910 results about "Nickel nitrate hexahydrate" patented technology

The invention discloses a preparation method of a ferro-nickel bi-metal hydroxide of a sheet structure on foamed nickel through in-situ growth, and belongs to the field of electrochemistry. Nickel nitrate hexahydrate, iron nitrate nonahydrate, urea, ammonium fluoride and foamed nickel are adopted as main raw materials, and an electrocatalyst through water electrolysis oxygen production is successfully prepared. The sheet structure of the catalyst supplies abundant active sites, due to existence of substrate foamed nickel, the electrical conductivity is enhanced, and when the hydroxide is adopted as the electro-catalysis oxygen production catalyst, the excellent catalysis activity is shown. The activity of a traditional non-noble metal material under an oxygen evolution reaction (OER) in analkaline electrolyte is not ideal. Accordingly, the OER catalysis performance of the non-noble metal material under the alkaline condition is improved, and the method is of great significance in solving the fossil fuel energy crisis. Nickel and iron earth reserve volumes are quite abundant, the OER catalytic performance of the ferro-nickel bi-metal hydroxide of the sheet structure under the alkaline condition is excellent, and the hydroxide is a catalytic material with the wide prospect.

The invention relates to a loaded type nickel-based catalyst used for slurry bed methanation, and a preparation method and an application thereof. The loaded type nickel-based catalyst is composed of, by weight, 10-40 wt% of NiO, 56-90 wt% of a carrier and 0-4 wt% of an auxiliary agent. The loaded type nickel-based catalyst is prepared by the steps of preparing a soluble salt solution of 0.5-1.3 g/mL nicdel nitrate and the auxiliary agent; adding a catalyst carrier and a soluble organic fuel to the salt solution in sequence; impregnating for 6-24 h while stirring; heating the solution for concentration in a water bath with a temperature of 60-90 DEG C after finishing the impregnation, or heating for igniting the solution at a temperature of 300-700 DEG C directly; collecting the combustion residue powder, grinding the powder and granulating, and reducing for 2-6 h with a reducing gas on a fixed bed at a temperature of 500-700 DEG C. The loaded type nickel-based catalyst has a slurry bed methanation process, and has the advantages of good and stable catalytic performance, and can be used for large-scale industrialization.

The invention relates to a preparation method of a NiCo2S4-coated porous carbon skeleton for a positive electrode material of a lithium-sulphur battery. The preparation method comprises the followingsteps: preparing a nitrogen-doped porous carbon skeleton; preparing a C@NiCo-LDH composite material: adding the nitrogen-doped porous carbon skeleton prepared in the last step, cobalt nitrate hexahydrate, nickel nitrate hexahydrate, urotropin and sodium citrate according to the molar ratio of (10-15): (60-120): (30-60):30:10 into deionized water, after stirring uniformly, carrying out oil bathingat a temperature of 70-90 DEG C, carrying out condensation and returning for 3-6 hours, centrifuging reaction products using the deionized water and alcohol, drying to obtain the NiCo-LDH-coated porous composite material which is marked as C@NiCo-LDH; preparing the C@NiCo2S4 composite material; and loading sulfur on the C@NiCo2S4 composite material.

The invention discloses a bi-component supported catalyst of ethanol condensed n-butanol and a method of preparing thereof. The main active ingredients of the catalyst are as follows by weight percentage content: 2%-10% nickel, 0.5%-9% cocatalyst MgO or KF. The preparing method comprises the steps of: directly dipping 30-50 grams of granulose gamma-Al2O3 into nickel acetate or nickel nitrate aqueous solution with consistency being 0.5-1.0 mol/L, dipping for 2 to 4 days, occasionally stirring, evaporating, drying under 130 degrees centigrade, then dipping into magnesium nitrate or potassium fluoride aqueous solution with consistency being 0.1-1.0 mol/L for 2 to 3 days, evaporating, drying under 130 degrees centigrade to prepare the bi-component supported catalyst of ethanol condensed n-butanol. The method of preparing bi-component supported catalyst in the invention is simple and has low cost; the catalytic activity is higher than that of the single component nickel supported catalyst; the selectivity of the n-butanol in the products can achieve above 70% and has wildly industrialized application prospect.

The present invention is preparation process of carbon nanotube reinforced copper-base composite material with high strength and high conductivity, and belongs to the field of copper-base composite material preparing technology. The preparation process includes the following steps: adding nickel nitrate hexahydrate, yttrium nitrate hexahydrate and ethanol soaked copper powder in certain weight proportion into distilled water to obtain nickel nitrate solution; dropping sodium hydroxide solution to the nickel nitrate solution to produce neutralizing reaction obtaining ternary Ni(OH)2/Y(OH)3/Cu colloid; washing, filtering, drying, grinding and calcining to obtain Ni/Y/Cu catalyst precursor; setting the precursor into reaction furnace, introducing H2 to reduce, and introducing N2 and reaction gas for catalytic cracking reaction to obtain composite carbon nanotube/Cu powder; initially pressing the composite powder, sintering and re-pressing to obtain carbon nanotube in-situ reinforced copper-base composite material.

The invention discloses a shell metal stamping part surface treatment technique which comprises the following steps: 1) mixing 65 parts by mass of ethanedioic acid, 7 parts by mass of zinc nitrate, 5 parts by mass of sodium molybdate, 2.3 parts by mass of nickel nitrate, 2 parts by mass of coconut diethanol amide, 3 parts by mass of phytic acid and 2 parts by mass of dodecyl trimethyl ammonium sulfate, and reacting at 115 DEG C for 3 hours to obtain a metal surface treating agent; 2) mixing 17 parts by mass of metal surface treating agent and 136 parts by mass of water to obtain a surface treatment working fluid; and 3) heating the surface treatment working fluid to 54 DEG C, and putting the metal stamping part in the surface treatment working fluid to perform surface treatment for 27 minutes. The surface treatment technique can enhance the oxidation resistance and corrosion resistance of the metal stamping part.

The invention provides a preparation method of a self-supporting ferronickel layered double hydroxide sulfide electrocatalyst. The preparation method comprises the steps of pretreating original foamednickel to obtain purified foamed nickel; dissolving nickel nitrate hexahydrate, iron nitrate nonahydrate and urea into deionized water according to a preset proportion to obtain a mixed solution, wherein the concentration of cations in the mixed solution is 40-45 mmol/L, and the concentration of urea in the mixed solution is 130-150 mmol/L; carrying out primary hydrothermal reaction on the mixedsolution to obtain NiFe LDH/NF; putting the NiFe LDH/NF into a thioacetamide solution, and carrying out a secondary hydrothermal reaction to obtain NiFe LDH-Sx/NF, wherein x is any number from 1 to 8.According to the preparation method of the self-supporting ferronickel layered double hydroxide sulfide electrocatalyst provided by the invention, the electrocatalyst shows excellent oxygen evolutionreaction catalytic activity under an alkaline condition, a ferronickel double hydroxide nanosheet structure directly growing on foamed nickel is beneficial to electron transfer, the catalytic surfacearea is increased, and the catalytic active sites are improved, so that diffusion of oxygen evolution reaction is facilitated.

The invention relates to a preparation method of three-dimensional flower-shaped nickel cobaltate nano-sheet mesoporous microspheres, and relates to the technical field of multi-level structured nano-grade catalyst materials. First, nickel nitrate hexahydrate and cobalt nitrate hexahydrate are adopted as a nickel source and a cobalt source, a deionized water-isopropanol mixed phase with a proper proportion is adopted as a solvent, methanol is adopted as a reactant, and no additional base precipitating agent is adopted; a three-dimensional flower-shaped nano-sheet microsphere precursor is prepared in a Ni<2+>-Co<2+>-NH3-NH4<+>-SG<n->-H2O-IPA-CH3OH system (SG<n-> is CO3<2-> or HCOO<->); the temperature is increased to 300-400 DEG C in an air atmosphere with a speed of 1 DEG C/min, and the precursor is calcined for 2-3h, such that the three-dimensional flower-shaped nickel cobaltate nano-sheet mesoporous microspheres are obtained. According to the invention, co-precipitation of the formulated cobalt and nickel in the raw materials is realized. The prepared three-dimensional flower-shaped nickel cobaltate nano-sheet mesoporous microspheres are spinel cubic phases with high purity, and are formed by ultrathin nano-sheet self-assembly. The microspheres comprise rich mesopores, and have a large specific surface area. The method has the advantages of simple operation, appropriate conditions and easy control.

The invention discloses a nano-nickel catalyst loaded on grapheme and a preparation method thereof. The catalyst adopts grapheme as a carrier, which is loaded with 1 mass percent-10 mass percent of nickel particles with a particle size of 5-10nm. The preparation method comprises the steps of: preparing the purchased or self-made grapheme into an ethanol solution, preparing a precursor of grapheme-loaded nickel oxide with an ethanol solution of nickel nitrate hexahydrate and an ethanol solution of grapheme, reducing the precursor so as to obtain the nano-nickel catalyst loaded on grapheme. Grapheme with high strength, big specific surface area and stable structure is taken as the catalyst carrier, and the catalyst has high activity, long service life. Also nickel particles loaded on grapheme have a small size and centralized size distribution ranging from 5 to 10nm. And nickel nano-particles are uniformly dispersed on the grapheme carrier. The preparation method provided in the invention has the advantages of simple preparation process, easy operation, low cost, and less pollution.

The invention provides a preparation method of bimetallic nano-phosphate based on a metal-organic framework, which comprises the following steps of: using cobalt nitrate and 2-methylimidazole as raw materials to prepare a metal-organic framework, and then using another nitrate, that is, nickel nitrate to treat the metal-organic framework to form a layered double hydroxide on the metal-organic framework to maintain the morphology of the metal-organic framework, to achieve a conformal transformation, and to obtain a precursor. According to the bimetallic nano-phosphate based on the metal-organicframework and the preparation method and the application thereof, the obtained precursor is etched by using phosphate, and a hollow core shell structure formed increases the specific surface area ofthe material and the capacitance performance is high accordingly. The preparation method of the bimetallic nano-phosphate based on the metal-organic framework has the advantages that the raw materialsare cheap and easy to obtain, the operation is simple, the high energy consumption is avoided, and the bimetallic nano-phosphate obtained has high capacitance performance and can be used for preparation of capacitor elements.

The invention discloses a preparation method for synthesizing a three-dimensional graphene reinforced nickel-based composite material in situ. The preparation method comprises the following steps of: taking glucose or citric acid as a carbon source, taking nickel nitrate hexahydrate as a nickel source, and combining a soluble salt template NaCl to co-mix and dissolve into a deionized water solution, thereby obtaining a light green uniform solution; performing freeze-drying and grinding treatment to obtain powder; putting the powder into a constant-temperature region of a high-temperature tubular furnace to synthesize to obtain mixed powder of sodium chloride-three-dimensional graphene loaded nickel; washing the mixed powder until sodium chloride is completely removed, and performing drying treatment to obtain nano nickel modified three-dimensional graphene powder; and uniformly coating nano nickel modified three-dimensional graphene composite powder with basic nickel nitrate to obtain composite powder of three-dimensional graphene nickel powder.

The invention relates to a solid catalyst used for the preparation of propylene through the oxidation-dehydrogen of propane and a preparation method thereof, providing a solid catalyst that can create moderate reaction condition and good catalytic performance for the preparation of propylene through the oxidation-dehydrogen of propane and the preparation method of the catalyst. The catalyst comprises a main material and an additive, the main material is phosphor-molybdic heteropolyacid alkali metal salt- nickel oxide compound material or phosphor-molybdic heteropolyacid alkaline earth metal- nickel oxide compound material. The preparation method is that: citric acid is prepared into a water solution, added with an alkali metal carbonate or alkaline earth metal carbonate solution, nickel nitrated hexahydrate, and a H3PMo12O40 solution till the mixture is gelatinous, and dried to obtain a foamy solid; the foamy solid is ground, roasted and pelletized. The preparation method may also be that: citric acid is prepared into a water solution, added with nickel nitrate hexahydrate, stirred till the mixture is gelatinous, and dried to obtain a foamy solid; the foamy solid is ground and roasted to acquire a nano nickel oxide, then nano nickel oxide is added into a H3PMo12O40 solution, stirred while the alkali metal carbonate solution or alkaline earth metal carbonate solution is added, and evaporated till dryness, ground, roasted and pelletized.

The invention relates to a method for manufacturing a porous flaky NiCo2O4 and grapheme composite capacitive material, and belongs to the field of nano composite material manufacturing. According to the method, a graphite oxide, cobalt nitrate and nickel nitrate are dissolved in deionized water in an ultrasonic mode and stirred, a certain amount of hexamethylene tetramine is added, a reflux reaction is carried out for 3-4 hours at the temperature of 90 DEG C, sediments are collected, the collected sediments are calcined in an air atmosphere for 2 hours at the temperature of 330 DEG C, and the porous flaky NiCo2O4 and grapheme nano composite material is obtained. In the manufactured porous flaky NiCo2O4 and grapheme composite capacitive material, porous flaky NiCo2O4 is completely attached to the surface of a grapheme piece. By means of the composite structure, conductivity of the material is improved, and the contact area of the material and an electrolyte solution is greatly improved, so that the composite material has high specific capacitance and good electrochemical stability and can be possibly used as a super-capacitor electrode material.

The invention relates to a method for preparing multi-shape controllable nano nikel-cobalt spinel oxide. The method includes the steps that nickel nitrate and cobalt nitrate are dissolved in anhydrous ethanol according to the cobalt-nickel atom ratio to form a solution A; oleylamine is dispersed in an ethanol solution to form a solution B, and the solution B and the solution A are mixed to obtain a mixed solution; the mixed solution is fully and evenly stirred and moved into a dynamic reaction kettle, H2 is replaced in a sealed mode, pressure intensity of H2 is adjusted to 6-15 bar after replacement, and a steel cylinder air outlet valve is closed; the stirring speed of the dynamic reaction kettle is adjusted to 400 r/min, temperature is set to be 150 DEG C, and reaction is carried out for 10 h; a product is cleaned through ethanol and other nonpolar solvents respectively, centrifugal separation is carried out, and a sediment precursor is obtained through drying at the temperature of 60 DEG C; the temperature of the obtained sediment precursor rises in an air atmosphere at the speed of 10 DEG C/min, and the sediment precursor is heated to 200-400 DEG C and kept warm. According to the method, procedures are few, materials are easy to get and low in price, the procedures are safe, nikel-cobalt spinel oxide of different shapes can be obtained by changing a small condition in the procedures, and accordingly preparing of the controllable nano nikel-cobalt spinel oxide is achieved.

The invention specifically relates to an enamel glaze material, an enamel slurry, and a preparation method and an application thereof. The invention relates to the technical field of enamel materials. The invention aims at solving a technical problem of providing an enamel glaze material. The enamel glaze material is prepared by uniformly mixing the following raw materials, by weight: 40-45 parts of quartz sand, 9.5-10 parts of feldspar powder, 24-26 parts of borax, 2.5-3 parts of cryolite, 5.5-7.5 parts of sodium nitrate, 3.5-4 parts of lithium carbonate, 3.5-4.5 parts of fluorite powder, 2-4 parts of calcium carbonate, 3-4 parts of cobalt nitrate, 0.8-1.2 parts of nickel nitrate, 2-2.2 parts of manganese oxide, and 3.4-3.8 parts of zirconium dioxide. The enamel glaze material can be combined well with glass powder to produce the enamel slurry. The enamel slurry can be coated on the surface of a metal substrate to form an enamel coating. The coating has the advantages of smooth glaze surface, good gloss, no bubble, and no scaling. The coating can be firmly combined with a carbon steel substrate, and has good acid resistance.

The invention provides a photocatalyst and a preparation method thereof, and particularly relates to a reducing catalyst for hydrogen production via water decomposition and carbon dioxide reduction at the same time under visible light photocatalysis and a preparation method thereof. The invention provides a photocatalyst for photocatalytic reduction of carbon dioxide to organic matters and simultaneously hydrogen production via water decomposition under sunlight. The photocatalyst is Ni/La2O2CO3. The preparation method comprises the following steps: preparing a lanthanum nitrate solution and a nickel nitrate solution respectively, synthesizing LaNiO3 by the conventional complexation method, that is, mixing the lanthanum nitrate solution, the nickel nitrate solution and citric acid and allowing reactions under infrared radiation to form a gel, pre-calcining and calcining the gel to obtain perovskite LaNiO3, and activating the perovskite LaNiO3 in a fixed bed reactor to obtain the finial Ni/La2O2CO3.

The invention discloses a preparation method of a foamy copper/carbon nanophase composite negative electrode material for a lithium ion battery. The method comprises the steps that the foamy copper is obtained through the processes of mixing NaCl particles and electrolytic copper powder, briquetting the mixture into blanks, sintering the blanks, dissolving out the NaCl particles and reducing under the protection of hydrogen; the foamy copper loaded with a catalyst precursor is obtained by immersing the foamy copper in a catalyst solution prepared by nickel nitrate, yttrium nitrate or cobalt nitrate and calcining the foamy copper loaded with the catalyst; and the foamy copper/carbon nanophase composite electrode material is obtained via reduction of the foamy copper loaded with a catalyst precursor and growth in acetylene. The method is advantageous in that foamy copper with controllable porosity and aperture is employed as a current collector; and carbon nanophase with different morphologies which has good quality and high purity is grown on the foamy copper current collector directly by controlling doping and growing processes of the catalyst. The method is simple in preparation process, and is easy to realize and popularize. The composite negative electrode material has low preparation cost and good electrochemical performance.

The invention provides a preparation method of a three-dimensional mesoporous NiCo2O4/nitrogen-doped graphene composite electrode material. The preparation method comprises the following steps: step 1, implementing ultrasonic dispersion on graphene oxide in an acetonitrile system to obtain a uniform graphene oxide solution A; step 2, transferring the solution A to a polytetrafluoroethylene hydrothermal reactor to implement constant-temperature thermal reaction, and completing the reaction to obtain mixed liquid B; step 3, implementing extraction filtration, washing and drying on the mixed liquid B to obtain a product C; step 4, implementing uniform ultrasonic dispersion on the product C, cobalt nitrate hexahydrate, nickel nitrate hexahydrate and hexamethylenetetramine to obtain mixed liquid D; step 5, transferring the mixed liquid D to the polytetrafluoroethylene hydrothermal reactor to implement constant-temperature thermal reaction, and filtering and washing the liquid to obtain a nickel cobaltate precursor E; and step 6, putting the precursor E into a tubular furnace, and implementing calcination at an air atmosphere to obtain a reaction product namely the three-dimensional mesoporous NiCo2O4/nitrogen-doped graphene composite electrode material. The preparation method provided by the invention is mild in reaction condition, easy to control, low in cost, and simple and convenient in process and procedure.

The invention discloses a pole lug aluminum strip surface treatment passivation solution. The pole lug aluminum strip surface treatment passivation solution comprises chromium trioxide, nickel nitrate hexahydrate, a pickling agent, a film formation accelerant and water. By means of the pole lug aluminum strip surface treatment passivation solution, the passivation film compactness and the salt mist can be improved, and the bonding performance between a film and pole lug glue can be improved.

The invention discloses a preparation method of a capacitor electrode material beta-NiMoO4. The method comprises the following steps: (1) adding sodium molybdate dehydrate and nickel nitrate hexahydrate to ultrapure water, adding ammonium hydroxide to adjust pH to be 7-8, and stirring and mixing the ammonium hydroxide until the solution is clear; (2) putting plain carbon cloth and/or a carbon fiber into an air-tight reaction container, and adding the mixed solution prepared in the step (1) for sealing; (3) heating the air-tight reaction container prepared in the step (2) in thermostatically controlled heating equipment, and growing a beta-NiMoO4 nanowire on the carbon cloth; and (4) cooling the air-tight reaction container in the step (3) to a room temperature, taking out the carbon cloth, cleaning and drying the carbon cloth, and then burning the carbon cloth in the air to obtain the carbon cloth or carbon fiber with the beta-NiMoO4 nanowire. The invention further discloses an application of the capacitor electrode material in the super capacitor. The capacitor electrode material is relatively few in controllable parameters, low in cost, mild in reaction condition, high in conductivity, good in capacitance characteristics, high energy density and power density, and relatively long in cycle lifetime.

The invention discloses a method for improving charge-discharge cycling capacity of zinc ferrite by doping nickel element and application, and relates to the field of lithium ion battery anode composite material preparation. The method comprises the following steps: forming a ternary metallic oxide by doping the nickel element in zinc ferrite, selecting and using, and mixing and stirring nickel nitrate hexahydrate, zinc nitrate hexahydrate, ferrous sulfate septihydrate, urea and ammonium fluoride according to a certain molar mass ratio to form a uniform mixed solution; and carrying out hydro-thermal synthesis and calcinations to obtain NixZn1-xFe2O4(x being greater than 0 and smaller than 1) metallic oxide. According to the method, the NixZn1-xFe2O4(x being greater than 0 and smaller than 1) metallic oxide with excellent electrochemical performance can be prepared; and moreover, the synthetic method is relatively simple, low in energy consumption, good in controllability, high in yield and low in cost, and is applicable for large-scale production. The invention also discloses application of the NixZn1-xFe2O4(x being greater than 0 and smaller than 1) metallic oxide, the NixZn1-xFe2O4(x being greater than 0 and smaller than 1) metallic oxide is used for lithium ion battery anode materials, and the metallic oxide has the characteristics of high charging and discharging specific capacity and high cycling stability.

The invention relates to a method for preparing a carbon nano tube enhanced titanium-base compound material by in-suit reaction in order to solve the problems of low uniform dispersion and low structural completeness of a carbon nano tube in the conventional method for preparing the carbon nano tube enhanced titanium-base compound material and pollution to the titanium-base material caused by reaction of a carbon group and a titanium base body. The method comprises the following steps of: adding nickel nitrate hexahydrate and TiH2 powder into an ethanol solution, stirring and evaporating to obtain Ni-TiH2 compound powder; paving the Ni-TiH2 compound powder in a quartz boat, putting the quartz boat into deposition equipment, feeding H2, raising temperature, feeding CH4, and after the deposition is finished, stopping feeding the CH4 so as to obtain carbon nano tube/TiH2 compound power; pressing the carbon nano tube/TiH2 compound power into a block body, sintering, and re-pressing to obtain the carbon nano tube enhanced titanium-base compound material. Carbon nano tubes in the compound material are uniform to disperse and cannot be aggregated; the compound material is high in purity and has a complete structure; and reaction between the titanium and the defected carbon nano tube can be avoided.

The invention discloses a preparation method of a Ni-based catalyst modified by an aid Pt supported by multi-wall carbon nanotubes as a carrier and application. The preparation method comprises the following steps: firstly, performing acid modification on multi-wall carbon nanotubes by using nitro-sulfuric acid; by taking the multi-wall carbon nanotubes as a carrier, putting precursor salts of platinum and nickel according to the multi-wall carbon nanotubes to hexachloroplatinic acid hexahydrate and nickel nitrate hexahydrate according to a mass ratio of (5-10):(0.1-0.5):(5-10); further addingdeionized water, performing ultrasonic stirring, drying, and performing roasting and reduction, thereby finally obtaining an expected catalyst Pt-Ni/MWCNT. The catalyst prepared by using the method is low in cost, economic and effective, good in universality, good in environmental-friendliness, free of equipment corrosion and good in circulation property, and is relatively high in activity and relatively high in p-aminophenol selectivity under a relative gentle reaction condition in a process that p-aminophenol is prepared from nitrobenzene through one-step hydrogenation rearrangement, the production conditions can be improved, the production cost is reduced, and the product quality is improved.