 slime, and composite microbial agent, and then fermenting and maturing to obtain the coal-based solid waste eco-restoration material. FIG. 1 Inorganic nano-seed crystal Hydration products 5 um FIG. 2 20 25 20 15 77 04 M ar 2 02 5 S 1 0 2 0 2 5 2 0 1 5 7 7 0 4 M a r 2 0 2 5 S 2 0 S 3 0 F I G . 2 S 1 0 2 0 2 5 2 0 1 5 7 7 0 4 M a r 2 0 2 5 S 2 0 S 3 0 F I G . 2

This invention discloses a PdCu intermetallic compound catalyst, its preparation method, and its application, belonging to the field of electrochemical ammonia synthesis and catalyst preparation technology. The preparation method includes: dispersing palladium acetylacetonate, copper acetylacetonate, glucose monohydrate, a surfactant, and a carbon support in an oleylamine solvent to obtain a mixture; subjecting the mixture to ultrasonic treatment to form a uniform dispersion; subjecting the dispersion to an oil bath reaction; collecting the reaction product, washing, and drying to obtain a PdCu intermetallic compound catalyst supported on a carbon support. The catalyst of this invention achieves approximately 224.25 mgh in the electrocatalytic reduction of nitrate to ammonia under alkaline conditions at -1.3V (vs. RHE). ‑1 mg ‑1 The ammonia yield is high, with a Faraday efficiency of 93.48%. Furthermore, this catalyst can be used as a cathode in zinc-nitrate batteries, achieving both power output and ammonia synthesis, demonstrating promising application prospects.

This invention provides a method for preparing Ni3C / Bi5O7I composite material and its application, relating to the field of photocatalysis technology. The preparation method includes: Step 1: Adding KI to a suspension containing Bi(NO3)3·5H2O and NaOH, stirring, and then carrying out a hydrothermal reaction. The resulting product is cooled to room temperature, centrifuged, washed, and dried to obtain Bi5O7I; Step 2: Adding nickel acetate to an oleylamine aqueous solution under a nitrogen atmosphere, carrying out a hydrothermal reaction, cooling to room temperature, and the resulting precipitate is centrifuged, washed, and dried to obtain Ni3C; Step 3: Adding Bi(NO3)3·5H2O solution dropwise to a suspension containing Bi5O7I and Ni3C under vigorous stirring, and then carrying out a hydrothermal reaction. The resulting precipitate is centrifuged, washed, and vacuum dried to obtain Ni3C / Bi5O7I. This invention improves the photocatalytic activity of Bi5O7I by introducing Ni3C into it, and gives the resulting photocatalytic material the ability to efficiently and stably degrade phenol in water, which has potential application value in the field of phenol-containing wastewater purification.

The application relates to a preparation method of zinc nanosheets and zinc nanosheets prepared by the method, and the preparation method comprises the following steps: mixing a zinc precursor and an organic amine in a solvent to obtain a mixed solution; and heating the mixed solution so that the organic amine reduces the zinc precursor to obtain the zinc nanosheets; wherein the zinc precursor is ZnR2, R is independently selected from alkyl with 2-10 carbon atoms, namely C2-C10 alkyl; the organic amine is oleylamine or alkylamine C n H 2n+1 NH2, and n is an even number in 8-26. In the application, the organic amine plays the roles of a reducing agent and a surfactant at the same time, and reduces the zinc precursor into metallic zinc with a hexagonal nanosheet structure. The preparation method is simple, stable, efficient, the prepared zinc nanosheets are single-crystal structures, uniform in size, less than 10nm in thickness, the size can be regulated in the range of 200nm to 4mu, and the yield can reach 25%.

This invention provides a high-temperature stable fluorinated carbon oil displacement surfactant and its preparation method, belonging to the field of surfactant technology. This application constructs a triazine fluorinated surfactant: First, 1H,1H,2H,2H-perfluorooctane-1-ol is used in the presence of anhydrous potassium carbonate to generate a fluorinated alkoxy anion, which forms a C-O bond with cyanuric chloride, introducing a fluorinated hydrophobic arm; then, sodium N-methyltaurate is introduced to N-substitute the unsubstituted chlorine position, introducing a sulfonate hydrophilic head group, obtaining an intermediate of a fluorinated hydrophobic arm and a taurine hydrophilic arm; then, oleylamine is used to replace the remaining chlorine position, introducing a long-chain hydrocarbon hydrophobic arm, forming a surfactant mixture with an O-N-N triazine structure consisting of a "fluorinated alkoxy arm-taurine hydrophilic arm-oleylamine hydrocarbon arm"; after solvent removal and addition to an ethylene glycol monobutyl ether / water co-solvent system, a stable oil displacement surfactant that is easy to prepare and use on-site is obtained.

The application discloses a kind of gold-silver composite carbon-supported catalysts based on oleylamine ligand and its preparation method and application, belong to the technical field of electrocatalytic carbon dioxide reduction, the gold-silver composite carbon-supported catalyst is by in-situ ligand control obtained dispersion type Au / C catalyst and hydrophobic type Ag nanoparticles mixed grinding obtained composite system.The catalyst surface of the application is modified with long-chain oleylamine Ag nanoparticles (20-60nm) uniformly distributed on Au / C (Au particle size <5nm).The hydrophobic Ag particles establish a hydrophobic layer inside the catalytic layer, and leave CO2 gas transmission channels, not easy to store liquid water, avoid water film completely covering catalyst layer to cause activity decline and voltage rapid growth.

The application belongs to the technical field of biological medicine, and discloses a super-small nanometer radiotherapy sensitizer as well as a preparation method and application thereof. The super-small nanometer radiotherapy sensitizer comprises a super-small hafnium oxide matrix doped with functional metal ions, preferably, the surface of the super-small hafnium oxide matrix doped with functional metal ions has a surface modification layer. The preparation method comprises the following steps: dissolving hafnium source in anhydrous ethanol, adding sufficient trifluoroacetic acid, and constant-temperature stirring, then vacuum rotary evaporation drying to obtain hafnium trifluoroacetate powder; adding the hafnium trifluoroacetate, an organic solution containing metal ions that can be doped into the super-small hafnium oxide matrix and oleylamine into a container and stirring, programmed heating and constant-temperature reaction for a period of time under vacuum or inert gas alternating protection, adding excess ethanol into the container to precipitate after cooling to room temperature, washing and drying the precipitate; then removing the organic matter on the surface of the obtained dry powder to obtain super-small metal ion doped hafnium oxide, i.e. the super-small nanometer radiotherapy sensitizer.

This invention discloses a method for preparing an ultrathin zinc indium sulfide / zinc selenide heterojunction photocatalyst: Step 1, a certain amount of ZnCl2, InCl3·4H2O and oleylamine are mixed and subjected to a first deoxygenation treatment. A mixed solution of 1-dodecanethiol and tert-dodecylmercaptan is rapidly injected under nitrogen conditions and reacted at a certain temperature for a certain time to obtain ultrathin zinc indium sulfide nanosheets. After centrifugation and washing, the nanosheets are redissolved in a certain amount of n-hexane. Step 2, zincacetate, oleic acid and 1-octadecene are mixed and subjected to a second deoxygenation treatment. The mixture is then heated to a certain temperature under nitrogen conditions, reacted for a certain time, and cooled. A certain amount of the solution obtained in step S1 is rapidly injected and subjected to a third deoxygenation treatment. The mixture is then heated under nitrogen conditions, and a certain amount of a mixed solution of Se and TOP is slowly injected at a certain rate. The mixture is then kept at a certain temperature and reacted for a certain time. After the injection process is completed, the reaction is allowed to continue. Finally, the solution is cooled to room temperature and centrifuged to obtain ZIS / ZnSeHNSs.

The application provides a preparation method of a palladium-tin-gallium ternary alloy nanomaterial, which comprises the following steps: A) under the protection of inert gas, mixing a metal palladium precursor, a metal tin precursor, a metal gallium precursor, methylamine hydrochloride, tri-octyl phosphine and oleylamine, and performing a warming reaction to obtain a preliminary reaction solution; and B) further performing a warming reaction on the reaction solution, washing and drying the reaction solution to obtain the palladium-tin-gallium ternary alloy nanomaterial. The preparation method is simple in operation and controllable in reaction conditions, and the obtained nanomaterial is spherical in shape, uniform in size and good in dispersity. The component of the nanomaterial can be accurately controlled by adjusting the feeding ratio of the metal precursors. The carbon-loaded nanomaterial catalyst prepared by loading the nanomaterial on a carbon carrier has excellent catalytic activity and stability for the electrocatalytic oxidation reaction of various alcohols, and has important application prospects in the field of new energy technologies such as direct alcohol fuel cells.

The invention belongs to the technical field of nano materials and biological catalysis, and particularly relates to a preparation method of cerium atom doped palladium particle nano enzyme. The method comprises the following steps: uniformly mixing palladium chloride and cerium chloride which are used as metal precursors, phloroglucinol which is used as a reducing agent and a mixed solution of oleylamine and octadecene which is used as a solvent and a dispersion medium, carrying out high-temperature reaction in a closed reaction kettle, and centrifuging, washing and drying a reaction product to obtain the Ce atom-doped Pd nano-particles with waxberry-shaped morphology. According to the invention, Ce is embedded into a Pd lattice in an atomic-scale dispersion form, and most of Ce is located at the junction of the Pd (111) and Pd (100) crystal faces to form a d-f orbital hybrid structure, so that the electron transfer ability of the material is significantly enhanced. The prepared nano-enzyme has excellent catalase-like activity and oxygenase-like activity at the same time under the weak acid condition, the activity of the two enzymes can be efficiently cascaded, and the catalytic activity is remarkably improved compared with that of the nano-enzyme without Pd doping.

This application provides a method for preparing continuous P-N type aramid flame-retardant thermoelectric fibers based on a gel-state impregnation method, belonging to the field of composite fibers. The preparation method includes: preparing gel-state aramid fibers through wet spinning; uniformly and firmly composited carboxylated carbon nanotubes onto the aramid fibers using a gel-state impregnation method; optimizing the conductive network by removing impurities with ethanol; subsequently, using a zoned selective impregnation process to dope the composite fibers with ferric chloride and oleylamine respectively to achieve P-type and N-type doping, realizing the continuous preparation of integrated P-N homojunctions on the same fiber. The aramid / carbon nanotube thermoelectric fibers prepared in this application possess excellent flame-retardant properties, high-temperature resistance, electrical conductivity, and thermoelectric properties, and achieve a continuous P-N structure on a single fiber, solving the problems of traditional thermoelectric fibers requiring physical splicing and having high contact resistance. It has broad application prospects in fields such as intelligent flame-retardant textiles and flexible wearable devices.

This invention discloses an ultra-low thermal conductivity all-inorganic perovskite cesium bismuth iodide aerogel, its preparation method, and its applications, relating to the field of aerogel technology. The method involves dissolving cesium iodide and bismuth triiodide in a mixed solvent of oleic acid, oleylamine, and octadecene to obtain a cesium bismuth iodide mixed solution; maintaining the cesium bismuth iodide mixed solution at 120-260℃ for 1-48 hours, followed by sequential filtration and purification to obtain a cesium bismuth iodide colloid; aging the cesium bismuth iodide colloid and then drying it to form an ultra-low thermal conductivity all-inorganic perovskite cesium bismuth iodide aerogel. This invention improves the application performance of aerogels in medium- and low-temperature insulation fields by utilizing the ultra-low intrinsic thermal conductivity of the all-inorganic perovskite cesium bismuth iodide, along with its low-temperature thermal stability.

The application provides a high-temperature stable fluorocarbon oil displacement surfactant and a preparation method thereof, and belongs to the technical field of surfactants. A triazine fluorine-containing surfactant is constructed. First, 1H, 1H, 2H, 2H-perfluorooctane-1-alcohol is used to generate a fluorine-containing alkoxy anion under the action of anhydrous potassium carbonate, and a C-O bond is formed with cyanuric chloride to introduce a fluorine-containing hydrophobic arm. Then, N-methyl taurine sodium is introduced to perform N-substitution on the unsubstituted chlorine site, and a sulfonate hydrophilic head group is introduced to obtain a fluorine-containing hydrophobic arm and taurine sulfonate hydrophilic arm intermediate. Then, the remaining chlorine site is substituted with oleylamine to introduce a long-chain carbon and hydrogen hydrophobic arm, forming a surfactant mixture with an O-N-N triazine structure composed of a fluorine-containing alkoxy arm-taurine sulfonate hydrophilic arm-oleylamine carbon and hydrogen arm. After solvent removal and the addition of ethylene glycol monobutyl ether / water auxiliary solubilization system, an oil displacement surfactant with stable morphology and convenient on-site preparation and use is prepared.

The application relates to a double-ligand anchoring rare earth ion doped quantum dot and a preparation method and application thereof, and comprises a quantum dot with a core-shell structure; the core layer and the shell layer of the quantum dot are II-VI compound semiconductors; based on the hard-soft acid-base theory, Ln-based rare earth ions as hard acids are cooperatively anchored by double hard base ligands of oleylamine and fluoride ions, exist in the form of atomic dispersion and / or Ln-Ln diatomic sites in the shell layer and / or the surface of the quantum dot, trivalent rare earth ions can be efficiently, accurately and stably positioned and doped in II-VI quantum dots, the rare earth ion doped quantum dot is fine in appearance and excellent in optical performance, the method is strong in universality, and the application of the material in the high-end optoelectronic field, especially in radiation detection, is expanded, and the material has definite industrialization prospects in the fields of medicine, security check and industrial flaw detection.

This invention relates to the application of tin oxide quantum wire as a catalyst in water dissociation reactions, belonging to the field of catalyst technology. The preparation of the tin oxide quantum wire of this invention includes the following steps: S1, adding a tin source to a mixed solvent composed of oleic acid and oleylamine, stirring until homogeneous, to obtain a precursor solution; S2, adding anhydrous ethanol dropwise to the precursor solution, stirring after addition, followed by sealed heating reaction, natural cooling, centrifugation, washing, purification, and vacuum drying to obtain the tin oxide quantum wire. By precisely controlling the hydroxyl content at the bridging sites of the tin oxide quantum wire, water molecule polarization is accelerated, and H+ is increased. + / OH ‑ The generation rate is increased, and the reverse bias voltage of the bipolar film is reduced, enabling efficient and stable water dissociation. In this application system, the bridge site oxygen vacancy ratio (C...) Ov ) and water dissociation overpotential (η) wd It satisfies a logarithmic function relationship, and the water dissociation activity can be predicted in a targeted manner through material structural parameters.

This invention discloses a concave tetrahedral intermetallic Pt3In / C catalyst, its preparation method, and its applications, belonging to the field of electrocatalysis technology. This catalyst achieves the formation of concave tetrahedral Pt3In nanocrystals from Pt and In precursors at 200–230 °C through synergistic regulation of glucose and CTAC in an oleylamine system. Subsequently, it is loaded onto a carbon support and annealed at low temperature in a H2 and Ar atmosphere, transforming it into a long-range ordered intermetallic Pt3In phase while maintaining its concave morphology. This structure can effectively regulate the electronic state of Pt and weaken phosphate-specific adsorption, thus exhibiting excellent ORR activity and durability in acidic and high-temperature phosphoric acid systems. In a high-temperature proton exchange membrane fuel cell, this catalyst achieves 1.0 W / cm² at 160 °C. −2 Its peak power density is suitable for the preparation and application of high-performance fuel cell cathode catalysts.

A method for preparing a 2D evaporation membrane constructed from a self-assembled two-dimensional superlattice of molybdate-heteropolyblue subnanowires and its application are disclosed. The method involves dissolving phosphomolybdic acid and transition metal chlorides in a mixed solvent system of oleic acid, oleylamine, and ethanol, stirring at room temperature; then pouring the solution into a stainless steel high-pressure reactor lined with PTFE, reacting, cooling to room temperature, and collecting the solid product by centrifugation; washing, and vacuum drying overnight to obtain molybdate-heteropolyblue powder; dispersing the molybdate-heteropolyblue powder in a cyclohexane-ethanol mixed solution, heating the resulting dispersion, filtering it through a hydrophilic filter membrane to form a membrane, and air-drying it overnight to obtain the 2D evaporation membrane constructed from the molybdate-heteropolyblue two-dimensional superlattice. The advantages are: the nanowire structure of this evaporation membrane provides long-range ordered nanoscale water transport channels, and its internal hydrophilic and external hydrophobic properties enhance water management capabilities, thereby promoting efficient water transport and evaporation, enabling efficient and stable solar thermal seawater evaporation.

This invention discloses a method for preparing highly stable CsMnBr3 / ZrO2 core-shell perovskite quantum dots and their fluorescent thin films. The method employs a room-temperature precipitation-hydrolysis coating method, using oleic acid, oleylamine, etc., as ligands to synthesize CsMnBr quantum dot cores. Then, a zirconium source (such as zirconium tert-butoxide) is introduced, and a dense zirconium oxide (ZrO) shell is formed in situ on the quantum dot surface through controlled hydrolysis. Strong chemical bonding is achieved between the core and shell through halogen-zirconium bonds. This method requires no high temperature or inert atmosphere protection and is simple to implement. The resulting core-shell quantum dots are not only completely lead-free, but the zirconium oxide shell simultaneously achieves surface passivation, lattice stability, and physical isolation from water and oxygen. While significantly improving environmental and thermal stability, it perfectly maintains the high fluorescence quantum yield of the quantum dots and enhances stability. The resulting spin-coated fluorescent thin films have great potential for application in optoelectronic devices.

The application relates to the technical field of catalysts, in particular to a precious metal catalyst based on additive manufacturing and a preparation method thereof. The preparation method of the precious metal catalyst based on additive manufacturing comprises the following steps: 1) uniformly mixing chloroplatinic acid hexahydrate, oleylamine and an organic solvent, stirring at 40-50 DEG C for 1-3 hours, then removing the organic solvent to obtain a compound; 2) uniformly mixing the compound prepared in the step 1) with 1,6-hexanediol diacrylate, trimethylolpropane triacrylate, a photoinitiator and a pore former, then adding alumina powder and a dispersant, ball milling, defoaming and preparing a slurry; 3) performing 3D printing on the slurry prepared in the step 2), and cleaning to obtain a green body; 4) first heat treating the green body obtained in the step 3) at 280-330 DEG C for 3-5 hours, then heat treating at 350-450 DEG C for 1-2 hours, then heat treating at 850-950 DEG C in a hydrogen-containing atmosphere for 2-4 hours, and cooling, thereby obtaining the catalyst. The catalyst prepared in the application can greatly reduce the peeling and loss of precious metals.

The application belongs to the technical field of flexible electronics and smart fibers, and discloses a ZnS@PeSiO2 alternating current electroluminescent fiber and a preparation method thereof, which comprises the following steps: I, preparing ZnS@PeSiO2 composite fluorescent powder: (1), preparing a precursor solution and reserving; (2), adding oleic acid and oleylamine and stirring; (3), slowly adding the precursor solution into toluene, stirring, centrifuging, and taking the precipitate; (4), adding toluene and APTES into the precipitate and taking the precipitate; (5), adding toluene suspension containing ZnS nanoparticles into the precipitate and reacting; (6), adding APTES, stirring for 6 hours, collecting the precipitate through centrifugation, and obtaining the ZnS@PeSiO2 composite fluorescent powder; II, preparing a spinning solution; III, wet spinning. The application solves the problems of narrow color gamut, low color purity and high driving voltage of the traditional alternating current electroluminescent fiber, overcomes the defect of photoelectric performance attenuation caused by fabric deformation, guarantees excellent electroluminescent performance of the fiber, and realizes industrialized production of wet spinning.

The application relates to the technical field of lubricating oil, in particular to high-temperature wheel belt lubricating oil and a preparation method thereof.The raw materials of the high-temperature wheel belt lubricating oil include the following components in parts by mass: poly-alpha-olefin 60-100 parts, nano-molybdenum disulfide 5-15 parts, dopamine hydrochloride 1-4 parts, oleylamine treated graphene 1-3 parts, polyhydric alcohol high-viscosity composite ester 5-15 parts, metal soap 10-20 parts, tungsten disulfide 1-2 parts, combustion-resistant agent 1-2 parts, antioxidant 1-2 parts and antifoaming agent 0.1-0.5 parts.The high-temperature wheel belt lubricating oil can maintain stable lubricating performance under extreme working conditions such as high temperature and high load, the raw materials are reasonably matched, the preparation method is simple, the lubricating oil is convenient to use, the application range is wide, and the lubricating oil is suitable for large-scale popularization and application.

The application relates to the technical field of detection, in particular to a lead halide perovskite quantum dot material and a preparation method and application thereof. The method comprises the following steps: mixing a lead source, 1-octadecene, oleylamine, oleic acid and a cesium source, and then carrying out ultrasonic treatment to obtain a mixed solution; placing the mixed solution in a tip ultrasonic instrument, first activating at low power, then improving the power to carry out ultrasonic synthesis reaction, washing the obtained product with a first organic solvent, dispersing the product in a second organic solvent, adding a surfactant, again carrying out ultrasonic treatment and tip ultrasonic activation, and finally preparing the lead halide perovskite quantum dot material. The lead halide perovskite quantum dot CsPbX3 (X is Cl, Br or I) material obtained by the method has excellent quantum dot luminescence performance, good stability in a reverse microemulsion system, can introduce a to-be-detected substance, and realizes quantitative analysis through fluorescence or chroma testing.

This invention discloses a carbon-supported platinum-based catalyst PtV, its preparation method, and its application. 5-30 mg of Pt(acac)₂, 2-20 mg of V(acac)₃, 50-300 mg of CTAB, and 2-30 mg of Ketjenblack are placed in a 30 mL beaker, followed by the addition of 5-40 mL of oleylamine. The mixture is stirred until dissolved and homogeneous, then transferred to a 25 mL reactor and heated. The final product is washed with a mixture of cyclohexane and ethanol by centrifugation and calcined in a muffle furnace to obtain the carbon-supported platinum-based catalyst PtV. This invention utilizes the synergistic effect of Pt and V to reduce the d-band center of Pt, while the addition of CTAB and oleylamine modifies the morphology, exposing more active sites. When used as a cathode catalyst in high-temperature proton exchange membrane fuel cells, it exhibits higher power density and stability than commercial 20% Pt / C catalysts. This method is simple, cost-effective, easy to operate, and suitable for large-scale production.

This invention discloses copper sulfide triangular nanosheets and their preparation method, relating to the field of nanomaterials technology. The specific preparation method is as follows: a copper source is dispersed in oleylamine to obtain mixture A; sulfur powder is dispersed in oleylamine to obtain mixture B; mixture B is injected into mixture A, and the mixture is kept at 70-100℃ for 3-6 hours. After washing, copper sulfide triangular nanosheets with controllable thickness are obtained. The preparation process of this invention has low raw material costs, good process controllability, high controllability of product morphology, uniform size distribution, and excellent quality, which is beneficial for the mass production and industrialization of copper sulfide triangular nanosheets.

This invention discloses an ordered perovskite nanosheet thin film, its preparation method, and a solar cell device. The method includes: first, adding cesium carbonate and oleic acid to a three-necked flask, evacuating the gas, and heating to obtain a cesium oleate precursor solution; then, purging with nitrogen and maintaining the temperature; next, adding lead iodide and octadecene sequentially to the three-necked flask, evacuating the gas, heating, purging with nitrogen, injecting oleic acid and oleylamine, reacting to form a lead iodide precursor solution, injecting it into the lead iodide precursor solution, reacting, quenching, and obtaining a crude perovskite nanosheet solution; purifying and dispersing the crude solution in a nonpolar solvent to obtain a perovskite nanosheet dispersion; dropping the dispersion onto the surface of deionized water, where it self-assembles into a thin film at the gas-liquid interface; then, immersing a substrate perpendicular to the liquid surface into deionized water and pulling it up to transfer the film to the substrate surface, obtaining an ordered perovskite nanosheet thin film. This invention effectively reduces carrier transport resistance and nonradiative recombination, improving the photoelectric performance of the perovskite nanosheet thin film.