67 results about "Nickel(II) acetate" patented technology

The invention discloses a cobalt titanate@nickel oxide graded core-shell photocatalytic material as well as a preparation method and application thereof. The cobalt titanate@nickel oxide graded core-shell photocatalytic material is formed by uniformly growing ultrathin nickel oxide nanosheets on a cobalt titanate sub-micron band. The preparation method comprises the following steps: firstly, obtaining cobalt titanate precursor fiber by utilizing electrostatic spinning technology, and calcining to obtain the cobalt titanate sub-micron band; and carrying out oil bath reaction on the obtained cobalt titanate sub-micron band in an aqueous solution containing nickel acetate, hexamethylenetetramine and sodium citrate, and calcining to obtain the cobalt titanate@nickel oxide graded core-shell photocatalytic material. The obtained cobalt titanate@nickel oxide graded core-shell photocatalytic material has a large specific surface area, and can provide more active sites for photocatalytic reaction. Meanwhile, the photocatalyst has the advantages of being large in photoresponse range, high in photo-induced electron-hole separation efficiency, high in photocatalysis capacity, good in cyclingstability and the like, tetracycline can be efficiently degraded, and the application prospect in the aspect of photocatalytic degradation of antibiotics is promising.

The invention discloses a reduced graphene oxide/nickel oxide composite wave absorbing material. Nickel oxide nanoparticles with the particle size of 1-100nm are uniformly distributed on a graphene nanosheet. The composite wave absorbing material has superior microwave absorbing performances: the lowest optimum reflection loss is -55.5dB, and the highest absorption frequency band below -10dB is 6.7GHz. The composite wave absorbing material has a light weight, and can meet the characteristics of light weight and high strength of wave absorbing materials. The invention discloses a preparation method of the composite wave absorbing material. The preparation method comprises the following steps: dissolving nickel acetate in a graphene oxide solution, freeze-drying, and carrying out high temperature pyrolysis on the obtained freeze-dried sample in argon atmosphere to prepare the wave absorbing material. The preparation method has the advantages of simplicity, environmental protection and low cost.

The invention discloses a preparation method of an N-doped Cu-modified nickel-based activated carbon catalyst and application of the N-doped Cu-modified nickel-based activated carbon catalyst in nitrocyclohexane hydrogenation reaction. The preparation method comprises the following steps: performing acid modification on activated carbon, taking the modified activated carbon as a carrier, performing N doping and nickel-copper loading at the same time, and applying the obtained N-doped Cu-modified nickel-based activated carbon catalyst to nitrocyclohexane hydrogenation reaction. Cu is used for modification, nickel acetate is used as a nickel source, the cost is low, pollution is small, equipment corrosion is avoided, non-noble metal nickel is used as an active component, melamine and urea are used as nitrogen sources, and activated carbon is used as a carrier, so that the cost can be obviously reduced. The obtained catalyst is used in nitrocyclohexane hydrogenation reaction, the conversion rate of nitrocyclohexane and the selectivity of cyclohexanone-oxime can be improved under relatively mild reaction conditions, and therefore the purpose that high-quality cyclohexanone-oxime is produced through the low-cost catalyst is achieved.

The invention discloses a low-temperature CO-SCR denitration Cu-Ni/AC catalyst which comprises a carrier and active components, the carrier is coconut shell activated carbon (AC), and the active components are copper and nickel oxides. The mass ratio of the copper element to the nickel element to the AC in the low-temperature CO-SCR denitration Cu-Ni/AC catalyst is (0.02-0.1): (0.01-0.05): 1. Theinvention also discloses a preparation method of the catalyst. The preparation method comprises the following steps of: respectively dissolving copper nitrate and a nickel acetate reagent with deionized water to obtain a mixed precursor solution, impregnating the coconut shell activated carbon in a formula ratio, and carrying out loading and drying to obtain a primary product; and roasting the dried primary product for 4 hours under the protection of nitrogen at 450 DEG C to obtain the low-temperature CO-SCR denitration Cu-Ni/AC catalyst. The low-temperature CO-SCR denitration Cu-Ni/AC catalyst disclosed by the invention has the characteristics of high denitration activity, good nitrogen selectivity and wide denitration temperature range. The Cu-Ni/AC catalyst provided by the invention hasthe advantages of simplified preparation process, low energy consumption, good dispersity of active components, environment-friendliness and no pollution.

The invention relates to a preparation method of nickel oxide/poly(3,4- ethylenedioxythiophene) compound electrochromic film. The preparation method comprises following steps: adding nickel acetate tetrahydrate and urea into absolute ethanol to prepare a reaction solution, putting FTO conductive glass, which has been washed by ultrasonic, into a hydrothermal reactor filled with the reaction solution, controlling the temperature in the range of 160 and 180 DEG C, maintaining the temperature for 6 to 12 hours, cooling to the room temperature, washing, burning so as to obtain FTO conductive glass with a NiO layer, dissolving 4- ethylenedioxythiophene monomers into a propylene carbonate solution of lithium perchlorate to obtain deposition liquid, then putting the FTO conductive glass with a NiO layer into the deposition liquid to play as a work electrode, taking a platinum slice as the counter electrode, then performing electro-deposition reactions so as the obtain the product. The preparation method has the advantages of simple technology and low cost, structure design in the micro-nano grade of the inorganic/organic compound electrochromic materials can be achieved, so the respective advantages of the organic and inorganic electrochromic materials can be fully utilized.

The invention provides a NiCo/C@CNT double-conductive network hierarchical structure material, and a preparation method and an application thereof. Nickel acetate tetrahydrate and cobalt acetate tetrahydrate which are used as metal sources and 2,5-dihydroxyterephthalic acid which is used as an organic ligand undergo a refluxing reaction at 80-110 DEG C for a period of time in ultrapure water usedas a reaction solvent to obtain orange-yellow precipitate, and the obtained product is centrifuged, washed and dried, and finally is calcined at 500-800 DEG C in an inert atmosphere for 1-4 h to obtain the NiCo/C@CNT double-conductive network wave-absorbing material. The hierarchical structure is formed after carbon nanotubes are generated in situ, so that the NiCo/C@CNT double-conductive networkhierarchical structure material has an excellent electromagnetic wave-absorbing performance as a wave-absorbing material.

The invention discloses a technology for producing nickel acetate through an ion exchange method. According to the ion exchange method for producing nickel acetate, ion exchange resin, ion exchange columns, glacial acetic acid, alkali and deionized water are involved. The method comprises the production steps of transition, adsorption and elution of ion exchange resin and the like. According to the implementation scheme, the technology route for producing nickel acetate is simple, cost is low, and continuous production can be achieved.

The invention discloses a preparation method of NiO hollow nanospheres, which comprises the following steps: by using biomass pectin as a soft template, carrying out self-crosslinking reaction with nickel acetate, and carrying out subsequent sintering to prepare the NiO hollow nanospheres with the particle size of about 40-60nm, which are assembled by nanoparticles. The material is stable in structure, excellent in H2S gas sensitivity and low in working temperature, the 50ppmsensitivity of the material is 175.9, and the H2S gas sensitivity is far superior to that of reported H2S gas sensors.

The invention discloses a phosphorus-doped heterogeneous nickel-cobalt sulfide composite material and a preparation method and application thereof. The preparation method comprises the following steps: placing foamed nickel in a methanol-water solution containing cobalt nitrate-surfactant, carrying out hydrothermal reaction, performing cooling, cleaning and drying after the reaction, and calcining the obtained foamed nickel for growing a cobalt precursor to obtain foamed nickel loaded with cobaltosic oxide; putting the foamed nickel into an ethanol solution containing nickel acetate and thioacetamide, carrying out a hydrothermal reaction, and performing cooling, cleaning and drying after the reaction to obtain a heterogeneous nickel-cobalt sulfide nano composite material; and then, putting the nickel-cobalt sulfide composite material at the downstream of an air flow, putting sodium hypophosphite at the upstream of the air flow, performing calcining in nitrogen, and naturally performing cooling to obtain the phosphorus-doped heterogeneous nickel-cobalt sulfide composite material. The material has excellent conductivity and excellent electrochemical performance, and shows excellent cycling stability and relatively high energy density when being applied to a supercapacitor as an active material.

The invention discloses a preparation method for a bamboo-like graphene tube/sulfur composite material. The method comprises the following steps of: firstly, evaporating a mixed solution of dicyandiamide, cobalt acetate tetrahydrate, nickel acetate tetrahydrate and ferric nitrate to dryness, carrying out high-temperature roasting reduction at 1000-1200 DEG C under the protection of nitrogen, adding dilute sulfuric acid for corrosion to obtain a bamboo-like graphene tube, mixing the bamboo-like graphene tube with sulfur, and carrying out hot melting sulfur volatilization reaction to obtain thebamboo-like graphene tube/sulfur composite material. The bamboo-like graphene tube is prepared by adopting a high-temperature roasting method; the preparation method is simple and convenient to operate and low in raw material cost, stacking of graphene sheet layers is avoided, the effect of physically constraining polysulfide can be achieved, the surface of the prepared graphene tube contains theiron-cobalt-nickel nanoparticles, the lithiation process of the lithium-sulfur battery can be catalyzed, and the prepared battery has the advantages of being high in capacity, good in rate capabilityand long in cycle life.

The invention discloses a preparation method of an electrochromic nickel oxide film, and belongs to the technical field of electrochromic devices and application. The method comprises the following steps: by taking nickel acetate tetrahydrate, tetrabutyl titanate, monoethanolamine, PVP powder and ethylene glycol monomethyl ether as raw materials, preparing a titanium-doped nickel oxide film precursor solution through a sol-gel method; and then spin-coating the titanium-doped nickel oxide film precursor solution on the surface of a substrate, and then carrying out annealing treatment to obtain the titanium-doped nickel oxide electrochromic film. The method is simple and easy to implement, obvious in effect and universal, and has wide application prospects in the field of nickel oxide-based ionic electrochromism.

The invention belongs to the field of electrode material preparation, and particularly relates to a preparation method of a high-performance cabbage-shaped heterostructure electrode material. The method comprises the following steps of pretreating foamed nickel, dissolving 2-3 mmol of nickel acetate, 4-5 mmol of cobalt acetate, 2-3 mmol of sodium molybdate, 30-40 mmol of ammonium fluoride and 2-5 g of urea into 60-100 ml of water, stirring, reacting, cooling, cleaning and drying to obtain a prepared sample, dissolving 8-9 mmol of sodium sulfide in 60-70 ml of deionized water, magnetically stirring for 45 minutes, transferring the prepared sample into the solution, transferring into a reaction kettle, keeping the temperature at 80-90 DEG C for 12 hours, naturally cooling to room temperature, cleaning for three times by using absolute ethyl alcohol and deionized water, keeping the temperature of the prepared sample at 60 DEG C for 6 hours, and drying to obtain a finished product. The problems that the material morphology is not uniform, the synthesis method cannot be accurately controlled, the conductivity is poor, and the adhesion with a current collector is poor are solved.

The invention relates to a lithium-ion battery NiCrxOy negative electrode material, which comprises NiCrO3 and NiCr2O4, has a spinel structure, is a particle material, and has an average particle size of 100-200 nm. According to the present invention, nickel acetate or nickel nitrate is adopted as a nickel source, chromium nitrate nonahydrate is adopted as a chromium source, a hydrothermal method is used under the condition of a hexamethylenetetramine solvent to prepare a mixed material, the mixed material is dried, and the dried mixed material is subjected to high temperature sintering to obtain the lithium-ion battery NiCrO3 and NiCr2O4 negative electrode material; the preparation method has beneficial effects of simple synthesis process, easy operation, and low material preparation cost; the obtained sample has characteristics of high purity and good crystallinity; the prepared sample is granular, and has a particle size of about 100-200 nm; and the prepared material has characteristics of high capacity and good cycle property.

The invention discloses a preparation method of a sodium ion transition metal oxide positive electrode material, which comprises the following steps: S1, mixing: taking out stoichiometric sodium acetate trihydrate, manganese acetate tetrahydrate, nickel acetate tetrahydrate, cobalt acetate tetrahydrate, magnesium acetate, zinc acetate dihydrate and citric acid, and conducting uniform dissolving inquantitative water, then fully conducting stirring and dissolving, transferring the solution into a water bath kettle, and continuously conducting stirring to a gel state. According to a prepared sodium ion positive plate, the Zn element is doped in the sodium ion positive plate, so that the Jahn-Teller effect of Mn<3+> ions can be effectively weakened, and the structural stability of the positive electrode material in the circulation process is better improved, so that the cycle life of the prepared material and improving the rate capability of the prepared material is effectively prolonged,the Zn doping amount can be further increased, the cycling stability of the material can be continuously improved, the material has excellent cycling performance and rate capability in use, the positive electrode material can effectively promote the practical application of the sodium ion battery, and the practicability is relatively high.

The invention discloses a ternary composite electrode material for a hybrid capacitor and application of the material. The ternary composite electrode material is NixVyMnZO2, and a preparation methodof the material comprises the following steps: preparing a nickel acetate-manganese acetate mixed solution and a sodium carbonate-ammonia water mixed solution, dropwise adding the sodium carbonate-ammonia water mixed solution into the nickel acetate-manganese acetate mixed solution, uniformly conducting stirring, conducting standing, discarding the supernatant, conducting centrifugal treating, retaining precipitates, conducting drying and grinding, adding ammonium metavanadate and distilled water, conducting ultrasonic treating at room temperature, conducting quick freeze-drying in liquid nitrogen, conducting grinding again, conducting sintering in a muffle furnace at high temperature, conducting cooling along with the furnace, and conducting grinding and sieving to obtain a product. The preparation method is simple and convenient in condition, easy to control and reasonable in process, vanadium, nickel and manganese oxides are fully dispersed into a system, and the storage of lithiumions is enhanced, so that the electrode performance is improved.

The invention relates to a method for preparing a regular mesoporous nickel based methanation catalyst. The method comprises the following steps: by taking titanium dioxide and aluminum oxide as a composite carrier, taking nickel oxide as an active ingredient, taking nickel acetate as a nickel source, taking dibutyl phthalate and aluminum isopropoxide as raw materials of the composite carrier, andtaking a block polyether F-127 and a polyoxyethylene-polyoxypropylene-polyoxyethylene triblock copolymer P123 as a composite template agent, preparing uniformly dispersed sol-gel by hydrolysis, aging, and sintering, thereby obtaining the nickel based methanation catalyst with a mesoporous structure. The product is powdered granules and is mixed with raw gas so as to realize rapid methanation, regular mesopores can increase the dispersity and improve heat stability of the catalyst, and the product can effectively resist condensation accumulation in a high-temperature environment produced in the rapid reaction process. The preparation method is easy to operate, simple and rapid in process, reasonable in material ratio, detailed and accurate in data and excellent in product stability and anti-caking property and is a very ideal preparation method of the regular mesoporous nickel based methanation catalyst.