95 results about "Copper nanowires" patented technology

The invention relates to a copper-based composite catalyst and a preparation method and application thereof.The copper-based composite catalyst comprises an inner core and a shell wrapping the surface of the inner core, the inner core comprises copper nanowires, and the shell comprises hydroxyl aluminum oxide. According to the copper-based composite catalyst provided by the invention, the surface of the copper nanowire inner core is coated with the aluminum hydroxide shell, and the aluminum hydroxide in the shell and the copper nanowire in the inner core construct a copper-oxygen-aluminum metal interface site on the surface of the inner core through the lewis acid-alkali interaction, so that the migration energy of the surface of copper atoms can be improved; the copper species in the inner core are stabilized, the reconstruction of the copper-based catalyst is avoided, and the selectivity and the stability of the copper-based composite catalyst are improved.

The invention discloses a layered nano-porous copper loaded cuprous oxide / copper oxide nanowire composite material as well as a preparation method and application thereof. The material is a thin strip and comprises an amorphous substrate thin strip, multiple layers of nano-porous copper covering an amorphous substrate and a cuprous oxide / copper oxide two-component heterojunction nanowire loaded on the surface of the nano-porous copper. The preparation method comprises the following steps: firstly, freely dealloying an amorphous ribbon, and adding PVP (Polyvinyl Pyrrolidone) into dealloying corrosive liquid to generate layered nano-porous copper; then, copper hydroxide nanowires grow on the surface of each layer of nano-porous copper in situ through the anodic oxidation technology; and finally, converting the copper hydroxide into cuprous oxide / copper oxide nanowires with different component proportions by regulating and controlling the temperature by adopting a heat treatment process. The prepared composite material has a larger specific surface area and more active sites, and has unique structure and performance advantages in the field of photocatalytic degradation of organic dyes.

The invention belongs to the technical field of composite films, and particularly relates to a super-soft, electricity-conducting and heat-conducting film electrode and a preparation method thereof. The preparation method comprises the following main preparation steps: firstly, preparing a single-layer boron nitride nanosheet BNNS from a two-dimensional heat conduction material hexagonal boron nitride BN through an ultrasonic stripping technology, and then carrying out hydroxylation treatment on the BNNS to form a hydroxylated boron nitride nanosheet HO-BNNS; the preparation method comprises the following steps: mixing a HO-BNNS aqueous solution with a silver nanowire (AgNWs) or copper nanowire (CuNWs) aqueous solution, mixing with a polyvinyl alcohol (PVA) polymer substrate material to form a uniform dispersion liquid, pouring the mixed solution on the surface of a prefabricated metal nanowire thin film electrode (a substrate can be a flat substrate such as a PET flexible polymer or a silicon wafer rigid substrate), and performing high-temperature curing to obtain the metal nanowire thin film electrode. And finally, the cured film is peeled off from the substrate, so that the super-soft film electrode with excellent electric conduction and heat conduction performance is prepared, and the film can be repeatedly folded and has super-flexibility.

The present invention relates to the technical field of nanowire electromagnetic shielding film preparation, and discloses a composite nanowire staggered interconnected electromagnetic shielding film and a preparation process. The S coordinating atoms in a cationic coordination monomer form Cu-S coordination bonds with nano-copper wires, which are adsorbed on the surface of the nano-copper wires to obtain positively charged copper nanowires. The S coordinating atoms in an anionic coordination monomer form Ag-S coordination bonds with nano-silver wires, which are adsorbed on the surface of the nano-silver wires to obtain negatively charged silver nanowires. The amount of positively charged substances on the copper nanowires is greater than the amount of negatively charged substances on the silver nanowires. The silver nanowires and nano-copper wires are electrostatically self-assembled by electrostatic adsorption force to obtain positively charged silver-copper composite nanowires with a staggered interconnected distribution. The silver nanowires are spontaneously deposited on a negatively charged flexible substrate under the action of electrostatic adsorption to obtain a composite nanowire staggered interconnected electromagnetic shielding film. The electromagnetic shielding film exhibits excellent photoelectric properties.

The present invention relates to the technical field of electrochemical energy materials, and specifically discloses a molybdenum nitride / nickel cobalt nitride nanosheet heterostructure electrocatalytic material, its preparation method and application. The method comprises S1, preparing copper hydroxide nanowires loaded on copper foam; S2, preparing copper nanowires loaded on copper foam; S3, preparing copper nanowire-loaded molybdenum-doped nickel cobalt nanosheets; S4, placing the copper nanowire-loaded molybdenum-doped nickel cobalt nanosheets in a tube furnace, and nitriding them in an ammonia nitrogen atmosphere to obtain a molybdenum nitride / nickel cobalt nitride nanosheet heterostructure electrocatalytic material. The internal resistance of the material is reduced by electron transfer and heterostructure between molybdenum nitride and nickel cobalt nitride, and compared with precious metal platinum wire, the material has excellent high current density hydrogen evolution performance. The preparation method provided by the present invention has the advantages of simple synthesis process, short synthesis cycle and low production cost. In addition, no hydrothermal reaction is required during preparation, the material has high safety and reliable repeatability, and is very suitable for large-scale industrial production.

The application discloses a copper-bismuth bimetallic catalyst and a preparation method and application thereof. The copper-bismuth bimetallic catalyst comprises a copper substrate and copper-bismuth nanowires grown on the copper substrate, the copper-bismuth nanowires comprise copper nanowires and a metal bismuth layer loaded on the copper nanowires, and the mass fraction of bismuth in the copper-bismuth nanowires is 40% to 60%. The preparation method of the catalyst comprises the following steps: after in-situ growth of copper hydroxide nanowires on the copper substrate, the copper-bismuth bimetallic catalyst is prepared through heat treatment, electrochemical reduction treatment and bismuth deposition. Meanwhile, the copper-bismuth bimetallic catalyst can not only make full use of the copper and bismuth bimetallic effect, effectively improve the activity, stability and selectivity of electrocatalytic reduction of carbon dioxide, but also has the advantages of simple and controllable preparation, wide application potential window and wide application environment.

This invention discloses a method for preparing a three-dimensional integrated lumbar support cushion. The raw materials of the lumbar support cushion include: ethylene-vinyl acetate copolymer, polyether-type thermoplastic polyurethane elastomer, physically foamed microspheres, azodicarbonamide, caprolactam-blocked 4,4'-diphenylmethane diisocyanate, surface-modified copper nanowires, and silver-loaded silicone composite components. The preparation process is as follows: the matrix resin and modified copper nanowires are melt-blended at high temperature, and then mixed with the foaming system, crosslinking agent, and composite components at low temperature to obtain a blended base material; the blended base material is injection molded, followed by static differential temperature field for pressure holding and curing, and finally cooled and demolded. This invention utilizes copper nanowires to construct a thermally conductive network, which, combined with the external temperature difference, forms a continuous foaming ratio and crosslinking density gradient inside, eliminating the physical phase interface of traditional multi-material splicing, significantly improving the tear resistance and fatigue life of the transition zone; and utilizes cooling phase separation to form an anti-slip and antibacterial skin layer.

The invention provides a plasmon copper-based nano material, a preparation method thereof and application of the plasmon copper-based nano material in a carbon dioxide capture-conversion system.The preparation method comprises the steps that a copper nanowire modified by polytetrafluoroethylene is adopted as a plasmon catalyst, carbon dioxide is efficiently adsorbed and captured through organic amine, and under excitation of polarized light with the specific wavelength, the carbon dioxide is converted into the plasmon copper-based nano material. And efficient carbon dioxide electroreduction is realized. Compared with the prior art, carbon dioxide capture and photoelectrocatalysis carbon dioxide conversion of the plasmon copper-based nano material are combined, rapid capture and release of carbon dioxide are achieved, and the Faraday efficiency of reducing carbon dioxide into methane reaches up to 90% or above. The invention constructs a carbon dioxide capture-conversion system with industrial application potential, and provides a new path for realizing energy conservation and emission reduction.

The application discloses a copper oxide nanowire loaded silver monatomic catalyst, a preparation method and application thereof, and comprises a substrate, CuO nanowires and metal Ag monatomic atoms loaded on a CuO nanowire electrode layer; the substrate is a commercial copper foam, and the substrate is used for providing a copper source and preparing an array material of the metal Ag monatomic atoms on the CuO nanowires. The application adopts the above-mentioned copper oxide nanowire loaded silver monatomic catalyst, the preparation method and the application thereof, through silver monatomic atom modification, copper-silver metal interaction jointly regulates an intermediate product in an adsorption electrocatalytic reduction process, excellent electrocatalytic nitrophenol reduction performance is obtained, and the application is suitable for environmental pollution treatment and pharmaceutical synthesis development fields.

This invention provides a method for producing copper nanowires that exhibits excellent selectivity and can be implemented with a simple configuration. [Solution] A method for producing copper nanowires, comprising the following step 1. Step 1: A mixture containing copper oxide (a), halogen ions (b), a nonionic polymer compound (c), alkyl quaternary ammonium ions (d), a reducing agent (e), and water (f) is heated to 50°C or higher to precipitate copper nanowires.

This invention relates to the field of nanomaterial preparation, specifically disclosing a method for preparing copper nanowires, comprising the following steps: (a) dissolving copper chloride dihydrate in deionized water; (b) adding glucose, sodium borohydride, and hexadecylamine, mixing for a period of time until a sky-blue suspension is obtained; (c) reacting at a certain temperature for a period of time; cooling to room temperature, and washing to obtain the copper nanowires. This invention also discloses the copper nanowires.

The invention discloses a preparation method of a high-conductivity multivalent nanowire and application of the high-conductivity multivalent nanowire to a non-enzyme glucose sensor. The copper nanowire with a high length-diameter ratio is prepared, a certain amount of thiourea is directly added into an ethanol solution of the copper nanowire, and conversion from the copper nanowire to the high-conductivity multivalent nanowire can be achieved under the condition of a specific reaction temperature. In the conversion process, the surface of the nanowire is synchronously induced to form a coarse structure, non-single valence copper sulfide active sites are constructed, and the formed synergistic effect can remarkably increase the number of the active sites, reduce an electrocatalytic oxidation reaction energy barrier and strengthen the specific adsorption capacity of glucose molecules, so that the non-enzyme glucose sensor is manufactured. The sensor shows ultrahigh detection sensitivity, ultralow response speed and excellent anti-interference performance, the preparation process is extremely simple, the cost is low, and the sensor has remarkable technical advantages and wide application prospects in the field of quantitative detection of glucose.

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 invention provides a silver-coated copper nanowire, a preparation method thereof and a conductive material, and the preparation method comprises the following steps: mixing a copper salt solution, a first reducing agent and a surfactant, carrying out a heating reaction to obtain a copper nanowire solution, and carrying out first centrifugal sedimentation treatment on the copper nanowire solution to obtain a copper nanowire; the copper nanowires are dispersed in a PVP aqueous solution, CTAB is added, stirring is performed to obtain a PVP-CTAB dispersed copper nanowire solution, and the PVP-CTAB dispersed copper nanowire solution is mixed with a second reducing agent to obtain a copper nanowire plating solution; and mixing the silver precursor solution with the copper nanowire plating solution for reaction, and carrying out second centrifugal sedimentation treatment to obtain the silver-coated copper nanowire.

The application discloses a kind of three-dimensional ordered hollow cuprous oxide nano array and its preparation method and application, it is related to photoelectric detection technical field.Preparation method includes: impurity aluminum is oxidized, and the aluminum oxide template with the hole formed on surface is obtained, and after reaming, the three-dimensional porous aluminum oxide template with back aluminum is obtained;With three-dimensional porous aluminum oxide template as cathode, graphite is anode, in Cu electrodeposition liquid, constant current electrodeposition is carried out, and the three-dimensional porous aluminum oxide template with back aluminum loaded with copper nanowire is obtained;Three-dimensional porous aluminum oxide template with back aluminum is removed using alkali solution, and three-dimensional interconnected self-supporting copper nanowire array is obtained;Three-dimensional interconnected self-supporting copper nanowire array is annealed under local hypoxia environment, and three-dimensional highly ordered hollow cuprous oxide nano array is obtained by cooling down.The self-powered photoelectrochemical type photoelectric detector prepared by using the hollow cuprous oxide nano array has high light absorption rate, high specific surface area and high ion transmission rate, and is suitable for ultraviolet light detection.

A conductive paste composition according to the present disclosure contains silver-coated copper nanowires with a core-shell structure; a binder mixture containing a silicone resin binder and a hydrocarbon-based resin binder; and an organic solvent, such that the conductive paste composition has a low sheet resistance and may withstand a high temperature, thereby implementing excellent conductivity and electromagnetic wave shielding properties. Furthermore, the conductive paste may be widely used in various fields such as electromagnetic wave shielding, solar cell electrodes, electronic circuits, and antennas.

The invention relates to the technical field of flexible transparent electrode preparation and application, in particular to a copper nanowire ionic liquid flexible transparent electrode and a preparation method and application thereof. The preparation method comprises the following steps: assembling copper nanowires into a uniform and continuous thin film on a gas / liquid interface, carrying out transfer and conductivity improvement treatment, immersing the copper nanowire thin film into an ionic liquid solution, and drying to obtain the copper nanowire ionic liquid flexible transparent electrode with oxidation resistance. The flexible transparent electrode prepared by the invention has high mechanical and chemical stability, overcomes the key problem that a copper nanowire flexible transparent electrode is easy to oxidize and loses conductivity, is low in preparation cost, high in transparency and good in flexibility, and can be applied to the related fields of wearable electronic equipment, flexible touch screens, solar cells, intelligent windows and the like.

A method for controllable stepwise reduction of electrocatalytic unsaturated nitro compounds with potential regulation belongs to the field of organic electrocatalysis. In a three-electrode system, an electro-reduced copper nanowire catalyst (ER-Cu / CF) grown on copper foam is used as the cathode, a platinum sheet is used as the counter electrode, and an Ag / AgCl electrode is used as the reference electrode. The two poles of the electrolytic cell are separated by a nafion membrane to form an electrocatalytic reactor. In a neutral electrolyte containing nitro compounds, by adjusting the low direct current voltage, the electrocatalytic unsaturated nitro compounds are controllably stepwise reduced to obtain hydroxylamine intermediates, amino products, and fully reduced products with high selectivity and high yield. In the present invention, the selectivity and yield of the products are very high, it can be carried out at normal temperature and pressure, the operation is simple, green and safe, and the reaction controllability is high; it avoids problems such as low yield, poor selectivity, use of noble metal catalysts and toxic reagents, environmental pollution, and the need for high reaction temperature and pressure in other methods.

The invention belongs to the technical field of electronic paste, and discloses low-temperature-coefficient resistance paste for a potentiometer and a preparation method of the low-temperature-coefficient resistance paste. The resistance paste is composed of a conductive phase, a glass phase and an organic carrier, the conductive phase is bismuth ruthenate nanowires and carbon-coated copper nanowires, the glass phase comprises Bi2O3, B2O3, SiO2 and La2O3, and the organic carrier is composed of ethyl cellulose and terpilenol. The preparation method comprises the following steps: respectively preparing the components, mixing in proportion, and rolling by a three-roller mill. The TCR value of a resistive layer formed by the paste is controlled to be + / -50 ppm / DEG C, the resistance change is lower than 0.8% after 1000 times of-55-125 DEG C cold and hot cycles, low-temperature sintering can be achieved, the silver migration resistance is excellent, the high-frequency insertion loss of the 3GHz frequency band is low, the sheet resistance uniformity is good, and the paste is suitable for the miniaturization, high precision and high-frequency scene requirements of high-end potentiometers.

This application provides an electromagnetic shielding nanofiber composite membrane and its preparation method, belonging to the field of electromagnetic shielding material preparation technology. The electromagnetic shielding nanofiber composite membrane provided in this application includes a three-dimensional framework substrate, and conductive and magnetic media uniformly dispersed in the three-dimensional framework substrate. The substrate and the conductive and magnetic media form a special three-dimensional network porous structure through overlap and adsorption. The composite membrane provided in this application has a thickness of 20-30 μm, an electromagnetic shielding effectiveness of 59 dB, and a maximum tensile stress of 12 MPa. The preparation method of this composite membrane is as follows: carboxylated carbon nanotubes, copper nanowires, and nickel ferrite are uniformly loaded into PVA-co-PE nanofibers through vacuum-assisted filtration, cross-linking, and hot pressing processes. The membrane can be formed in a single filtration step. The preparation method is simple and has good repeatability.

The invention relates to a catalyst for hydrogen production through seawater electrolysis based on a metal ruthenium-doped copper nanowire composite structure and a synthesis method thereof, and belongs to the technical field of catalysis, the catalyst is composed of a copper nanowire skeleton derived from foamy copper and metal ruthenium clusters uniformly distributed on the surface of the copper nanowire skeleton; the method comprises the following steps: placing foamy copper in a solution containing sodium hydroxide and an oxidizing agent to generate a copper hydroxide nanowire; metal ruthenium is introduced by dipping in a solution containing ruthenium salt; and carrying out inert atmosphere heat treatment and electrochemical reduction to obtain the ruthenium-cluster-loaded copper nanowire composite catalyst. The fine regulation and control of the structure and components of the catalyst are realized by adjusting the concentration of the reaction solution, the dipping time and the treatment conditions. The electrocatalyst shows excellent hydrogen evolution activity and long-term stability under the acidic seawater electrolysis condition, the problems that a nickel-based current collector is prone to corrosion in an acidic medium and a traditional platinum-based catalyst is prone to inactivation in natural seawater are effectively solved, and a new technical scheme is provided for efficient and stable seawater electrolysis hydrogen production.

The invention provides a flexible composite sodium metal negative electrode and a preparation method thereof, a sodium ion battery and electric equipment, and relates to the field of sodium ion batteries. The method comprises the following steps: carrying out acid leaching on a metal framework to obtain a treated framework; carrying out first mixing on the treated framework and first alkali liquor, and electrifying to obtain a framework coated with copper hydroxide; sequentially carrying out annealing treatment and heat treatment on the copper hydroxide coated framework under reducing gas to obtain a copper nanowire coated metal framework; carrying out second mixing and reaction on the copper nanowire coated metal framework, tartaric acid, bismuth nitrate and water, and then cleaning by adopting second alkali liquor and water to obtain a bismuth modified sodium-philic three-dimensional metal framework; and injecting the bismuth-modified sodium-philic three-dimensional metal skeleton into molten sodium metal or electrochemically depositing the sodium metal to obtain the flexible composite sodium metal negative electrode. The method has the advantages of being wide in raw material source, simple to operate, good in repeatability, low in cost, beneficial to large-scale production and the like, and has the possibility of practical application.

The present application relates to the technical field of magnesium deposition hydrogen storage material production, and specifically to an intelligent production process for magnesium deposition hydrogen storage material, the process comprising: ultrasonically cleaning a porous copper mesh; injecting precious metal ions into the porous copper mesh; preparing copper oxide nanowires at high temperature; obtaining temperature field data at each acquisition moment during the high-temperature oxidation process of the copper oxide nanowires; determining a temperature adjustment coefficient based on the uniformity and stability of the distribution between different temperature data in the temperature field; adjusting the temperature during the high-temperature oxidation process of the copper oxide nanowires according to the real-time temperature adjustment coefficient; oxidizing titanium oxide-coated copper oxide nanowires; and depositing magnesium on the nanowires to obtain magnesium deposition hydrogen storage materials. The present application aims to solve the problem of poor growth quality of copper oxide nanowires due to excessively high or low high-temperature oxidation temperatures, improve the quality of the prepared materials, and thereby obtain magnesium deposition hydrogen storage materials with better hydrogen storage performance.

The invention discloses a vertical copper nanowire and a preparation method and application thereof, and belongs to the technical field of copper nanowire materials and preparation thereof. The method solves the problem that the copper nano array prepared by the existing method is easy to agglomerate. According to the preparation method disclosed by the invention, vertical growth, high dispersion, zigzag surface appearance and twin crystal structure formation of the copper nanowires are realized by accurately controlling electrodeposition conditions and template design in combination with a key freeze-drying post-treatment process, the active area and appearance orderliness of the copper nanowires are remarkably improved, and the preparation method is suitable for industrial production. Abundant active sites are provided for adsorption and reduction of nitrate radicals, so that the performance of the composite material in application such as electro-catalysis is remarkably improved.

The invention belongs to the technical field of wearable equipment, and discloses an ANF fibrous phase change material with a coaxial three-layer structure and a preparation method thereof.The preparation method comprises the steps that calcium sulfate nanowire / ANF mixed liquid and silver nanowire / graphene dispersion liquid or copper nanowire / graphene dispersion liquid are subjected to coaxial wet spinning extrusion treatment in a formic acid solution; the preparation method comprises the following steps: adding an ANF fibrous phase-change material into a reaction kettle, freezing, freeze-drying, and impregnating by using a predetermined phase-change material to obtain the ANF fibrous phase-change material with a coaxial three-layer structure; the ANF / calcium sulfate nanowire is used as an outer layer to provide mechanical protection and a flexible matrix for the ANF fibrous phase change material; silver nanowire / graphene or copper nanowire / graphene is used as a middle layer, a heat conduction channel is provided for heat transfer, and the liquefied phase change material is prevented from being migrated outwards; the phase-change material of the core layer effectively stores heat of an energy storage environment through a phase-change reaction and performs a charge-discharge reaction, and has the advantages of long cycle life and high energy storage.

The invention discloses a negative electrode material based on a graphite lithium ion battery and a preparation method of the negative electrode material, and relates to the technical field of battery negative electrode materials. The preparation method comprises the following steps: by taking a copper nanowire as a substrate, preparing a cobalt-nickel co-doped copper nanowire through a hydrothermal method, then preparing graphite carbon nano aerogel by taking the cobalt-nickel co-doped copper nanowire as a template, etching to remove the copper nanowire through a FeCl3-HCl etching solution to obtain a graphite carbon nanotube frame, and finally preparing the graphite carbon nanotube frame by taking aniline as a polymeric monomer, ammonium persulfate as an initiator and phytic acid as a phosphorus source. The preparation process parameters are controllable, and the problems that an existing graphite negative electrode is low in specific capacity and poor in cycling stability, cobalt-nickel particles are prone to agglomeration and passivation, a carbon frame structure is incomplete, coating is uneven and the like are solved.

The invention relates to a preparation method of a copper nanowire. The preparation method comprises the following steps: collecting biomass with a fiber structure, washing and drying; dissolving copper salt to obtain a copper salt solution; mixing a copper salt solution with the dried biomass with the fiber structure, and carrying out in-situ reduction reaction under a hydrothermal condition to obtain a reaction product; and centrifuging, washing and drying the reaction product to obtain the copper nanowire. The preparation method of the copper nanowire is simple in process, low in cost and environmentally friendly, and the copper nanowire obtained through the preparation method can be applied to the fields of flexible transparent electrodes, wearable electronic equipment, efficient catalysts, sensors, heat conduction filler, antibacterial materials and the like.

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 application belongs to the technical field of water electrolysis hydrogen evolution in neutral solution, and provides a preparation method of copper@molybdenum modified nickel phosphate nanorod array. The material is a core-shell structure nanorod array obtained by depositing molybdenum modified nickel phosphate on copper nanowire. The nanorod array is prepared by combining the preparation processes of immersion method, electro-reduction method and electrodeposition method. The addition of molybdenum and the nanorod structure can effectively improve the conductivity of the catalyst, improve the electron transfer capacity, increase the number of exposed active sites of the catalyst, and promote the hydrogen evolution activity of the catalyst in the neutral solution. When the current density is 10 and 100 mA / cm 2 , the minimum overpotential required for water electrolysis hydrogen evolution is 35 and 195 mV, respectively, which is much lower than that of the hydrogen evolution electrocatalyst prepared by directly loading molybdenum modified nickel phosphate on the surface of the copper foam without molybdenum modification. At the same time, when the current density is -10 mA / cm 2 , the catalyst can be stably operated for at least 25 hours.

The present application relates to a kind of high flexibility flame-retardant composite, bundled cable and its preparation method, belong to cable material technical field, by hydrothermal method synthesis CoFe2O4 Nanoparticle, then it is compounded with graphene oxide, copper nanowire, forms three-dimensional porous composite aerogel, after ultrasonic stripping, graphene oxide sheet layer forms stable conductive framework, the melting point of copper nanowire is higher, can keep continuous conductive network structure in high temperature heat treatment, avoid melting agglomeration, interface combination is more stable, CoFe2O4 Nanoparticle is embedded in sheet layer gap, realizes interface close combination after high temperature heat treatment, graphene oxide strengthens network continuity, copper nanowire is generated by reflection electromagnetic wave conductive loss, and the magnetic hysteresis loss of CoFe2O4 Nanoparticle forms complement, in wide frequency range, shielding effectiveness fluctuation is smaller, can effectively resist the interline electromagnetic coupling of strong electricity, weak electricity when bundled laying, guarantee signal transmission stability.