37results about How to "Suitable for large-scale preparation" patented technology

The invention relates to the field of blood products, in particular to a preparation method of human activated C1 esterase. The preparation method comprises the following steps: carrying out contact adsorption on cryoprecipitate-removed human plasma and anion exchange resin, washing and eluting to obtain an eluent containing C1 proesterase, carrying out membrane filtration, and carrying out ultrafiltration desalination treatment; adding an anionic substance into the eluent, incubating in vitro to effectively activate the C1 esterase, and filtering by a membrane to obtain a feed liquid containing the activated C1 esterase; and carrying out purification treatment on the feed liquid to obtain the human activated C1 esterase, and carrying out cryopreservation. According to the method, an anion substance is introduced into an eluent system obtained through anion exchange, mild and effective activation of the C1 proesterase is achieved under the condition of not depending on foreign proteolytic enzyme, the risk of non-specific hydrolysis and self-cutting inactivation is remarkably reduced, good synergy is formed with a follow-up purification process, and the method is suitable for industrial production. The human activated C1 esterase product with relatively high activity and good stability is obtained.

The invention discloses a forming method of a magnesium oxide-based carbon dioxide adsorbent suitable for large-scale preparation. The forming method comprises the following steps: calcining a magnesium-containing precursor to prepare porous magnesium oxide raw powder; the preparation method comprises the following steps: carrying out impregnation modification on magnesium oxide raw powder and an alkali metal salt solution to obtain wet mixed thick slurry, drying the slurry, and carrying out secondary calcination to obtain modified adsorbent raw powder; and mixing the raw powder with deionized water, a forming aid and the like to prepare a plastic wet material, and performing extrusion-spheronization balling, drying and calcining to obtain regular spherical adsorbent particles. The formed adsorbent prepared through the method has the advantages of being controllable in particle size, high in mechanical strength, good in adsorptive property after being formed, excellent in cycling stability and the like, can be used for CO2 chemical adsorption trapping of CO2-containing gas under the medium-temperature condition, and is good in CO2 adsorptive property, economical efficiency of the technological method and environmental protection performance, the process technology is easy to amplify, and the method is suitable for industrial production. The method is suitable for industrial large-scale production.

The invention discloses a 13-hydroxyglucopiericidin A heterologous expression engineering strain, a construction method of the 13-hydroxyglucopiericidin A heterologous expression engineering strain and an application of the 13-hydroxyglucopiericidin A heterologous expression engineering strain. According to the engineering strain, Streptomyces avicularis SUKA17 is taken as a host, and heterologous synthesis of the chalicimycin glycoside, especially 13OH-GPA, is realized by introducing a biological synthesis gene cluster of the chalicimycin glycoside; the bacterial strain is classified and named as Streptomyces sp. SK-SA23E, and the preservation number of the bacterial strain is GDMCC NO.67271. The invention further discloses a preparation method of the bacterial strain. According to the invention, the efficient heterologous expression of the biological synthesis gene cluster of the chalcone glycoside is realized for the first time, the yield of the 13OH-GPA in the engineering strain is increased by 2.8 times compared with that of the original production strain, the relative content of the 13OH-GPA in the chalcone glycoside is increased to 48.1% from 23.6%, and the method is suitable for large-scale preparation of the 13OH-GPA.

The invention discloses an NO2 sensor based on an MOF-derived Ni-doped In2O3 core-shell octahedral sensitive material and a preparation method of the NO2 sensor, and belongs to the technical field of semiconductor metal oxide gas sensors. The sensor is composed of a ceramic tube substrate with parallel annular gold electrodes on the surface, an MOF-derived Ni-doped In2O3 core-shell octahedral sensitive material film coated on the surfaces of the electrodes and the substrate, and a nichrome heating coil arranged in the ceramic tube. A core-shell octahedral structure In2O3 nano material with a high specific surface area and abundant pores is constructed by using an MOF template method, and a Ni-doped modulated electronic structure and enhanced surface activity are combined, so that the sensitivity of the sensor to NO2 gas is remarkably improved, the detection lower limit is reduced, the humidity interference is effectively inhibited, and the detection sensitivity of the sensor to NO2 gas is improved. The invention provides a reliable solution for monitoring trace NO2 in a complex environment, and has important practical value and application prospect.

The invention belongs to the technical field of flow batteries, and relates to an electrolyte containing a polyanionic electrolyte additive and a flow battery. Comprising a viologen compound, a supporting electrolyte, a solvent and a polyanionic electrolyte additive, the polyanionic electrolyte additive accounts for 0.1%-20% of the electrolyte in percentage by mass; molecules of the polyanionic electrolyte additive are rich in various functional groups with negative charges, and the polyanionic electrolyte additive is used for interfering the pi-pi accumulation behavior of viologen molecules; the polyanionic electrolyte additive is a polymer containing a repetitive unit, and is sodium polystyrenesulfonate, sodium polyacrylate, poly (2-acrylamido-2-methyl sodium propanesulfonate) or sodium alginate. By introducing a polymer carrying high-density negative charges in the structure or aggregated inorganic anions, multiple regulation and control effects on viologen molecules in a water-phase environment are realized, aggregation behaviors of reduced molecules of the viologen molecules are remarkably inhibited, and chemical and electrochemical stability of the electrolyte is improved.

This invention belongs to the field of wastewater treatment technology, specifically relating to a method for preparing a sponge iron-based ferrous silicate reducing agent for wastewater treatment. Sponge iron is activated in a dilute phosphoric acid solution to obtain activated sponge iron; the activated sponge iron is washed and then immersed in a ferrous solution, removed and washed, and then matured in a sodium silicate solution to obtain matured sponge iron; the matured sponge iron is washed and freeze-dried to obtain the sponge iron-based ferrous silicate reducing agent. The sponge iron-based ferrous silicate reducing agent prepared by this invention is easily separated from the effluent and has excellent and long-lasting reducing performance. It solves the problems of high reducing agent dosage, high salinity of the treated effluent, generation of large amounts of iron sludge, and the need for continuous addition of reducing agent in traditional reduction processes. Furthermore, the preparation method is simple, requiring no complex equipment or catalysts, and the raw material, sponge iron, is inexpensive and widely available, resulting in low production costs and suitability for large-scale preparation and engineering applications.

The invention discloses a zero-dimensional indium-based organic-inorganic hybrid perovskite material and a synthesis method thereof, and belongs to the technical field of photoelectric materials, the perovskite material has a general formula, R is one or more organic cations selected from methylamine, formamidine and cesium, and X is one or more halide ions selected from methylamine, formamidine and cesium; the invention further discloses a synthesis method of the material, the synthesis method comprises the steps of precursor solution preparation, coordination regulation and control, solvothermal reaction, product separation, surface modification, purification and drying, and the crystal structure and the surface chemical environment are precisely regulated and controlled through the synergistic effect of coordination regulation and surface passivation. The photoluminescence quantum yield of the material reaches 82% or above, and the material has excellent luminescence performance in a solution state, has ultrahigh environmental, water and thermal stability, and is lead-free, non-toxic and environment-friendly; the material can be widely applied to the photoelectric fields of light emitting diodes, X-ray scintillators, photocatalysis and the like, and the device performance is excellent.

This invention relates to the field of materials technology, and more particularly to a 3D-printed, internally hollowed-cone solar interface evaporator with directional salt deposition function, its preparation method, and its application. The invention includes step 1: three-dimensional model construction; step 2: substrate surface pretreatment and chemical activation; and step 3: hydrothermal preparation of a Co-Bi-S coating. This invention uses a 3D-printed porous, internally hollowed-cone resin device as a substrate, and grows a Co-Bi-S coating in situ on its surface using a hydrothermal method. This coating exhibits both excellent photothermal conversion performance and corrosion resistance. The evaporator structure is designed as a porous, internally hollowed-cone shape, which provides a larger evaporation area, stronger light capture and focusing capabilities, and can achieve higher evaporation temperatures and directional salt deposition effects. The prepared solar interface evaporator exhibits excellent photothermal conversion performance and water evaporation efficiency, and also demonstrates good structural stability and corrosion resistance. This solves the technical problems of low photothermal conversion efficiency and poor stability in high-salt environments inherent in traditional solar evaporators, making it suitable for applications such as seawater desalination.

The application discloses a kind of FeCoNi nanoparticle loaded yeast-derived carbon composite wave-absorbing materials and preparation method thereof.The method uses yeast as biomass carbon source, and yeast-derived carbon is obtained by hydrothermal carbonization;Then, the three-metal precursor salt (Fe2+, Co2+, Ni2+) is dissolved in the solvent according to a certain mass ratio with yeast-derived carbon, and FeCoNi nanoparticles are in-situ loaded on the surface of yeast-derived carbon by hydrothermal impregnation method, and the composite wave-absorbing material is obtained after drying and inert atmosphere heat treatment.The FeCoNi nanoparticles in the obtained material are uniformly dispersed on the surface of carbon material, and the synergistic effect of dielectric loss and magnetic loss is utilized to achieve excellent electromagnetic wave absorption performance.The method is simple, low in cost, and requires small equipment, and the prepared material is environmentally friendly, sustainable, and has strong controllability, etc., and is suitable for radar stealth field.

The invention is applicable to the technical field of solid waste resource utilization and novel building material preparation, and provides solid waste based lightweight fine-grained ceramsite as well as a preparation method and application thereof, and the ceramsite is prepared from titanium gypsum, iron tailing powder, a solid waste based cementing material, a chelating agent, a nanocrystalline nucleus early strength agent and mixing water according to a specific proportion. The preparation method comprises the following steps: dry mixing of raw materials, preparation of an additive solution, wet mixing, rolling granulation, normal-temperature curing, 60-95 DEG C low-temperature steam curing and drying. According to the invention, the titanium gypsum, the iron tailing powder and other low-value solid wastes are used as main raw materials, and the lightweight fine-grained ceramsite with small particle size, stable structure, low water absorption and low dry density is successfully prepared through an optimized ratio and a unique low-temperature steam curing process. The product can be used as a fine aggregate to be applied to plastering mortar, completely or partially replaces natural gravel, and the mechanical property and construction stability of the mortar are improved while the mortar capacity is reduced.

The application belongs to the technical field of biological nanomaterials, and particularly relates to a nano-enzyme material and a preparation method and application thereof. The application reacts dimethyl imidazole and metal salt in an aqueous solution to obtain a metal-dimethyl imidazole composite material solution, wherein the metal salt comprises copper salt and / or zinc salt; and reacts the metal-dimethyl imidazole composite material solution and tannic acid to obtain a nano-enzyme material. The nano-enzyme material provided by the application has excellent antioxidant enzyme-like catalytic activity and good biocompatibility, can effectively remove abnormally increased reactive oxygen species (ROS) in the process of myocardial infarction and myocardial ischemia-reperfusion injury, inhibit inflammatory response and myocardial cell apoptosis, improve the mitochondrial function state, thereby promoting the repair of damaged myocardial tissue and significantly improving the cardiac function, and provides a new technical solution for the treatment of myocardial infarction and related ischemic cardiovascular diseases.

The invention discloses hollow Silicalite-1 zeolite with controllable mesopores as well as a preparation method and application of the hollow Silicalite-1 zeolite, and the obtained Silicalite-1 zeolite is composed of a mesoporous shell with adjustable pore diameter and a hollow inner cavity. The Silicalite-1 zeolite is provided with a hollow cavity, sufficient space is provided for amine loading, a shell layer is provided with a mesoporous structure with the pore diameter adjustable in the range of 2-20 nm, and amine molecule dispersion and CO2 diffusion efficiency are both considered. The invention further provides a solid amine CO2 adsorbent, high-capacity loading and good dispersity of amine and efficient diffusion of CO2 are synchronously achieved through a composite structure of a hollow cavity and a controllable mesoporous shell layer of a zeolite carrier, and the tradeoff limitation of a traditional carrier between mass transfer and loading is broken through. The adsorbent can be used for capturing CO2 in medium and low temperature flue gas. According to the invention, the problems of poor amine dispersibility, large CO2 diffusion resistance, low adsorption capacity, easy inactivation and the like caused by narrow pore channels of the zeolite carrier of the existing solid amine adsorbent are solved.

The invention discloses a high-capacity long-cycle lanthanum-doped sodium vanadium phosphate positive electrode material and a preparation method thereof, relates to the technical field of sodium ion batteries, and aims to solve the problem that an existing NVP material is difficult to have high capacity and structural stability at the same time. The technical key points of the invention are as follows: the high-capacity long-cycle lanthanum-doped sodium vanadium phosphate positive electrode material is provided, the high-capacity long-cycle lanthanum-doped sodium vanadium phosphate positive electrode material contains an NVP type material with a composition formula (I) and Na < 3 + x > V < 2-y > Lay (PO4) 3 / C (I), x and y meet the following formula, x is more than 0 and less than or equal to 0.5, y is more than or equal to 0.01 and less than or equal to 0.06, and C is an amorphous carbon layer which is formed by in-situ carbonization and uniformly coats the surfaces of material particles. The rare earth La element is introduced to dope the V site, crystal lattices are expanded, a wider channel is provided for de-intercalation of sodium ions, meanwhile, La doping is beneficial to stabilization of the crystal structure, and the transmission behavior of the sodium ions is optimized; on the basis of inheriting the advantage of ultrahigh capacity of a sodium-rich strategy, the cycling stability of the material is remarkably improved.

The application discloses a metal-loaded vertical array light lanthanum fluoride-based nanosheet catalytic membrane and a preparation method, and belongs to the technical field of catalytic membrane materials. The catalytic membrane comprises a base film, a light lanthanum fluoride-based nanosheet array in-situ vertically grown on the surface of the base film, and metal active species loaded in pores. The catalytic membrane prepared by the application has a uniform distribution and a topological structure nanosheet vertical light lanthanum fluoride-based nanosheet array layer grown on the surface, and simultaneously loads metal active species catalysts in the array layer. The catalytic membrane exhibits high catalytic activity and stability in the field of heterogeneous Fenton catalysis, photocatalysis, and photo-Fenton synergistic catalytic degradation of organic pollutants in water bodies, and the catalytic membrane is easy to separate from wastewater and can be recycled.

The invention discloses a preparation method and application of a cobalt phosphide electrocatalyst with an adjustable interface water-hydrogen bond network, and belongs to the field of electrocatalytic materials. Cobalt nitrate, variable valence metal chlorine salt and urea are used as raw materials to synthesize a hydroxide precursor, and after simple low-temperature phosphating reaction treatment, in-situ oxidation reconstruction is carried out in the water electrolysis oxygen evolution reaction process to prepare the cobalt hydroxide. The preparation method disclosed by the invention has the advantages of simplicity in operation, high efficiency, environmental friendliness, strong controllability, low cost and the like; and the prepared cobalt phosphide oxygen evolution electrocatalyst has the advantages of adjustability of an interface water-hydrogen bond network, high stability, excellent oxygen evolution activity and the like.

The application provides a Ti3C2T x Ag composite particle reinforced copper-based self-lubricating material and a preparation method thereof, and relates to the technical field of metal matrix composite materials. The method comprises the following steps: etching Ti3AlC2 powder to obtain multilayer Ti3C2T x particles; then, silver particles are plated on the surfaces of the Ti3C2T x particles by a chemical plating process to obtain Ti3C2T x Ag composite particles; and finally, the composite particles are mixed with copper-based powder, and the mixture is formed and sintered by a powder metallurgy process to obtain Ti3C2T x Ag composite particle reinforced copper-based self-lubricating material. The application solves the problems of easy agglomeration of Ti3C2T x and silver particles in the matrix and uneven dispersion by constructing a core-shell structure of the reinforcing phase, realizes lubrication synergy of the two at different temperatures, and has the advantages of simple operation, economy, good repeatability, excellent tribological performance of the prepared material, and widened application of copper-based composite materials.

The invention belongs to the technical field of protein extraction, and particularly relates to an extraction method of AQP4 protein. 4% OGP is adopted for mild dissolution, 5% glycerin is used for antigen protection, the activity retention rate is larger than or equal to 85%, the activity retention rate is only about 50% due to denaturation of a glycine acid eluent in an immunoprecipitation method, and the method is more suitable for functional and immune experiments. The method is a high immunocompetence extraction method aiming at AQP4, the purity of the purified AQP4 is larger than or equal to 80%, the autoimmunocompetence of the antigen is sufficiently reserved, and the requirements of structural analysis, functional experiments and reagent development are met. The method is low in cost, high in efficiency, low in equipment dependence degree and suitable for large-scale preparation, and high-valence antibodies are prevented from being used, and an ultra-speed centrifuge is not needed.

The invention discloses a composite separation membrane and a preparation method and application thereof.The composite separation membrane comprises a porous substrate and a composite membrane layer attached to at least one face of the porous substrate, and the composite membrane layer is a GO-PEI composite membrane layer formed by compounding graphene oxide and branched polyethyleneimine; and the GO-PEI composite film layer is of a single-layer or multi-layer structure formed by layer-by-layer overlapping. The composite separation membrane has an ultrathin structure, good mechanical stability and an adjustable transmission channel, can give consideration to permeability and selectivity, and can adapt to various application scenes such as gas separation, seawater filtration / purification, seawater quality detection and the like; meanwhile, a corresponding membrane assembly and device are provided, and engineering use and detection coupling are facilitated.

This invention relates to the field of pharmaceutical and chemical intermediates technology, and discloses a novel class of substituted phenylethyl-O-β-D-glucuronide compounds. These compounds are generated using substituted phenylethanol as a substrate and 1-fluoro-D-glucuronic acid as a glycosyl donor, catalyzed by β-glucuronyltransferase derived from *E. coli*. The process yield can reach over 95%, and the reaction conditions are mild and environmentally friendly. Substituted phenylethyl-O-β-D-glucuronide can be efficiently used for the determination of β-glucuronidase activity, and its applications are wide-ranging and reliable. The product can meet the needs of pharmaceutical, food, and other fields for β-glucuronidase activity control. It can be used for enzyme activity detection in the auxiliary diagnosis of clinical diseases, and also for enzyme quality control in fruit juice clarification processes in the food industry, drug precursor activation, and glycan structure analysis in the biopharmaceutical field. The product structure has been verified to be accurate by mass spectrometry and 1H NMR spectroscopy, and enzymatic hydrolysis experiments have confirmed its reliable application.

This invention belongs to the field of compound preparation technology and discloses a method for preparing cyclic ether compounds containing an indanone structure. The method includes the following steps: using an indanedione diazo compound and a cyclic ether compound as raw materials, and under the action of a copper salt catalyst and in an argon atmosphere, a heated reaction is carried out to synthesize the cyclic ether compound containing an indanone structure shown in Formula II. This invention uses a copper salt as a catalyst, specifically copper carbene inserting into the diazo compound to form an oxonium ylide, which then undergoes a ring-expansion reaction with the cyclic ether, resulting in the efficient synthesis of cyclic ether compounds containing an indanone structure with high product yield.

This invention relates to a high-capacity Mg-RE(Sm,Nd)-Ca-Cu-Zn hydrogen storage composite material catalyzed by K2TiF6+Nb2O5, belonging to the field of solid-state hydrogen storage materials technology. It solves one of the problems of existing magnesium-based hydrogen storage materials, namely, high thermodynamic stability, complex activation process, high hydrogen desorption temperature, and slow hydrogen absorption / desorption kinetics. This invention discloses a Mg-based solid-state composite hydrogen storage material, the composition of which is: Mg... 95‑x‑y Sm x Nd y Ca2Cu 3‑z Zn z +m wt.%(K2TiF6+Nb2O5), where x, y, and z are atomic ratios, and 0.5≤x≤2, 0.5≤y≤2, 0.2≤z≤3, m is the percentage of K2TiF6+Nb2O5 in the alloy, 4≤m≤10, the mass ratio of K2TiF6 to Nb2O5 is 1:1, the preferred atomic ratio is 1.5:1.5:0.8, m=6. This high-capacity Mg-RE(Sm,Nd)-Ca-Cu-Zn-based solid hydrogen storage composite material has high hydrogen absorption and desorption capacity and excellent hydrogen absorption and desorption kinetics; moreover, the preparation process is simple and easy to operate, suitable for large-scale preparation, and can be used as a hydrogen storage / hydrogen supply carrier in various scenarios.

The present application relates to the technical field of hydrogen evolution by water electrolysis, and particularly relates to a bimetallic@vacancy type ZIF-8 composite material, a preparation method and application. The bimetallic@vacancy type ZIF-8 composite material comprises vacancy type ZIF-8 and Ru and Pt atomic level active sites anchored on the surface of the vacancy type ZIF-8, the Ru and Pt are dispersed on the surface of the vacancy type ZIF-8 in the form of single atoms or double-atom near neighbors, and no metal crystal phase is formed. The present application utilizes the precise anchoring and spatial confinement effect of the metal coordination unsaturated vacancy on the vacancy type ZIF-8 on the Ru atoms and Pt atoms, so that the Ru sites and Pt sites are distributed in near-neighbor distribution on the atomic scale and form an interface electronic coupling effect, thereby simultaneously breaking through the kinetic bottleneck that a single metal site is difficult to consider water dissociation and hydrogen desorption, and solving the technical problems of low utilization rate of noble metal atoms, insufficient activity of single metal catalyst and slow alkaline HER kinetics in the prior art.

The invention discloses a high-frequency surface acoustic wave dimethyl methylphosphonate sensor and a preparation method thereof, and belongs to the technical field of gas sensors. The sensor comprises a piezoelectric substrate, an interdigital transducer arranged on the piezoelectric substrate and a gas sensitive layer formed on the surface of the interdigital transducer, the gas sensitive layer comprises a 11-mercaptoundecanoic acid material layer formed on the surface of the interdigital transducer and a zirconium-based MOF material layer formed on the 11-mercaptoundecanoic acid material layer. The invention also provides a preparation method of the sensor. The 11-mercaptoundecanoic acid and the zirconium-based MOF material layer are modified on the surface of a high-frequency surface acoustic wave device layer by layer through a molecular self-assembly technology. The sensor disclosed by the invention has high sensitivity, quick response and good repeatability on dimethyl methylphosphonate gas, is simple in preparation process and good in repeatability, and has important application value in the field of gas sensing.

The invention discloses a preparation method of a doped and wrapped film structure, and belongs to the technical field of film preparation. Comprising the following steps: S1, cleaning a substrate material and feeding the substrate material into a sputtering chamber; s2, taking a ZnS target and a ZnO target as sputtering target materials, and sequentially carrying out the following coating steps on the substrate by using magnetron sputtering equipment: (a) vacuumizing a sputtering chamber to 1.0 * 10 <-4 > Pa, and introducing argon to carry out pre-sputtering; (b) sputtering to form a first ZnS layer; (c) sputtering to form a ZnO layer; (d) performing co-sputtering of ZnS and ZnO to form a co-doped layer; (e) sputtering to form a second ZnS layer; and S3, placing the coated sample in an oxygen atmosphere, and carrying out high-temperature annealing treatment to obtain the doped and wrapped film structure. The preparation method is simple and controllable in preparation process, good in stability and suitable for the window layer of the efficient thin-film solar cell.

The invention discloses a carbon quantum dot / starch grafted acrylic acid composite material as well as a preparation method and application thereof. The composite material takes a three-dimensional polymer network structure as a main body, wherein the three-dimensional polymer network structure is formed by taking starch as a main chain and taking polyacrylic acid as a grafted side chain; the three-dimensional polymer network structure is constructed through free radical graft copolymerization reaction of starch and acrylic acid under the action of an initiator and a cross-linking agent, and the carbon quantum dots are fixed in the three-dimensional polymer network structure in the copolymerization reaction process. The surface of the composite material is rich in hydrophilic functional groups such as-COOH and-COONa, the composite material has excellent adsorption removal capacity on heavy metal ions such as Pb < 2 + >, Cu < 2 + > and Ni < 2 + >, high-sensitivity fluorescence detection on the heavy metal ions can be achieved through the fluorescence quenching effect of the carbon quantum dots, and the adsorption process is completed while specific metal ions are detected.

The application belongs to the technical field of nanomaterials and lubrication, and discloses a hydrophobic modified graphene quantum dot, a preparation method thereof and application of the graphene quantum dot in lubricating oil, and the preparation method comprises the following steps: (1) using citric acid as a carbon source, hydrophilic GQDs are prepared by a pyrolysis method; (2) using o-xylene as a solvent and lauric acid as a modification reagent, the hydrophilic GQDs are subjected to hydrophobic modification, and then the hydrophobic modified graphene quantum dot is obtained by low-temperature precipitation, centrifugation and purification, and can be applied in lubricating oil. The application solves the problems that traditional GQDs are prone to agglomeration, have poor dispersibility and limited lubricating effect in non-polar lubricating oil, and the prepared hydrophobic graphene quantum dot has excellent friction-reducing and wear-resisting synergistic effect, can form a continuous and uniform protective layer rich in carbon and oxygen at a friction interface, can simultaneously reduce a friction coefficient and a wear volume, the lowest friction coefficient is 0.063, the wear volume is reduced by 90.84%, and the comprehensive lubricating performance is outstanding.

The present invention discloses a multi-walled carbon nanotube-supported high-entropy alloy catalyst, its preparation method and application. The high-entropy alloy catalyst consists of a multi-walled carbon nanotube support and high-entropy alloy nanoparticles supported on the surface of the multi-walled carbon nanotube support. The high-entropy alloy nanoparticles are composed of five metal elements, namely Fe, Co, Ni, Pt, and In, to form a thermodynamically stable FeCoNiPtIn high-entropy alloy solid solution phase. The high-entropy alloy nanoparticles are anchored on the surface of the support through chemical bonding and have a delocalized electron structure formed by d-p / d-d / sp hybridization. The catalyst prepared according to the method of the present invention exhibits excellent activity and durability in the hydrogen evolution reaction, can achieve long-term stable operation, and provides a reliable and efficient preparation technology solution with excellent performance for the large-scale industrial promotion of the electrolytic water hydrogen evolution reaction.

The present application relates to the field of adsorption materials, and discloses a hierarchical pore MOFs-based composite phase change material, a preparation method and application thereof.The MOFs-based composite phase change material comprises a hierarchical pore MOFs material having micropores, mesopores and macropores simultaneously, and a phase change material loaded in the macropore channels of the hierarchical pore MOFs material.The hierarchical pore MOFs-based composite phase change material prepared by the present application has a higher specific surface area and pore volume, and has a certain number of micropores, mesopores and macropores respectively, and the functions of the pore channels of different sizes are fully developed.In the process of adsorbing VOCs in micropores, the mesopores are beneficial to the mass transfer of rapid adsorption of the adsorbate, the adsorption rate is improved, and the phase change material in the macropores can store adsorption heat to inhibit the bed temperature rise and improve the bed adsorption efficiency.

This invention relates to a bis(naphthalimide)-based blue dye, its preparation method, and an electrowetting display ink. The dye has the following structural formula: it comprises two naphthalimide units, each containing one aromatic amine group and two straight-chain or branched alkyl groups, bridged by a diamine. The preparation method uses dibromonaphthalimide as an intermediate, which undergoes nucleophilic substitution reactions with the diamine and aromatic amine, respectively, to obtain the dye. The preparation method of the bis(naphthalimide)-based blue dye provided by this invention is simple in procedure, has mild reaction conditions, and is suitable for large-scale preparation.

This invention discloses a method for preparing a cobalt phosphide electrocatalyst with a tunable interfacial water hydrogen bond network and its application, belonging to the field of electrocatalytic materials. The invention uses cobalt nitrate, variable-valence metal chloride salts, and urea as raw materials to synthesize a hydroxide precursor, which is then subjected to a simple low-temperature phosphating reaction followed by in-situ oxidation and reconstruction during the oxygen evolution reaction of water electrolysis. The preparation method of this invention has advantages such as simple operation, high efficiency, environmental friendliness, strong controllability, and low cost. The prepared cobalt phosphide oxygen evolution electrocatalyst possesses advantages such as a tunable interfacial water hydrogen bond network, high stability, and excellent oxygen evolution activity.