114 results about "COBALTOUS CHLORIDE HEXAHYDRATE" patented technology

This patent uses cotton cloth as raw material, carbonizes it into carbon cloth, and obtains flexible supercapacitor electrode base material with high specific surface area, oxyge functional groups andgood mechanical properties then through mixed acidification treatment. The obtained treated carbon is added into ferric trichloride hexahydrate, Cobalt chloride hexahydrate, nickel chloride hexahydrate and ethanol solution after a period of time, ammonium bicarbonate is added and continuously stirred, after that reaction is completed, the mixture is washed with deionize water several times, dried, calcined in a high-temperature tubular furnace for a period of time, and taken out after the mixture is cooled to room temperature, so as to prepare an iron cobalt nickel oxide/carbon cloth composite flexible electrode material. By adjusting the reaction time and the amount of iron, cobalt and nickel sources to control the loading amount and morphology of multicomponent transition metal oxides,the flexible supercapacitor electrode materials with good flexibility and excellent electrochemical performance were prepared.

The invention provides a cobalt sulfide material, a preparation method and application of the cobalt sulfide material. The cobalt sulfide material is prepared by the following steps: (1) mixing dimethyl aminodithioformic acid with cobalt chloride hexahydrate according to a mole ratio of 2 to 1 in water for reaction, thus obtaining a first product; (2) under the protection of inert gas, carrying out reaction on the dried first product at 500 to 900 DEG C for 2 to 3 hours, thus obtaining the cobalt sulfide material. The cobalt sulfide material provided by the invention can be applied to the field of hydrogen production from water through electro-catalysis.

The invention discloses a preparation method of different morphologies of cobalt monoxide nanometers loaded with foam nickel. The preparation method comprises: placing sheet-like foam nickel in an ultrasonic washing machine, washing, placing the washed foam nickel in a drying box, and drying; dispersing cobalt chloride hexahydrate powder into a dispersion solvent added with urea, and magneticallystirring at a room temperature to form a suspension; transferring the suspension to a high-pressure hydrothermal reaction kettle, obliquely placing the dried sheet-like foam nickel into the high-pressure hydrothermal reaction kettle, sealing the high-pressure hydrothermal reaction kettle, placing the high-pressure hydrothermal reaction kettle into the drying box, carrying out thermal insulation for 15-18 h at a temperature of 160-200 DEG C, and naturally cooling to a room temperature; taking the foam nickel out of the high-pressure hydrothermal reaction kettle, placing into the ultrasonic washing machine, washing, placing into a vacuum drying box, and drying to obtain a precursor; and calcining the precursor for 3-4 h at a calcination temperature of 400-520 DEG C.

The invention discloses a preparation method for a self-support ferrocobalt phosphide nanosphere electrocatalyst, and relates to the preparation method of the electrocatalyst. The preparation method comprises the steps that firstly, commercial cobalt chloride hexahydrate, ferric trichloride hexahydrate, ammonium fluoride and urea are weighed, a nickel net is adopted, then the weighed reagents aremixed and stirred to obtain a mixed reagent, a reaction is conducted for some time in a reaction kettle, and a precursor is obtained; the obtained precursor is calcined in a tube furnace, and CoFeP isobtained. The preparation method is low in cost, the preparation technology is simple, ferrocobalt phosphide nanospheres have the larger specific surface areas, and more active sites are exposed. When the molar ratio of an iron source to a cobalt source is 1:2, the reaction is conducted for 10 hours in a drying oven, the ferrocobalt phosphide nanospheres have good stability and good catalytic activity, no other adhesive agents are needed, and electron transmission is increased. The preparation method is applied to the field of fossil fuel.

The invention provides a protein-based carbon/magnetic Fe Co nanoparticle composite wave-absorbing agent and a preparation method and application thereof, and belongs to the technical field of wave-absorbing materials. The preparation method of the protein-based carbon/magnetic Fe Co nanoparticle composite wave-absorbing agent comprises the following steps: 1) mixing water, ferric chloride hexahydrate, ferrous chloride tetrahydrate and cobalt chloride hexahydrate, and reacting for 1-2 h at the temperature of 70-100 DEG C to prepare magnetic nanoparticles; 2) mixing the magnetic nanoparticles with egg white liquid, and curing to obtain a protein-magnetic nanoparticle compound; 3) carbonizing the protein-magnetic nanoparticle compound obtained in the step 2) to obtain the protein-based carbon/magnetic Fe Co nanoparticle composite wave-absorbing agent. The material prepared by using the composite wave-absorbing agent has strong wave-absorbing performance, meanwhile has the characteristicsof wide wave-absorbing frequency band, small matching thickness of an absorber and the like, and has a large application prospect in the field of wave-absorbing materials.

The invention relates to a preparation method of an ultralow platinum-loading capacity Pt-CoP/C anode electrocatalyst for a high-activity high-stability direct methanol fuel cell, and belongs to the technical field of fuel cells. The preparation method comprises the following steps: dispersing a carrier and cobalt chloride hexahydrate into water, carrying out ultrasonic dispersion, stirring, and then evaporating to obtain a first composite carrier; mixing and grinding the first composite carrier and sodium hypophosphite hydrate, reacting for 1 hour, and washing and drying to obtain a second composite carrier; dispersing the second composite carrier into ethanediol, adding chloroplatinic acid, carrying out the ultrasonic dispersion, and stirring to obtain a first suspension liquid; stirring the first suspension liquid at room temperature, regulating a pH value through sodium hydroxide to obtain a second suspension liquid; carrying out microwave radiation on the second suspension liquid, and washing and drying to obtain the loading type platinum catalyst. The platinum catalyst prepared by adopting the preparation method disclosed by the invention has very high catalytic activity and stability on methanol electrooxidation and can be used for reducing the loading capacity of noble metal platinum. The preparation method disclosed by the invention has the advantages of easiness for operation, short preparation period and suitability for large-scale production.

The invention provides a preparing method for an oxide dispersion strengthening iron-cobalt-nickel medium-entropy alloy. A dispersion strengthening phase is yttrium oxide. Ferric trichloride hexahydrate serves as an iron source, cobalt chloride hexahydrate serves as a cobalt source, nickel chloride hexahydrate serves as a nickel source, yttrium nitrate hexahydrate serves as a yttrium source, a sodium hydroxide solution serves as a precipitator, and iron, cobalt, nickel and yttrium ions generate corresponding hydroxide coprecipitation. Then, obtained precipitation is washed, dried and roasted,and ferric hydroxide, cobaltous hydroxide, nickelous hydroxide and yttrium hydroxide in the precipitation are decomposed into corresponding oxide. The roasted oxide powder is subjected to high-temperature reducing in the hydrogen atmosphere, and since yttrium oxide cannot be reduced, the mixture powder of iron, cobalt, nickel and yttrium oxide is finally obtained. The obtained powder is sintered,and the oxide dispersion strengthening iron-cobalt-nickel medium-entropy alloy is obtained.

The invention relates to a preparation method of cobalt sulfide/three-dimensional nitrogen-doped macroporous graphene and a negative electrode material of a lithium ion battery in the field of electrode materials. According to the preparation method, firstly, urea serving as a nitrogen source and graphene oxide are adopted for forming three-dimensional nitrogen-doped macroporous graphene; secondly, with cobalt chloride hexahydrate as a cobalt source, thiourea as a sulfur source and a mixture of ethylene glycol and water as a solvent, a simple solvothermal method is adopted for in-situ synthesis of a CoS/3DNMG composite material, wherein the CoS/3DNMG composite material is used as an active material of a negative electrode of the lithium ion battery. According to the CoS/3DNMG composite material prepared by means of the method, CoS is uniformly loaded on the pores and surface of three-dimensional nitrogen-doped macroporous graphene; the rich pore structures of three-dimensional nitrogen-doped macroporous graphene effectively buffer the volume expansion of cobalt sulfide in the charging and discharging process, transfer paths of electrons and ions are shortened in the charging and discharging process, and the migration rate of the lithium ions is increased; more defects are introduced into lattices of three-dimensional macroporous graphene through doping of nitrogen atoms, and the electrode reaction can be accelerated.

The invention discloses a novel chemical synthesis method for preparing mecobalamine. The novel chemical synthesis method comprises the steps of: dissolving cyanocobalamin and cobalt chloride hexahydrate in deionized water to obtain reaction liquid, simultaneously dropwise adding a sodium borohydride aqueous solution and a methanol/formaldehyde solution to the reaction liquid, and generating mecobalamine in one step through reductive methylation. According to the novel chemical synthesis method, the cyanocobalamin is taken as a raw material, and the mecobalamine is synthesized in one step; and therefore, the novel chemical synthesis method is simple in operation and has low requirements on equipment, little pollution and wide application prospect, and conditions are easy to control.

The invention relates to a treating fluid for treating nitric oxide in a waste gas, wherein the treating fluid is prepared from a reactant, a complexing catalyst and desalted water; the reactant is selected from one of ammonium hydroxide or urea or a combination of two; the complexing catalyst is formed by preparing a complexing agent or transition metal salt, wherein the complexing agent is selected from one out of or the combination of diethylenetriamine, triethylene tetramine, tetraethylenepentamine, pentaethylenehexamine or polyethyleneimine; the transition metal salt is selected from one out of or the combination of cobalt-nitrate hexahydrate (II) or cobalt chloride hexahydrate (II); the concentration of the reactant in the treating fluid is 1-20%(w%); the concentration of the complexing catalyst in the treating fluid is 1-100mmol/L. The treating fluid for treating nitric oxide in waste gas as well as the treating method which are provided by the invention are high in treating efficiency, discharge no waste fluid, and cannot generate secondary pollution; the treating method is a low-input, environment-friendly and efficient nitric oxide treating technique, and has wide popularization and application values.

The invention discloses a nickel-cobalt-iron ternary metal oxide nano tubular composite material and a preparation method thereof. The preparation method comprises the steps of firstly, pre-treating and drying a carbon fiber fabric; preparing a mixed solution of cobalt chloride hexahydrate, nickel chloride hexahydrate, hexadecyl trimethyl ammonium bromide and urea by using distilled water as a solvent, putting the mixed solution and the carbon fiber fabric into a reactor for hydrothermal reaction, thus obtaining a NiCo2O4 precursor; and adding ferric chloride hexahydrate into the prepared precursor for water bath reaction, thus finally obtaining a NiCo2-xFexO4 nano tubular composite material. Because the prepared composite material has a tubular structure and is a nano particle, the specific surface area of the material is greatly increased, the electrode reaction kinetics is accelerated, and the super capacitive property of the material is improved. The composite material has excellent reversibility and cyclic stability. The preparation method is simple in operation and low in cost, and has a broad application prospect in the fields of energy storage, crystals and the like.

A chain of hollow nanoparticles made of polycrystal noble metal (Au, Pd, or Pt) is prepared through dissolving polyvinyl pyrrolidone in inertial gas and uniform magnetic field while stirring, adding hexahydrated cobalt chloride powder, dropping the aqueous solution of sodium bromohydride, adding the solution of AuCl3, PdCl6 or PtCl6 to obtain coarse product, and purifying.

The invention discloses a nitrogen-doped graphene/cobalt-zinc ferrite composite aerogel wave-absorbing material and a preparation method thereof. Firstly, ferric chloride hexahydrate, zinc chloride and cobalt chloride hexahydrate are used as metal sources, ethylene glycol is used as a solvent, cobalt-zinc ferrite particles are prepared through a solvothermal method, then graphene oxide (GO) is used as a template, ethylenediamine is used as a nitrogen-doped reagent, and the nitrogen-doped graphene/cobalt-zinc ferrite composite aerogel material is prepared through a hydrothermal method. The method is simple to operate, green and environment-friendly, and does not generate any toxic substances. The prepared composite aerogel material is high in electromagnetic wave absorption capacity, wide in absorption frequency band, low in filling ratio and small in matching thickness. Electromagnetic waves of different wave bands can be effectively absorbed by adjusting the nitrogen doping amount ofthe composite aerogel and the thickness of a wave absorbing agent, and the composite aerogel has important application value in the fields of electromagnetic absorption and electromagnetic shielding.

The invention discloses a mononuclear fluorine-substituted bimetal phthalocyanine complex/activated carbon lithium thionyl chloride battery catalytic material and a preparation method thereof. 4-fluorophthalic anhydride, cobalt chloride hexahydrate, copper chloride dehydrate, pitch coke activated carbon and urea which are as raw materials and ammonium molybdate which is used as a catalyst are uniformly ground in a glass mortar and then are placed in a muffle furnace for solid phase sintering to obtain a target product. The method has a simple preparation process, low cost, easily controlled preparation conditions, a short synthesis cycle and uniform compositions. The composite material prepared by the method can increase the ion activation surface area and accelerate electron transport. The high specific surface area of the pitch coke activated carbon, the certain catalytic properties of a pore structure and a microcrystalline structure and the mutual competition and synergistic effects of the bimetal affect the catalytic performance of the composite material together, improve the electrochemical performance of the lithium thionyl chloride electrode material, and reduce contact resistance between interfaces.

The invention discloses a preparation method of a purple ceramic pigment with a cobalt-silicon olivine structure. The preparation method comprises the following steps: tetraethoxysilane and cobalt chloride hexahydrate are taken as main raw materials to prepare sol under the water-bath heating condition according to different cobalt-silicon ratios, and the sol is calcined within the wider temperature range of 1000-1300 DEG C through adding a mineralizer and adjusting the pH value of the system, so that the purple ceramic pigment with the Co2SiO4 olivine crystal structure is obtained. Compared with the traditional solid-phase method, the synthetic method has the characteristics of being simple in technology, low in equipment requirement, convenient to operate, and low in synthesis temperature, the ball milling process is not required, and the pollution caused by impurities is avoided, so that the preparation method has a wide market space.

The invention provides a method for preparing a super-hydrophobic fabric@nickel and cobalt double hydroxide composite material and its application. The method comprises the following steps that cotton fabric is taken, washed to be clean with ethyl alcohol and deionized water and dried in a drying oven for use; nickel chloride hexahydrate, cobalt chloride hexahydrate, hexadecyl trimethyl ammonium bromide and urea are dissolved into the deionized water, mixed liquor A is obtained and transferred into a three-neck flask, a piece of fabric is put into the flask, and microwave treatment is conducted; after reacting is conducted, a product is taken out, washing is conducted with ethyl alcohol, drying is conducted, and fabric@nickel and cobalt double hydroxide is obtained; fabric@nickel and cobalt double hydroxide is immersed in an ethyl alcohol solution of stearic acid, oscillation is conducted in an oscillator at room temperature, and the super-hydrophobic fabric@nickel and cobalt double hydroxide composite material is obtained. The preparation method is simple and easy to operate, short in flow, capable of controlling operation easily and suitable for application and popularization.

The invention relates to a preparation method of a polypyrrole-coated three-dimensional graphene Co3O4 lithium battery negative electrode material. The preparation method comprises the steps of preparing graphene oxide by a Hummers method, and purifying; dissolving the graphene oxide and (K3[Co(CN)6]) in deionized water for uniform mixing; adding (CoCL<2>.6H2O), and performing uniform mixing; adding ((NH4)2S2O8) and pyrrole, and performing stirring and mixing; and placing the obtained product in a tubular furnace, performing heating and calcination in air, and cooling to a room temperature toobtain the polypyrrole-coated three-dimensional graphene Co3O4. Compared with the prior art, the preparation method has the advantages that favorable experiment data and theoretical support are provided for the application of a graphene-based high-molecular polymer-coated metal organic framework composite material in an aspect of a lithium ion battery electrode material.

The invention discloses a fluorine-substituted cobalt phthalocyanine/activated carbon Li/SOCl2 battery catalytic material and a preparation method thereof, 4-fluorophthalic anhydride, cobalt chloridehexahydrate, asphalt coke activated carbon and urea as raw materials and ammonium molybdate as a catalyst are uniformly ground in a glass mortar, and then put into a muffle furnace for solid-phase sintering to obtain the fluorine-substituted cobalt phthalocyanine composite activated carbon catalytic material. The method has the advantages of simple preparation process, low cost, easy control of preparation conditions, short synthesis period, uniform composition and the like. The fluorine-substituted cobalt phthalocyanine composite material prepared by the method can form conductive networks communicated with each other, meanwhile, controllable ordered pores are provided as a micro reaction space, a reaction active site can be at as a central ion, and also can be at a benzene ring connectedwith a fluorine substituent group, the specific surface area of the asphalt coke activated carbon is high, and the pore structure and the microcrystalline structure have certain catalytic performance, so that the discharge time of an electrode material is prolonged, and the interface resistance is effectively reduced.

The invention relates to the field of molybdate and provides a preparation method of a cobalt molybdate powder material adopting a hollow ball structure. The preparation method comprises the following steps: using a dispersant to repeatedly wash yeast powder, and then using an activating agent to reactivate the yeast powder to obtain yeast cells; adding cobalt chloride hexahydrate and stirring for 2-4 h at the temeprature of 40-60 DEG C to enable the yeast cells to fully adsorb cobalt ions, and then adding sodium molybdate dihydrate, stirring at the constant temperature of 35-50 DEG C to obtain a purple sediment; seasoning the solution for 6-14 h at the temperature of 20-30 DEG C, centrifugally separating and drying the purple sediment; calcining the dried powder, and cooling to the room temperature to obtain cobalt molybdate micrometer-sized hollow balls. The hollow-ball powder has the average size of (2.0-4.5)*(1.5-4.0) mum, are about 100-400 nm in wall thickness, and is provided with a hollow part to accommodate a great amount of guest molecules to produce the wrapping effect, thereby achieving excellent physicochemical performance and wide application range.

The invention discloses a nano tubular NiCo2S4@titanium carbide composite material and a preparation method and application thereof. The nano material takes nickel chloride hexahydrate as a nickel source, takes cobalt chloride hexahydrate as a cobalt source, and employs a two-step hydrothermal method. The method comprises the steps: preparing a nano tubular precursor by a first hydrothermal method, wherein at the moment, the two materials are compounded together by the precursor; vulcanizing the precursor through secondary hydrothermal treatment, wherein the material compounds Ti3C2 of a single sheet layer with hollow tubular NiCo2S4 for the first time to prepare a NiCo2S4@titanium carbide composite material, and the NiCo2S4@titanium carbide composite material is applied to research of electrochemical performance of a supercapacitor, and loading modified Ti3C2 on a NiCo2S4 hollow tube to provide an additional electron transmission path, thereby improving the electron transmission efficiency. Experiments show that compared with a single electrode material, the NiCo2S4 and titanium carbide composite electrode material has more excellent specific capacitance and cycle performance.

The invention discloses a method for preparing a Co3O4 nanoribbon. The method comprises the following steps: by taking water as a reaction medium, taking cobalt chloride hexahydrate and urea as raw materials, reacting under water bath conditions, centrifuging and washing the obtained product, and drying, thereby obtaining a controllable ribbon-shaped Co(CO3)0.5(OH).0.11H2O precursor with regular morphology; putting the dried precursor into a muffle furnace, heating to a certain temperature at a certain heating speed, preserving the temperature, and totally converting the precursor into Co3O4, wherein the ribbon structure is not damaged, and the morphology is kept good. The method disclosed by the invention has the advantages that the size, structure and morphology of the Co3O4 nanoribbon prepared by the method are easily controlled, and the prepared Co3O4 nanoribbon has good gas-sensitive and photodegradable performances; and moreover, the preparation method is simple, convenient, easy to operate, low in cost and high in yield, and industrial production is easily realized.

The invention provides a method for preparing a reagent cobalt chloride hexahydrate. The method comprises the following steps of: reacting a metal cobalt slice with a concentrated nitric acid so as to generate a cobalt nitrate, directly reducing the cobalt nitrate by using formaldehyde in the condition of the esistence of hydrochloric acid so as to remove the nitrate radical to generate a cobalt chloride solution, filtering, concentrating and cool crystallizing so as to acquire the cobalt chloride hexahydrate. The method of the invention generates no other impurities except the target products, gas and water in the reaction process, and can obtain pure cobalt chloride hexahydrate. The products acquired by using the method meet the analytically pure standard of GB/T 1270-1996 chemical reagent cobalt chloride hexahydrate. The method has the advantages of simple operation, rapid reaction, short producing flow, high production efficiency, mild process condition, easily controlled property and application in mass commercial process.