318 results about "Cobalt chloride" patented technology

The invention discloses an organic plugging agent, a preparation method thereof and application of the organic plugging agent to inhibition of SAGD steam cavity edge water invasion. The organic plugging agent is prepared from the following raw materials: epoxy resin, a curing agent, nano aerogel, mineral fibers, plant fibers, a reactive diluent, a heat stabilizer and water, the epoxy resin is at least one of glycidyl amine epoxy resin and alicyclic epoxy resin; the curing agent is at least one of amino resin, dicyandiamide and hydrazide; the heat stabilizer is at least one of thiourea, sodium thiosulfate and cobalt chloride. The organic plugging agent is excellent in high temperature resistance, mineralization resistance and plugging performance, the organic plugging agent, nitrogen and an inorganic plugging agent are injected into a water plugging system of an SAGD steam cavity edge well in a slug mode, the organic plugging agent is applied to SAGD high-temperature and high-leakage well conditions, and the SAGD production effect can be effectively improved.

The invention discloses a preparation method and application of a Co-doped FeOOH catalyst, and the preparation method comprises the following steps: adding ferric trichloride and cobalt chloride hexahydrate into an organic solvent, and ultrasonically mixing and dissolving to form a uniformly mixed solution; adding sodium nitrate into the mixed solution, and stirring at room temperature to obtain a uniform mixed solution; dropwise adding a hydrochloric acid solution into the mixed solution, transferring the mixed solution into a high-pressure reaction kettle with a polytetrafluoroethylene lining, and carrying out hydrothermal reaction; after the reaction is finished, cooling to room temperature, centrifuging the obtained precipitate with ethanol and ultrapure water, washing, and carrying out vacuum drying; and cooling the product obtained after drying to room temperature to obtain the product Co-doped FeOOH catalyst. The invention provides a catalyst suitable for high-performance electrochemical ammonia synthesis for the first time, preferably a 6% Co-FeOOH catalyst, and the optimal ammonia catalysis effect is achieved.

The invention discloses a high-strength basalt fiber drainage pipe and a production process thereof, belonging to the field of drainage pipes. The invention discloses a high-strength basalt fiber drainage pipe and a production process thereof. The inner layer and the outer layer are both composited with basalt fiber reinforcement material and high-performance polyester resin. The basalt fiber has high strength characteristics and provides good structural strength for the drainage pipe. Then, a mixture of styrene-butadiene rubber and polyurethane is used in the middle layer to form a leak-proof self-healing polymer rubber layer, so that when it is pierced by foreign objects and leaks, it can automatically repair itself by utilizing the fluidity and high viscosity of the mixture, thereby enhancing the reliability and safety of the drainage pipe and reducing the probability of leakage of the drainage pipe. A cobalt chloride component is also added to the outer layer as a leakage detection component. When leakage occurs, the cobalt chloride at the leakage port will absorb water and change color, so that the leakage can be detected more intuitively, quickly and accurately, and the problem can be discovered and handled in a timely manner.

The invention discloses cobaltosic oxide loaded ruthenium dioxide fibers as well as a preparation method and application thereof, and relates to the technical field of electrolyzed water. The preparation method comprises the following steps: carrying out wet spinning on sodium alginate and calcium chloride to prepare calcium alginate fibers, then sequentially reacting the calcium alginate fibers with hydrochloric acid and cobalt chloride, calcining to obtain cobaltosic oxide fibers, reacting the cobaltosic oxide fibers with ruthenium trichloride, and carbonizing to obtain the cobaltosic oxide loaded ruthenium dioxide fibers. According to the invention, Co3O4 is utilized to transfer electrons to RuO2, so that the valence state of ruthenium is reduced, and dissolution of high-valence ruthenium in an acidic OER process can be inhibited, so that the OER activity under an acidic medium is improved, and the stability can be improved. Specifically, in a 0.1 M HClO4 electrolyte, under the current density of 10 mA / cm < 2 >, the overpotential is 220 mV, and the voltage is basically unchanged after continuous testing for 100 h.

The invention belongs to the technical field of catalyst preparation, and particularly relates to a preparation method of a high-dispersion platinum group noble metal-based catalyst, which comprises the following steps: preparing a porous rod-like cobaltosic oxide carrier material, cleaning with deionized water, drying, and roasting for 4-8 hours; dissolving chloroplatinic acid or platinum chloride in deionized water to form a noble metal solution; soaking the treated cobaltosic oxide carrier in a noble metal solution, taking out the carrier from the solution after soaking is completed, filtering, cleaning, drying, and roasting for 4-6 hours in an inert gas atmosphere; and keeping the temperature and reducing for 2-4 hours in a hydrogen atmosphere. When the porous rodlike cobaltosic oxide carrier material is prepared, firstly, a cobalt chloride solution is poured into the lower part of the double-layer cavity for stirring, a urea solution drips into the cavity through a spray head in the stirring process, a stirring barrel is turned over after stirring is completed, the stirred solution flows out and is filtered, the cobalt chloride solution and the urea solution are continuously added into the double-layer cavity for stirring and mixing, and the porous rodlike cobaltosic oxide carrier material is prepared. Therefore, the porous rod-like cobalt oxide solvent material is efficiently prepared.

The invention discloses a doped iron-based MOFs nano-enzyme and application thereof in detection of ascorbic acid, and relates to the technical field of biomolecule detection. Ferrous chloride, cobalt chloride and dimethylimidazole are adopted as raw materials, the doped iron-based MOFs nano-enzyme is prepared through a hydrothermal reaction, and the doped iron-based MOFs nano-enzyme can be used for constructing a colorimetric detection platform for detecting ascorbic acid. The conductivity of the material is enhanced by introducing cobalt, and the electron transfer efficiency is improved, so that the catalytic activity is improved. The combination of iron and cobalt can promote the interaction between metals, and the synergistic effect can reduce the migration and loss of metal ions, thereby enhancing the catalytic activity and structural stability of the nano-enzyme. When the doped iron-based MOFs nano-enzyme prepared by the invention is used for detecting ascorbic acid, the detection limit of the doped iron-based MOFs nano-enzyme is 0.5671 [mu] M.

The invention relates to the field of electro-catalysis and nano materials, in particular to a preparation method and application of a basic cobalt chloride and ferrocobalt spinel composite electrode material. According to the method, an alkaline low-water high-viscosity alcohol reaction system is adopted, and basic cobalt chloride and a ferrocobalt spinel material are promoted to be deposited on a nickel net at the same time under the high-temperature condition. The prepared basic cobalt chloride and ferrocobalt spinel composite electrode has high catalytic activity and stability, shows good electrochemical performance in a seawater environment, and can be used as a high-activity and high-stability seawater electrolysis hydrogen production electrode.

The invention belongs to the technical field of electro-catalytic materials, and particularly relates to a preparation method and application of a P-CuCo / CF electro-catalytic material. The preparation method comprises the following steps: firstly, carrying out electro-deposition by taking pretreated foamy copper as a conductive substrate and taking a cobalt chloride hexahydrate aqueous solution as an electrolyte, after an electroplated layer is formed on the foamy copper, washing and drying, putting the material into a hydrogen reduction furnace for reduction to obtain CuCo / CF, respectively putting NaH2PO2 and the obtained CuCo / CF into the upstream and downstream of a tubular furnace, and carrying out vacuum drying to obtain the CuCo / CF / NaH2PO2 / CuCo / CF composite material. And calcining and phosphorizing in a nitrogen atmosphere to finally obtain the P-CuCo / CF electro-catalytic material. The P-CuCo / CF electro-catalysis material obtained by the invention has relatively good catalysis efficiency in electro-catalysis nitrate reduction synthesis of ammonia, and under the voltage of-0.9 V vs.Ag / AgCl and in 0.1 M KNO3, the Faraday efficiency on ammonia reaches 97.33% through continuous electrolysis for 1 hour.

The invention relates to the technical field of hard alloy, and particularly discloses a hard alloy material containing graphene oxide and a preparation method thereof.The preparation method comprises the following steps that S1, a graphene suspension aqueous solution, a cobalt chloride aqueous solution and an ammonium oxalate aqueous solution are prepared; s2, mixing the graphene suspension aqueous solution with a cobalt chloride aqueous solution to obtain a GO / CoCl2. 6H2O mixed aqueous solution, adding an ammonium oxalate aqueous solution, uniformly mixing, heating, and carrying out a hydrothermal reaction to obtain a GO / CoC2O4 precursor; s3, placing the GO / CoC2O4 precursor in a reducing atmosphere, and heating and calcining the GO / CoC2O4 precursor to obtain GO / Co composite powder; and S4, the GO / Co composite powder and the tungsten-carbon powder are mixed and sintered, and the hard alloy material is obtained. According to the preparation method, graphene oxide is uniformly dispersed in cobalt powder through a hydrothermal reaction in combination with a high-heat reduction calcination treatment mode, GO / Co composite powder is prepared, then the GO / Co composite powder and hard alloy powder are subjected to compound sintering, and the problems that graphene is not uniformly dispersed in hard alloy and is easy to agglomerate can be effectively solved.

The invention provides a carbon-supported platinum-cobalt-copper multifunctional alloy catalyst and a preparation method and application thereof, and belongs to the technical field of energy materials. Wherein the nanocarbon carrier solution is mixed with a chloroplatinic acid solution, a cobalt chloride solution and a copper chloride solution, a sodium hydroxide aqueous solution is added to adjust the pH value, ultrasonic dispersion and stirring are performed to obtain turbid liquid, and the molar ratio of platinum ions to cobalt ions to copper ions is 2: (0.5-1): (0.5-1); then, putting the turbid liquid into a reaction kettle, and reacting at 120-250 DEG C for 1-6 hours to obtain a black colloidal solution; then filtering, washing and drying the black colloidal solution to obtain black powder; and finally, carrying out acid treatment on the black powder, and grinding to obtain the carbon-loaded platinum-cobalt-copper multifunctional alloy catalyst. The catalyst is used for catalyzing an oxygen reduction reaction of a cathode in a hydrogen fuel cell and / or a methanol fuel cell, and / or catalyzing a methanol oxidation reaction of an anode in a direct methanol fuel cell.

The invention relates to a two-dimensional bimetal organic nanosheet loaded silicon-carbon composite material and a preparation method and application thereof, and belongs to the technical field of preparation of lithium ion power battery electrode materials.Firstly, dopamine is polymerized on the surface of silicon powder in situ, and the silicon-carbon composite material (Si-C) is obtained after high-temperature calcination; then, terephthalic acid, cobalt chloride hexahydrate, nickel chloride hexahydrate and Si-C are added into a mixed solution prepared from N, N-dimethylformamide, deionized water and ethyl alcohol; and after dissolving, injecting triethylamine and stirring, sealing the container after light gray precipitates appear, continuously performing ultrasonic treatment, performing centrifugal washing for multiple times, and drying at room temperature to obtain the product Si (at) C / Ni-Co-BDC composite material. Compared with pure silicon powder and silicon-carbon composite materials, the composite material Si (at) C / Ni-Co-BDC has better structural stability and rich redox active sites, the lithium storage performance of the material can be further optimized, and the composite material has better application prospects.

The invention belongs to the technical field of catalyst preparation, and particularly relates to a preparation method and application of a catalyst for synthesizing deuterated ammonia. The preparation method comprises the following steps: S1, adding molybdenum carbide into a hydrofluoric acid solution, magnetically stirring for 72-96 hours, washing and centrifuging with water, and repeatedly washing and centrifuging until the pH (Potential of Hydrogen) gt; 5, obtaining acid etching molybdenum carbide; s2, adding an alkaline solution into the acid-etched molybdenum carbide, carrying out ultrasonic treatment at room temperature until the pH value of the solution is 7, and then carrying out centrifugal solid-liquid separation to obtain layered molybdenum carbide; and S3, mixing the cobalt chloride hexahydrate solution and molybdenum carbide at 400-600 DEG C to react for 3-6 hours, and performing vacuum freeze drying to obtain the Co / molybdenum carbide catalyst. The catalyst prepared by the method is applied to synthesis of deuterated ammonia by reaction of nitrogen and deuterium gas, and is low in cost, pollution-free, high in conversion rate and simple to prepare.

The invention relates to the technical field of electrocatalysts, in particular to a ruthenium cobalt oxide self-supporting electrode and a preparation method and application thereof. A titanium mesh is used as a substrate, a hydrochloric acid aqueous solution of ruthenium chloride and cobalt chloride grows ruthenium dioxide nanoparticles in situ on the titanium mesh through a hydrothermal method, cobalt atoms are doped into ruthenium dioxide crystal lattices, and a self-supporting electrode of cobalt doped ruthenium dioxide is formed and used as an electrocatalyst for oxygen evolution reaction and hydrogen evolution reaction. A catalytic material grows in situ on a three-dimensional porous conductive substrate, a self-supporting catalyst is prepared, a binder is not needed, the specific surface area is larger, more active sites can be exposed, the activity and stability of the material are further improved, low-electronegativity cobalt provides electrons for ruthenium through adjustment of doped elements, excessive oxidation of ruthenium is inhibited, and the performance of the catalyst is improved. The activity and stability of the catalyst are improved to a certain extent, so that the catalyst has good performance under high current density, is prepared by using a hydrothermal method, is simple and controllable in process, and can be widely applied to water electrolysis devices.

The invention discloses a cobalt phthalocyanine / pyridine nitrogen skeleton substituted copper phthalocyanine / pitch coke activated carbon composite catalytic material and a preparation method and application thereof.The method comprises the steps that 1, pyridine-2, 3-dicarboxylic acid, urea, ammonium molybdate, copper chloride dihydrate and pitch coke activated carbon are mixed, and a mixture A is obtained; 2, carrying out heat preservation on the mixture A at 100-180 DEG C, and then carrying out heat preservation at 200-350 DEG C to obtain a product B; 3, sequentially grinding, soaking, cleaning and drying the product B to obtain pyridine nitrogen skeleton substituted copper phthalocyanine / pitch coke activated carbon; 4, mixing phthalic anhydride, urea, ammonium molybdate, cobalt chloride hexahydrate and pyridine nitrogen skeleton substituted copper phthalocyanine / pitch coke activated carbon to obtain a mixture C; 5, the mixture C is subjected to heat preservation at 100-180 DEG C and then subjected to heat preservation at 200-350 DEG C, and a product D is obtained; 6, the product D is sequentially ground, soaked, cleaned and dried, the cobalt phthalocyanine / pyridine nitrogen skeleton substituted copper phthalocyanine / pitch coke activated carbon composite catalytic material is obtained, the purity is high, the discharging time of a Li / SOCl2 battery is prolonged, and the voltage of the Li / SOCl2 battery is increased.

The invention discloses a method for producing chlorinated electrodeposited cobalt from a high-iron-silicon raw material. The method comprises the working procedures of slurrying dissolution, pre-removal of iron and silicon from the raw material, iron removal, extraction and impurity removal, nickel-cobalt separation, purification and impurity removal, electrodeposition and the like. According to the method, industrial sulfuric acid, sodium hydrogen sulfite, sodium carbonate, alkali and the like are added, proper reaction temperature, reaction time, reaction node pH and other factors are controlled, a pure cobalt chloride solution is obtained, and electrodeposited cobalt is obtained after electrodeposition. The cobalt content of the iron slag is lower than 0.2%; nickel sulfate contains less than or equal to 0.05 g / L of cobalt; the copper chloride after extraction contains less than or equal to 0.5 g / L of cobalt, more than or equal to 7g / L of copper and more than or equal to 10g / L of manganese. Precious metals such as copper and manganese are enriched in a copper chloride solution for external application. The method has the advantages that the cobalt leaching rate is high, the grade rate of finished product cobalt is high, and iron and silicon in the raw materials are effectively removed.

The invention discloses a modified cobaltosic oxide catalyst and a preparation method and application thereof.The catalyst comprises a carrier foamed nickel, tungsten and chlorine co-doped cobaltosic oxide nanosheets W and Cl-Co3O4, the tungsten and chlorine co-doped cobaltosic oxide nanosheets W and the Cl-Co3O4 are loaded on the carrier, cobalt chloride and tungsten salt serve as precursors of the catalyst, and the tungsten and chlorine co-doped cobaltosic oxide nanosheets W and the Cl-Co3O4 are loaded on the carrier. The preparation method comprises the following steps: firstly, carrying out a hydrothermal reaction to obtain a nickel foam loaded tungsten-doped basic cobalt chloride nanosheet W-Co2 (OH) 3Cl2, and then carrying out in-situ conversion on the Co2 (OH) 3Cl2 into a nickel foam loaded tungsten and chlorine co-doped cobaltosic oxide nanosheet W, Cl-Co3O4 through calcination. According to the invention, chlorine and tungsten are introduced into cobaltosic oxide, so that the activity and stability of electrocatalytic oxygen evolution are improved, and the cobaltosic oxide is used as an anode catalyst for electrocatalytic seawater decomposition and has excellent activity and stability of electrocatalytic oxygen evolution.

A method and application of CO2 laser-induced synthesis of jujube-shaped heterostructure electrocatalysts, after mixing a sulfur source and distilled water, adding a cobalt source, sodium citrate and a tin source, stirring evenly, the sulfur source is L-cysteine, ammonium thiocyanate, thiourea or sulfur powder, the cobalt source is hexahydrated cobalt nitrate, cobalt chloride and cobalt acetylacetonate, the tin source is stannous chloride, tin tetrachloride or stannous sulfate, hydrothermally reacting in a stainless steel autoclave, washing, centrifuging, vacuum drying at room temperature, obtaining an electrocatalyst precursor; grinding the electrocatalyst precursor into powder, evenly paving, and inducing CO2 laser in an air atmosphere; cooling to room temperature, washing, drying and grinding into powder to obtain a jujube-shaped heterostructure CoS / SnO2@C electrocatalyst. Advantages: simple synthesis, short time consumption, low energy consumption, good dispersibility, excellent ORR and OER electrocatalytic performance, can be used to prepare cathode electrocatalysts for lithium oxygen batteries.

The invention discloses a MnIn2S4-coated Co9S8 heterojunction photocatalyst and a preparation method and application thereof, and belongs to the technical field of photocatalytic materials.The preparation method comprises the steps that firstly, urea, cobalt chloride, water and ethylene glycol serve as raw materials to prepare a Co9S8 precursor; carrying out high-temperature calcination, namely firstly carrying out heat preservation at 350-420 DEG C for 1-2 hours, then heating to 440-460 DEG C, carrying out heat preservation for 3-4 hours, then heating to 580-610 DEG C, and carrying out heat preservation for 3-4 hours, so as to obtain a Co9S8 hollow nanotube; and then growing the MnIn2S4 nanosheet on the surface of the Co9S8 hollow nanotube in situ. The photocatalyst prepared through a hydrothermal-calcination combined strategy has a larger specific surface area and a wider light absorption range, and the migration distance of current carriers can be effectively shortened through a special three-dimensional hollow structure, so that better photocatalytic performance is shown, and the photocatalyst has a large application prospect in the fields of energy and environment.

Provided is a method for separating impurities and cobalt without using an electrolysis process from a cobalt chloride solution containing impurities and producing a high purity cobalt sulfate. The production method for cobalt sulfate includes: a copper removal step (S1) of adding a sulfurizing agent to a cobalt chloride solution containing one or more impurities of copper, zinc, manganese, calcium, and magnesium and generating a precipitate of sulfide of copper to separate to remove copper; a neutralization step (S2) of adding a neutralizer or a carbonation agent to a cobalt chloride solution having undergone through the copper removal step (S1) and generating cobalt hydroxide or basic cobalt carbonate to separate magnesium; a leaching step (S3) of adding sulfuric acid to the cobalt hydroxide or the basic cobalt carbonate to obtain cobalt sulfate solution; and a solvent extraction step (S4) of bringing an organic solvent containing an alkyl phosphoric acid-based extractant to the cobalt sulfate solution and extracting zinc, manganese, and calcium into the organic solvent to separate to remove zinc, manganese, and calcium. These steps are sequentially executed.

The invention provides a preparation method of a high-spin-state cobaltosic oxide anchored ruthenium monatomic composite catalyst, which comprises the following steps: S1, sequentially dissolving cobalt chloride hexahydrate, ruthenium chloride and sodium hydroxide in deionized water, and uniformly stirring to obtain a first mixed solution; s2, sequentially adding the pretreated flexible carbon cloth and the first mixed solution into a hydrothermal reaction kettle for hydrothermal reaction to obtain a first compound; s3, taking out the first compound, washing with deionized water and ethanol, and drying to obtain a second compound; s4, the second compound is placed in an argon environment to be subjected to annealing treatment, and a third compound is obtained; and S5, adding the third compound into a hydrochloric acid solution to carry out etching treatment, washing with deionized water, and drying to obtain the high-spin-state cobaltosic oxide nanosheet anchored ruthenium monatomic composite catalyst. The composite catalyst has a high-spinning porous nanosheet structure, is rich in high-spinning Co < 3 + >, and can be used as a high-performance bifunctional catalyst in a water electrolysis hydrogen evolution reaction and an oxygen evolution reaction.

This utility model discloses a timed liquid replenishment system for cobalt electrolytic deposition, configured in connection with an electrolytic cell. The system includes: a concentration tank, at least one concentration detection unit, a draining component, and a replenishment component. The concentration tank and electrolytic cell are spaced apart for temporary storage of cobalt chloride raw material. The concentration detection unit is built into and connected to the electrolytic cell to detect the concentration of the liquid within it. The draining component is connected to and communicates with the interior of the electrolytic cell to quantitatively drain the liquid. The replenishment component is connected to both the interior of the concentration tank and the interior of the electrolytic cell to quantitatively replenish cobalt chloride raw material. This utility model effectively solves the problem in the prior art where manual control during the replenishment of cobalt chloride solution to the electrolytic cell prevents automated production, thus reducing the yield of electrolytic cobalt.

The invention discloses a preparation method and application of a cobalt-nitrogen-doped mesoporous carbon catalyst, and belongs to the technical field of catalyst preparation, and the preparation method comprises the following steps: mixing and grinding glucose and an SBA-15 mesoporous molecular sieve, pyrolyzing in a nitrogen atmosphere, soaking the obtained product in hydrofluoric acid to remove an SBA-15 template, alternately centrifuging with water and ethanol to obtain a precipitate, and drying to obtain the cobalt-nitrogen-doped mesoporous carbon catalyst. Mesoporous carbon is obtained; the preparation method comprises the following steps: respectively dissolving phenanthroline and cobalt chloride hexahydrate in ethanol, and mixing to form a Co-phen solution; and soaking the obtained mesoporous carbon in a Co-phen solution, evaporating the solvent after soaking, grinding into powder, and carrying out heat treatment in a nitrogen atmosphere to obtain the cobalt-nitrogen doped mesoporous carbon catalyst. The cobalt-nitrogen-doped mesoporous carbon catalyst shows excellent oxygen reduction catalytic activity under the alkaline condition, the half-wave potential reaches 0.873 V and is close to a 4-electron transfer path, and the stability and methanol tolerance are superior to those of a commercial Pt / C catalyst.

The invention relates to the technical field of preparation of alloy electrocatalysts, in particular to a method for preparing an alloy electrocatalyst by a rotary microwave-assisted method, which comprises the following steps: stirring and mixing carbon powder, cobalt chloride, deionized water and absolute ethyl alcohol, adding ammonia water, ultrasonically dispersing, filtering and collecting a filter cake, and drying to obtain the alloy electrocatalyst. Drying, heating, introducing hydrogen, carrying out heat preservation treatment, and collecting to obtain a precursor; taking the precursor, adding ethylene glycol, a sodium hydroxide solution, chloroplatinic acid and deionized water, carrying out ultrasonic-assisted treatment, collecting to obtain a mixed solution, placing the mixed solution in a sealed reaction device, and carrying out rotary microwave treatment; and carrying out pressure treatment, filtering, taking a filter cake, drying, heating, carrying out heat preservation and annealing treatment, collecting an annealed material, carrying out acid pickling treatment, and drying. The synergistic effect of the rotating microwaves ensures that the materials are uniformly heated, the particle aggregation phenomenon is reduced, a foundation is laid for the high activity and durability of the catalyst, and the method is more suitable for industrial large-scale production.

The invention belongs to the field of biological medicine, and particularly relates to a preparation method of an antibody, which comprises the step of adding cobalt chloride, ammonium heptamolybdate, nickel chloride and ammonium metavanadate into a cell culture for producing the antibody.

The preparation method comprises the following steps: dissolving sodium alginate and carbon black in water, adding polyacrylic acid, and carrying out a stirring reaction so as to obtain a mixture; then adding a CN precursor while heating and stirring, heating to a gel state, and roasting at high temperature to obtain a carbon nitride composite material; dispersing the composite material into water, adding a cobalt chloride solution, carrying out ultrasonic treatment, and adjusting the pH value to 10-11 to obtain a mixture; and adding a NaBH4 solution, reducing to obtain nano particles, filtering, washing and drying to obtain the catalyst. According to the preparation method, the carbon nitride composite carrier with high specific surface area is prepared firstly, then the active component is loaded, and the photocatalytic degradation effect of p-nitrophenol is improved through the synergistic effect of the composite carrier and the active component.

The invention relates to a method for producing mecobalamin by using a micro-channel reactor, which comprises the following steps: firstly, introducing a reaction mixed solution of cyanocobalamin, cobalt chloride, sodium borohydride and purified water into a first micro-channel reactor for reduction reaction; the obtained cyanocobalamin solution in the reduction state is introduced into a second microchannel reactor to be subjected to a methylation reaction with a trimethylsulfoxide iodide solution, and finally, an obtained mecobalamin solution is subjected to post-treatment to obtain a finished product. Compared with the prior art, the micro-channel reactor is used for continuous production, the mass and heat transfer effect is good, the reaction temperature can be accurately controlled, side reactions are further reduced, and the product quality is effectively improved.

The invention discloses a preparation method of a high specific gravity tungsten-nickel-cobalt nanopowder and alloy with uniform element distribution and fine particle size, belonging to the technical field of shielding materials and powder metallurgy. The method comprises the following steps: dissolving tungsten trioxide, cobalt chloride and nickel chloride in deionized water, mixing and stirring evenly, heating and stirring to evaporate the liquid, and then drying in an oven, grinding the dried agglomerates with a mortar and sieving to obtain a precursor powder. Subsequently, the precursor powder is sent into an argon plasma torch through a carrier gas hydrogen, and the powders from various parts are collected after the reaction is completed. The powders are loaded into a stainless steel mold, cold pressed and sintered in a tubular furnace under a hydrogen atmosphere to obtain a tungsten-nickel-cobalt heavy alloy block. The particle size of the tungsten-nickel-cobalt nanopowder prepared by the present invention is about 25nm, and the relative density of the tungsten-based heavy alloy after sintering is >99%. The shielding test results show that the linear absorption coefficient is 1.31 times that of lead.

The invention relates to application of a cobalt compound, a solar cell, slurry of the solar cell and a photovoltaic solder strip. In the application of the cobalt compound in preparation of the photovoltaic module, the cobalt compound comprises anhydrous cobalt chloride and thiocyanide. The cobalt compound is applied to the photovoltaic module, and when water vapor intrudes into the photovoltaic module, anhydrous cobalt chloride in the cobalt compound becomes red when encountering water, so that the area, provided with the cobalt compound, in the photovoltaic module presents conspicuous red which is used as a visual warning signal; maintenance personnel can quickly find and process potential problems of the photovoltaic module; and when the temperature of the photovoltaic module is too high, the anhydrous cobalt chloride reacts with the thiocyanide to present black, so that maintenance personnel can be warned of possible problems of the photovoltaic module in time.

The invention provides a reflective integrated electrochromic device. The reflective integrated electrochromic device sequentially comprises a first substrate layer, a working electrode layer, an integrated electrochromic layer, a counter electrode layer and a second substrate layer, the integrated electrochromic layer comprises a metal source compound; the metal source compound is selected from silver chloride, silver acetate, silver nitrate, silver perchlorate, silver sulfate, silver cyanide, silver sulfide, silver hexafluorophosphate, silver tetrafluoroborate, silver tetrachloroaluminate, silver trifluoromethanesulfonate, silver bis (trifluoromethane sulfonimide), copper fluoride, copper chloride, copper cyanide, copper sulfate, copper acetate, copper aluminate, cuprous fluoride, cuprous chloride, cuprous cyanide, gold chloride and gold cyanide; the catalyst is one or more of gold sulfide, gold chloride, gold (II) sulfide, nickel chloride, nickel sulfate, cobalt chloride and platinum chloride. The device has a relatively large transmittance / reflectivity dynamic change range, can perform light and heat management at the same time, and can keep a stable coloring or fading state for one month or even several months under a no-load condition.

The invention discloses cobalt chloride electrolysis equipment and a cobalt chloride electrolysis method. The cobalt chloride electrolysis equipment comprises an electrolytic bath; the anion exchange membrane is arranged in the electrolytic tank; the proton membrane is arranged in the electrolytic cell; wherein the proton membrane and the anion exchange membrane form a middle compartment, the proton membrane and the electrolytic cell form a positive compartment, and the anion exchange membrane and the electrolytic cell form a negative compartment; the cathode is arranged in the cathode compartment; the anode is arranged in the anode compartment; the power supply is electrically connected with the cathode and the anode respectively; and the magnetic pump is used for circulating the catholyte in the cathode compartment and the anolyte in the anode compartment respectively. According to the embodiment of the invention, the emission of chlorine can be reduced, and the pollution to the environment is reduced.