513 results about "Nickel ions" patented technology

The invention discloses a nickel-containing etching wastewater treatment process, which belongs to the technical field of environmental protection, and comprises a raw water regulating tank, a pH pre-regulating tank, a heterogeneous catalytic oxidation tower, a neutralization coagulation tank, an inclined tube sedimentation tank and a clean water tank which are connected in sequence. According to the process, under the neutral condition, a catalyst loaded with cobalt manganese oxide is used for activating sodium hydrogen persulfate, high-activity sulfate free radicals are generated, a Ni-EDTA complex structure is fractured in a targeted mode, free nickel ions are released in situ, organic ligands are synchronously mineralized, and the adding amount of sodium hydrogen persulfate is dynamically adjusted through a clean water pool closed-loop control system; and high-purity nickel hydroxide precipitate is generated through alkaline precipitation and coagulation, so that efficient solid-liquid separation is realized. The treatment process disclosed by the invention is compact in flow and stable in operation, effectively solves the problems of difficult complex breaking, low nickel removal efficiency, high sludge toxicity, difficult resource recovery and the like when the EDTA complex nickel wastewater is treated by a traditional method, realizes closed-loop recovery of nickel resources, and has the remarkable advantages of low cost, high efficiency and environmental friendliness.

The invention relates to a preparation method of a nickel ion doped modified ferric sodium pyrophosphate positive electrode material, and belongs to the technical field of sodium ion battery positive electrode materials. The nickel ion doped modified ferric sodium pyrophosphate positive electrode material is prepared by adopting an integrated process system of liquid phase uniform mixing, spray granulation and precise segmented calcination. According to the process system, atomic-scale uniform doping of nickel ions and a specific microstructure of a precursor are realized through spray drying, and a plurality of inherent key technical problems of low electronic conductivity, low ion diffusion rate, impurity phase generation and the like of an NFPP material are solved together through a synergistic effect with a subsequent calcining process; furthermore, the discharge capacity of the ferric sodium phosphate pyrophosphate composite material at high rate is improved, so that the battery has relatively high cycling stability.

To provide a positive electrode active material for a lithium ion secondary battery, having high capacity and being excellent in charging and discharging cycle characteristic.SOLUTION: A positive electrode active material contains lithium, cobalt, nickel, aluminum, and oxygen. The spin density due to any one or more of divalent nickel ions, trivalent nickel ions, divalent cobalt ions, and tetravalent cobalt ions is in a predetermined range. The positive electrode active material further contains magnesium. The suitable magnesium concentration is expressed by the concentration relative to cobalt. The positive electrode active material preferably contains fluorine additionally.SELECTED DRAWING: Figure 1

The invention provides a preparation method of a nickel-based composite oxygen evolution anode for alkalescent electrolyte. According to the invention, nickel-based alloy is used as substrates, two same substrates are respectively used as a working electrode and an auxiliary electrode, two-electrode system electrochemical oxidation reduction treatment at room temperature is carried out in a mixed solution of phosphate, carbonate and chloride, and two reconstructed nickel-based composite oxygen evolution electrodes are obtained at the same time. In the electrochemical oxidation process, nickel ions and other metal (Fe, Co, Cr and Mn) ions are dissolved out from the nickel-based alloy under the etching assistance of chloride ions; in the electrochemical reduction process, water on the electrode is reduced to form hydroxyl. Under continuous oxidation reduction, substance reconstruction is carried out to generate a composite catalyst layer of phosphate, carbonate and hydroxide of nickel and other metals, so that not only can the oxygen evolution activity be improved, but also metal dissolution and corrosion passivation when the catalyst is used in a weakly alkaline solution can be inhibited, and the durability of the electrode is greatly improved.

The invention belongs to the technical field of conductive microsphere preparation, and particularly relates to a surface-roughened nickel-plated conductive microsphere and a preparation method and application thereof. The preparation method comprises the following steps: carrying out pretreatment to enable the surfaces of the polymer microspheres to contain nickel ions, reducing the nickel ions into nickel nanoparticles, activating the microspheres and carrying out chemical plating. According to the invention, the specific surface area of the conductive microspheres is increased by reducing the nickel nanoparticles on the surfaces of the microspheres, a large amount of impurities cannot be generated among the microspheres, and adhesion among the microspheres can be effectively prevented. According to the prepared conductive microspheres, the plating layer and the polystyrene microspheres are firmly combined, and the risk that the conductivity is reduced due to the fact that the surface of the plating layer falls off is reduced. The preparation method is safe, environment-friendly, simple, convenient and suitable for industrial production requirements.

The invention discloses an alkaline electrolyzed water diaphragm based on nickel oxyhydroxide and a preparation method and application of the alkaline electrolyzed water diaphragm, and relates to the technical field of composite diaphragms.The alkaline electrolyzed water diaphragm is prepared through a phase inversion method, and nanometer nickel oxyhydroxide NiOOH particles are selected as inorganic nanometer filler; the mass percent of the nickel oxyhydroxide in the membrane casting solution is 15-30%. A strong chemical bond formed by nickel ions and hydroxyl in the hydroxyl nickel oxide crystal endows the material with excellent structural stability, and the material shows excellent solubility resistance, hydrolysis resistance and structural collapse resistance in a strong alkaline electrolysis environment and can tolerate high-concentration OH <-> erosion for a long time; meanwhile, the intrinsic high-oxidation-resistance characteristic is achieved.

The invention discloses a process for treating nickel wastewater containing nickel acetate cleaning water and nickel acetate concentrated water, which comprises the following steps: S1, filtering nickel wastewater, S2, carrying out primary concentration treatment, S3, carrying out secondary concentration treatment, S4, treating by a sodium metaaluminate method, S5, carrying out collaborative filtration treatment, and S6, discharging RO (Reverse Osmosis) produced water up to the standard. The method comprises the following steps: primarily enriching nickel ions by adopting primary nickel concentration treatment and secondary nickel concentration treatment, adding a sodium metaaluminate solution into a mixed solution, enabling the pH value of the mixed solution to be 8-12, enabling the nickel ions to react with hydroxyl ions to generate a nickel hydroxide precipitate, adding a sulfuric acid solution to adjust the pH value of the mixed solution back to 6.5-7.5, hydrolyzing sodium metaaluminate to generate an aluminum hydroxide precipitate, and carrying out secondary nickel concentration treatment on the aluminum hydroxide precipitate; aluminum hydroxide adsorbs nickel hydroxide to form a composite precipitate, aluminum ions and nickel ions are subjected to a competitive complexation reaction, and a flocculating agent is added into a mixed solution to form a flocculent precipitate, so that the reaction time is short, the nickel content in the nickel sludge can be greatly increased, the treatment period can be shortened, and the operation cost can be reduced.

The application provides a preparation method of an octene aldehyde liquid-phase hydrogenation catalyst, and steps of the method comprise the following: (1) preparing a salt solution containing nickel ions, copper ions and aluminum ions, heating to 40-80 DEG C, adding a basic precipitator to react, and aging after the reaction is completed; (2) uniformly mixing the precipitate obtained after aging in step (1) with silica sol to obtain slurry; (3) washing and filtering the slurry, then adding alkali metal carbonate powder and boron nitride solid, uniformly mixing, and then shaping, drying and calcining to obtain the octene aldehyde liquid-phase hydrogenation catalyst. The preparation method is simple, green, environmentally friendly and easy to industrialize, the conversion rate and selectivity of the obtained octene aldehyde liquid-phase hydrogenation catalyst are high, and the catalyst is stable in performance and durable.

The invention relates to a modified molecular sieve and a preparation method and application thereof, and the preparation method comprises the following steps: alkali modification: obtaining an alkali modified ultra-stable Y molecular sieve; performing nickel ion exchange for many times to obtain a nickel ion loaded ultra-stable Y molecular sieve; and carrying out cerium ion exchange to obtain the nickel-cerium double-loaded ultra-stable Y molecular sieve. On the basis of an ultra-stable Y-type molecular sieve, a novel modified molecular sieve is prepared through further modification treatment, so that the adsorption performance of the novel modified molecular sieve on organic sulfides such as mercaptan and thioether in oily sewage and oily waste gas is improved, and a more efficient, economical and environment-friendly technical solution is provided for VOCs emission treatment in the petrochemical industry; the method has important application value and market prospect.

The invention provides a method for recycling battery-grade manganese sulfate from manganese-containing feed liquid. The method comprises the following steps: (1) carrying out resin adsorption on a manganese-containing feed liquid to obtain a nickel-cobalt adsorbate and an adsorbed feed liquid; (2) sequentially carrying out extraction treatment and reverse extraction treatment on the adsorbed feed liquid to obtain a solution containing manganese sulfate and an organic phase after reverse extraction; (3) carrying out evaporative crystallization on the solution containing manganese sulfate to obtain battery-grade manganese sulfate; positive ions in the manganese-containing feed liquid comprise manganese ions, nickel ions, cobalt ions, calcium ions and magnesium ions, and negative ions in the manganese-containing feed liquid comprise sulfate ions; an extraction agent adopted in the extraction treatment process comprises an HBL116 extraction agent. According to the method disclosed by the invention, metal oxidation hydrolysis cannot be caused to generate a third phase, the extraction process is stable, enrichment of a high-concentration manganese sulfate solution is realized, high-purity manganese sulfate crystals with qualified impurities are obtained, and efficient recovery of manganese in a high-calcium-magnesium feed liquid system can be realized; and a complicated recovery process is not needed, so that the cost is lower.

The invention belongs to the technical field of hydrometallurgy, and particularly relates to a method for separating nickel and cobalt from a nickel-containing solution and preparing nickel salt, which comprises the following steps: 1) chelating and precipitating impurity metal ions in the nickel-containing solution by using ammonium polyphosphate with the polymerization degree of more than 1000 as an impurity removal agent, thereby removing copper, iron, zinc and aluminum to obtain an impurity-removed solution; 2) extracting the impurity-removed solution by using a diluent, alpha-hydroxyoxime, carboxylic acid and alkyl alcohol as an extraction organic phase to obtain a nickel-loaded organic phase; 3) washing the nickel-loaded organic phase by using nickel-containing washing water; and (4) reverse extraction is conducted on the washed nickel-loaded organic phase through reverse extraction liquid containing acid and nickel ions, nickel-rich liquid is obtained after reverse extraction is completed, nickel salt in the nickel-rich liquid is crystallized, and nickel salt solids are obtained after phase separation. According to the method, nickel is selectively extracted through the compound extraction system after impurity removal, the extraction rate of nickel reaches up to 99.8%, nickel is separated from metal ions such as cobalt and lithium, and the method is simple in process, low in equipment manufacturing cost and low in manufacturing cost.

The invention discloses a nanorod-shaped Ni / Ni3S2 / VN electro-catalytic material and a preparation method and application thereof.The preparation method comprises the steps that firstly, a nickel source is loaded on the surface of bacterial cellulose, and a Ni / Ni3S2 / VN electro-catalytic hydrogen evolution material with the nanorod-shaped morphology is prepared through a solid-phase sintering method; the bacterial cellulose is a pure natural biomass element, has no pollution to the environment, is green and environment-friendly, has a large number of carboxyl functional groups on the surface, can effectively complex free nickel ions in a solution as a template agent, and keeps good catalytic stability after being carbonized into carbon nanofibers, and Ni3S2 and VN are compounded, so that the catalytic performance of the carbon nanofibers is improved. According to the preparation method, a nanorod-shaped heterostructure is formed, part of Ni metal is reduced, all the components have a synergistic effect, the excellent electro-catalytic hydrogen evolution performance is shown in an alkaline environment, the preparation process is green, simple and convenient, and reaction conditions are easy to control.

The invention belongs to the technical field of electro-catalytic materials, and particularly relates to a metal cation doped polymetallic sulfide nanosphere as well as a preparation method and application thereof. The metal cation doped polymetallic sulfide nanosphere is formed by polymetallic sulfide nanosheets, and polymetallic sulfide comprises molybdenum sulfide and metal cation doped cobalt sulfide; the metal cations comprise nickel ions and / or manganese ions. The material has excellent bifunctional catalytic performance of hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), shows excellent water electrolysis performance, and can effectively improve the catalytic efficiency of water electrolysis.

The invention discloses a hollow carbon sphere loaded Ni / NiO heterojunction material, which is prepared by the following steps: firstly preparing a solid carbon sphere loaded Ni / NiO heterojunction material SiO2-NC-Ni / NiO by a template sacrifice method, and then removing a SiO2 template by an alkaline etching method to obtain the hollow carbon sphere loaded Ni / NiO heterojunction material NC-Ni / NiO. The preparation method comprises the following steps: 1, preparing PDA coated silicon dioxide solid spheres; 2, preparing PDA coated silicon dioxide solid sphere loaded nickel ions; 3, preparing a carbon-coated silicon dioxide solid sphere loaded nickel-nickel oxide heterojunction; and 4, preparing the hollow carbon sphere loaded nickel-nickel oxide heterojunction. The invention relates to a preparation method of an NC-Ni / NiO doped lithium aluminum hydride hydrogen storage material, which comprises the following steps of: mixing NC-Ni / NiO serving as a catalyst and lithium aluminum hydride under an argon condition, and performing ball milling to obtain LiAlH4-NC-Ni / NiO. When the material is used as a hydrogen storage material, the initial dehydrogenation temperature is 60-70 DEG C, and the hydrogen desorption amount is 7.0-7.2 wt.%.

The invention provides a continuous high-phosphorus chemical nickel plating method, which comprises the following steps: preparing a chemical plating solution containing nickel salt, a complexing agent and an additive, adding a first reducing agent and a second reducing agent into the plating solution according to a mass ratio of (3-5): (1-2), the second reducing agent is one or more of lithium aluminum hydride, sodium borohydride, propionic acid or succinic acid; and the PH value of the plating solution needs to be adjusted to 4.5-5.5, the temperature of the plating solution is controlled to be 80-90 DEG C, and then continuous plating operation is conducted. The first reducing agent can stably release active phosphorus atoms at a low temperature, a rich phosphorus source is provided for the plating layer, and it is guaranteed that the plating layer reaches the high phosphorus content; the second reducing agent can effectively promote the reduction deposition process of nickel ions, and the deposition rate is increased. The two reducing agent components cooperate with each other, so that the plating solution keeps high stability, fluctuation of the plating solution components is effectively inhibited, and the consistency and stability of the plating layer quality are obviously improved.

The invention provides a zinc-doped sodium ion battery positive electrode precursor as well as a preparation method and application thereof, and relates to the technical field of sodium ion batteries. Specifically, a first solution containing nickel salt, ferrite, manganese salt, zinc salt, an antioxidant and a first complexing agent is prepared; preparing a second solution containing a precipitant; preparing a third solution containing a second complexing agent; wherein the first complexing agent is used for complexing zinc ions and ferrous ions, and the second complexing agent is used for complexing nickel ions and manganese ions; and then through a co-precipitation reaction, controlling nucleation and growth of the precursor material according to the pH and ammonium concentration of a reaction system, and then carrying out post-treatment to obtain the zinc-doped sodium-ion battery positive electrode precursor. The precursor prepared by the method has the advantages of high tap density, high specific surface area, uniform components and the like, the particle sphericity and morphology uniformity are good, the preparation method is simple and easy to implement, the stability is good, and the method has a good batch prospect.

The invention belongs to the technical field of electroplating wastewater treatment, and particularly relates to acidic electroplating wastewater treatment equipment and process based on combination of Fenton oxidation and acid-resistant nanofiltration membrane separation. Considering that the acidic nickel plating wastewater not only can provide acidic conditions, but also has ferrous ions, based on this, the acidic nickel plating wastewater is used as a raw material and is mixed with the ferrous ions and hydrogen peroxide for a Fenton reaction, and then iron ions and nickel ions are separated by adopting a PP precision filter and an anti-high-turbidity ultrafiltration system. According to the method, iron ions are recycled after being reduced by an iron reduction reactor, nickel ions are separated by adopting an acid-resistant nanofiltration system, and the obtained nickel ions are subjected to electroplating and water recycling again, so that the technical defects existing in the traditional nickel plating wastewater treatment are overcome, and the utilization of the acidic nickel plating wastewater is realized.

The invention relates to a method for inhibiting oxidation-reduction reaction of a nickel oxide / perovskite interface in a perovskite solar cell. The method comprises the following specific steps: S1, firstly, preparing a compact base nickel oxide film on a conductive substrate; s2, heating an acetone solvent to obtain acetone steam, and performing reductive treatment on the substrate nickel oxide film to achieve the purpose of passivating high-valence nickel ions on the surface of nickel oxide; and S3, continuing to deposit a perovskite precursor on the nickel oxide thin film subjected to acetone steam treatment, and performing heating annealing treatment to obtain a high-quality perovskite thin film. Through the method, surface defects of the nickel oxide thin film can be passivated, the energy level structure of the nickel oxide thin film can be regulated and controlled, the stability of the perovskite thin film is improved, and the photoelectric property of a solar cell based on the thin film is also remarkably improved. The method is simple and convenient to operate, low in raw material price and suitable for industrial large-scale production.

The utility model discloses an electroplating nickel sulfate recovery processing device, which relates to the technical field of electroplating liquid recovery and comprises a processing barrel, a partition plate is fixedly arranged in the middle of the inner side of the processing barrel, a fixing sleeve is fixedly arranged in the middle of the partition plate, and an inserting rod is inserted into the fixing sleeve. The partition plate is arranged in the treatment barrel, the interior of the treatment barrel can be divided into two parts through the partition plate, the two parts can achieve absorption of nickel ions by resin and regeneration and reduction of the resin respectively, the fixing sleeve is arranged in the middle of the partition plate, and the rotatable inserting rod is arranged in the fixing sleeve in an inserted mode. A storage box is arranged at the top end of the insertion rod through a supporting plate and a movable rod, resin can be stored in the storage box, and switching of the resin between the nickel ion absorption state and the regeneration reduction state can be achieved by switching the position of the storage box in the treatment barrel, so that continuous recovery treatment of the device on electroplated nickel sulfate can be achieved.

The invention relates to the technical field of battery management, in particular to a sodium nickel chloride battery pack balanced charging and discharging control method based on an intelligent algorithm. The method comprises the steps of obtaining working parameters of each single battery of a battery pack and controlling the temperature to a preset range; detecting sodium and nickel ion concentration parameters of each single battery, calculating a sodium ion transmission rate, and determining a charge-discharge rate parameter; and calculating a state-of-charge value and a state-of-health value based on the working parameters and the rate parameters, and determining charging and discharging time and strategies, thereby realizing balanced charging and discharging of the battery pack. The method can improve the charge-discharge efficiency of the sodium nickel chloride battery pack, prolong the service life and ensure the safe and stable operation of the battery pack.

The invention relates to a method for recovering nickel and cobalt from a mixture of compounds of these metals from the recycling of spent lithium-ion batteries, comprising the following steps: a) digestion of a mixture of nickel and cobalt compounds in a solution containing hydrochloric acid having a concentration of more than 25 mass %, in case the mixture of nickel and cobalt compounds is solid; or bringing the mixture of nickel and cobalt compounds to a hydrochloric acid concentration of more than 25 mass %, in case the mixture of nickel and cobalt compounds is a solution; b) activation of ion-exchange resin in a column using hydrochloric acid; c) passing the solution from step a) through the column filled with the ion-exchange resin activated in step b); d) washing the column with hydrochloric acid having a concentration of more than 25 mass % in order to wash out the remaining solution containing nickel ions; e) washing the column with hydrochloric acid having a concentration of less than 10 mass % in order to wash out cobalt ions; f) extraction distillation of the nickel ion solution obtained in step d) in hydrochloric acid using sulfuric(VI) acid; phase separation in a spent liquid; recycling of a filtrate to distillation; dissolution of nickel sulfate(VI) and electrolysis in order to recover metallic nickel; g) extraction distillation of the cobalt ion solution obtained in step e) in hydrochloric acid using sulfuric(VI) acid; phase separation in a spent liquid; recycling of a filtrate to distillation; dissolution of cobalt sulfate(VI) and electrolysis in order to recover metallic cobalt; h) extraction distillation of the solution of diluted hydrochloric acid with nickel and cobalt ions obtained after the activation of the ion-exchange resin in step b), using sulfuric(VI) acid; phase separation in a spent liquid; recycling of a filtrate to distillation; recycling of a mixture of the formed cobalt sulfate(VI) and nickel sulfate(VI) to digestion in step a); i) rectification of diluted hydrochloric acid having a concentration below the azeotropic concentration (approx. 20.2 mass % at atmospheric pressure) formed in extraction distillation processes in steps f)-h) in order to concentrate hydrochloric acid and recover and recycle of water; recycling of concentrated hydrochloric acid to extraction distillation in steps f)-h).

The present application provides a perovskite solar cell, a preparation method, a photovoltaic system, a power generation device, and an electric device. The perovskite solar cell comprises a first electrode, a charge extraction layer, a first passivation layer, a perovskite layer, and a second electrode which are sequentially stacked. The material of the charge extraction layer comprises a nickel oxide, the material of the first passivation layer comprises a reducing agent, and the reduction potential of the reducing agent is less than that of Ni3+. In the perovskite solar cell, by means of introduction of the first passivation layer, nickel ions with a valence of +3 or higher in the charge extraction layer can be reduced, reducing the degradation of a perovskite material, improving the stability of the perovskite layer, thereby prolonging the service life of the perovskite solar cell.

A microbial cellulose material is provided comprising an acid, a metal ion, and microbial cellulose. The acid can be a polyphenol. The metal ion can be selected from a group consisting of iron ion (Fe2+), iron ion (Fe3+), copper ion (Cu2+), aluminum ion (Al3+), magnesium ion (Mg2+), zinc ion (Zn2+), nickel ion (Ni2+), germanium ion (Ge4+), titanium (Ti4+), molybdenum (Mo6+) and tungsten ion (W6+). The microbial cellulose can be a bioplasticized microbial cellulose.

A method for recovering at least cobalt of valuable metals, cobalt and nickel, from an acidic solution obtained by subjecting waste containing positive electrode materials for lithium ion secondary batteries to a wet process, the acidic solution comprising cobalt ions, nickel ions and impurities, the method including: a first extraction step for Co recovery, the first extraction step being for extracting cobalt ions by solvent extraction from the acidic solution and stripping the cobalt ions; and a second extraction step for Co recovery, the second extraction step being for extracting cobalt ions by solvent extraction from a stripped solution obtained in the first extraction step for Co recovery and stripping the cobalt ions, wherein the first extraction step for Co recovery includes: a solvent extraction process for extracting cobalt ions in the acidic solution into a solvent; a scrubbing process for scrubbing the solvent that has extracted the cobalt ions; and a stripping process for stripping the cobalt ions in the solvent after the scrubbing into a solution.

The present disclosure belongs to the field of resource recovery. The present disclosure provides a method for separating and recovering nickel and iron from a nickel-iron material. The method comprises: carrying out acid leaching on a nickel-iron material, adjusting a leachate to remove chromium and aluminum impurities, adding a reducing agent to the impurity-removed solution to reduce iron ions, and then using a resin to adsorb nickel ions from the solution to obtain a saturated resin and an iron-containing solution, thereby realizing the separation of nickel from iron; and desorbing the saturated resin having adsorbed the nickel ions to obtain a nickel-containing solution, wherein the nickel-containing solution and the iron-containing solution can undergo subsequent treatment to obtain nickel and iron products. Compared with a conventional recovery process, the present disclosure involves using the resin, so that not only is the nickel concentration enriched, thereby separating iron from nickel in a high-selectivity manner, but also a complex impurity removal and purification process is omitted, and the resin can be recycled after being desorbed, so that the technological process is greatly economized, and the recovery cost is reduced.

The invention discloses a device and a method for electrochemically treating chemical nickel plating waste liquid. The device comprises a pH regulating tank, an electrolytic tank, a reaction tank, a sedimentation tank and a clean water tank which are sequentially connected through pipelines, stirring devices are arranged in the pH adjusting tank and the reaction tank; an electrode mechanism and an air stirring coil pipe are arranged in the electrolytic tank, and the air stirring coil pipe is arranged below the electrode mechanism and is connected with the air compressor through a pipeline; the electrode mechanism is electrically connected with the direct-current power supply; an inclined tube filler is arranged in the sedimentation tank; a water flow control valve and a water pump are arranged on a pipeline between every two adjacent pool bodies; the method comprises the steps that under the action of a direct-current electric field, organic pollutants are removed through anode electrooxidation, nickel ions are recycled through cathode electroreduction deposition, and clear water reaching the standard is obtained after chemical treatment and precipitation separation. Under the electrolysis condition of 2-5 h, the nickel ion removal rate reaches 99.9%, the concentration is reduced to be smaller than 1 ppm, COD is remarkably reduced, and efficient purification and resource utilization of the chemical nickel plating waste liquid are achieved.

The invention discloses a recombinant escherichia coli high-efficiency soluble expression semeglutide 9-37 amino peptide and a purification method, and belongs to the technical field of gene engineering. According to the invention, fusion protein mRNA folding is optimized, hairpin structures are reduced, and efficient soluble expression of fusion protein in escherichia coli is realized. The fusion protein is provided with an SUMO label and an enterokinase cleavage site, the fusion protein is purified through nickel ion affinity chromatography, the fusion protein is subjected to enterokinase specific recognition cleavage and then subjected to nickel ion affinity chromatography and gel filtration chromatography separation, Arg34GLP-1 (9-37) with the purity larger than or equal to 95% is obtained, the wet thallus amount is 150-200 g / L after fermentation culture, and the pure protein yield is 2-3 g / L. The invention provides a fusion expression and rapid purification method of the semeglutide Arg34GLP-1 (9-37) polypeptide, and a solid early-stage foundation is laid for industrial, efficient, green and low-cost preparation of the semeglutide.

The invention provides a copper-doped and coated sodium electric precursor as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out first coprecipitation reaction on a mixed metal salt solution, a precipitator solution and a complexing agent solution; the mixed metal salt solution comprises nickel ions, iron ions, manganese ions and copper ions; after the first coprecipitation reaction is finished, the pH value of the system is increased, a copper coating preparation stage is started, a second coprecipitation reaction continues to be carried out, after the second coprecipitation reaction is finished, the mixed metal salt solution is replaced with a copper salt solution, the pH value of the system is reduced, a third coprecipitation reaction continues to be carried out, and the copper-doped and coated sodium electric precursor is obtained. According to the preparation method, micro particles are introduced in the coating preparation stage, Cu < 2 + > is brought into a particle system in the stage that large particles adsorb the micro particles to grow, uniform coating is achieved, and finally the precursor which is uniform in element distribution, uniform in structure distribution, high in tap density, high in specific surface area and free of hardening is obtained.

The invention provides a laser-induced surface metallized glass fiber reinforced polyether-ether-ketone modified material and a preparation method thereof. The laser-induced surface metallized glass fiber reinforced polyether-ether-ketone modified material is prepared from the following components in percentage by weight: 39%-69.5% of PEEK resin, 20%-40% of low-dielectric flat glass fiber, 5%-10% of low-dielectric filler, 5%-10% of Cu-Ni coordination compound and 0.5%-1% of antioxidant. According to the invention, the Cu-Ni coordination compound is added into the PEEK modified material, then the PEEK modified material is subjected to laser induction treatment with a specific wave band, reducing cuprous ions or nickel ions are obtained on the surface layer of the PEEK modified material, and then the reducing cuprous ions or nickel ions are catalytically reduced into metal atoms through an electroplating process, so that the metal layer is embedded into the PEEK base material, and the binding force between the metal coating and the PEEK base material is improved.

The present disclosure relates to double layered hydroxide-type compounds comprising both di- and tri-valent nickel ions, and the use of such compounds in electrodes for energy storage device in addition to a previously developed electrode using Fe2+ and Fe3+“green rusts related compounds”.