112 results about "Cobalt chloride" patented technology

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 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.

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.

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 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 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 provides a preparation method of a composite material for a photo-anode, the photo-anode and a battery, the preparation method of the composite material comprises the following steps: (1) mixing citric acid, urea and ethylene glycol, stirring, heating, filtering and dialyzing, and freeze-drying a solution obtained after dialyzing to obtain carbon quantum dot powder; (2) dissolving thioacetamide and cobalt chloride pentahydrate into an aqueous solution of ethanol, adding the carbon quantum dot powder obtained in the step (1), stirring, carrying out hydrothermal treatment to obtain a precipitate, washing with absolute ethyl alcohol, and then centrifuging and drying to obtain carbon quantum dot doped cobalt sulfide powder; and (3) adding titanium dioxide and the carbon quantum dot doped cobalt sulfide powder obtained in the step (2) into an ethanol aqueous solution, stirring, carrying out hydrothermal treatment to obtain a precipitate, washing, centrifuging and drying to obtain a carbon quantum dot-cobalt sulfide-titanium dioxide composite material, namely the composite material for the photo-anode. According to the invention, higher photoelectric conversion efficiency is obtained.

The invention discloses a system for preparing large-particle cobalt chloride hexahydrate through ultralow-temperature evaporative crystallization, which comprises a stock solution tank, a forced circulation pump, a forced heat exchanger, an ultralow-temperature crystallizer and a vacuum unit, the stock solution tank is connected with the forced circulation pump through a preheating unit, the forced circulation pump is located between the forced heat exchanger and the ultralow-temperature crystallizer, and the vacuum unit is connected with the forced heat exchanger. The forced circulation pump is used for circularly conveying a cobalt chloride solution to enter the forced heat exchanger to be heated and then enter the ultralow-temperature crystallizer to be subjected to flash evaporation, the ultralow-temperature crystallizer is connected with a centrifugal machine, and a gas treatment unit is arranged between the ultralow-temperature crystallizer and the forced heat exchanger; the gas treatment unit is used for treating secondary steam generated by flash evaporation and then supplying the treated secondary steam to the forced heat exchanger, and the vacuum unit is connected with the forced heat exchanger and used for maintaining a low-temperature environment for the ultralow-temperature crystallizer; no matched cooling crystallization equipment is needed, crystallization is directly completed through an ultralow-temperature evaporation and crystallization integrated process, the technological process is shortened, and the equipment investment and the occupied area are reduced.

The present application relates to the technical field of wastewater treatment of gold hydrometallurgy process, and particularly discloses a biological treatment method of gold smelting wastewater.A biological treatment method of gold smelting wastewater, comprising acid-base adjustment, sulfidation reaction, first flocculation and precipitation, biological treatment, second flocculation and precipitation, and monitoring and discharge; wherein the immobilized biochar used in the biological treatment is prepared by mixing activated sludge after banana stem, cassava residue and kelp are selected as the source of biochar and then the nutrients such as urea, starch phosphate sodium, phospholipase C, cobalt chloride, zinc chloride and magnesium chloride are attached to the biochar.The present application has the effect of improving the efficiency of biological treatment of acidic wastewater.

This invention relates to a high-interfacial-wetting cathode material and its preparation method in the field of thermal battery technology. The material comprises a cathode active material and a halide cathode additive, wherein the halide cathode additive accounts for 5% to 20% by mass. The cathode active material is a sulfide cathode, including one or more of FeS2, CoS2, and NiS2. The halide cathode additive is a metal halide, including one or more of nickel chloride, cobalt chloride, nickel fluoride, and copper fluoride. This solution significantly reduces the interfacial impedance between the cathode and the electrolyte, improving power performance and discharge capacity.

The invention relates to a method for preparing cobalt chloride from a cobalt raw material leaching solution, which comprises the following steps: (1) carrying out reduction leaching on crude cobalt hydroxide slurry by using a hydrochloric acid solution and hydrogen peroxide to obtain a leaching solution; (2) carrying out primary impurity removal on the leachate obtained in the step (1), and carrying out extraction impurity removal by using a P04 organic extraction agent, so as to obtain raffinate; and (3) pre-treating the raffinate obtained in the step (2), then extracting by adopting an N263 organic extraction agent, and sequentially washing and reversely extracting the obtained loaded organic phase to obtain a cobalt chloride finished product liquid. The hydrochloric acid solution and hydrogen peroxide are adopted for reduction leaching, the purity of cobalt chloride can be guaranteed, and introduction of sulfur is avoided; the N263 organic extraction agent is adopted to extract cobalt, the selectivity on cobalt is high, the extraction capacity on impurities such as Ni / Mg is basically avoided, saponification is not needed due to organic matter, direct extraction can be achieved, and finally the cobalt chloride finished product liquid with the low impurity content is obtained.

The invention belongs to the technical field of photothermal-photocatalytic synergistic materials, and particularly relates to a reduced graphene oxide-based nanocomposite as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, uniformly dispersing a graphene oxide dispersion liquid; s2, adding Ti < 3 > C < 2 > TX MXene, cobalt chloride hexahydrate and thioacetamide into the graphene oxide dispersion liquid to form a uniform reaction system; s3, carrying out hydrothermal reaction on the reaction system obtained in the step S2; s4, soaking and washing a product obtained after the hydrothermal reaction in the step S3; and S5, carrying out freeze drying on a product obtained after washing to obtain the reduced graphene oxide-based nano composite material. According to the preparation method disclosed by the invention, the reduced graphene oxide with more oxygen-containing functional groups reserved on the surface is obtained by utilizing the in-situ auto-oxidation reduction reaction between the graphene oxide and the Ti3C2TX MXene under the condition of not needing additional oxidizing agents and reducing agents, so that the composite material is endowed with good water transmission performance, and the high water evaporation rate is realized.

The invention provides a cobalt, nitrogen and fluorine co-doped carbon nanosheet as well as a preparation method and application thereof. The carbon nanosheet comprises the following components: anhydrous cobalt chloride, a nitrogen-containing organic ligand, polytetrafluoroethylene microspheres and a eutectic mixture, the preparation method of the carbon nanosheet comprises the following steps: placing anhydrous cobalt chloride, a nitrogen-containing organic ligand, polytetrafluoroethylene microspheres and a eutectic mixture in a tubular furnace in a protective gas atmosphere, and annealing and calcining to obtain a pyrolysis product; washing the pyrolysis product with deionized water to obtain a washing product; washing the washing product with acid, washing the washed product with deionized water, and drying the washed product to obtain the cobalt, nitrogen and fluorine co-doped carbon nanosheet; the carbon nanosheet is applied to electrocatalytic oxygen reduction performance testing as a catalyst. The carbon nanosheet provided by the invention has an ultrathin two-dimensional structure, a developed pore structure and high heteroatom doping amount, realizes co-doping of three heteroatoms of cobalt, nitrogen and fluorine, and has good electrocatalytic activity and high hydrogen peroxide catalytic selectivity.

The invention discloses a synthesis method of limidoterol, and belongs to the technical field of medicine synthesis. The method comprises the following steps: coupling cyclobutanone oxime and a caffeic acid derivative under the catalysis of ferrous acetylacetonate, a chlorobenzene solvent and the protection of nitrogen to obtain a decarboxylated cyanogen alkylation intermediate; oxidizing the intermediate with m-chloroperoxybenzoic acid in dichloromethane in the presence of sodium carbonate to obtain a vicinal diol monoester intermediate; catalyzing by cobalt chloride in methanol, reducing by sodium borohydride, and protecting by Boc2O to obtain a cyclized precursor; cyclizing the precursor in tetrahydrofuran by using sodium hydride to obtain a cyclized intermediate; and performing deprotection to obtain the limiterol. According to the method, dangerous reagents and processes are not used, the safety is high, and no heavy metal residues exist; the cost is low, precious metals are not needed, the post-treatment operation is simple and convenient, a complex purification process is not needed, and the total yield reaches 21%; process conditions are mild, normal pressure and conventional heating modes are adopted, and industrial production is easy to realize.

The present application relates to the technical field of sewage treatment, and discloses a composite material composition for groundwater remediation, a composite material, and a preparation method and application thereof.The composition contains modified nano zero-valent iron, cobalt chloride modified biochar, attapulgite, persulfate, and a binder; the mass ratio of the modified nano zero-valent iron, the cobalt chloride modified biochar, the attapulgite, the persulfate, and the binder is 1:2-6:0.5-1.5:1-3:16-40.The composite material provided by the present application forms a micro-electrolysis environment by using carbon nitride modified nano zero-valent iron and cobalt chloride modified biochar, can effectively improve the selectivity and removal rate of target pollutants, and can continuously play the roles of adsorption, Fenton-like catalytic oxidation, and micro-electrolysis in the process of treating contaminated groundwater after being embedded by the binder, so that the purpose of efficiently removing pollutants in groundwater is achieved.

The present invention reports the development of electrochromic supercapacitor application that comprises the vanadium doped cobalt chloride carbonate hydroxide. And, more particularly, developing a process to synthesize for use as electrochromic supercapacitor application. Methods of preparing the material and use for electrochromic supercapacitor application of the invention are also described. The catalyst shows a high capacitance value of the electrochromic supercapacitor having a capacitance value of 1219 F / g in alkaline medium with an optical modulation (∆T) value of 69% coloration efficiency value of 65 cm2c-1 at a wavelength of 600 nm. This invention provides a new vision for developing materials with dual characters, i.e., storing energy and changing its color for promising electrochromic supercapacitor applications.

The application discloses a preparation method and application of a cobalt monatomic doped strontium titanate composite material, and belongs to the field of water treatment. The cobalt doped strontium titanate composite catalytic material is composed of a cobalt metal doped strontium titanate material. A preparation process uses tetrabutyl titanate and a nitrate as reactants, ethylene glycol and water as solvents, and prepares strontium titanate (SrTiO3: STO) through a hydrothermal method. Then, cobalt monatomic atoms are doped into the strontium titanate through cobalt chloride (a cobalt source) by using an electrostatic adsorption method, so as to form cobalt doped strontium titanate (Co-STO). The material can efficiently activate an oxidant peracetic acid and rapidly degrade various antibiotic pollutants, and especially performs well in degrading quinolone, tetracycline and macrolide antibiotics. The catalytic material has the advantages of low cost, renewability and environmental protection, and is very suitable for being applied to a deep treatment process of pharmaceutical wastewater.

The invention discloses application of cobalt chloride in promoting Korean pine somatic embryogenesis, and belongs to the technical field of plant regeneration. The invention aims to improve the somatic embryo generation efficiency and somatic embryo quality of the Korean pine callus. The invention provides an application of cobalt chloride in promoting Korean pine somatic embryogenesis. The concentration of the cobalt chloride is 50 mu M / L. According to the method, the genetic improvement efficiency of the Korean pine is improved.

The invention discloses a method for catalytic synthesis of sulfoximine guanidine compounds by cobalt dichloride, which realizes efficient preparation of the sulfoximine guanidine compounds by taking cobalt dichloride as a catalyst and through free radical coupling reaction of sulfoximine compounds, isonitrile compounds and sulfonyl azide compounds. The method can effectively protect high-valence thioguanidyl, has the advantages of mild reaction conditions, high synthesis efficiency and strong substrate universality, and has extremely high practical application value.

The application discloses a phthalocyanine cobalt / pyridine nitrogen skeleton substituted phthalocyanine copper / asphalt coke active carbon composite catalytic material and a preparation method and application thereof, and the method comprises the following steps: 1, pyridine-2,3-dicarboxylic acid, urea, ammonium molybdate, copper chloride dihydrate and asphalt coke active carbon are mixed to obtain a mixture A; 2, the mixture A is kept at 100-180 DEG C, and then kept at 200-350 DEG C to obtain a product B; 3, the product B is ground, soaked, washed and dried in sequence to obtain pyridine nitrogen skeleton substituted phthalocyanine copper / asphalt coke active carbon; 4, phthalic anhydride, urea, ammonium molybdate, cobalt chloride hexahydrate and pyridine nitrogen skeleton substituted phthalocyanine copper / asphalt coke active carbon are mixed to obtain a mixture C; 5, the mixture C is kept at 100-180 DEG C, and then kept at 200-350 DEG C to obtain a product D; 6, the product D is ground, soaked, washed and dried in sequence to obtain the phthalocyanine cobalt / pyridine nitrogen skeleton substituted phthalocyanine copper / asphalt coke active carbon composite catalytic material, the purity of the material is high, and the discharge time and voltage of a Li / SOCl2 battery are improved.

The application relates to a construction method of tellurium-doped cobalt intercalated MXene. The purpose of the application is to solve the problems of easy stacking and few active sites of MXene, and provide a construction method of tellurium-doped cobalt intercalated MXene. The prepared MXene has excellent electrocatalytic hydrogen evolution performance. Method: taking cobalt chloride, V2AlC, hydrochloric acid and lithium fluoride as raw materials, a hydrothermal method and a calcination method are adopted to obtain high-efficiency tellurium-doped cobalt intercalated MXene, so as to provide a preparation method for improving the electrocatalytic hydrogen evolution performance of the existing MXene-based materials.

The invention relates to a preparation method of a cobalt sulfide CoSx / CC electrode, which comprises the following steps: 1) taking cobalt chloride and thiourea as raw materials, respectively dissolving the cobalt chloride and thiourea in deionized water at room temperature, and then mixing the two solutions to obtain a uniform CoSx solution; (2) transferring the solution and a piece of carbon cloth (1 * 6 cm) into a reaction kettle together, sealing, and putting into a drying oven to react for 6-20 hours at the constant temperature of 160-180 DEG C; and after the reaction kettle is naturally cooled to room temperature, taking out the carbon cloth, washing, and recording the obtained product as the CoSx / CC composite electrode. The CoSx / CC composite electrode material prepared by the invention has the advantages of low cost, regular crystal structure, excellent chemical stability, good cycling stability and the like. Compared with a traditional electrode material, the photocurrent density is remarkably improved, the conversion rate and selectivity of an electro-catalysis nitrate reduction synthesis ammonia reaction can be effectively improved, and wide application prospects are shown in the fields of advanced treatment of domestic sewage and industrial wastewater, green synthesis of ammonia resources and the like.

This disclosure provides systems, methods, and apparatus related to lithium-ion batteries. In one aspect, a method includes synthesizing an intermediate selected from a group of a nickel-manganese-cobalt nitrate, a nickel-manganese-cobalt acetate, a nickel-manganese-cobalt sulfate, a nickel-manganese-cobalt chloride, and a nickel-manganese-cobalt phosphate. The intermediate is mixed with a lithium salt selected from a group of LiOH, LiCl, LiNO3, LiSO4, LiF, LiBr, Li3PO4, Li2CO3, and combinations thereof to form a mixture. The mixture is annealed at a sequence of temperatures and times to form a plurality of single crystals of a lithium nickel-manganese-cobalt oxide, with no cooling of the mixture between operations of the sequence of temperatures and times.

This invention discloses a chiral oxazoline-pyridine-imine cobalt compound, its synthesis method, and its applications. The synthesis method involves the condensation reaction of 2-cyano-6-acetylpyridine and an aniline derivative with p-toluenesulfonic acid to generate a pyridine-imine compound. This compound is then cyclized with different chiral amino alcohols in the presence of zinc trifluoromethanesulfonate to generate chiral oxazoline-pyridine-imine ligands. The reaction of these ligands with anhydrous cobalt chloride successfully prepared four chiral oxazoline-pyridine-imine cobalt compounds. The cobalt catalyst synthesized in this invention possesses different chiral groups, electronic effects, and steric hindrance, and can catalyze the polymerization of isoprene.

This invention proposes a boron-phosphorus co-doped multi-element alloy catalyst supported on a metal oxide substrate, its preparation method, and its application. It belongs to the technical field of sodium borohydride hydrolysis hydrogen production materials. The method involves loading cobalt salts (such as cobalt chloride or cobalt nitrate), iron salts (such as ferric chloride or ferric nitrate), and hypophosphite (such as sodium hypophosphite) onto a support (such as γ-alumina or titanium dioxide) using an initial wet impregnation method. Sodium borohydride solution is added for chemical reduction, and boron is added for doping. After washing the reduction product, the catalyst is dried to obtain the supported boron-phosphorus co-doped multi-element alloy catalyst. When used as a sodium borohydride hydrolysis hydrogen production catalyst, it provides a maximum hydrogen production rate of 12729.78 mL·g under optimal conditions. cat ‑1 ·min ‑1 It produces 100% of the theoretical hydrogen yield and features good catalytic performance, simple preparation method, abundant raw materials, and low cost.

The invention discloses a boron-free and iron-free foliar fertilizer suitable for plateau wolfberry and a preparation method thereof, and belongs to the technical field of agricultural fertilizers. The foliar fertilizer is characterized in that the foliar fertilizer does not contain boron and iron elements, is rich in manganese, molybdenum and selenium elements, and is mainly prepared from urea, KH2PO4, rare earth nitrate, MnSO4, ZnSO4, KCl, sodium metasilicate, methionine, EDTA, ammonium molybdate, CuSO4, sodium selenite, lithium chloride, cobalt chloride and a liquid solvent according to a specific weight percentage or thousand parts. The liquid solvent is preferably a plateau slaughter house sewage biogas slurry rich in amino acid. The invention also provides a preparation method of the foliar fertilizer, which comprises the following steps: mixing solid raw materials to prepare powder A, taking a liquid solvent as a liquid B, and mixing and dissolving before application. The foliar fertilizer is specially designed for the plateau environment, can effectively solve the problem of lack of pertinence in the prior art, remarkably improves the yield and quality of Chinese wolfberry fruits, reduces the fruit cracking rate and enhances the disease resistance.

The invention discloses an abamectin fermentation culture medium and a fermentation process, and relates to the technical field of culture media. The abamectin fermentation culture medium is prepared from 15 g / L to 30 g / L of glucose, 81 g / L to 103 g / L of dextrin, 8 g / L to 12 g / L of corn steep liquor, 11 g / L to 15 g / L of soybean cake powder, 0.2 g / L to 0.5 g / L of ammonium sulfate, 0.2 g / L to 0.5 g / L of dipotassium phosphate, 0.05 g / L to 0.2 g / L of monopotassium phosphate, 0.05 g / L to 0.32 g / L of manganese sulfate, 0.3 g / L to 0.5 g / L of cobalt chloride, 0.6 g / L to 1.8 g / L of sodium chloride, 0.05 g / L to 0.25 g / L of a defoaming agent and 2.4 g / L to 5.2 g / L of silanization modified aluminum oxide. According to the technical scheme, glucose and dextrin are adopted as carbon sources, corn steep liquor, soybean cake powder and ammonium sulfate are adopted as nitrogen sources, and silanization modified aluminum oxide is added, so that the element production capacity of thalli is improved, and the titer of abamectin B1a is improved.

The invention belongs to the technical field of clinical biosensing diagnosis equipment, and particularly relates to a preparation method and application of a salivary lactic acid and beta-2-microglobulin dual-marker biosensing microchip. Dissolving copper chloride, manganese chloride, nickel chloride, cobalt chloride and zinc chloride, adding sodium citrate, and adding potassium ferricyanide to obtain the high-entropy Prussian blue material. And dropwise adding onto the first working electrode and the second working electrode, and modifying. Based on an electrochemical biosensing technology, a high-stability biosensing chip is obtained through preparation of a high-performance high-entropy PB material, and the high-stability biosensing chip has excellent electrochemical biosensing performance. Lactic acid and beta-2-microglobulin in saliva can be specifically recognized, and new possibility is provided for production of oral early noninvasive diagnosis products.

The application belongs to the technical field of adsorbing materials, and particularly relates to a modified magnetic biochar adsorbing material and a preparation method and application thereof, and the preparation thereof comprises the following steps: (1) oxygen-limited activation of litchi shell, grinding, and obtaining litchi shell biochar; (2) placing the litchi shell biochar in a cobalt chloride solution, stirring and mixing, ultrasonic treatment, aging, drying and grinding, reacting in the oxygen-limited condition, and grinding after cooling, so as to obtain magnetic litchi shell biochar; (3) mixing the magnetic litchi shell biochar with chitosan, adding acetic acid, stirring, adding sodium hydroxide solution, then washing away soluble salt substances, drying and grinding, so as to obtain the modified magnetic biochar adsorbing material. The application uses litchi shell as a biochar raw material, introduces magnetic materials and chitosan to modify the function of the biochar, so that the prepared material has many surface active sites, realizes good Cr(Ⅵ) adsorption performance, and can be recycled and reused.