1060 results about "Nanorod" patented technology

The invention relates to the field of aluminum materials, and provides an automobile corrosion-resistant aluminum material and a preparation method thereof.The automobile corrosion-resistant aluminum material is prepared from cerium oxide loaded aluminum oxide nanorods, scandium / boron nitride nanotubes, zirconium powder, magnesium powder, copper powder, manganese powder, silicon carbide nanoparticles, TiB2 nanoparticles, aluminum powder and stearic acid. Wherein the cerium oxide loaded aluminum oxide nanorod is composed of an aluminum oxide nanorod and cerium oxide nanoparticles loaded on the surface of the aluminum oxide nanorod, and the scandium / boron nitride nanotube is composed of a boron nitride nanotube and a scandium nanolayer uniformly coated on the surface of the boron nitride nanotube. The material is prepared through mechanical ball milling, cold isostatic pressing forming, vacuum sintering and aging treatment, and finally the aluminum-based composite material containing the Al3Sc nano precipitated phase and the boron nitride nanotube reinforced phase is formed. And an Al3Sc precipitated phase and an aluminum matrix form a coherent interface, so that the strength, the corrosion resistance and the wear resistance of the material are improved. Through nanostructure optimization, high performance of the aluminum alloy is achieved, and the aluminum alloy is suitable for the fields of automobiles, aerospace and the like.

The invention belongs to the technical field of nano porous materials, discloses a high-strength and low-thermal-conductivity SiC-TiO2 nanofiber aerogel and a preparation method thereof, and aims to solve the problems of insufficient structural stability, shear strength and high-temperature thermal conductivity of traditional ceramic aerogel. TiO2 nanorods are introduced onto a SiC nanofiber membrane by adopting an in-situ growth technology, and the high-strength and low-thermal-conductivity SiC-TiO2 nanofiber aerogel is prepared. And constructing the SiC nano composite fiber membrane into the layered porous ceramic nanofiber aerogel with a multilevel structure by combining a layer-by-layer stacking method with a directional freezing casting technology. TiO2 nanorods growing on the surface of the SiC fiber in situ serve as a secondary structure, so that the overall mechanical performance of the material is enhanced; the TiO2 nanorods have specific high infrared light reflection and scattering capabilities, so that the transmittance of the aerogel material to radiation is reduced, and the thermal radiation conduction in a high-temperature environment is effectively reduced. In addition, a silica sol binder is introduced between layers of the aerogel multilevel structure, stable bonding points are formed between fibers after calcination, and the mechanical stability is improved.

The invention belongs to the technical field of photocatalysis, and particularly discloses a diatomic metal complex / CdS nanorod composite photocatalyst as well as a preparation method and application thereof. The specific preparation method comprises the following steps: synthesizing a pure CdS nanorod by using an EDA assisted solvothermal reaction; then carrying out Schiff base reaction, heating in an oil bath, and condensing and refluxing to synthesize a diatomic metal complex; and putting the diatomic metal complex and the CdS nanorod into a beaker, adding ethanol, uniformly stirring and drying to obtain the diatomic metal complex and CdS nanorod photocatalytic composite material, namely the target product. The CdS nanorod is of a rod-shaped hexagonal crystal structure, the diatomic metal complex is blocky and is loaded on the wall of the CdS nanorod after being compounded with the CdS nanorod, and the main morphology of the CdS nanorod is not changed. According to the invention, the diatomic metal complex is compounded with the CdS nanorod, so that photo-induced electrons and holes can be effectively separated, and the activity of photocatalytic formic acid decomposition to prepare synthesis gas (H2 + CO) is improved.

A method including detecting contaminants in a water sample using a machine learning algorithm having a Laplacian operator configured to extract Raman peak data, a deep neural network, and a K nearest neighbors (KNN) cluster model. The method may include a test system having a silicon nanofiber film, a plurality of ZnO nanorods arranged in an array on the silicon nanofiber film, and a plurality of silver particles disposed on the plurality of ZnO nanorods. A water sample may be applied onto the test system, and the water sample may be measured using surface-enhanced Raman spectroscopy to generate the Raman peak data used in the machine learning algorithm.

The invention provides a metasurface based on spin decoupling and a preparation method thereof. The metasurface comprises a substrate layer and a plurality of rectangular nano columns located on the substrate layer. Wherein the lengths, the widths and the rotation angles of the rectangular nano-columns are different, and the rectangular nano-columns have high transmittance and [0, 2pi] all-phase coverage and meet the conditions of a half-wave plate; the plurality of rectangular nanorods regulate and control the left-handed circularly polarized light and the right-handed circularly polarized light through a preset phase, so that a preset function is realized; the preset phase comprises a propagation phase and a geometric phase. According to the metasurface provided by the invention, the substrate layer and the rectangular nanorod array with various sizes and different rotation angles are fused, so that accurate and independent phase regulation and control on the circular polarization state of incident light are realized, and the constraint of mutual interference of spinning states in a traditional optical element is thoroughly eliminated; different circularly polarized light signals can be distinguished and independently processed under a single wavelength, and the optical regulation degree of freedom is shown.

The invention discloses a crosslinked polyethylene insulated flame-retardant power cable, which sequentially comprises a cable core, a shielding layer, an inner sheath layer, an armor layer and an outer sheath layer from inside to outside, and is characterized in that the inner sheath layer or the outer sheath layer is obtained by respectively extruding a sheath material on the outer side of the shielding layer or the armor layer; the sheath material is prepared from the following raw materials: low-density polyethylene, high-density polyethylene, phosphate modified yttrium-graphene nano porous particles, hydroxyapatite porous nanorods, a cross-linking agent, an assistant cross-linking agent, an antioxidant and the like. The obtained power cable has excellent insulativity and flame retardance and has a good application prospect in the field of high-voltage power transmission.

The present invention provides an electrochromic fabric and a preparation method thereof. The conductive fabric is treated to make its surface rich in active functional groups; oxalic acid and sodium tungstate solution are mixed, hydrochloric acid is added to adjust the pH, and then n-butanol is added to obtain a precursor solution. The fabric is placed in the precursor solution for high-temperature reaction to obtain the electrochromic fabric. By pre-treating the fabric, the number of functional groups on the fabric surface is increased, and adjusting the pH enhances the binding force between WO3 and the fabric; n-butanol ensures the stable formation of tungsten trioxide, promotes the interaction between oxalic acid and the functional groups on the fabric surface, improves the interfacial interaction force between the WO3 crystal nucleus and the fabric, and at the same time affects the crystal nucleus growth direction, forming a nanorod-like or three-dimensional microsphere structure, and improving the electrochromic performance. Through the synergistic cooperation of each process and related parameters, the electrochromic fabric of the present invention has obvious color change, good cycle stability and high mechanical properties; and the process is simple, the cost is low, and it is suitable for industrial mass production.

The invention relates to the technical field of nano materials and biological medicines, in particular to application of structurally reversible gel in preparation of a physical blood coagulation material, the structurally reversible gel comprises loosely assembled nanorod assemblies and a solution for dispersing the loosely assembled nanorod assemblies; the nanorod assembly comprises an inorganic one-dimensional nanorod and anions capable of participating in the assembly of the inorganic one-dimensional nanorod; the inorganic one-dimensional nanorod at least contains rare earth metal elements. The physical blood coagulation material simulates the assembly process of fibrin, shows excellent hemostasis capability independent of natural hemostasis, reduces the blood coagulation factor level, and effectively avoids the thrombus risk caused by excessive blood coagulation. In addition, the material is simple and stable in component, low in preparation cost, high in safety and capable of being stored and used for a long time.

The invention relates to an indium oxide carbon monoxide gas-sensitive material as well as a preparation method and application thereof. The gas-sensitive material has a heterogeneous three-stage hierarchical structure, is prepared from indium oxide sheets with a hollow structure consisting of small-diameter nanorods and a high specific surface area, shows rich active crystal faces and adsorption oxygen bonds, can effectively adsorb more oxygen and carbon monoxide gas molecules, and promotes the oxygen and carbon monoxide gas molecules to generate a redox reaction with hydrogen on the surface of the material, so that the gas-sensitive material has a good application prospect. Therefore, the detection precision of the carbon monoxide gas is obviously improved. According to the preparation method, toxic materials are not used, preparation is safe, the synthesis route is simple, repeatability is good, cost is low, and a new thought is provided for efficient and environment-friendly preparation of high-performance gas sensitive sensor materials.

The invention discloses a composite film based on light-biological synergistic gradient degradation and a preparation method thereof, the composite film sequentially comprises a light response layer, a transition layer and a biological response layer from outside to inside, and the light response layer comprises a polycaprolactone matrix, a tetraphenylporphyrin iron photosensitizer and anatase type TiO2 nanorods; the transition layer is a gradient blend of polylactic acid and modified starch; the biological response layer comprises polyhydroxyalkanoate and bacterial cellulose nanofibers; through the design of the three-layer gradient structure and the construction of the bionic microchannel, the synergistic effect of light degradation, hydrolysis and biodegradation is realized; the composite membrane has excellent mechanical properties and environmental adaptability, the degradation period can be accurately regulated and controlled within 30-180 days, and the soil degradation rate within 60 days reaches 91% or above; the preparation method comprises the processes of electrostatic spinning, gradient co-extrusion and bacterial cellulose in-situ culture. The material can be widely applied to the fields of agricultural mulching films, food packaging and the like, and the problems that a traditional degradable film is poor in mechanical property and uncontrollable in degradation are solved.

The invention discloses thixotropic pure inorganic gel with adjustable physical properties as well as a preparation method and application of the thixotropic pure inorganic gel. The pure inorganic gel comprises loosely assembled nanorod assemblies and a solution for dispersing the loosely assembled nanorod assemblies, the nanorod assembly comprises an inorganic one-dimensional nanorod and anions capable of participating in the assembly of the inorganic one-dimensional nanorod; the inorganic one-dimensional nanorod at least contains rare earth metal elements. Compared with inorganic gel materials with other morphologies, the inorganic thixotropic gel disclosed by the invention can generate physical structure change through self-assembly of the inorganic one-dimensional nanorods, and has a relatively good physical property adjustment basis. And secondly, the inorganic one-dimensional nanorod can form an assembly through ions without additionally adding a surface modification reagent, the change of physical properties can be realized without replacing ligands, and the inorganic one-dimensional nanorod has extremely high advantages in various applications.

The invention provides a label-free magnetic self-assembly nanoprobe, a construction method thereof and application of the label-free magnetic self-assembly nanoprobe in detection of PrPC protein. The label-free magnetic self-assembly nanoprobe disclosed by the invention comprises a magnetic Fe3O4 / Fe2O3 (at) Au heteroplasmon nanorod array and a sulfhydrylation aptamer nucleic acid chain which is combined with the magnetic Fe3O4 / Fe2O3 (at) Au heteroplasmon nanorod array through an Au-S bond; a biosensor prepared from the label-free magnetic self-assembly nanoprobe is good in reproducibility and stability; the RSD value of multiple times of detection (intraday / day) is 1.55%; the storage time of multiple groups of sensors is 0-15 days, and the change of response signal values does not exceed 4%; the biosensor has a relatively low detection limit (1pg / mL), a relatively wide linear range (1 * 10 < pg / mL >-1 * 10 < 5 > pg / mL) and relatively good sensitivity, has very good application in detection of PrPC, and has very good practicability.

The invention belongs to the technical field of conductive polymer materials, and particularly relates to a three-dimensional polypyrrole conductive material and a preparation method and application thereof. The preparation method of the three-dimensional polypyrrole conductive material comprises the following steps: (1) preparing a metal copper quantum dot and graphene oxide mixed dispersion liquid; (2) adding an oxidizing agent to obtain a reaction solution; (3) adding a pyrrole monomer, and carrying out a polymerization reaction to obtain a graphene oxide / polypyrrole composite dispersion liquid; and (4) adding a reducing agent to reduce the graphene oxide to obtain the three-dimensional polypyrrole conductive material. After the metal copper quantum dots are loaded on the graphene oxide sheet layer, the graphene oxide sheet layer becomes a structure-oriented core in subsequent polymerization, and finally the stable three-dimensional conductive composite material with graphene as a framework and polypyrrole nanosheets as connection points is formed. Compared with a traditional three-dimensional material formed by overlapping and integrating a two-dimensional graphene sheet layer and a conductive nanowire / nanorod, the three-dimensional material with the structure can form an efficient conductive path more easily under the condition of low filler content.

The invention relates to the field of solder materials, and provides a non-ferrous metal solder for low-temperature brazing and application, the solder is composed of carbon-coated copper nanorods, tin-bismuth alloy-coated silver nanoparticles, 2-mercaptobenzimidazole, rosin resin, an organic active agent, a dispersing agent, ionic liquid, hydroxyethyl cellulose, indium nitrate and citric acid. The silver particles are of a core-shell structure and are coated with tin-bismuth alloy layers, and continuous carbon layers are formed on the surfaces of the copper nanorods, so that the conductivity and the interface stability of the solder are effectively improved. The non-ferrous metal solder with excellent conductivity, low melting point and good wettability is prepared through step-by-step mixing, hot press molding and low-temperature heat treatment processes, and is suitable for electronic device packaging, power device connection and flexible circuit interconnection, and the defects of existing solder in the aspects of low-temperature welding and high conductivity are overcome.

The invention provides a fabric-reinforced electroactive nerve conduit and a preparation method and application thereof, and belongs to the field of biomedical materials.The fabric-reinforced electroactive nerve conduit comprises a nerve conduit inner layer and a nerve conduit outer layer, the nerve conduit inner layer is a woven skeleton formed by magnesium wires serving as parallel yarns and degummed silk through a three-dimensional weaving process, the pore diameter of the nerve conduit inner layer is 1.5-2 mm, and the thickness of the nerve conduit inner layer is 0.5-1 mm; the outer layer of the nerve conduit is a composite layer with a radial finger-shaped porous structure, which is formed by directionally freezing and casting a hydrogel cross-linked network formed by mixing potassium sodium niobate nanorods modified by polydopamine and a biopolymer material, and the thickness of the outer layer of the nerve conduit is 1-2mm. A three-dimensional weaving technology, a piezoelectric nano material and a biopolymer material are combined, a novel multifunctional nerve conduit is developed to repair nerve injury, a better solution is provided for nerve repair, and the fabric enhanced electric activity nerve conduit has important practical guiding significance in application of future clinical nerve injury repair.

The invention relates to the technical field of biomedical engineering, and discloses a preparation method of a nano-enzyme SERS (Surface Enhanced Raman Scattering) sensor for detecting diabetic retinopathy, which comprises the following steps: (1) synthesizing a bimetallic gold-palladium nanorod; (2) assembling a gold trioctahedron array; and (3) modifying the surface of the gold-palladium nanorod synthesized in the step (1) with single-stranded DNA1 to prepare a nano-enzyme probe, hybridizing an aptamer of a vascular endothelial growth factor (VEGF) with single-stranded DNA2, modifying the surface of the gold trioctahedron array assembled in the step (2) with the hybridized aptamer, preparing a capture substrate, and constructing the nano-enzyme SERS sensor by the nano-enzyme probe and the capture substrate. In the detection process, the VEGF triggers a competitive recognition mechanism to promote the nano-enzyme probe to be captured by the capture substrate and catalyze tetramethyl benzidine (TMB) to generate oxTMB with a strong SERS signal. The sensor has the advantages of high sensitivity, strong specificity and good accuracy, and can realize rapid quantitative detection of DR biomarkers in serum.

The invention relates to a preparation method and application of a hollow nanorod array oxygen evolution electrode, and belongs to the field of hydrogen production by alkaline electrolysis of water. The self-supporting nickel-iron double-metal hydroxide nanosheet coated cobalt hydroxide hollow nanorod array oxygen evolution electrode is obtained through a continuous electro-deposition method; foamed nickel is used as a substrate, and catalytic active components loaded on the substrate are cobalt hydroxide and ferro-nickel double-metal hydroxide; a hollow nanorod structure vertically grows on the surface of the foamed nickel substrate, and the hollow nanorod structure comprises a hollow nanorod-shaped cobalt hydroxide layer located in the hollow nanorod structure and a plurality of layers of nickel-iron double-metal hydroxide nanosheets wrapping the surface of the hollow nanorod-shaped cobalt hydroxide layer; the diameter of the hollow nanorod is 0.2-1 micron, and the length of the hollow nanorod is 2-3 The electrode provided by the invention has unique morphology and good oxygen evolution catalytic activity.

The invention discloses a preparation method and application of a nickel-doped graded nano array electro-catalysis material, and relates to the technical field of nano material preparation, the preparation method comprises the following steps: preparing a solution by taking foamy copper as a substrate material and sodium hydroxide and ammonium persulfate as raw materials; a copper hydroxide nanobelt array precursor is synthesized on a foamy copper substrate in an in-situ growth mode through chemical oxidation treatment, then the precursor is converted into a nickel-doped cuprous sulfide nanorod array through hydro-thermal treatment, uniform nanosheets are formed on nanorods through the electro-deposition process, and the nickel-doped graded nanorod array electro-catalysis material can be obtained. By optimizing the synthesis method and adjusting the doping proportion, the obtained graded nano array shows relatively low overpotential and excellent stability in an electro-catalytic reaction, and the problems of low catalytic efficiency, poor durability and the like and insufficient stability of an existing catalyst are solved.

A single-crystal hollow ZSM-5 molecular sieve, and a catalyst containing the molecular sieve and a preparation method therefor and a use thereof. Particles of the single-crystal hollow ZSM-5 molecular sieve have a single-crystal structure with an average crystal grain size of 0.8-3.5 μm, and have an internally and externally nested double-layer cavity structure, wherein an inner cavity is at least partially closed by a first molecular sieve wall layer, an outer cavity is completely closed by a second molecular sieve wall layer, and an epitaxially grown nanorod shell layer is provided on the second molecular sieve wall layer. The single-crystal hollow ZSM-5 molecular sieve can be used for macromolecular catalytic cracking reaction, allowing for a higher low-carbon olefin yield, a higher BTX yield, and a higher ethylene / propylene ratio.

The invention discloses a barium ion single-doped / double-doped brookite titanium dioxide nanorod catalyst as well as preparation and application, the catalyst synthesized by a thermal decomposition method comprises brookite phase titanium dioxide and doped barium ions, and the nanorod-shaped catalyst containing oxygen vacancy defects has the width of 4-6 nanometers and the length of 20-50 nanometers. The piezoelectric property of brookite titanium dioxide is induced through doping of barium ions, charge separation is promoted through a built-in electric field, meanwhile, oxygen vacancies are induced through a charge compensation mechanism, the piezoelectric catalysis and photocatalytic efficiency is promoted, and the problems mentioned in the background technology are solved.

The invention relates to a surface-enhanced Raman scattering detection substrate, a preparation method thereof and a Raman scattering detection method. The surface-enhanced Raman scattering detection substrate comprises a silicon substrate, wherein at least one surface of the silicon substrate is provided with a functional area; the plurality of silicon nanorods are positioned in the functional region; the silicon nanorod comprises a main body part and a head part, the main body part is located between the head part and the silicon substrate, and the main body part is connected with the head part and the silicon substrate; the radial width of the head part is gradually reduced in the direction perpendicular to and away from the surface of the silicon substrate; the total area of orthographic projections of the silicon nanorods on the silicon substrate accounts for 1%-10% of the area of the functional area. According to the surface-enhanced Raman scattering detection substrate, enrichment of molecules to be detected in a three-dimensional space can be achieved, the signal enhancement capacity is high, and the detection sensitivity of target molecules can be remarkably improved.

The invention discloses an SERS (Surface Enhanced Raman Scattering) substrate for solution in-situ rapid detection as well as preparation and application thereof, and belongs to the technical field of substance detection. Comprising a substrate, a nanorod array film growing on the substrate, and metal nanoparticles deposited on the outer side surfaces of nanorods. The sensor has the advantages of portability of a solid substrate, strong plasmon resonance absorption in a broadband visible light region, strong surface enhancement effect and the like, and trace substances and microorganisms in a solution can be rapidly detected through the surface enhancement Raman effect; when substances in a solution are tested, pretreatment such as mixing, adsorption and drying is not needed, the limitation that in-situ detection of a traditional surface enhanced Raman base in the solution cannot be achieved is broken through, pretreatment-free in-situ and second-level ultrafast detection can be achieved, operation is easy, cost is low, and sensitivity is high. The problems that an existing SERS substrate is poor in stability and repeatability, and in-situ, ultrafast, trace and portable detection of substances in a solution cannot be achieved are solved.

The invention relates to the field of ceramic materials, provides a high-voltage-resistant PTC (Positive Temperature Coefficient) thermal sensitive ceramic material as well as a preparation method and application thereof, and aims to improve the voltage resistance and PTC effect stability of thermal sensitive ceramic. The material is composed of aluminum oxide-coated manganese-doped barium titanate nanorods, hollow-core silicon dioxide microspheres and a glass phase sintering aid, and the electric heating performance and the microstructure stability are optimized by constructing a core-shell structure and a three-dimensional composite system. A hydrothermal method and a sol-gel method are adopted to precisely control a raw material structure, and alcohol dispersion, tape casting and weak oxidizing atmosphere sintering are combined, so that the compactness and consistency of the ceramic are ensured. The material is suitable for high-voltage temperature control elements and over-current protection devices, and is widely applied to the fields of new energy automobile battery pack over-temperature protection, high-voltage power equipment current limiting elements, industrial automatic temperature control switches and the like.

The invention discloses a Mo-Bi-based catalyst and a preparation method and application thereof.The catalyst comprises active components, the active components comprise spherical particles and molybdenum oxide nanorods attached to the surfaces of the spherical particles, and the spherical particles contain molybdenum and / or molybdenum oxide and bismuth and / or bismuth oxide. When the catalyst is applied to propylene oxidation synthesis of acrolein, the catalyst has the technical effect of high acrolein selectivity.

The invention discloses a preparation method of a carbon fiber cloth coated SixFe1-xO2 nanorod material, which comprises the following steps: dissolving a silicon source and an iron source in a mixed solution of ethanol and ethylene glycol, adding hexamethylenetetramine and urea step by step, stirring and dissolving to obtain a mixed solution, then putting the mixed solution and carbon fiber cloth into a high-pressure reaction kettle together, and stirring for 30-60 minutes to obtain the carbon fiber cloth coated SixFe1-xO2 nanorod material. The preparation method comprises the following steps: adding a carbon fiber cloth coated SixFe1-x (OH) 4 nanorod material into a reaction kettle, reacting at a certain temperature in a constant-temperature drying box, then naturally cooling to room temperature, washing and drying to obtain the carbon fiber cloth coated SixFe1-x (OH) 4 nanorod material, putting the carbon fiber cloth coated SixFe1-x (OH) 4 nanorod material into a muffle furnace, and annealing in an air environment to obtain the carbon fiber cloth coated SixFe1 The synthesis process is simple, the cost is low, the requirement for equipment is low, the controllable degree is high, and the obtained product is uniform and novel in morphology, has high charging and discharging capacity and long cycle life as a flexible negative electrode material, and has wide application in the fields of flexible batteries, photoelectric devices and the like.

The invention discloses a dynamic linear polarization device design based on a phase-change diatomic metasurface, and relates to the technical field of phase-change metasurfaces, and the linear polarization device is a single-layer metasurface formed by a super unit composed of a dielectric material nano column 1 and a phase-change material nano column 2. Wherein the nanorod 1 is represented as a half-wave plate and is responsible for realizing the conversion of a polarization state, and the nanorod 2 can realize the change of a phase from 0 to pi by changing the state of a phase change material, so that the effect of maintaining the polarization is achieved. When light rays act on the two kinds of nano-columns at the same time, the nano-columns 2 allow transmission light to keep the original polarization state of incident light, and the nano-columns 1 change the polarization state of the transmission light. And the two kinds of transmission light are superposed subsequently, so that the transmission light output by the whole super-unit shows the linear polarization characteristic, and the polarization angle of the transmission light and the rotation angle of the nano-column are kept consistent or form an orthogonal relationship. According to the invention, a phase-change diatomic structure is adopted, so that the metasurface can realize a linear polarizer with an adjustable polarization angle under the incidence of any polarization angle.

The invention discloses a vanadium-doped lithium manganese iron phosphate positive electrode material as well as a preparation method and application thereof. Secondary hydrothermal treatment is adopted, so that the particle size and the size of the material can be obviously controlled, short nanorod particles of lithium manganese iron phosphate grow into nanoparticles with the length smaller than 100 nm and the width smaller than 20 nm in an oriented mode, the diffusion size of Li < + > in the [010] direction is reduced, the diffusion path of Li < + > is shortened, meanwhile, ammonium metavanadate serves as a vanadium source to carry out Fe / Mn site substitution on the lithium manganese iron phosphate positive electrode material, and the lithium manganese iron phosphate positive electrode material is obtained. The preparation method has the advantages of reducing the dissolution behavior of manganese, increasing lattice defects, improving the lattice constant, carrying out double-layer modification of morphology and structure, ensuring the migration rate of Li < + > in the charge-discharge process, and realizing the improvement of the electrochemical performance of the lithium manganese iron phosphate positive electrode material.

The invention relates to a copper-cobalt modified photocathode and preparation thereof and application of the copper-cobalt modified photocathode in photoelectrocatalysis of urea synthesis, and belongs to the technical field of electrode materials, a copper-cobalt double-monatomic coating layer is constructed on the surface of a Cu2O nanorod, the copper-cobalt modified photocathode material Cu2O coated Cu1Co1 / NC is prepared, the corrosion resistance of the Cu2O photocathode is improved, and meanwhile, the photocathode material Cu2O coated Cu1Co1 / NC can be applied to photoelectrocatalysis of urea synthesis. And the double active centers are also utilized to improve the efficiency of preparing urea by catalyzing CO2 / NO3 <-> reduction by the Cu2O photocathode.

The invention belongs to the technical field of carbon nanomaterials, and particularly relates to a highly graphitized carbon tube grid of a scaffold-like structure and a preparation method and application of the highly graphitized carbon tube grid. The preparation method comprises the following steps: taking aluminum oxide with interconnected pore channels inside as a template, and obtaining a three-dimensional interconnected nickel nanorod grid film through an electro-deposition method; by utilizing the catalytic graphitization property of metal nickel and regulating and controlling parameters of acetylene when the acetylene is decomposed on the surface of the metal nickel, the problem that three-dimensional highly-graphitized carbon with controllable morphology and size cannot be synthesized due to nickel deformation caused by a catalytic mechanism is solved, and the highly-graphitized carbon tube grid with a scaffold-like structure is obtained; and the crystallinity of the carbon tube grid film is effectively improved at a relatively low temperature. The preparation process is simple, feasible and environment-friendly, and equipment is low in cost and common. A smooth ion transport channel provided by the vertical carbon tube array and a rapid electron conduction network provided by the highly graphitized interconnected carbon tube structure are expected to be used in the fields of alternating current filtering, high power output and the like.