258 results about "Manganous chloride" patented technology

The invention discloses a Ni-Mn layered double hydroxide@nickel foam@carbon three-dimensional hierarchically-structured electrode material and a preparation method thereof. The preparation method comprises the following steps: firstly carrying out one-step hydrothermal treatment by respectively taking nickel chloride hexahydrate, anhydrous manganese chloride and nickel foam as a nickel source, a manganese source and a substrate, so as to obtain Ni-Mn LDH@NF; and coating Ni-Mn LDH@NF by virtue of glucose or graphene as a carbon source, and carrying out hydrothermal treatment, so as to obtain Ni-Mn LDH@NF@C. According to the preparation method, by virtue of a stepwise hydrothermal-drying method, the preparation process and the required equipment are simple, raw material sources are rich, the reaction temperature is relatively low, the high temperature carbonization is not needed, and the large-scale production is easy to realize; and the Ni-Mn LDH@NF@C composite material is good in thermal stability, high in crystalline degree, large in specific surface area and strong in shape controllability and is one of ideal energy source materials.

The invention discloses a method and a device for simultaneous reduction and oxidation of nitrogen oxides from airflow. According to a treating process, the treated airflow is guided into a gas-solid reaction tower, solid ferrous chloride, ferric chloride, manganese chloride or magnesium chloride metal chloride particles are guided into the gas-solid reaction tower simultaneously, and the metal chloride is decomposed at the high temperature and reacts with nitric oxide in the airflow, so that part of nitric oxide contained in the airflow is reduced to nitrogen, the rest nitric oxide is oxidized into nitrogen dioxide, generated nitrogen dioxide reacts with an alkaline absorbent easily to be removed, and the purpose of gas purification is achieved. The invention further discloses the special device. The method and the device have the characteristics of low investment cost as well as operation and application cost, simplicity in operation, high treatment efficiency and high treatment capacity.

The invention relates to a preparation method of an aqueous phase non-toxic white light quantum with a multilayer core-shell structure. The preparation method comprises the following specific steps: (a) preparing a shell layer material Zn+mercaptopropionic acid (MPA)+thioacetamide (TAA): taking Zn(NO3)2 and adding the Zn(NO3)2 into a conical flask filled with deionized water, taking the MPA by using a miniature liquid-transferring gun; adding the TAA into the solution; fully stirring the solution and then adjusting the pH value of the mixed solution by using NaOH; and fully stirring the solution for later use; (b) adding the deionixed water, manganese chloride and the MPA in a three-necked bottle, adjusting the pH value and then introducing nitrogen gas and removing air in the three-necked bottle by using high-purity nitrogen gas; injecting sodium hydrogen selenide by using an injector and then allowing the manganese chloride and the sodium hydrogen selenide to be fully acted to form a selenide-rich MnSe quantum dot; then injecting zinc nitrate and growing for one hour; injecting the shell layer material in the step (a) and growing; then adding a copper chloride solution and growing; adding the shell layer material; and finally, regrowing to obtain the required white light quantum dot. The white light quantum dot synchronized by the preparation method is better in water solubility and stability and has broad application prospect.

The invention discloses a synthesis method and application method of manganese Prussian blue material for a lithium ion battery, and belongs to the preparation and application method of the manganesePrussian blue material. The synthesis method comprises the following steps: selecting a manganese source from anhydrous manganese chloride (MnCl2) or manganese chloride monohydrate (MnCl2.H2O); selecting an iron source and cyanogen from potassium ferricyanide (K3[Fe(CN)6]); selecting a chelating agent from anhydrous sodium citrate or sodium citrate dihydrate; weighing the manganese source and theclelating agent in mass ratio of x: 1, and dissolving into a mixed solution with the methyl alcohol and deionized water in any proportion to prepare a solution A; dissolving the potassium ferricyanideinto the deionized water to prepare the solution B with the concentration of 0.04mol / L; pouring the solution B into the solution A, uniformly mixing to acquire the solution C, standing for 6-24h at the room temperature, and separating, purifying and drying to obtain a target product. The synthesis method disclosed by the invention has the advantages that the raw material is easy to obtain, the synthesis method is simple, the operation step is high in controllability, the obtained product is high in purity, and uniform in particle size; and the structure is a hollow cube and easy to prepare ina large-scale manner. The manganese Prussian blue material disclosed by the invention is served as the lithium ion battery negative material, and is excellent in electrochemical performance.

Embodiments relate to methods and formulations of buffers used for isolating, purifying, and recovering long-chain and short-chain nucleic acids. The areas of application of the inventive method include all laboratories engaged in isolating nucleic acids. In one embodiment a solution containing a nucleic acid is prepared with additives containing monovalent and multivalent cations and, optionally, an alcohol and / or additional additives. The solution is contacted with a solid phase, the solid phase is optionally washed, and the nucleic acid is removed. The solution may contain multivalent and / or monovalent cations and may contain an alcohol. The solution in certain embodiments has a pH between 7 and 10. Ammonium chloride, sodium chloride and / or potassium chloride may be used as monovalent salt components. Magnesium chloride, calcium chloride, zinc chloride and / or manganese chloride may be used as multivalent salt components. In a preferred embodiment, identical molar amounts of sodium chloride and manganese chloride are used.

An improved method of preserving a molecule in a bodily fluid comprises: (1) providing a preservative solution comprising: (a) an amount of a divalent metal chelator selected from the group consisting of ethylenediaminetetraacetic acid (EDTA), (ethylenebis(oxyethylenenitrilo))tetraacetic acid (EGTA), and 1,2-bis(2-aminophenoxy)ethane-N,N,N′,N′-tetraacetic acid (BAPTA) and salts thereof in the range of from about 0.001 M to about 2 M; and (b) an amount of at least one chelator enhancing component selected from the group consisting of lithium chloride, guanidinium chloride, guanidinium thiocyanate, sodium salicylate, sodium perchlorate, and sodium thiocyanate in the range of from about 0.1 M to about 10 M; and (2) adding the preservative solution to the bodily fluid, thus preserving the molecule. The molecule can be a protein or a small molecule, such as a steroid. The invention also encompasses preservative compositions suitable for preserving proteins or small molecules, and kits. Preservative compositions can further include at least one enzyme inactivating component selected from the group consisting of manganese chloride, sarkosyl, and sodium dodecyl sulfate in the range of up to about 5% molar concentration. Compositions and methods according to the present invention have many diagnostic and forensic uses, in addition to being suitable for preparing compositions usable by hunters for attracting animals.

The invention discloses a manganese-doped inorganic halogen perovskite quantum dot, and a preparation method and an application thereof. The preparation method comprises the following steps: dissolving lead salt and manganese chloride, and carrying out heating at 80 DEG C to 110 DEG C so as to obtain a halogen precursor; dissolving caesium salt so as to obtain a caesium precursor; adding the caesium precursor into the halogen precursor, and carrying out heating at 80 DEG C to 110 DEG C so as to obtain a quantum dot solution; and purifying the quantum dot solution so as to obtain the manganese-doped inorganic halogen perovskite quantum dot. The invention provides a method for high-yield preparation of the manganese-doped inorganic halogen perovskite quantum dot without the need of protection of inert gas at a low temperature. The method provided by the invention reduces preparation cost, improves preparation efficiency, and can be used for large-scale production. The quantum dot is applied to invisible ink which has good effect, is convenient to write and has stable invisible effect; meanwhile, after manganese is doped, the quantum dot has greatly-improved thermal stability and greatly-reduced toxicity.

The invention discloses a co-precipitation preparation method of a composite oxide denitration catalyst and belongs to the technical field of preparation of nitric oxide reduction catalysts. The method comprises the following steps: in the presence of a solvent, mixing aluminum sulfate, titanium sulfate, ammonium vanadate and sodium metasilicate with at least one of ammonium tungstate, manganese chloride, nickel nitrate, cobalt nitrate and chromic nitrate; then placing an obtained precursor into a muffle furnace, and roasting the precursor to obtain the catalyst. According to the method, the use of TiO2 in a conventional V-W-Ti catalyst is reduced, and the cost is reduced; meanwhile, the specific surface area of the catalyst is increased. The formed catalyst contains two or more of components from Ti, Si, Al, V, W, Cr, Ni, Mn and Co; the denitration activity of the catalyst is favorably improved by the strong cooperative action of each active component and a carrier; the catalyst is applicable to SCR (selective catalytic reduction) denitration reaction at low temperature of 250-500 DEG C.

The invention discloses a method for preparing anhydrous manganese chloride under anhydrous reaction conditions, which comprises the following steps: (1) mixing metal manganese powder and solvent alcohol, introducing gas hydrogen chloride into the solvent alcohol in a metering mode to react with the metal manganese powder until the manganese powder is completely dissolved, and filtering to obtain an anhydrous manganese chloride alcohol solution; (2) stirring and distilling under normal pressure in a hydrogen chloride atmosphere to recover the solvent and obtain a manganese chloride crystal alcohol complex; and putting the manganese chloride crystal alcohol complex into a closed dryer, heating in a stirring state, and dealcoholizing under reduced pressure to obtain the anhydrous manganese chloride. The method has the characteristics of simple technique, simple after-treatment, high safety and high product yield, and does not have the basic manganese chloride and manganese peroxide impurities in the conventional preparation method. The anhydrous manganese chloride is obtained under anhydrous conditions, so the method has the advantages of high product yield, high safety and the like, and is simple to operate and suitable for industrial production.

The invention relates to a preparation method and applications of a carbon nano-tube-supported transition metal oxide material. The preparation method comprises: annealing CNTs, dissolving, carrying out ultrasonic treatment, and carrying out suction filtration and film forming; dissolving 1.74 g of cobalt nitrate hexahydrate, 0.436 g of nickel nitrate hexahydrate, manganese chloride, ammonium fluoride, urea and cetyltrimethylammonium bromide in 80 ml of deionized water, wherein a molar ratio of cobalt nitrate hexahydrate to manganese chloride is 0.05-0.4, and a molar ratio of cobalt nitrate hexahydrate to ammonium fluoride to urea to cetyltrimethylammonium bromide is 6:9:20:4; and transferring the formed solution and the carbon nano-tubes into a reaction kettle, and preparing the carbon nano-tube-supported transition metal oxide material through a hydrothermal method. According to the present invention, the preparation process is simple, the cost is low, the prepared material has advantages of good structure uniformity, large specific surface area and excellent electrochemical performance, and the disadvantages that the cost of the precious metal catalyst is high, the preparation process is complicated and the industrialization is difficult to achieve are overcome.

The invention discloses a solid-state culture medium for benefiting long-term storage of haematococcus pluvialis algae. The solid-state culture medium is characterized by being prepared from the following components in every liter of the culture medium: 1.3-1.4g of sodium nitrate, 0.13-0.15g of sodium carbonate, 0.15-0.25g of magnesium sulfate, 0.05-0.10g of dipotassium phosphate, 0.009-0.019g of ammonium ferric citrate, 0.010-0.050g of citric acid, 0.025-0.035g of potassium sorbate, 0.001-0.010g of ethylene diamine tetraacetic acid, 0.000222-0.001000g of zinc sulfate, 0.00286-0.00586g of 0.00286-0.00586g of boric acid, 0.0018-0.0036g of manganese chloride, 0.000494-0.000894g of cobalt nitrate, 0.00039-0.00089g of sodium molybdate, 0.000079-0.000150g of copper sulfate, 0.1-1.0g of sodium acetate, 15-17g of agar powder, 0.025-0.050g of biotin, 2-5ml of vitamin B1 and 5-10ml of vitamin B12. The invention aims to provide a novel formula and the preparation method of the haematococcus pluvialis solid-state seed-conservation culture medium to solve the problems that reproduction of haematococcus pluvialis is inhibited by the existing formula, growth factors are not sufficient or excessive and are easily polluted by bacteria, and the like, so that the effect of prolonging the preservation period of haematococcus pluvialis algae can be achieved.

The invention provides a Castanea henryi high-yielding regulator and application thereof. The Castanea henryi high-yielding regulator is composed of a Castanea henryi high-yielding regulator 1 and a Castanea henryi high-yielding regulator 2, wherein the Castanea henryi high-yielding regulator 1 contains the following components in parts by weight: 10-150 parts of potassium dihydrogen phosphate, 20-150 parts of calcium chloride, 50-100 parts of boric acid, 50-100 parts of sucrose, 0.5-3 parts of 2,4-dichlorphenoxyacetic acid, 20-70 parts of gibberellin and 1-4 parts of indolebutyric acid; and the Castanea henryi high-yielding regulator 2 contains the following components in parts by weight: 100-300 parts of urea, 10-70 parts of ammonium phosphate, 20-50 parts of potassium sulfate, 30-70 parts of magnesium chloride, 50-100 parts of calcium chloride, 50-100 parts of manganese chloride, 10-30 parts of zinc sulfate and 50-200 parts of ferrous sulfate. The Castanea henryi high-yielding regulator provided by the invention can obviously enhance the yield of the Castanea henryi, and ensure the high and stable yield of the Castanea henryi.

The invention provides a production method for bacillus licheniformis with a high sporation rate. According to the production method, no manganese chloride is added into a fermentation medium in a fermentation tank, a sterilized manganese chloride solution is supplemented after fermentation is carried out for 23-25 h, and the volume of the sterilized manganese chloride solution accounts for 0.03-0.04 % of the fermentation volume. As manganese chloride is added in the middle and later stage of fermentation, early-stage growth of the bacillus licheniformis is not affected, the sporation rate of the bacillus licheniformis is increased, the fermentation cycle is shortened, the fermentation production cost is reduced, and better product quality is achieved.

The invention relates to a double-functional amorphous FeMn-MOF-74 (ferromanganese-metal organic framework-74) nanoflower material and a preparation method and application, and relates to a nanometermaterial and a preparation method and application, which aim at solving the problem of low adsorption capacity of existing MOF-based adsorbent to As(III). The double-functional amorphous FeMn-MOF-74 nanoflower material is prepared by taking 2,5-dihydroxy terephthalic acid as an organic ligand, anhydrous manganese chloride and anhydrous ferrous chloride as metal salt ligands, and N,N-dimethyl formamide and anhydrous ethanol as solvents through a solvothermal method. The preparation method comprises the following steps of 1, preparation of a mixed solution; 2, solvothermal reaction; 3, cleaningand drying. The double-functional amorphous FeMn-MOF-74 nanoflower material is used for removing poisonous metals in water, and oxidizing the poisonous metals in the water. The preparation method canbe used for preparing the double-functional amorphous FeMn-MOF-74 nanoflower material.

The invention discloses a preparation method of high-stability amorphous manganous silicate. The method comprises the steps that sodium silicate and manganese chloride are used as raw materials, and amorphous manganous silicate powder is obtained through boiling water processing; the amorphous manganous silicate powder and glucose are mixed to be subjected to a reaction under the temperature of 600-700 DEG C. According to the preparation method of the amorphous manganous silicate, the reaction time is short, the reaction temperature is low, the production efficiency is high, and the method is suitable for mass production. The obtained amorphous manganous silicate is high in purity and amorphous structural stability.

The invention discloses porous manganese dioxide and a preparation method thereof. The porous manganese dioxide is of a sponge-like three-dimensional porous structure and measured with a BET specific surface apparatus to obtain the pore size of 2-10nm and the specific surface area of 183.0-247.9 square meter / g. The preparation method includes firstly preparing aluminum oxide of a porous structure, immersing the aluminum oxide into an aqueous solution of potassium permanganate for 0.5-1 hour, filtering, immersing an obtained filtered cake into an aqueous solution of manganese chloride or manganese sulfate, stirring to produce manganese dioxide, filtering, immersing an obtained filtered cake into an aqueous solution of sulfuric acid for the reaction at 70-80 DEG C for 7-8 hour, filtering, cleaning, adding the obtained cake into an aqueous solution of sodium hydroxide for the reaction at 70-80 DEG C for 7-8 hours, filtering, cleaning, and drying the obtained cake at 110 DEG C in vacuum to obtain porous manganese dioxide. The porous manganese dioxide has a high specific capacitance and the preparation method is simple and low in costs.

The invention provides a preparation method of cobalt manganese spinel microspheres. The method comprises weighing manganese chloride and cobalt chloride, dissolving the manganese chloride and cobaltchloride in deionized water, weighing ammonium hydrogen carbonate as a pH adjuster, carrying out mixing through stirring, carrying out hydrothermal pretreatment at 100-150 DEG C, after the reaction product is naturally cooled, carrying out centrifugal filtration, orderly washing the precipitates through deionized water and ethanol, carrying out drying to obtain cobalt carbonate and manganese carbonate precursors, and calcining the cobalt carbonate and manganese carbonate precursors through a muffle furnace at a temperature of 500 to 700 DEG C for 1-3h to obtain the cobalt manganese spinel microspheres. The cobalt manganese spinel microspheres are used for research on thermal catalytic CO2 reduction and can produce synthetic organic fuel (methane). The cobalt manganese spinel obtained by the preparation method is a pure phase and spherical, has a high specific surface area, obvious exposes the high-energy crystal surface, reduces the temperature of thermal catalytic CO2 reduction and has high product selectivity.

The invention discloses a preparation method for a high-sensitivity bimodal magnetic resonance contrast agent. According to the preparation method, by means of a method for preparing ferric oleate andmanganese chloride through thermal decomposition, a high-boiling-point solvent is adopted as a reaction medium, oleic acid and oleylamine are used as stabilizers, and therefore manganese oxide embedded iron oxide nanoparticles with narrow particle size distribution and high degree of crystallinity are obtained. The invention particularly relates to a preparation method for modifying the manganeseoxide embedded iron oxide nanoparticles by utilizing the oleic acid / the oleamine, or a preparation method for the biocompatible and water-soluble manganese oxide embedded iron oxide nanoparticles. The preparation method for the high-sensitivity dual-mode magnetic resonance contrast agent has the advantages that the requirements of magnetic resonance imaging for the contrast agent and the characteristics of the Nanotechnology are combined, by means of regulation and control over chemical synthesis, manganese oxide with the T1 contrast capability and superparamagnetic iron oxide nanoparticles with the T2 contrast capability are combined so as to form the manganese oxide embedded iron oxide nanoparticles, and therefore the cooperatively-enhancing dual-mode magnetic resonance contrast effectcan be achieved between the two imaging modes, namely, the T1 imaging mode and the T2 imaging mode.

The invention relates to a preparation method of a graphene-sulfide composite negative material. The preparation method comprises the following steps of: (1) preparing a transition metal tin compound / graphene composite material; (2) dissolving manganese chloride in deionized water, adding transition metal tin compound / graphene composite material to the solution, and fully stirring and dispersing the mixture to obtain a mixed solution; and (3) adding sodium sulfide into the mixed solution, sealing and heating, reacting and cooling to room temperature, collecting a solid product, alternately and repeatedly washing the product with deionized water and ethanol, and drying the washed product to obtain the nickel-based graphene-manganese sulfide composite negative material. According to the nickel-based graphene-manganese sulfide composite negative material for a lithium-ion battery, the manganese sulfide with high specific capacity and the nickel and copper modified graphene material are combined together, so that the negative material has the characteristics of high capacity, high conductivity and high cycle stability.

The invention relates to a method for preparing methanesulfonic acid by recycling a byproduct, namely hydrochloric acid. The method is characterized in that a method of hydrogen chloride, chlorine gas, methanesulfonic acid and hydrogen chloride is adopted, and the byproduct, namely the hydrochloric acid is recycled in the preparation process of the methanesulfonic acid to prepare the methanesulfonic acid. The method has the advantages that the byproduct, namely the hydrochloric acid is adopted for preparing chlorine gas and directly reacted with dimethyl disulfide, so that the safety risk and the logistics cost in purchase, transportation and storage of the chlorine gas with severe toxicity can be avoided; the byproduct, namely the hydrochloric acid, which is difficult to sell can be locally digested and utilized, and turned into treasure, so that the byproduct, namely the hydrochloric acid becomes a main raw material for preparing the methanesulfonic acid and the recycling of chlorine element is realized. Simultaneously, leftover manganese dioxide waste after oxidation reaction of potassium permanganate is utilized to prepare manganese chloride, and the manganese chloride can be used for electrolytic manganese, so that the production cost and the safety risk of the methanesulfonic acid are greatly reduced, and two major restricting factors, namely the chlorine gas and the byproduct, namely the hydrochloric acid in the preparation method of the methanesulfonic acid are simultaneously eliminated.

The invention discloses a production process and production device of power battery cathode ternary oxide. The production process comprises the following steps: respectively conveying a nickel chloride solution, a cobalt chloride solution and a manganese chloride solution into a stirring tank for mixing through a metering pump to obtain a mixture firstly, then conveying the mixture into a pre-concentrator through a fine filter for heat exchange with furnace gas from roasting furnace, then putting into the roasting furnace for combustion heating so as to decompose the mixture into ternary oxide solids and hydrogen chloride gas, recycling ternary oxide solid particles in the form of powder, cooling the gas first, then carrying out two-stage absorption to form regenerated hydrochloric acid, and carrying out subsequent processing treatment on the recycled ternary oxide, wherein the whole production process is controlled by an independent PLC system. The production process disclosed by the invention is short in flow and stable in technological process, cannot block a material feeding pipeline, and is low in cost; furthermore, a product cannot cause secondary pollution to the environment; the product quality is high; moreover, mixed waste liquid is used as a raw material for preparation, so that energy conservation and consumption reduction can be realized, and the effect of low-carbon discharge is achieved.

The invention relates to the technical field of CsPbCl3 nanocrystal material preparation and in particular to a method for increasing the manganese doping concentration and the light emission efficiency of a manganese-doped CsPbCl3 nanocrystal. The method comprises the following steps: preparing a caesium precursor solution; mixing octadecene, oleic acid, oleylamine, tri-n-octylphosphine, lead chloride, lead chloride, manganese chloride and nickel chloride; and forming a Ni-Mn double-doped CsPbCl3 nanocrystal, so as to obtain a Ni-Mn double-doped CsPbCl3 nanocrystal solution. By adopting the method, by adding NiCl2, the crystallinity and the surface defect state of a Mn-doped CsPbCl3 nanocrystal can be improved, the doping concentration of Mn in the manganese-doped CsPbCl3 nanocrystal canbe increased, and the light emission efficiency of the manganese-doped CsPbCl3 nanocrystal can be improved.

The invention discloses a manganese molybdate nanosheet material and a preparation method and application thereof. The preparation method comprises the steps of mixing sodium molybdate and manganese chloride in water regulating the concentration of sodium molybdate in the mixed solution to be 0.5-1.5mmol / l and regulating the concentration of manganese chloride to be 0.5-1.5mmol / l, thus obtaining aprecursor mixing solution; feeding a substrate into the precursor mixing solution; transferring the substrate and the precursor mixing solution into a high-pressure kettle; reacting for 360-480min under the temperature of 160-180 DEG C; and washing and drying, thus obtaining the MnMoO4 nanosheet on the substrate. The manganese molybdate nanosheet material is directly used as a working electrolytefor electrochemically decomposing water; the manganese molybdate nanosheet material is high in water electrolyzing catalyzing activity in electrolyte environments with different pH, and moreover, themanganese molybdate nanosheet material is quick to act, high in efficiency, low in cost, simple to prepare, environmentally friendly, and suitable for massive industrial production.

The invention discloses a preparation method and an application of a core-shell Ni-Co LDH@Ni-Mn LDH. The method comprises steps that (a), carbon nanotube solution is prepared; (b), nitrogen-doped carbon nanotube foam (NSCS) is prepared by coating carbon tubes and a fire process; (c), NSCS is placed in mixed solution of nickel chloride, cobalt chloride, urea, distilled water and methanol, after hydrothermal reaction and drying, Ni-Co LDH / NSCS is obtained; and (d), a composite material of the core-shell structure is obtained through chemical deposition of Ni-Co LDH / NSCS placed in mixed solutionof manganese chloride, nickel chloride, hexamethylenetetramine and distilled water at 90 DEG C. The composite material can be applied to wearable portable energy storage devices, compared with the single-layer LDH, the core-shell composite material increases the specific surface and electrochemical active sites of active materials, contact between the material and the electrolyte is made to be more complete, volumetric deformation is further reduced, advantages of nuclear and shell parts can be fully performed, and overall electrochemical performance of the material is improved.

The invention discloses a preparation method of pencil-shaped gamma-MnS microcrystal. The preparation method comprises the following steps of: adding manganese chloride into de-ionized water to obtain solution A; adding thioacetamide into the transparent solution A and ultrasonically dispersing to obtain solution B; pouring the solution B into a flask and sealing; placing the sealed flask in a microwave, ultraviolet and ultrasonic three-in-one synthesis and extraction reactor; heating; performing ultraviolet irradiation to obtain solution C; pouring the solution C into a microwave hydrothermal reaction kettle; sealing the reaction kettle; placing the reaction kettle in a warm pressing double-control microwave hydrothermal reaction instrument; naturally cooling to room temperature after the reaction is finished; opening the hydrothermal reaction kettle; centrifugally collecting a product; washing with de-ionized water and absolute ethyl alcohol respectively; and drying to obtain the final product, i.e., the pencil-shaped gamma-MnS microcrystal. According to the preparation method, a simple ultraviolet-assisted microwave hydrothermal method preparation process is adopted; the reaction period is short; the energy consumption is low; the reaction is finished in a liquid phase in two steps; and no post-treatment is required. The prepared gamma -MnS microcrystal has a regular pencilshape and more uniform size.

The invention relates to a vegetal bait culture method. Algae seeds carry out primary and secondary culture, the culture used seawater carries out sterilization treatment, the primary culture lasts 7 to 10 days, and steps for adding nutrient salt kangwei ingredients into per 100 mL materials are as follows: preparing first solution with the following ingredients by weight ratio: 50g of ferric trichloride, 1.8g of manganese chloride, 168g of boric acid, 225g of tetrasodium ethylenediamine tetraacetate, 100g of monopotassium phosphate and 500g of sodium borate; preparing second solution with the following ingredients by weight ratio: 0.5g of zinc butter, 0.5g of cobalt chloride, 0.25g of ammonium molybdate and 0.5g of bluestone; pouring the second solution into the first solution; adding vitamin B1 and B12; carrying out secondary culture for 0.5 to 1 month; and maintaining the air inflation, wherein the added culture mother solution comprises the following ingredients by weight ratio: 50g of sodium nitrate, 5g of monopotassium phosphate, 0.5g of ferric ammonium citrate and 100ml of disinfected seawater. When the vegetal bait culture method of the invention is adopted, the production cost can be lowered, and the yield can be improved.

The invention discloses a fruit ripening retardant for jujube, and the fruit ripening retardant comprise the following raw materials in parts by weight: 0.5-0.9 part of gibberellin, 0.2-0.4 part of 6-benzyladenine, 0.7-1.0 part of rhodofix, 11-15 parts of urea, 6-10 parts of sodium borate, 3-6 parts of copper chloride, 5-8 parts of iron chloride, 6-8 parts of manganese chloride, 5-7 parts of zinc chloride, 10-15 parts of ethanol and 1000 parts of pure water. The preparation disclosed by the invention is prepared by firstly dissolving the gibberellin with the ethanol, then sequentially adding the 6-benzyladenine and the rhodofix, uniformly stirring, then completely pouring into the pure water, then adding the urea, the sodium borate, the copper chloride, the iron chloride, the manganese chloride and the zinc chloride into the pure water, fully stirring and uniformly mixing. By applying a solution of the preparation disclosed by the invention, which is diluted by 10-20 times on jujube fruits during the white-mature period, compared with a control group, the fruit ripening can be delayed by 18 days, the cracking fruit rate can be reduced by above 32%, the incidence rate of black spots is reduced by above 25%, and the content of soluble sugar of the jujube fruits and the single fruit weight can be further significantly improved.

The invention discloses a method for preparing manganese-doped basic cobalt carbonate. The method comprises the following steps: adding a sodium carbonate solution and a cobalt chloride solution intoa reaction kettle, controlling the pH value of the reaction system within 6.0-7.8, controlling the reaction temperature to 90-95 DEG C, and performing stirring to react for 5-6 hours so as to obtain basic cobalt carbonate slurry; and dehydrating the basic cobalt carbonate slurry while the basic cobalt carbonate slurry is hot, transferring the dehydrated basic cobalt carbonate slurry into an immersion kettle, adding a saturated manganese chloride solution into the immersion kettle, performing a stirring reaction, and performing filter pressing dehydration and drying in sequence so as to obtainthe manganese-doped basic cobalt carbonate. Therefore, sodium carbonate is adopted to replace ammonium bicarbonate to prepare basic cobalt carbonate to serve as an ultrafine cobalt powder precursor, ammonia-containing wastewater is not generated, no pollution is caused to the atmosphere, the impurity content of the prepared precursor is low, and the production requirement of cobalt powder on the current market can be met; and moreover, saturated manganese chloride is adopted to dope basic cobalt carbonate, so that the conductivity of the basic cobalt carbonate precursor can be enhanced, and the stability is improved.

The invention aims to provide a preparation method for a Mn3o4 hollow micronano cubic block. According to the method, the Mn3o4 hollow micronano cubic block can be synthesized by using a cheap raw material to prepare a metal-organic framework (MOF) template through simple liquid phase reaction and then performing alkali processing on the MOF template. Manganese chloride, an alcohol solution of methylamine and anhydrous formic acid are used as reactants, PVP-K30 is used as a surfactant, the MOF template is synthesized under a room template by liquid phase reaction, and the MOF template is processed by an alkali liquid under a hydrothermal condition to prepare the Mn3o4 hollow micronano cubic block. Liquid phase chemical reaction is taken as a basis, the MOF template is synthesized by using the cheap and available raw material, and the Mn3o4 hollow micronano cubic block is prepared by simple hydrothermal reaction. The preparation method is simple, mass production is easy to achieve, so that the preparation method has very wide application prospect.

The invention relates to the technical field of electroplating, in particular to novel manganese-based permanent magnet electroplate liquid and a preparation method thereof. The electroplate liquid comprises, by mass concentration, 30-60 g / L of boric acid, 30-60 g / L of sodium hypophosphite, 10-40 g / L of complexing agents, 3-5 g / L of ascorbic acid, 5-20 g / L of ferric salt, 10-40 g / L of manganese chloride, 2-8 g / L of bismuth chloride, 0.1-0.8 g / L of cerium chloride and the balance deionized water. The electroplate liquid is good in stability, and an alloy coating obtained by using the electroplate liquid is attractive in color and luster and good in magnetic performance.