41 results about "Copper acetylacetonate" patented technology

The invention discloses a bimetallic-based catalyst for promoting CO2 absorption-desorption cycle of an alcohol amine solution as well as a preparation method and application of the bimetallic-based catalyst, an MCM-41 molecular sieve with a high specific surface area and an ordered mesoporous structure is taken as a carrier, Zr (SO4) 2 and copper acetylacetonate are loaded as bimetallic active components, the catalyst has a proper acid site and good surface acidity, and the catalyst can be applied to CO2 absorption-desorption cycle of an alcohol amine solution. The decomposition of bicarbonate ions is accelerated, the fracture bond energy of C-N is reduced, the carbon dioxide desorption performance of MEA and a water-poor system is enhanced, and the energy consumption is reduced. Compared with the prior art, the molecular sieve catalyst is synthesized by adopting a one-step hydrothermal method, and the process is simple; the catalyst is not only suitable for a traditional MEA aqueous solution, but also effective in a novel water-poor amine liquid system, and provides an energy-saving solution for different carbon capture processes. After the catalyst is subjected to five times of absorption-desorption cycles, the catalytic activity of the catalyst can still be kept at 90% or above of an initial value, and good cycle stability is shown.

The application discloses a preparation method of Fe single-atom and Cu cluster co-doped nitrogen-carbon material and application of the material in full-pH oxygen reduction electrocatalysis. The ZIF-8 with a three-dimensional and rich pore structure is used as a framework, and Fe@ZIF-8 is prepared by using a solvothermal method. Then, copper acetylacetonate is used as a copper source, and the copper acetylacetonate molecules dispersed in the gas phase are adsorbed on the surface of the ZIF-8 by using the rich pore structure of the ZIF-8 and the low sublimation temperature of the metal acetylacetonate salt. Finally, pyrolysis is carried out under nitrogen or inert atmosphere, so as to form the Fe single-atom and Cu cluster co-doped nitrogen-carbon material. The material is subjected to electrochemical test under acidic, neutral and alkaline conditions, and the material exhibits high oxygen reduction electrocatalysis performance in the full-pH range and has good stability. The material has good performance as a cathode catalyst in a fuel cell, an alkaline / neutral zinc-air battery, and has high application value.

The present invention discloses a Ru-Cu amorphous nano-alloy for a lithium carbon dioxide battery cathode catalyst and a preparation method thereof, wherein the morphology is a lamellar nanostructure with a thickness of 5 to 100 nm. The preparation method is as follows: ruthenium acetylacetonate, copper acetylacetonate and potassium bromide are dissolved in a mixed solution of ethanol and water to obtain a light red liquid after complete dissolution; the liquid is dried at 80 to 100 ° C for 8 to 16 hours to obtain a solid powder; in an air atmosphere, calcined at 260 to 280 ° C for 60 to 120 minutes, followed by natural cooling; finally, it is obtained by grinding, washing and drying. The Ru-Cu amorphous nano-alloy obtained by the present invention can be used to prepare a lithium carbon dioxide battery cathode, which can greatly increase the decomposition rate of lithium carbonate, solve the key problems such as high charging voltage and low energy efficiency of lithium carbon dioxide batteries, and achieve the purpose of improving the charge and discharge performance of lithium carbon dioxide batteries.

The application belongs to the technical field of nanomaterials, and provides ascorbic acid oxidation mimetic enzyme and preparation thereof. The application adopts a methanol solution of zinc nitrate, copper acetylacetonate and 2-methyl imidazole to perform a hydrothermal reaction, and obtains the ascorbic acid oxidation mimetic enzyme by oxygen isolation calcination of a hydrothermal product. The copper-nitrogen-carbon nanomaterial obtained by the application has a rhombohedron structure, can specifically oxidize ascorbic acid, and can be applied to ascorbic acid content detection, oxidized ascorbic acid preparation and dehydroascorbic acid preparation as ascorbic acid oxidation enzyme mimetic enzyme. The nanomaterial can maintain ascorbic acid oxidation mimetic enzyme activity under acid, alkaline and high temperature conditions; the steady-state kinetic parameter (Michaelis constant is 0.012 mM) is better than that of natural ascorbic acid oxidation enzyme, and the ascorbic acid oxidation mimetic enzyme activity of the material has a broad application prospect in the fields of nanozyme, nanotechnology and biological analysis detection.

The present invention relates to the field of cable technology and proposes a long-life cable for nuclear power use. The cable comprises, from the inside out, a conductor, an insulation layer, a shielding layer, and a sheath layer. The sheath layer comprises the following components by weight: 60-70 parts high-density polyethylene, 12-22 parts carboxylated nitrile rubber, 4-8 parts styrene-acrylonitrile copolymer, 0.5-8 parts copper-based metal organic complex, 8-15 parts palygorskite powder, 2-5 parts zinc oxide, 0.5-1.3 parts antioxidant, 1-3 parts plasticizer, and 0.2-0.5 parts vulcanizing agent. The copper-based metal organic complex comprises copper trifluoromethanesulfonate and copper acetylacetonate in a weight ratio of 1-3:1. This technical solution solves the problem of poor aging resistance of sheath layers in nuclear power cables in the related art.

The invention discloses a preparation method and application of a porous iridium nano-metal catalyst, and belongs to the field of material synthesis and electro-catalysis. Iridium acetylacetonate and copper acetylacetonate are used as precursors, an IrCu alloy nanosphere precursor is prepared through solvothermal reaction in an ethylene glycol and surfactant system, copper is removed through acid etching, and the porous iridium nano spherical catalyst (Ir-NS) is obtained. The catalyst has a three-dimensional porous spherical structure, active sites are concentrated on the surfaces of nanospheres and the edges of the walls of internal mesopores, catalytic active sites are enhanced due to the iridium nanosphere structure and uniform site exposure density, oxygen bubbles are quickly released, and the active sites are prevented from being covered by the bubbles. In an acid medium and proton exchange membrane water electrolysis anode oxygen evolution reaction, the catalyst shows low overpotential and long-term operation stability under low iridium loading capacity. The method is simple in process and low in cost, does not need an additional hard template, and has a good industrial application prospect.

The invention discloses a copper-zinc double-active metal site adsorbent with atom dispersion, a preparation method thereof and application of the copper-zinc double-active metal site adsorbent in adsorption of sulfonamide antibiotics. The preparation method comprises the following steps: carrying out solvothermal reaction on a methanol solution containing copper acetylacetonate, zinc acetate and 2-methylimidazole in a mass ratio of (0.12-0.24): (0.8-0.9): (1.3-1.4), taking a solid after the reaction is ended, washing, drying, and calcining in an inert atmosphere to obtain the copper-zinc double-active metal site adsorbent with atom dispersion. The adsorbent has the following prominent advantages that copper and zinc are anchored to a nitrogen-rich carbon skeleton in a monatomic form, copper and copper diatoms exist on the surface, and the utilization rate is high; the synergistic effect of the nitrogen-doped carbon matrix and active sites of copper and zinc endows the material with an adjustable electronic structure; the porous carbon structure provides a stable anchoring point for metal atoms, metal dissolution is effectively inhibited, and secondary pollution is avoided.

The invention discloses a high-temperature-resistant epoxy molding compound for electronic packaging and a preparation method thereof, and relates to the field of electronic packaging materials. The invention aims to solve the problem that the epoxy molding compound prepared in the prior art is poor in high temperature resistance and cannot meet the higher working temperature requirement of a new generation of semiconductors. The invention discloses a high-temperature-resistant epoxy molding compound for electronic packaging. The high-temperature-resistant epoxy molding compound is prepared from the following components in percentage by mass: 10%-15% of o-cresol formaldehyde epoxy resin, 12%-18% of dicyclopentadiene cyanate ester, 0.1%-0.5% of copper acetylacetonate, 70%-80% of inorganic filler, 1%-2% of a coupling agent, 0.5%-1% of a release agent and 0.1%-0.5% of carbon black. A triazine ring structure with a high cross-linking characteristic is introduced into a resin matrix, so that the heat resistance is excellent; the prepared high-temperature-resistant epoxy molding compound for electronic packaging has the characteristics of high heat resistance, low dielectric constant, high breakdown field strength, high mechanical strength and the like, and is applied to the field of electronic packaging.

The invention relates to a mesoporous carbon composite material as well as a preparation method and application thereof. The mesoporous carbon composite material comprises nitrogen-doped hollow mesoporous carbon and metal single atoms loaded on the nitrogen-doped hollow mesoporous carbon. The invention also provides a preparation method of the mesoporous carbon composite material, which comprises the following steps: adding 3-aminophenol and formaldehyde into alkaline water, then adding into a mixed solution of an organic solvent and alkali, then sequentially adding hexadecyl trimethyl ammonium bromide, ethyl silicate and N, N-dimethylformamide, and calcining the product in a nitrogen atmosphere to obtain the mesoporous carbon composite material. And then mixing with a mixed solution of copper acetylacetonate and an organic solvent, adding into an acetone solution, carrying out heating reaction after ultrasonic treatment, and calcining in a nitrogen atmosphere to obtain the mesoporous carbon composite material. The invention also provides application of the mesoporous carbon composite material as a catalyst. The problem that an existing catalyst is low in degradation efficiency is solved, and the problem that an existing catalyst is large in dosage is also solved.

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

The application discloses a carbon dot / copper nanocomposite for a solid propellant combustion catalyst, uses carbon dots and copper acetylacetonate as reaction precursors, uses water and N,N'-dimethylformamide as mixed reaction solvents, reduces divalent copper ions into nanometer copper elements in a hydrothermal process by using the reducing property of the carbon dots, and performs in-situ growth, and finally obtains the carbon dot / copper nanocomposite. The application can effectively exert the synergistic effect of the carbon dots and nanometer metal copper, has high combustion catalytic performance on energetic materials, and can be used for combustion catalysis of the solid propellant.

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.

The invention relates to the technical field of preparation of catalysts, in particular to a solar-driven CO2 conversion molten medium catalyst, a preparation method and application of the solar-driven CO2 conversion molten medium catalyst in a CO2 trapping and separating system, and the solar-driven CO2 conversion molten medium catalyst comprises the following preparation steps: S1, preparing a modified carrier; s2, molten metal is heated to be completely molten, modified molten salt is added, stirring is conducted, and emulsion is obtained; and S3, adding the modified carrier and copper acetylacetonate into the emulsion, carrying out ultrasonic-assisted dispersion in a molten state, cooling, soaking in an ionic liquid, and drying to obtain the catalyst. The synergistic effect of light and heat is realized in a melting system through the synergistic effect of the modified carrier and the modified molten salt, so that electron excitation initiated by light energy and surface reaction kinetics promoted by heat energy supplement each other, the overall conversion efficiency of CO2 is greatly improved, the dual functions of efficient trapping and in-situ catalytic conversion are achieved, and the catalyst has a good application prospect. Complex procedures of separation, compression and storage after CO2 capture in a traditional process are omitted, and the process flow is remarkably simplified.

A dental ceramic blank comprising at least one organic compound, characterized in that the blank has an open-pore ceramic framework, wherein the open-pore ceramic framework is selected from an open-pore dental ceramic framework comprising zirconia, aluminum oxide, a mixed oxide comprising zirconia, and / or silicon carbide, wherein the open-pore ceramic framework contains 2 to 50 wt.% of at least one organic compound selected from a) comprising at least one polymerizable monomer and / or a mixture of polymerizable monomers, thermal initiators comprising peroxide and / or an azo compound or a redox system comprising a peroxide, and a reducing agent selected from ascorbic acid, an ascorbic acid derivative, barbituric acid or a barbituric acid derivative, sulfinic acid, a sulfinic acid derivative or a redox system (aa) barbituric acid or thiobarbituric acid or a barbituric acid or thiobarbituric acid derivative and (bb) at least one copper salt or copper complex and (cc) at least one compound with an ionic halogen atom, particularly preferably a redox system comprising 1-benzyl-5-phenylbarbituric acid, copper acetylacetonate and benzyldibutylammonium chloride, and / or b) a polymer of the aforementioned monomers polymerized in the blank with respect to the overall composition of the dental ceramic blank.

The invention discloses a preparation method and application of an iron-copper diatomic nano-enzyme, and relates to a preparation method and application of a nano-enzyme. The invention aims to solve the problem that the clinical application of the traditional treatment means is often limited and challenged by severe systemic toxicity, drug resistance and tumor recurrence although the traditional treatment means improve the survival rate of patients. The method comprises the following steps: 1, dissolving dimethylimidazole in absolute methanol, and stirring to obtain a solution A; step 2, dissolving zinc nitrate hexahydrate, ferric ammonium citrate and copper acetylacetonate in absolute methanol, and stirring to obtain a solution B; 3, mixing and stirring the solution A and the solution B, centrifuging, washing and drying to obtain a white sample ZIF-8; and step 4, pyrolyzing the white sample ZIF-8 at 900 DEG C to obtain black powder, namely the iron-copper diatomic nano-enzyme. The invention belongs to the technical field of active oxygen mediated tumor treatment.

The invention particularly relates to a self-repairing polyurethane hot melt adhesive and a preparation method thereof. The preparation method comprises the following steps: mixing polycaprolactone glycol, polycarbonate 1, 6-hexanediol ester glycol and a solvent to obtain a material A; mixing dicyclohexylmethane diisocyanate, isophorone diisocyanate and a solvent, adding a catalyst, and preserving heat to obtain a material B; mixing an end-capping reagent and a solvent to obtain a material C; mixing copper acetylacetonate and stearic acid, adding a solvent, and mixing to obtain a material D; dropwise adding the material B into the material A for reaction, then adding the material C for reaction, and then dropwise adding the material D for reaction; 2, 2 '-dithiodiethanol is added into the first mixture for a reaction, then the material D is dropwise added for a reaction, and then tackifying resin and a compatilizer are added for heat preservation; and adding a filler and silane coupling agent mixture and an auxiliary agent into the mixture II, and carrying out melt blending granulation. The hot melt adhesive has good bonding performance, self-repairing performance and solvent resistance.

A preparation method of the high-entropy alloy catalyst comprises the following steps: S1, weighing ferric acetylacetonate, cobalt acetylacetonate, nickel acetylacetonate, copper acetylacetonate and molybdenum acetylacetonate according to an equal molar ratio as metal sources, and then adding ketjen black; s2, dispersing the mixture in a mixed solvent of acetone and ethylene glycol, continuously stirring until the system is uniformly mixed, and carrying out solvothermal reaction at the temperature of 200-220 DEG C for 24-36 hours; and S3, after the reaction is finished, collecting a product through centrifugal separation, and drying to obtain the product. According to the composite material, the conversion kinetics and the actual utilization rate of active substances in the zinc-iodine battery can be obviously improved, the shuttle effect is effectively inhibited, electron transmission is accelerated by virtue of the excellent conductivity of Ketjen black, and the cycling stability and the rate capability of the zinc-iodine battery are obviously improved.

The application discloses a one-dimensional carbon-coated copper selenide nanowire coaxial heterostructure material, a preparation method and application thereof. The preparation method comprises the following steps: adopting a vacuum chemical vapor transport method to heat and decompose copper acetylacetonate under a sealed condition to form a carbon-coated copper nanowire material, and then performing annealing treatment to obtain a one-dimensional carbon-coated copper nanowire material; and adopting a chemical vapor deposition method to perform selenization on the one-dimensional carbon-coated copper nanowire material by using a selenium source to obtain a one-dimensional carbon-coated copper selenide nanowire coaxial heterostructure material. The one-dimensional carbon-coated copper selenide nanowire coaxial heterostructure material is synthesized by using a vacuum chemical vapor transport and secondary selenization method, and the preparation efficiency is improved. Meanwhile, the one-dimensional structure of the one-dimensional carbon-coated copper selenide nanowire material has a relatively high specific surface area, and the external carbon layer improves the electronic conductivity and stability of the copper selenide, and the one-dimensional carbon-coated copper selenide nanowire material has a relatively high charge and discharge specific capacity.

The invention discloses a gold-copper intermetallic compound superlattice array and a preparation method and application thereof. The preparation method comprises the following steps: firstly, preparing gold nanoparticles; then adding a toluene solution of oleylamine into the gold nanoparticles, mixing and oscillating, taking an upper layer oleylamine phase, and standing; dissolving copper acetylacetonate in an oleylamine solution, and adding the upper oleylamine phase for reaction to obtain gold-copper nanoparticles; and adding oleic acid into the gold-copper nanoparticles for modification to form superlattices, dropwise adding the superlattices into a diethylene glycol solution, and naturally evaporating to obtain the gold-copper intermetallic compound superlattice array. A gold-copper intermetallic compound is synthesized by adopting a high-temperature hydrothermal method, an atomic-scale long-range ordered structure is synthesized, functional molecules such as oleylamine and oleic acid are modified, a long-range ordered periodic structure is spontaneously arranged under non-covalent interaction, an electron energy band structure, carrier transport efficiency and light absorption characteristics can be regulated and controlled, and the photoelectric conversion efficiency is improved. The method has wide application potential in multiple fields.

The invention discloses a positive electrode material for a water-based Zn-I2 battery, an electrode plate, a preparation method of the electrode plate and the battery, and belongs to the field of batteries, the positive electrode material for the water-based Zn-I2 battery comprises copper acetylacetonate Cu (acac) 2 and activated carbon; the problem of multi-iodide shuttling is solved, and meanwhile, the problems of poor conductivity of iodine and slow reaction kinetics are solved.

The invention discloses a benzenediol synthesis catalyst with a high para-ortho ratio under a mild condition as well as a preparation method and application of the benzenediol synthesis catalyst. The preparation method comprises the following steps: providing a SiO2 nanosphere solution prepared from tetraethyl silicate; dopamine hydrochloride and copper acetylacetonate are sequentially added into the SiO2 nanosphere solution, stirring reaction is carried out, the mass ratio of the dopamine hydrochloride to the tetraethyl silicate is 0.1-0.15, and the molar ratio of the copper acetylacetonate to the tetraethyl silicate is 0.04-0.14; centrifuging, washing and drying the reaction product; carrying out high-temperature carbonization treatment in a nitrogen atmosphere, wherein the flow rate of nitrogen is controlled within a range of 20-60 mL / min; and grinding the carbonized sample to obtain the SiO2 coated C / Cu catalyst.

The invention discloses a method for carrying out electrocatalytic hydrogenation on alkynol by using a copper acetylacetonate molecular catalyst, which comprises the following steps: mixing a copper acetylacetonate-loaded catalyst, a dispersant and a binder, and carrying out ultrasonic treatment to form catalyst slurry; coating a conductive substrate with the catalyst slurry to obtain a working electrode; the method comprises the following steps: carrying out electrolytic reaction in an H-type electrolytic tank or a flow type electrolytic tank, applying external potential under the condition that a reference electrode, an auxiliary electrode and a working electrode are arranged, so as to realize selective semi-hydrogenation of an alkynol substrate and generate an enol product, wherein an anolyte is a potassium hydroxide solution, and a catholyte is a mixed solution of KOH and the alkynol substrate, and applying external potential under the condition that the reference electrode, the auxiliary electrode and the working electrode are arranged. The electro-catalytic hydrogenation system taking the copper acetylacetonate molecular catalyst as the core has applicability and effectiveness in various alkynol substrates, has good universality and process stability, can realize high-selectivity enol synthesis under normal temperature and normal pressure conditions, remarkably reduces energy consumption, and is suitable for industrial production. And potential safety hazards caused by traditional high-pressure hydrogen are avoided.

The application relates to a preparation method of a catalyst for selective catalytic reduction of NO, and aims to solve the technical problems of existing denitration molecular sieve catalysts Cu- SAPO-34, such as easy agglomeration of active sites, poor low-temperature activity, poor hydrothermal stability, poor water resistance and poor sulfur resistance. The method comprises the following steps: taking pseudo-boehmite, H3PO4, white carbon black, triethylamine, tetraethylenepentamine and a copper organic complex to prepare a sol-gel; the copper organic complex is acetylacetone copper, glycine copper or dihydroxyethylenediamine copper; the sol-gel is subjected to hydrothermal reaction, the obtained precursor is calcined, and a Cu-modified SAPO-34 composite material is obtained. The material has a denitration conversion rate of 90% to 100% at 150 DEG C to 430 DEG C, has N2 selectivity, is resistant to water vapor and sulfur dioxide, and can be used in the field of NH3-SCR denitration.

The present application relates to the technical field of high polymer coating, and discloses an anti-adhesion steel formwork coating and a preparation method thereof, the coating is prepared by mixing and curing an A agent and a B agent; the A agent contains, in terms of weight parts, 100 parts of bisphenol A type liquid epoxy resin, 10-15 parts of long-chain aliphatic mono-epoxy active diluent, 5-8 parts of mixed solvent, 0.8-2.0 parts of zinc acetylacetone and 0.05-0.15 parts of copper acetylacetone; and the B agent is 45-64 parts of siloxane modified phenolic amine prepolymer. By covalently anchoring the siloxane chain segment in the crosslinked network, the loss of the anti-adhesion substance is avoided; the coordination steric hindrance effect of zinc ions is used to inhibit the initial reaction heat release, thereby prolonging the pot life; the long-chain aliphatic diluent constructs a hydrophobic shielding layer to block the penetration of strong alkali ions, thereby improving the saponification life; and the dynamic color change mechanism of the copper acetylacetone provides an intuitive indication for material mixing and dry state.

The invention relates to the technical field of preparation of photoacid generators, in particular to a preparation method and application of (4-fluorophenyl) diphenyl sulfonium trifluoromethanesulfonic acid. The preparation method comprises the following steps: mixing p-iodofluorobenzene, fluorobenzene and m-chloroperoxybenzoic acid to obtain a mixed raw material; carrying out substitution reaction on trifluoromethanesulfonic acid and the mixed raw material to obtain an intermediate product; wherein the intermediate product has a structural formula shown as a formula 1, and in the formula 1, TfO is a trifluoromethanesulfonic acid anion; under the condition that copper acetylacetonate is used as a catalyst, diphenyl sulfide and the intermediate product are subjected to a catalytic reaction, and the (4-fluorophenyl) diphenyl sulfonium trifluoromethanesulfonic acid is obtained. The preparation method can effectively and synchronously improve the yield of the (4-fluorophenyl) diphenylsulfonium trifluoromethanesulfonic acid to 70% or above and the purity of the (4-fluorophenyl) diphenylsulfonium trifluoromethanesulfonic acid to 99.0% or above based on coordination of reaction step-by-step refinement, electronic effect, structural stability and catalytic action.

The invention belongs to the technical field of organic synthesis, and discloses a synthesis method of N, N '-diphenyl-N, N'-bis (4-methylphenyl)-4, 4 '-biphenyl diamine. According to the method, 4-methyldiphenylamine and 4, 4 '-dibromodiphenyl are taken as raw materials, copper acetylacetonate is taken as a catalyst, N, N'-bis (4-hydroxy-2, 6-dimethyl phenyl) amide is taken as a ligand, potassium hydroxide is taken as alkali, dimethyl sulfoxide is taken as a solvent, and a coupling reaction is carried out at 100-120 DEG C in an inert atmosphere. And after the reaction, carrying out post-treatment including acid regulation, methanol precipitation, toluene dissolution, activated carbon decoloration and recrystallization to obtain the high-purity p-TPD. The cheap catalyst and ligand are adopted, the dosage is only 0.5 mol%, the reaction temperature is mild, operation is easy and convenient, the molar yield reaches up to 91.3%, the production cost is remarkably reduced, the method is suitable for industrial production, and an efficient synthesis approach is provided for organic photoelectric materials.

The invention relates to a preparation method and application of a copper-manganese double-site composite catalyst. The method adopts a two-step sequential construction method, and comprises the following steps: firstly, stably anchoring Mn monatomic sites on C3N4 (at) CNT through a high-temperature pyrolysis-pickling process, so as to form Mn1-C3N4 (at) CNT; then, a CuOx cluster is selectively loaded on the precursor through a solvothermal reaction; wherein ethylene glycol is used as a solvent and a reducing agent, copper acetylacetonate is used as a copper source, it is ensured that a small-size CuOx cluster is controllably formed on the surface with the Mn-N4 structure, strong electron interaction between the small-size CuOx cluster and the copper acetylacetonate is established, and the proximity and the synergistic effect of Cu and Mn sites are achieved. The catalyst obtained by the invention has a remarkable effect when being applied to synthesis of urea by coupling carbon dioxide and nitrite C-N.

The invention relates to the technical field of carbon material preparation, in particular to a copper / nickel-nitrogen-carbon double-atom catalyst and a preparation method and application thereof.The preparation method includes the steps that copper acetylacetonate and nickel acetylacetonate serve as metal sources, polyacrylonitrile serves as a spinning aid, N, N-dimethylformamide serves as a solvent, polystyrene serves as a pore-foaming agent, the materials are mixed to be uniform and then magnetically stirred for 8 h, and a mixture is obtained; and carrying out electrospinning, placing the obtained film in a carbonization furnace, carrying out air pre-oxidation, and then heating in an argon atmosphere to prepare the copper / nickel-nitrogen-carbon diatomic catalyst. The prepared copper / nickel-nitrogen-carbon double-atom catalyst has an adjustable copper and nickel atom coordination environment, modulation of the copper and nickel metal coordination environment can be achieved by controlling the proportion of copper and nickel metal precursors, and the copper / nickel-nitrogen-carbon double-atom catalyst has excellent catalytic performance.

The present application relates to a kind of mesoporous carbon composite material and its preparation method and application.Mesoporous carbon composite material includes nitrogen-doped hollow mesoporous carbon and metal monatomic atom loaded on the nitrogen-doped hollow mesoporous carbon.The present application also provides the preparation method of mesoporous carbon composite material, including: adding 3-amino phenol and formaldehyde into alkali water, then adding the mixed solution of organic solvent and alkali, then adding cetyltrimethylammonium bromide, ethyl silicate and N, N-dimethylformamide in sequence, the product is calcined in nitrogen atmosphere, then mixed with the mixed solution of copper acetylacetonate and organic solvent, add in acetone solution, after ultrasonic heating reaction, calcined in nitrogen atmosphere, obtain mesoporous carbon composite material.The present application also provides the application of mesoporous carbon composite material as catalyst.The present application solves the problem of low degradation efficiency of existing catalyst, also solves the problem of large amount of existing catalyst.

The invention discloses a high-entropy alloy nano-enzyme as well as a preparation method and application thereof. Belongs to the technical field of metal functional material preparation. Specific acetylacetone non-noble metal salts (iron acetylacetonate, cobalt acetylacetonate, nickel acetylacetonate and copper acetylacetonate) are matched with acetylacetone noble metal salts, meanwhile, the preparation method is optimized, and the high-entropy alloy nano-enzyme is processed at the specific heating temperature per minute during annealing. The small-size high-entropy alloy nano-enzyme with a specific structure is successfully prepared, the catalase activity, the peroxidase-like activity, the photo-thermal conversion capacity, the active oxygen generation capacity and the tumor targeted killing capacity of the high-entropy alloy nano-enzyme are improved, and technical support is provided for development of the high-performance multifunctional high-entropy alloy nano-enzyme.