223 results about "Anode oxidation" patented technology

The invention belongs to the technical field of electrocatalytic oxidation, and particularly relates to an electrocatalytic active anode film capable of efficiently producing active chlorine and a preparation method and application of the electrocatalytic active anode film. Porous foam titanium is used as a base material, a surface oxidation layer is removed through acidification pretreatment, a titanium dioxide nanotube array grows on the base material in situ through two times of anodic oxidation to serve as a middle layer, and the binding force of the catalyst and the substrate is effectively improved; meanwhile, Ti < 4 + > in TiO2 is partially converted into Ti < 3 + > through a cathode reduction method, so that the conductivity of the material can be enhanced; furthermore, a RuO2 catalytic layer capable of reducing the chlorine evolution potential is loaded on the titanium dioxide nanotube array, so that the electrocatalytic activity is improved. The prepared anode film has a porous structure, and when the anode film is applied to a Flow-through system, the yield of active chlorine and the contact oxidation efficiency of pollutants on an interface of the anode film are improved, and the problem of mass transfer limitation is solved. The electrocatalytic active anode film can realize high-efficiency decoloration of printing and dyeing wastewater under the conditions of no addition of chemicals and low energy consumption.

The invention belongs to the technical field of pharmaceutical wastewater treatment, and particularly relates to a device and a method for treating antibiotic production wastewater by coupling catalytic hydrolysis and catalytic degradation. The device comprises a catalytic hydrolysis reactor and an electro-catalysis reactor, the two reactors are connected in series through a pipeline with a water stop valve, the catalytic hydrolysis reactor is divided into a plurality of compartments by water baffles, and each compartment is filled with a catalytic porous hydrolysis filler; and a cathode, an anode and a stirrer are arranged in the electro-catalytic reactor. By utilizing the porous hydrolysis filler in the device, selective catalytic hydrolysis of high-concentration antibiotics in wastewater is completed by controlling the hydraulic retention time, the anodic oxidation efficiency is improved by virtue of the high contact reaction area of the porous blocky anode, and efficient mineralization degradation of residual antibiotics and hydrolysates thereof is realized. The treatment device and method for the antibiotic production wastewater are good in selective hydrolysis effect, high in mineralization degradation efficiency, easy and convenient to operate and maintain and low in energy consumption.

The invention belongs to the technical field of biological material surface modification, and discloses a medical titanium alloy surface bionic multifunctional composite coating and a preparation method thereof. According to the method, the medical titanium alloy is sequentially subjected to micro-arc oxidation and anodic oxidation, and then the bionic multifunctional composite coating on the surface of the medical titanium alloy is prepared. The purpose of micro-arc oxidation is to prepare a micron porous coating on the surface of the medical titanium alloy. According to anodic oxidation, a series of nano-coatings are synthesized on the surface of the micro-arc oxidation coating, the nano-coatings can be composed of discontinuous cauliflower-shaped nano-particles or can be of a continuous film-forming cauliflower-shaped structure, and the thickness of the nano-coatings can be from the nanometer level to the micrometer level. According to the coating, the biological function is further improved through the nano coating while the mechanical anchoring effect of the micron porous structure on new bone tissue is maintained. Even if the coating is damaged by external force, the high binding force of the coating does not cause the failure of the coating, and the coating also has good wear resistance and corrosion resistance.

The invention provides a method for coupling vanadium extraction through ore pulp electrolysis and new energy utilization. The method comprises the following steps: step 1, crushing a vanadium-containing raw material; step 2, adding a leaching agent into the crushed vanadium-containing raw material, and stirring to obtain ore pulp; 3, the ore pulp is placed in an anode of an electrolytic bath, and an oxidation state substance is added into a cathode of the electrolytic bath; step 4, turning on a power supply, carrying out oxidation reaction on vanadium at the anode of the electrolytic cell, and dissolving the vanadium into the solution by the leaching agent at the same time; and the cathode oxidation-state substance is reduced in the electrolytic bath to obtain a reduction-state substance. According to the green vanadium extraction method, vanadium is leached out through ore pulp electrolysis, electrolytic bath anodic oxidation and a leaching agent. When the oxidation-state substance is water or CO2, the method not only realizes reduction of hydrogen or carbon dioxide, but also replaces an anode oxygen evolution process with an oxidation leaching process of vanadium, so that the cost is remarkably reduced.

The invention belongs to the technical field of photoelectric catalytic materials, and particularly relates to an experimental method for rapidly preparing a copper oxide nanowire and application of the copper oxide nanowire. The preparation method comprises the following steps: adopting a copper net as a substrate, rapidly preparing a Cu (OH) 2 nanowire array on the surface of the copper net through a constant-voltage anodic oxidation method, rapidly dehydrating Cu (OH) 2 through high-temperature heat treatment, and preparing the CuxO nanowire array in situ. Compared with the existing P-type semiconductor material, the material has a wider visible light absorption range as a photoelectric catalytic material, and has better performance in the fields of hydrogen production through photoelectric water decomposition and photo-assisted Li-CO2 batteries. The problem of low light energy utilization rate is solved, and the copper oxide nanowire material is beneficial to separation of photo-induced electrons and hole pairs, so that the charge-discharge voltage close to a theoretical value can be measured when the copper oxide nanowire material is used as the positive electrode material of the Li-CO2 battery.

The invention discloses a preparation method and application of a nickel-doped lead dioxide ozone catalytic anode, a titanium substrate is used as an anode, a titanium sheet is used as a cathode for anodic oxidation, an obtained titanium dioxide nanotube array is used as an anode, a titanium sheet is used as a cathode for secondary anodic oxidation, and the nickel-doped lead dioxide ozone catalytic anode is obtained. And putting the obtained titanium dioxide nanotube array electrode of the new oxide layer into a tubular furnace, calcining in an air atmosphere, taking the titanium dioxide nanotube array electrode of the transition layer as a cathode, taking a titanium plate as an anode, and performing electrochemical reduction in a formic acid solution to obtain the titanium dioxide nanotube array electrode of the transition layer. The obtained electrode with the high-conductivity titanium dioxide nanotube array transition layer serves as an anode, a titanium sheet serves as a cathode, electrodeposition is carried out in an acid electrodeposition solution to obtain a beta-PbO2 layer, and finally the Ti / TNAs / Ni-PbO2 anode is prepared, the anode is high in stability and long in service life and can work for a long time without affecting the catalytic activity of the anode, and the application range of the Ti / TNAs / Ni-PbO2 anode is wide. The method has a certain application prospect in the aspect of electro-catalytic ozone treatment of organic wastewater.

The invention discloses a rare earth element doped stainless steel oxygen evolution electrode and a preparation method thereof, and belongs to the technical field of electrode preparation. The preparation method of the stainless steel oxygen evolution electrode comprises the steps that stainless steel with impurities removed serves as an anode and is placed in an alkaline solution with the concentration being 7-12 mol / L, cyclic voltammetry is adopted, stainless steel treated through cyclic voltammetry is obtained, and the potential window is-0.3 V to 1.5 V; the stainless steel is placed in an alkaline solution with the concentration being 1-2 mol / L and serves as an anode for electrolysis, and anodic oxidation stainless steel is obtained; the anodic oxidation stainless steel is placed in a cerium ion solution, a cyclic voltammetry method is adopted, the stainless steel serves as an anode to be treated, and a stainless steel oxygen evolution electrode is obtained through electro-deposition; wherein the potential window is-1.5 V to 1.0 V (+ / -0.5 V). The preparation method is simple, the cost is low, large-scale preparation is easy, long-time, high-temperature and other complex preparation processes are not needed, and when the electrode is used as an electrode for electrolyzing oxygen evolution in water, the electrode has excellent catalytic activity and shows huge application prospects in large-scale industrial hydrogen production through water electrolysis.

The invention discloses an anti-oxidation and anti-corrosion coating for an aluminum electrolysis carbon anode and a preparation method of the anti-oxidation and anti-corrosion coating, the coating comprises the following components in percentage by mass: 30%-40% of a main component, 15%-25% of a secondary component, 10%-15% of a binder, 15%-25% of an anti-corrosion additive and the balance of water, and the main component comprises white corundum powder, red corundum powder and microcrystalline corundum powder; the secondary component comprises a secondary component 1 and a secondary component 2, and the secondary component 1 comprises phlogopite, biotite and soda mica; the secondary component 2 comprises potassium feldspar, albite and anorthite; the binder is sodium water glass and potash water glass. The anti-oxidation and anti-corrosion coating for the aluminum electrolysis carbon anode is simple and convenient to prepare, the carbon anode in work can be well protected after being coated with the anti-oxidation and anti-corrosion coating, the weight loss ratio of samples of all embodiments is calculated to be only about 0.8%, and the problems of anode oxidation and coating corrosion are effectively relieved.

The invention discloses an electrode material for an H-type electrolytic cell. The electrode material comprises a cathode material and an anode material. The invention also discloses a method for simultaneously degrading typical explosive-deficient / rich wastewater, which comprises the following steps: separating a cathode chamber from an anode chamber by using an H-shaped electrolytic cell and a proton membrane, adding an electron-deficient organic pollutant aqueous solution into the cathode chamber, adding an electron-rich organic pollutant aqueous solution and peroxymonosulfate into the anode chamber, and carrying out electrolysis to obtain the typical explosive-deficient / rich wastewater. The cathode material and the anode material serve as a cathode and an anode respectively, SO4 < 2->, HCO3 <->, Cl <->, NO3 <-> or HPO4 < 2-> serve as electrolyte, and electron-deficient organic pollutants and electron-rich organic pollutants are degraded at the same time under the action of impressed current. The heterogeneous electro-Fenton system and the anodic oxidation system are combined, electron-deficient explosives such as HMX and electron-rich explosives such as DNAN can be degraded at the same time, and the high degradation rate is kept in different electrolyte environments and under the wide pH range.

The invention relates to a non-noble metal-based paired electro-catalysis method for producing formic acid by coupling cathode dehalogenation with anode formaldehyde oxidation, which realizes efficient dehalogenation removal of pollutants and generation of high-value products. The Co-CuxO nanowire electrode with excellent catalytic performance is synthesized through a simple method and serves as a cathode and an anode at the same time, and the purpose that the cathode removes halogenated pollutants and the anode oxidizes formaldehyde to produce formic acid at the same time is achieved. Co-CuxO promotes generation of H *, the performance of electroreduction dehalogenation is improved, and the removal rate of trichloroacetic acid can reach 92.1% or above. And moreover, the reaction energy barrier is reduced, the selectivity of formic acid generated by oxidizing anode formaldehyde is improved, and the formic acid selectivity and Faraday efficiency can reach 100%. A paired electro-catalysis system shows extremely stable and outstanding electro-catalysis performance in the aspect of converting wastes into value-added products, and the problems of poor anode utilization rate and high energy consumption in the current electro-catalysis dehalogenation reaction are solved.

A porous layer is arranged on the surface of the inner wall of a micro-channel in the micro-channel heat exchanger, and the porous layer is filled with a lubricating agent; and anodizing the inner wall of the micro-channel to obtain a porous layer. The invention further provides a preparation method of the ultra-smooth micro-channel heat exchanger, which comprises the following steps: taking the micro-channel heat exchanger as an anode, performing anodic oxidation treatment on the inner wall of the micro-channel, and preparing the porous layer on the surface of the inner wall of the micro-channel; and then the porous layer is filled with a lubricating agent, and the ultra-smooth micro-channel heat exchanger is obtained. The invention further provides application of the ultra-smooth micro-channel heat exchanger in electronic devices. The ultra-smooth micro-channel heat exchanger has good corrosion resistance and high boiling heat exchange efficiency.

The invention provides a method for removing nitrate in water by using a modified zero-valent iron aerogel electrocatalyst, which comprises the following steps: preparing a mixed solution of ferrous sulfate and sodium sulfide, preparing a sodium borohydride solution, mixing and magnetically stirring the mixed solution and the sodium borohydride solution to obtain black colloid, and finally obtaining vulcanized zero-valent iron aerogel, dispersing the obtained sulfurized zero-valent iron aerogel and a Nafion solution in absolute ethyl alcohol to prepare a catalyst mixed solution; potassium nitrate and potassium hydroxide are dissolved in a pure water solution to serve as electrolyte, a sulfurized zero-valent iron aerogel electrode is used as a cathode, a platinum sheet is used as an anode, a mercuric oxide electrode is used as a reference electrode, and an electrocatalytic reduction reaction is carried out by using a three-electrode system. The technology not only can improve the efficiency of water nitrate pollution treatment, but also conforms to the concept of green and low-carbon development, and has a wide environment application prospect.

The invention discloses an ultrasonic vibration auxiliary electrochemical mechanical thinning method and device for a large-diameter wafer, and belongs to the technical field of large-diameter semiconductor wafer thinning, and the device comprises a grinding system, an electrochemical system and an electrolyte circulating system. The grinding system comprises a micro-feeding unit, a main shaft rotating unit and an ultrasonic vibration unit, and the main shaft rotating unit and the ultrasonic vibration unit drive the cup-shaped grinding wheel to rotate and axially vibrate. The electrochemical system takes a cup-shaped grinding wheel as a cathode and a wafer as an anode, and an electrolyte is supplied between the cathode and the anode to generate electrochemical reaction. In the thinning process, the surface of the wafer is subjected to anodic oxidation modification to generate a modification layer easy to remove, meanwhile, the generated modification layer is removed by the grinding wheel, the grinding wheel with ultrasonic vibration facilitates chip removal and heat dissipation, circulation of electrolyte can be enhanced, and then the electrochemical modification effect is improved; the annular structure of the grinding wheel has better removal uniformity under the vibration condition, and efficient, high-precision and low-damage large-diameter wafer thinning can be achieved.

The utility model belongs to the technical field of anodic oxidation equipment, and particularly relates to a cooling circulation mechanism and an anodic oxidation tank, the cooling circulation mechanism comprises a liquid inlet pipe and a liquid outlet pipe which are arranged in a liquid cavity in a penetrating mode, and ports, outside the liquid cavity, of the liquid inlet pipe and the liquid outlet pipe are connected in series through a circulation pump. A pipeline, in the liquid cavity, of the liquid inlet pipe is distributed along the vertical face of the inner cavity, a plurality of liquid through holes are formed in a pipe body, an air blowing pipe arranged along the bottom of the liquid cavity is arranged between the liquid inlet pipes, and the liquid through holes are formed towards the air blowing pipe. Liquid circulation is established in the tank body to enable the liquid to move, so that the conduction efficiency of the liquid temperature is improved, and the balance of the liquid temperature is kept. Meanwhile, the liquid inlet pipe is provided with the liquid through hole which changes in size according to the liquid flowing direction, and the temperature difference between the pipe head and the pipe tail is adjusted through flow, so that the liquid temperature is further guaranteed.

The invention relates to the technical field of hardware surface treatment, and particularly discloses a continuous surface treatment process for multicolor hardware, which comprises the following steps: S1, pretreatment: cleaning, degreasing and removing an oxide layer of the hardware to ensure that the surface of the hardware is clean; s2, bottom layer anodic oxidation is conducted, specifically, the hardware is put into an anodic oxidation tank containing electrolyte, and a layer of oxidation film is formed on the surface of the hardware; s3, the hardware is put into a dyeing tank to be subjected to primary dyeing treatment, and a ground color anodic oxide film layer is formed; s4, the hardware is dyed for the second time, and a surface color layer is formed; and S5, the hardware is cleaned, dried and polished, and a surface anodic oxide film pattern is formed. According to the method, two dyeing layers with different colors are formed on the surface of the hardware through two times of dyeing treatment, finally, a multi-color oxidation film layer is formed on the metal surface, the process is simple, and the finally formed oxidation film layer is good in binding force with a metal base material and good in abrasion resistance and corrosion resistance.

The invention belongs to the technical field of lactic acid production, and discloses a method for preparing lactic acid by electrocatalytic cathode and anode coupling, which comprises the following steps: assembling an anode catalyst as an anode, a cathode catalyst as a cathode and an electrolyte into an electrolytic tank; 1, 2-propylene glycol is added into the anolyte and the catholyte respectively; under the application of a certain voltage, 1, 2-propylene glycol is oxidized into lactic acid at the anode end; oxygen is continuously introduced into the catholyte, meanwhile, a ferrous compound is additionally added into the catholyte for catalysis to form hydroxyl free radicals, and electro-conversion of 1, 2-propylene glycol and oxygen is achieved through an electro-Fenton reaction to prepare lactic acid. Compared with single-side anodic oxidation, the method has the advantages that the energy utilization rate is increased, and a new thought and method are provided for green and efficient preparation of lactic acid at normal temperature, normal pressure and high current density.

The invention discloses a ruthenium-iridium composite electrode prepared by an electrochemical codeposition method and a preparation method and application thereof, and the preparation method of the ruthenium-iridium composite electrode comprises the following steps: 1) taking a titanium sheet as an anode, taking a platinum electrode or graphite as a cathode, and placing the anode and the cathode in an aqueous solution containing F <-> for anodic oxidation; (2) putting the sample subjected to anodic oxidation into a tube furnace, and carrying out heat treatment in argon or nitrogen to obtain an anatase type TiO2 nanotube; 3) taking the TiO2 nanotube as a cathode, and controlling a certain current in an aqueous solution containing Ru salt, Ir salt, NaNO3 and a small amount of SbCl3 for co-deposition to obtain Ru and Ir nanocrystals; and 4) fully oxidizing the sample deposited with the Ru and Ir nanocrystals at a certain temperature to obtain the ruthenium-iridium composite metal oxide electrode. The method is short in technological process and high in precious metal raw material utilization rate, and the prepared ruthenium-iridium composite metal oxide electrode has the advantages of being high in chlorine evolution electrocatalytic activity and long in service life. As an electrode material, the material has important application prospects and is suitable for the fields of chlor-alkali industry, water treatment, metallurgy and the like.

The invention discloses a preparation method of a membrane electrode for an acidic iron ion circulation auxiliary electrolytic hydrogen production system and application of the membrane electrode in low-power-consumption hydrogen production, and relates to the field of water electrolysis hydrogen production. The method comprises the following steps: 1, pretreating a substrate; 2, preparing catalyst ink; 3, preparing a cathode and an anode; and 4, hot-pressing and assembling. The membrane electrode used for the acidic iron ion circulation auxiliary electrolytic hydrogen production system serves as a working electrode to produce hydrogen in a proton exchange membrane electrolytic cell filled with an acidic electrolyte containing Fe ions with low power consumption, and Fe < 2 + > / Fe < 3 + > circulation promotes anodic reaction kinetics and reduces anodic oxidation potential, so that the water electrolysis energy consumption is remarkably reduced, and the hydrogen production efficiency is improved; the preparation method is simple and convenient, and the prepared membrane electrode is small in resistance and firm in interface bonding, has excellent electrochemical performance, is suitable for low-power-consumption hydrogen production of a PEM electrolytic cell in an acid system, and has wide application prospects.

There are provided a CO production device and a CO2 electrolysis device which allow a promotion of effective use of CO2 and a reduction in emission of CO2 into the air. A CO production device and CO2 electrolysis device 1 of an embodiment includes: a CO2 electrolysis apparatus 3 including a cathode 6 which electrolyzes CO2 to produce CO and an anode 7 which oxidizes a substance to be oxidized to produce an oxide; a CO purifier 4 which purifies CO from a gas containing CO supplied from the CO2 electrolysis apparatus 3; and a H2 purifier 5 which purifies H2 from a CO-extracted residual gas discharged from the CO purifier.

The utility model is suitable for the technical field of anodic oxidation tanks, and provides an anodic oxidation tank with a lifting structure, which comprises a sewage pool for collecting splashed electrolyte, the electrolysis tank is arranged in the sewage pool and is used for storing electrolyte; the electric guide rail is fixed on the outer wall of the electrolysis tank and is used for assisting in adjusting the position of the base material; the electric telescopic rod is arranged on the electric guide rail and is used for assisting in adjusting the height of the base material; the supporting rod is mounted on the electric telescopic rod through a connecting plate; and the hook is movably hung on the supporting rod and is used for supporting a base material. According to the anodic oxidation tank with the lifting structure, the height of a base material can be conveniently adjusted, the position of the base material can be adjusted after machining is completed, the base material can be conveniently kept in a hoisting state for flushing, electrolyte residues are reduced, and meanwhile sewage can be prevented from being mixed into electrolyte.

The utility model provides a metal / CFRTP (carbon fiber reinforced thermoplastic elastomer) composite structure. The metal / CFRTP composite structure comprises a lap joint of metal and CFRTP, the lap joint is specifically a lap joint formed by welding metal and a CFRTP material; in the lap joint, the metal surface is provided with an anodic oxide film. According to the metal / CFRTP composite structure, the anode oxide film is arranged in the metal / CFRTP composite structure, so that the metal / CFRTP composite structure with higher bonding strength is obtained. The anodic oxidation film is prepared on the metal surface, molten resin flows into oxidation film holes, mechanical embedding is formed between the CFRTP and the metal, meanwhile, the oxidation film can improve the surface energy of the metal, the wettability of the resin on the metal surface is improved, the mechanical embedding and chemical bonding effect between the metal and the CFRTP is promoted, and therefore the metal surface can be improved. And therefore, the bonding strength of laser connection between the metal and the CFRTP plate is remarkably improved.

The application relates to a substrate with micro-nano composite texture and a preparation method and application thereof, and belongs to the technical field of biological medicine. The preparation method comprises the following steps: S1, adopting a nanosecond laser to perform texture treatment on pretreated metal titanium, forming micro texture on the surface of the metal titanium, and obtaining micro texture metal titanium; S2, uniformly stirring ammonium fluoride in ethylene glycol, then uniformly stirring water in the ethylene glycol, and obtaining an electrolyte; S3, connecting the positive pole of a direct current power supply to the micro texture metal titanium as an anode, connecting the negative pole of the direct current power supply to a platinum electrode as a cathode, and performing magnetic field assisted anodic oxidation treatment on the micro texture metal titanium in the electrolyte, so that nano texture is formed on the surface of the micro texture metal titanium; and after cleaning and drying, a substrate with micro-nano composite texture is obtained. The substrate is applied to a drug-loaded coating of a metal implant, can realize micro-nano multi-scale cooperation, integrates the macrostructure advantage of the micron texture and the surface characteristics of the nanotube, and greatly improves the comprehensive performance of the drug-loaded coating.

The application discloses an aluminum electrolysis carbon anode anti-oxidation anticorrosion coating and a preparation method thereof. The coating comprises the following components in percentage by mass: a main component 30-40%, a secondary component 15-25%, a binder 10-15%, an anticorrosion additive 15-25%, and the balance is water. The main component comprises white corundum powder, red corundum powder and microcrystalline corundum powder. The secondary component comprises secondary component 1 and secondary component 2. The secondary component 1 comprises phlogopite, biotite and sodium mica. The secondary component 2 comprises potassium feldspar, sodium feldspar and calcium feldspar. The binder is sodium water glass and potassium water glass. The aluminum electrolysis carbon anode anti-oxidation anticorrosion coating is simple and convenient to prepare. After being coated on the carbon anode, the carbon anode in operation can be well protected. The weight loss rate of each sample is only about 0.8%, and the problems of anode oxidation and coating corrosion are effectively reduced.

The invention relates to an anode foil and a preparation method thereof. The preparation method comprises the following steps: sequentially carrying out pretreatment, primary formation treatment and secondary formation treatment on a corrosion foil; wherein the pretreatment comprises steam oxidation pretreatment, and high-temperature steam is adopted for carrying out steam oxidation treatment on the etched foil; the first-stage formation treatment comprises the step of carrying out first anodic oxidation on the pretreated corrosion foil in a first electrolyte; the first electrolyte comprises organic acid and organic ammonium salt; the second-stage formation treatment comprises the step of carrying out second anodic oxidation on the corroded foil subjected to the first-stage formation treatment in a second electrolyte, wherein the second electrolyte comprises organic acid and phosphate. The surface oxidation film performance of the anode foil is improved, the leakage current of the anode foil is reduced, and the service life of the anode foil is prolonged.

The invention relates to a method for regulating and controlling superconducting transition temperature. The method comprises the following steps: providing a substrate; magnetron sputtering is carried out on the substrate to form a superconducting thin film, and the superconducting thin film comprises the substrate and a superconducting thin film layer located on the substrate; and the target superconducting thin film is placed in an anodic oxidation tank to be oxidized with target constant voltage or target constant current, electrolyte is stored in the anodic oxidation tank, a superconducting thin film layer of the superconducting thin film faces a cathode, and a substrate of the superconducting thin film is fixed to an anode. At least the superconducting thin film can be placed in an anodic oxidation tank to be oxidized at target constant voltage or target constant current, the generation thickness of an oxidation layer and the proportion between the oxidation layer and an unoxidized layer are controlled, and then the temperature of the superconducting thin film is regulated and controlled.

The application provides a metal-based needle tube and a preparation method and application thereof, and relates to the technical field of detection, and aims to solve the technical problem that the sampling needle is made of rigid material and cannot detect the solution property of the sample or reagent at the same time. The preparation method of the metal-based needle tube comprises the following steps: anodizing the needle tube as an anode in an electrolyte, taking a conductive wire as a cathode, arranging the conductive wire in the needle tube, and arranging the conductive wire coaxially with the needle tube; the voltage of anodization is 0.1V-50V, the temperature is 15-80 DEG C, and the time is 1-600 min; coating the wall surface of the needle tube after anodization with a uniform polymer film; the polymer is one of polytetrafluoroethylene, polydimethylsiloxane and polyethylene; and the metal is one of titanium, copper and stainless steel. The needle tube is used for sampling and detecting the concentration, type or pH value of the liquid at the same time.

The invention discloses anode slurry as well as a preparation method and application thereof. The invention provides a preparation method of anode slurry C. The preparation method comprises the following steps: step 1, mixing an iridium catalyst, perfluorinated sulfonic acid resin dispersion liquid and a solvent to obtain slurry A; step 2, adding a platinum precursor into the slurry A to obtain slurry B; and step 3, the slurry B reacts at 50-90 DEG C to prepare anode slurry C. According to the method, the water-soluble platinum precursor is directly added into the anodized iridium oxide catalyst slurry, so that the dispersity of platinum and the capability of eliminating hydrogen in oxygen of platinum per unit mass are remarkably improved.

This invention provides an electropolymer-modified aluminum current collector, its preparation method, and its application, relating to the field of aluminum foil current collector technology. By modifying the current collector surface, it primarily addresses the interface problem between the current collector and the active material, thereby improving the performance of lithium-ion batteries. This invention uses an aluminum foil current collector as the anode, a graphite plate as the cathode, and an acidic solution of a conductive polymer monomer as the electrolyte. Anodizing electropolymerization is performed using a constant current or constant voltage method, followed by washing and drying to obtain the electropolymer-modified aluminum current collector. The conductive polymer monomer is at least one of aniline, thiophene, and pyrrole; the concentration of the conductive polymer monomer in the electrolyte is 0.1-1.0 mol / L; and the polymerization time is 5-10 min. This invention effectively reduces the contact resistance between the current collector and the active material, improves the bonding strength between the coating and the substrate, and enhances the corrosion resistance of the current collector, showing promising application prospects.

The invention relates to a method for sealing a nickel-free zirconium salt oxide film on an aluminum alloy profile, which mainly solves the problem of poor sealing effect in the prior art. The method comprises the following steps: 1) suspending the aluminum profile in sequence through a suspension assembly and subjecting it to surface pretreatments of sandblasting, oil removal, water washing, alkali washing, water washing, pickling, and water washing; 2) suspending the aluminum profile in an electrolytic tank through the suspension assembly and performing anodizing; 3) air-drying the aluminum profile treated in step 2; 4) suspending the aluminum profile in a sealing tank through the suspension assembly, using an aluminum electrode as an anode and the aluminum profile to be sealed as a cathode and performing pulse power treatment for 25 minutes, while the aluminum profile vibrates and a sealing liquid is circulated and sprayed through a jet steam engine, so that the sealing tank is in an aerated state and the electrolyte temperature is maintained at 70 to 110 degrees Celsius; and 5) cleaning and drying the aluminum profile treated in step 4.

A method for preparing a NiCo-MOF anodic oxidation catalyst for matching cathode CO2 reduction is disclosed, belonging to the technical fields of electrocatalysis and fine chemical synthesis. Based on ion etching in a hydrothermal environment, a NiCo-MOF electrocatalyst with a uniform nanoflower-like structure was grown on the surface of substrates such as nickel foam. Benefiting from the modulating effect of cobalt on the electron cloud distribution of the active center nickel, this catalyst exhibits excellent catalytic activity for glycerol oxidation and glucose oxidation, achieving up to 400 mA cm⁻¹ at only 1.398 V. ‑2 The industrial-grade current density has a Tafel slope of only 42.3 mV dec. ‑1 The catalyst exhibited no performance degradation after 100 hours of stable cycling, with a Faradaic efficiency exceeding 90% for the main product, formic acid. This catalyst demonstrates a simple synthesis method, low cost, good catalytic activity and selectivity, and excellent stability, showing promising industrial application prospects in the co-production of formate using small-molecule electro-oxidation coupled with carbon dioxide electroreduction.