361 results about "Acid etching" patented technology

The invention discloses a compatible molybdenum-aluminum mixed acid etching solution which comprises the following components in percentage by mass: 4%-7% of nitric acid, 55%-65% of phosphoric acid, 17%-28% of acetic acid, 0.5%-3% of an oxidizing additive, 0.05%-5% of a metal corrosion inhibitor and 10%-20% of deionized water, and the oxidizing additive is ceric nitrate and at least one selected from sodium nitrate, potassium nitrate and ammonium nitrate; the etching liquid does not contain other organic components except for organic carboxylic acid and organic carboxylate. According to the compatible molybdenum-aluminum mixed acid etching solution, on the basis that ceric nitrate is introduced, the content of nitric acid is reduced, the nitrate ion concentration is increased by adding nitrate, the overall oxidation performance of an etching solution system is improved, the etching rate ratio of different metals is adjusted, CD-Bias is reduced, the etching dip angles of a molybdenum single layer and a molybdenum-aluminum laminated layer are controlled to be kept at 20-50 degrees, and the problem of aluminum thorns is solved. The invention further discloses a molybdenum-aluminum etching method based on the compatible molybdenum-aluminum mixed acid etching solution.

The invention relates to the technical field of lithium battery negative electrode materials, and discloses a preparation method of a lithium battery silicon-carbon composite negative electrode material with high cycle stability, and the preparation method comprises the following steps: carrying out magnesiothermic reduction and acid etching on micron silicon powder and magnesium powder to prepare porous silicon particles; growing carbon nanotubes on the surfaces of the porous silicon particles and in pore channels in situ to construct a three-dimensional conductive network; styrene butadiene rubber and glucose are adopted as a composite carbon source to coat the product, and a composite carbon layer is formed through drying and gradient carbonization; and finally grinding and sieving the carbonized product. According to the preparation method disclosed by the invention, pores are constructed in micron silicon, and the micron silicon is externally coated with the composite carbon layer with flexibility and rigidity, so that the volume expansion of silicon is effectively buffered; the in-situ grown carbon nanotube network provides a stable electron conduction path; the micron-sized substrate reduces the specific surface area of the material and improves the first coulombic efficiency. Therefore, the prepared negative electrode material has high cycling stability and excellent rate capability.

The invention provides a double-dosage-form copper acid etching solution as well as a preparation method and application thereof. The double-dosage-form copper acid etching solution comprises an agent A and an agent B, the agent A comprises the following components in parts by weight: 15-20 parts of an oxidizing agent, 4-7 parts of an organic acid chelating agent, 0.1-0.5 part of inorganic acid, 0.5-2 parts of alkali, 1-2 parts of a surfactant and 0.01-0.1 part of a metal corrosion inhibitor; the agent B is prepared from the following components in parts by weight: 25 to 30 parts of organic acid chelating agent, 0.2 to 0.5 part of inorganic acid, 15 to 20 parts of alkali, 1 to 2 parts of surfactant and 0.1 to 0.3 part of metal corrosion inhibitor. The double-agent copper acid etching solution provided by the invention can be compatible with etching of Cu / Mo and Cu / MTD film layers, can be compatible with etching of film layers with different thicknesses, and is long in service life, low in CD Bias, free of chamfer cracks, good in residue, small in taper variation and short in etching time.

The invention discloses a method for leaching waste lithium battery positive electrode powder by using intestinal flora in a neutral environment, and belongs to the technical field of resource recycling, the method comprises the following steps: step 1, a pretreatment link, the pretreatment link comprises the following process links, and each link has no sequence: (1) preparation of battery powder, (2) acquisition of intestinal flora, and (3) preparation of a culture medium; 2, domesticating the flora; and 3, valuable metal in the waste battery powder is leached out. According to the method, the intestinal flora is applied to the biological leaching of the waste LIBs positive electrode powder, so that the dependence of traditional strong acidophilic bacteria on an extremely low pH condition is broken through, and the environmental harm is greatly reduced; according to the method, inorganic acid does not need to be added, the pH value of a reaction system is stabilized within the nearly neutral range of 7.8-8.2, equipment loss caused by acid etching is reduced, reagent consumption for subsequent metal recovery and neutralization treatment is reduced, and remarkable economic benefits and environmental benefits are achieved.

The invention discloses a long-acting stable filling agent for phosphorite mining and a preparation method and application thereof, the long-acting stable filling agent takes cement, slag powder, phosphogypsum and fly ash as matrix components, and is supplemented with additives such as a nano modified liquid, a retarder and an early strength agent. The 3d compressive strength reaches 4.6-5.5 MPa, the 28d compressive strength reaches 13.5-15.5 MPa, the 90d strength retention rate in a simulated acid environment is larger than or equal to 84%, the volume shrinkage rate is smaller than or equal to 0.5%, and the early strength and the excellent long-term acid-resistant stability are both high. Through a synergistic effect of a nano-micron composite structure, pores are filled with nano particles and secondary hydration is promoted, basalt fibers are bridged to resist cracking, and nano montmorillonite blocks acid etching, so that unification of high early strength and long-acting acid resistance is realized. The material is simple and convenient in preparation process, can be efficiently used for mining and filling of phosphorite mountains, and meets the requirements of rapid support and long-term acid medium erosion resistance.

This invention discloses a TiC-Ti3C2T x The preparation method of MXene composite material includes: acid etching of Ti3AlC2 ceramic powder, washing of etching products, centrifugation, and ultrasonic layering to obtain single-layer and few-layer Ti3C2T. x Colloidal solution, then freeze-dried to obtain monolayer and few-layer Ti3C2T x Powder; TiC powder, dried Ti3C2T x TiC-Ti3C2T was prepared by high-shear emulsification and mixing of powder and polytetrafluoroethylene dissolved in anhydrous ethanol, followed by rotary evaporation, drying, and spark plasma sintering. x MXene composite material. This invention solves the problem of reinforcement dispersion in TiC ceramic matrix and addresses the issue of Ti3C2T under high-temperature sintering conditions. x The MXene phase transformation and oxidation problems are addressed, and the TiC matrix is ​​strengthened and toughened by inducing matrix grain refinement, crack deflection, crack bridging, and lamellar pull-out, thereby improving bending strength and fracture toughness.

The invention discloses a titanium dioxide nanorod / dissimilar metal MOFs heterojunction material and a preparation method and application thereof, and belongs to the technical field of photoelectrochemistry seawater hydrogen production. Soluble nickel salt, soluble cadmium salt or soluble cobalt salt and ammonium molybdate are adopted as metal sources, spherical dissimilar metal MOFs grow on the surface of a TiO2 nanorod in situ, and the TiO2 nanorod / dissimilar metal MOFs heterojunction material is prepared. According to the present invention, the oxygen deficiency-regulated dissimilar metal MOFs material (i.e., the titanium dioxide nanorod / dissimilar metal MOFs heterojunction material) is obtained through subsequent acid etching and annealing treatment, the material is subjected to in-situ reconstruction during the OER process to spontaneously form the active hydroxide (NiOOH) of anion protection (MoO4 < 2->), and the excellent stability is represented; only small Faraday efficiency loss (1.2-2.3%) occurs in a high chloride ion environment (3.5 wt%-7wt% of NaCl), and an extensible path is provided for industrial-scale solar hydrogen production by using seawater.

The application discloses a kind of MXene modified polyimide nanofiber composite membranes and its preparation method and application, the method is prepared by acid etching method MXene nanosheet and polyamide acid molecular chain form strong hydrogen bond and coordination effect, significantly enhance interface binding force.MXene effectively transmits load, inhibits crack propagation, substantially improves the tensile strength and toughness of composite membrane, while extending the diffusion path of particulate matter, combined with the electrostatic adsorption effect produced by MXene itself conductivity, significantly improve the interception efficiency of PM0.3~PM2.5 fine particulate matter.The thermal imidization process ensures that PI matrix is completely converted into high-temperature-resistant structure, giving the material the ability to operate stably at high temperature for a long time.The composite membrane realizes four breakthroughs of high strength, high efficiency, low resistance and high dust capacity, providing a new solution for high-performance air filtration under harsh working conditions.

The invention belongs to the technical field of metallurgy and material engineering, and particularly relates to a method for stably and clearly displaying a macrostructure of a cast-rolled aluminum blank based on effective acid etching time. According to the method, the effective acid etching time in the detection of the grain sizes of the macrostructures of different cast-rolled aluminum billet samples under the condition that the acid liquor is repeatedly used is obtained, and the acid etching degree of the cast-rolled aluminum billet can be judged by using the effective acid etching time as a certain acid liquor formula and a certain acid liquor temperature to improve a reliable criterion, so that fixed parameters for stably and clearly displaying the macrostructures of the cast-rolled aluminum billet are obtained. The method has the meanings of improving the repeated use effect of the acid liquor, enhancing the macrostructure image acquisition effect, improving the comparison reliability of the grain size rating result, detecting and manufacturing the automatic intelligence level and the like.

The invention belongs to the technical field of electrocatalytic materials and electrolytic hydrogen production, and particularly relates to a composite electrocatalyst and a preparation method and application thereof. According to the preparation method of the Ni single active center composite electrocatalyst based on the high-rubidium high-silicon lithium ore base as the carrier, uniform loading and efficient activation of the Ni single active center on the ore carrier are achieved through the steps of pretreatment, acid etching activation, lithiation regulation and control, Ni active solution preparation, solvothermal loading, roasting shaping and the like on the high-rubidium high-silicon lithium ore. When the catalyst is applied to urea electrolytic hydrogen production, the catalyst has the advantages of low initial potential, low overpotential and high stability.

A method for treating the surface of a dental implant to impart surface roughness is disclosed. The method for treating the surface of a dental implant according to the present invention includes a first surface treatment step of forming grooves in a regular pattern on the entire or part of the implant surface using a laser, and a second surface treatment step of imparting roughness to the grooves and their surroundings through acid etching. The first surface treatment step may include a first laser treatment step of processing a plurality of first grooves that are continuous in a first direction and spaced apart in a second direction, and a second laser treatment step of processing a plurality of second grooves that are continuous in the second direction and spaced apart in the first direction, forming craters at each intersection between the first and second grooves.

The invention belongs to the technical field of printed circuit boards, and discloses a printed circuit board manufacturing method and a printed circuit board, and the method comprises the steps: covering the surface of a plated circuit board with a positive dry film, and forming a circuit board with the positive dry film; wherein the positive dry film is provided with a pattern to be plated with nickel and gold, and the pattern to be plated with nickel and gold is a pattern which coincides with a pre-designed circuit pattern and is compensated and pre-enlarged; performing exposure, development and micro-etching treatment on the circuit board with the positive dry film to form a circuit board with a concave position to be plated with nickel and gold; carrying out nickel and gold electroplating treatment on the circuit board with the concave position to be plated with nickel and gold, and removing a film to obtain a circuit board with a nickel and gold plating layer; covering a negative dry film on the surface of the circuit board with the nickel-gold plating layer to form a circuit board with a negative dry film; performing exposure, development, acid etching and film stripping on the circuit board with the negative dry film to obtain a printed circuit board; according to the invention, the quality and reliability of the printed circuit board can be remarkably improved while the nickel-gold saving ratio is effectively improved.

The application discloses a sludge-based activated carbon loaded monatomic catalyst, a preparation method thereof and application thereof in activating peracetic acid to degrade organic pollutants in water. The catalyst comprises a nitrogen-doped sludge activated carbon porous carrier in a graphene appearance and Fe monatomic atoms loaded on the nitrogen-doped sludge activated carbon porous carrier, wherein the Fe monatomic atoms have 2Fe-N4 and Fe2N6 double coordination structures. The preparation method comprises the following steps: S1, after wastewater sludge is dried, crushed, sieved, mixed with a ZnCl2 solution, and then solid-liquid separation is performed to obtain the solid, the solid is dried, first pyrolysis is performed in an inert atmosphere, acid washing purification is performed, and water washing is performed, a sludge-based porous activated carbon is obtained; S2, the sludge-based porous activated carbon, melamine and Fe(NO3)3.9H2O are uniformly mixed in a solvent, and then dried to obtain a precursor solid; and S3, the precursor solid is subjected to second pyrolysis in an inert atmosphere, acid etching, water washing and drying.

The invention provides an acid etching line etching cylinder tail gas treatment system and a treatment device, and particularly relates to the technical field of etching line tail gas treatment.The acid etching line etching cylinder tail gas treatment system comprises an etching cylinder and an air draft assembly used for extracting tail gas in the etching cylinder; the absorption assembly is used for absorbing effective components in tail gas, the storage assembly is used for storing absorption liquid, the monitoring assembly is used for monitoring the state of the absorption liquid, the blending assembly is used for blending the absorption liquid, and the recycling assembly is used for returning the processed absorption liquid to the etching cylinder. A complete closed-loop system is formed by the monitoring assembly, the blending assembly and the recycling assembly, low-copper electrolyte of the etching liquid copper recovery system is used for replacing traditional alkali liquor to absorb tail gas, the defects that effective components are wasted, alkali liquor consumption is large and chlorine-containing waste water is additionally generated due to the fact that tail gas is directly discharged in a traditional process are overcome, and recycling of the effective components in the tail gas is achieved. Meanwhile, the consumption of alkali liquor and the discharge amount of chlorine-containing wastewater are reduced.

This invention relates to the field of batteries, and more particularly to a silver-plated copper layer on the top cover electrode of a lithium-ion battery and its preparation method. This invention employs nanoscale precision etching, which, compared to the micron-level roughness achieved by ordinary acid etching, increases the "mechanical interlocking" area with the gradient layer by 3-5 times, improving adhesion at the substrate level. This invention achieves a linear gradient transition of copper content from 90% to 10%, rather than the "stepwise compositional change" of existing gradient processes, eliminating abrupt compositional changes and stress concentration at the copper-silver interface. After 1000 cycles of temperature from -20°C to 60°C, the silver-plated copper layer on the electrode shows no peeling or cracking, exhibiting twice the cycle weather resistance of existing processes, fully adapting to the harsh high and low temperature cycling scenarios of power batteries. This invention uses nano-etching + a gradient transition layer to eliminate the risk of interface oxidation. During the pure silver layer electroplating process, nitrogen deoxygenation and precise temperature control achieve dense deposition, resulting in a coating free of pinholes with a porosity ≤0.5 pinholes / cm². 2 This effectively reduces contact resistance.

The invention discloses a rare earth-nickel-based AB2 type hydrogen storage alloy material and a preparation method thereof, and relates to the field of solid hydrogen storage materials, the alloy comprises rare earth elements La, Ce and Sc and transition metals Ni, Mn, Al and Zr according to a specific proportion, the raw materials are melted through electric arc melting and are subjected to alloying reaction to form a master alloy ingot, and the master alloy ingot is subjected to high-temperature sintering to obtain the rare earth-nickel-based AB2 type hydrogen storage alloy material. Non-equilibrium solidification is achieved through single-roller rapid quenching, a thin strip of a metastable-state structure is obtained, grain arrangement and second-phase precipitation are regulated and controlled through gradient annealing, finally, a surface oxide layer is removed through crushing and acid etching, and hydrogen storage alloy powder is obtained through vacuum drying. An AB2 type Laves phase main body structure is formed through multi-element rare earth solid solution, grain coarsening is inhibited by combining a rapid quenching process, a microstructure is optimized through gradient annealing, the hydrogen storage capacity, hydrogen absorption dynamic performance and cycling stability of the alloy are synergistically improved, and the alloy is suitable for preparation and application of an efficient hydrogen storage material.

According to the preparation method, a proper amount of transition metal is introduced, the transition metal can be combined with precious metal, the use of the precious metal can be obviously reduced, synergistic interaction is achieved, the catalytic activity is improved, in addition, the ultrasonic-assisted cavitation effect is introduced, and polyhydric alcohol serves as a solvent and a reducing agent, so that the catalytic activity of the catalyst is improved. Under the synergistic effect of the stabilizer and the adjusting aid, agglomeration of nanoparticles can be effectively prevented, uniform reduction and nucleation of metal ions are greatly promoted, noble metal atoms and transition metal atoms are co-reduced to form atomic-scale dispersed alloy nano crystal nucleuses, and alloy nanoparticles with small and uniform particle sizes are formed; compared with the prior art, more specific surfaces can expose more active sites, the utilization rate of noble metal atoms can be increased, finally, after acid etching, a core-shell structure is formed through temperature programming reduction, the catalyst has better stability, the catalyst can still keep extremely high activity and stability after long-term operation, and the service life is remarkably prolonged.

The utility model discloses a kind of PCB acid etching waste liquid recycling device, it is related to etching liquid circulation technical field, including buffer box, the lower surface of the buffer box is fixedly connected with electrolytic chamber and electrodeposition chamber, the left side of the electrodeposition chamber is fixedly installed with conveying pump, the input end of the conveying pump is communicated with drainage tube and is connected to the inside of the electrolytic chamber, the output end of the conveying pump is communicated with infusion tube and is connected to the inside of the electrodeposition chamber, the lower side of the inner wall of the buffer box is fixedly installed with multiple servo motors.In the utility model, the oxidation ability of copper ions is reduced by electrolysis, ensuring that the etching liquid can be used continuously, and then the excess copper ions in the etching liquid are recovered by electrodeposition cathode and electrodeposition anode, thereby ensuring the effect of the etching liquid while recovering copper ions, reducing costs, and further ensuring that the etching liquid can be recycled while reducing costs and increasing efficiency.

The invention provides a nickel electrode with a multi-level structure and a preparation method thereof. The preparation method mainly comprises the following steps: preparing a bottom-layer concave-convex substrate structure by mixed acid dipping, and forming a middle layer and a catalyst layer structure by surface heterogeneous growth. According to the method, tight combination of the catalyst layer and the substrate is taken as a guide, the uneven nickel metal substrate is obtained through mixed acid etching aiming at the problem that the catalyst is prone to falling off, and a highly rough surface is provided for in-situ growth of a subsequent columnar middle layer. The nickel metal substrate and the nanoflower layer catalyst are connected through the middle layer, the binding force of the catalyst and the substrate is effectively increased, the catalyst is prevented from falling off, and industrial stable water electrolysis is achieved. The surface of the synthesized nickel electrode with the multi-level structure has excellent performance stability, the overpotential is only increased by 8 mV when the nickel electrode runs for 1000 hours under the current density of 500 mA cm <-2 >, and only 1.83 V is needed when the nickel electrode is in an electrolytic bath.

The invention relates to the technical field of oil and gas field development, and particularly discloses an environment-friendly nano microemulsion retarded acid and a preparation method thereof, the environment-friendly nano microemulsion retarded acid comprises: a water phase, which is an acid-containing aqueous solution; the modified porous nano silicon dioxide powder has strong adsorbability and response release property; the retarder is formed by polymerizing acrylamide, dimethyl diallyl ammonium chloride, N-vinyl pyrrolidone, perfluoroalkyl acrylate and perfluoropolyether acrylate under the action of an initiator; an oil phase; an emulsifier; an emulsion stabilizer; and an iron ion stabilizer. The invention has the beneficial effects of high acid utilization rate, high acidity, multi-stage retarding, good acid etching effect, small damage, high acidification transformation efficiency, good safety and environmental protection property, 100-300nm emulsion particle size, good stability and no demulsification and layering after being placed at room temperature for 30 days, and the effective components of the acid liquor are wrapped by the microemulsion.

The invention discloses a well periphery flow capacity calculation method based on a hybrid grid. The well periphery flow capacity calculation method comprises the following steps that S1, the hybrid grid is established according to well periphery heterogeneous characteristics; s2, at the beginning of the time step, preliminarily determining fluid pressure in a shaft, and for a large-scale grid, calculating fluid pressure distribution in a matrix rock mass by adopting a seepage numerical model; s3, preliminarily determining the concentration of acid liquor in a shaft, adopting the pressure and the concentration in the shaft as inlet boundary conditions, adopting the recorded large-scale grid boundary fluid pressure as outlet boundary conditions, calculating the growth process of acid etching wormholes in the small-scale grid system by utilizing a wormhole model, and obtaining the change of a porosity field in the small-scale grid system; s4, calculating physical property parameters of the large-scale grid after earthworm hole growth in a single time step; and S5, repeating the steps S2-S4, and carrying out next time step calculation until analog calculation of the whole injection process is completed. According to the invention, the optimal balance between the calculation efficiency and the simulation precision is realized.

The invention discloses a method for accurately measuring the phase content in stainless steel. The method is suitable for stainless steel containing at least one phase of ferrite, austenite, cementite and martensite. The method comprises the following steps: S1, cutting, grinding and polishing a stainless steel sample to obtain a bright surface; s2, pre-judging the type and the number of contained phases through metallographic structure observation in combination with component analysis and a heat treatment process; and S3, directional detection is conducted according to the pre-judgment result, ferrite is measured through metallographic software after being subjected to electrolytic corrosion through a KOH electrolyte, austenite is measured through an X-ray diffraction technology, cementite is measured through a laser confocal microscope after being subjected to acid etching, and martensite is obtained by subtracting the sum of the measured phase content by 100%. The method integrates various technical advantages, is simple and convenient to operate, wide in detection range and high in precision, and can provide accurate data support for stainless steel process optimization and material development.

The invention relates to the technical field of metal surface treatment, in particular to a treatment process of a hydrophilic implant. According to the process, the implant is sequentially subjected to sand blasting and acid etching, compound acid solution activation, gradient alkaline neutralization, multi-stage ultrasonic cleaning, low-temperature plasma modification, nitrogen protection ultraviolet radiation and normal saline sealing storage treatment. Through a multi-step synergistic effect, a stable hydrophilic micro-nano structure is constructed on the surface of the implant, a large number of Ti-OH hydrophilic groups are formed, carbon and hydrogen atom adsorption is effectively isolated, and the problems that the hydrophilicity of an existing implant is prone to loss, osteoblast climbing is difficult, and the healing period is long are solved. The implant treated by the process is durable and stable in hydrophilicity, the healing period after implantation is shortened to about one month, the planting survival rate is remarkably increased, the process is green and safe, and industrial production can be realized.

The utility model relates to the technical field of etching liquid recycling, in particular to an impurity filtering device for recycling acid etching liquid. According to the technical scheme, the device comprises a shell, a tank body, a liquid inlet pipe and a mounting frame, wherein the bottom end face of the shell is sleeved with a collecting box; a filter screen box is sleeved in the liquid inlet pipe; a driving mechanism is mounted on the top end surface of the tank body, and a mounting frame is mounted on an output shaft of the driving mechanism through a rotating shaft; a filter box is mounted at one end, deviating from the rotating shaft, of the mounting frame; a connecting shaft is arranged in the filter box, a scraping plate and a stirring rod are installed on the connecting shaft, a clamping block is installed on the filter screen box, the clamping block is slidably connected to the liquid inlet pipe in a sleeving mode, connecting frames are welded to the two ends of the outer surface of the tank body, and the ends, away from the tank body, of the connecting frames are welded into the shell. The etching liquid recycling device meets the requirement for recycling the etching liquid, centrifugal separation can be adopted during recycling, and liquid precipitation is prevented from affecting filtering.

This application provides a method for regenerating ternary cathode materials based on acid etching and molten salt lithium replenishment, as well as the regenerated electrode material and battery. The method includes the following steps: pretreating the failed ternary battery cathode material with an organic acid solution; mixing the pretreated failed ternary battery cathode material, dopant, and lithium-containing molten salt, and performing a first-stage low-temperature molten salt heat treatment at a first specified temperature; further subjecting the material after the first-stage low-temperature molten salt heat treatment to a second-stage high-temperature heat treatment at a second specified temperature for 2-4 hours; and washing and drying the product after the second-stage high-temperature heat treatment to obtain the regenerated ternary cathode material. The wet acid etching process selectively removes rock salt phase impurities and contaminants from the electrode material surface, achieving interface cleaning and activation; the molten salt method for lithium replenishment using multi-element synergistic doping introduces multiple beneficial elements for bulk phase doping while replenishing lithium, thereby simultaneously strengthening the material's crystal structure and interface stability.

The invention discloses a low-loss ultrathin high-speed transmission FFC wire rod and a preparation method thereof. The FFC wire rod is a low-loss medium system formed by fluorinated polyimide, a liquid crystal polymer, fine PTFE powder and SiO2 / Al2O3 microspheres subjected to surface fluorination treatment, and comprises an ultra-low profile copper foil conductor layer, an embedded patterned grounding grid layer, a top shielding layer and a protective layer. The embedded grounding grid is formed through precise casting and photoetching electroplating, the trapezoidal cross section differential line pair is formed through acid etching, and the embedded grounding grid is manufactured through the technologies of multi-layer hot-pressing lamination, online impedance detection and compensation correction and the like. The total thickness of the wire rod is less than or equal to 0.10 mm, the differential characteristic impedance is 85 + / -5 ohm or 100 + / -5 ohm, the insertion loss is less than or equal to 0.79 dB / in under 10GHz, the near-end crosstalk is less than or equal to-35dB, the bending life is greater than or equal to 1 million times, and the shielding effectiveness is greater than or equal to 60dB, so that the problems that the existing FFC wire rod is large in loss, large in impedance fluctuation and serious in crosstalk under high frequency and is poor in mechanical reliability under an ultrathin structure are solved.

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

The invention discloses an amorphous copper-trithiocyanuric acid coordination polymer as well as a preparation method and application thereof, and belongs to the technical field of functional materials and biomimetic catalysis. The polymer does not have a long-range ordered structure, and the copper element takes cuprous as a main existence valence state. The preparation method comprises the following steps: carrying out surface coordination reaction on cuprous oxide serving as a template and trithiocyanuric acid to form a core-shell intermediate, removing the template through acid etching, and reconstructing to obtain the final amorphous coordination polymer. The material simultaneously has high-efficiency peroxidase-like and glutathione-like oxidase double-enzyme activity, can synergistically catalyze hydrogen peroxide to generate hydroxyl radicals and consume glutathione, and can remarkably kill cancer cells by inducing a copper death mechanism in a tumor microenvironment. The material is unique in structure and excellent in catalytic performance, the preparation method is simple, convenient and controllable, and the material has wide application prospects in the fields of tumor catalytic treatment, bionic sensing and the like.

The application provides a kind of iron cobalt bimetallic anchoring porous carbon electrode and its preparation method, the load of cobalt in iron cobalt bimetallic anchoring porous carbon electrode is 0.5-2.5wt%, and the load of iron is 0.1-2.5wt%.Among them, the preparation method comprises the following steps: step S1, providing cobalt atom anchoring carbon electrode;Step S2, after acid etching, the cobalt atom anchoring carbon electrode is heat treated, and a cobalt atom anchoring porous carbon electrode is obtained;Step S3, the cobalt atom anchoring porous carbon electrode is immersed in an iron precursor solution and heat treated, and an iron cobalt bimetallic anchoring porous carbon electrode is obtained.The iron cobalt bimetallic anchoring porous carbon electrode according to the embodiment of the application can significantly improve the electrocatalytic activity of 3-electron oxygen reduction to ·OH, effectively reduce the dissolution of metal ions, and avoid the recovery problem of electrocatalyst, thereby more efficiently and greenly oxidizing and degrading new pollutants.