222 results about "Nickel chloride hexahydrate" 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 preparation method for a Ni-Co / carbon nanotube aerogel catalyst of a zinc-air battery, which is used for the field of the zinc-air battery. In the catalyst, the nanometer Ni-Co / carbon nanotube aerogel dual-functional catalyst is successfully prepared by taking sodium alginate, cobalt chloride hexahydrate, nickel chloride hexahydrate and carbon nanotubes as raw materials. The dual-functional catalyst is endowed with excellent oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) catalytic performance, the initial potential of OER is early, the current density of the dual-functional catalyst is large, the initial potential of ORR is early, the limiting current density is large, and the stability is high; and moreover, the charging and discharging voltage difference of the zinc-air battery before and after long circulation test is small, and the energy efficiency after long circulation is high. The preparation method has the advantages of simplicity, rapidness in operation, greenness and environment friendliness, the source of sodium alginate is rich, and the obtained dual-functional catalyst is excellent in performance and is the zinc-air battery catalyst having a very good prospect.

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 discloses a CoNiFe-LDH / multilayer graphene high-performance composite energy storage material and a preparation method thereof. the preparation method comprises the steps of: measuring DMF and distilled water with a volume ratio of 8:2, and mixing the DMF and the distilled water to serve as a mixed solvent; adding expanded graphite into the mixed solvent, carrying out ultrasonic processing on the solution for 2 to 4 hours to obtain a multi-layer graphene mixed solution; adding cobalt acetate tetrahydrate, ferrous chloride tetrahydrate, nickel chloride hexahydrate and anhydrous sodium acetate into the mixed solution, stirring the solution for 5 to 10 minutes, pouring the solution into a hydrothermal reaction kettle, maintaining the temperature of the solution at 120 DEG C for1 hour, and then cooling the solution to room temperature; taking out a reactant and centrifugally washing the reactant with alcohol and water for three times, and drying the reactant in a 60 DEG C oven for 24 hours to obtain a dry CoNiFe-LDH / multilayer graphene composite material. According to the CoNiFe-LDH / multilayer graphene high-performance composite energy storage material and the preparation method thereof, a method of complexing metal by means of organic molecules is adopted for preparing laminar multi-element metal hydroxide ont eh surface of multilayer graphene which does not containoxygen functional groups, and the process is simple and suitable for production.

The present invention discloses a method for controllable growth of uniform nano nickel chain array induced by magnetic field. NiCl2.6H2O, glycol and hydrazine hydrate are chosen as raw materials. The raw materials react in a stable magnetic field to get a black product. Through centrifugal separation and alcohol wash of the black product, a regularly arranged nickel nano linear array is obtained. Through controlling the reaction temperature of the system and magnetic-field intensity, the present invention may obtain a nickel nano linear array with controllable dimensions, high purity, high length-diameter ratio and high orientation. The preparation method of the present invention is characterized by simple process, easy operation, moderate reaction conditions, energy conservation and environmental friendliness.

The invention relates to a preparation method of a Prussian blue flower-like nano-structure electrode material. The preparation method comprises the following steps: 1) firstly, dissolving nickel chloride hexahydrate and anhydrous sodium citrate into de-ionized water; 2) dissolving sodium ferrocyanide decahydrate into de-ionized water; 3) pouring a solution of step 2) into a mixed solution obtained by step 1) and uniformly stirring to obtain a mixed solution; 4) standing the mixed solution obtained by step 3); 5) centrifuging and collecting sediment; washing the sediment for several times; drying in vacuum to obtain Prussian blue precursor powder; 6) adding the precursor powder into a sodium hydroxide solution and carrying out ultrasonic treatment; 7) centrifuging and collecting a product and washing; drying in vacuum to obtain light green powder, namely the Prussian blue flower-like nano-structure electrode material. The preparation method provided by the invention has the beneficial effects that the specific surface area is remarkably enlarged so that reaction sites of electrolyte and the electrode material are effectively increased and an ion diffusion distance is reduced; when the Prussian blue flower-like nano-structure electrode material is used as a positive electrode active material of a sodium ion battery, the material has the characteristics of high power and good cycling stability.

The invention discloses a simple preparation method of a high-dispersion nickel oxide cluster modified carbon nitride photocatalyst for decomposing water to produce hydrogen. The simple preparation method comprises the following steps: adjusting the pH (Potential of Hydrogen) value of a mixture of g-C3N4, nickel chloride hexahydrate and de-ionized water with ammonia water by adopting a simple impregnation-precipitation method; stirring and standing at room temperature; evaporating to remove all the water at 100 DEG C to 150 DEG C; calcining to obtain the high-dispersion nickel oxide cluster modified two-dimensional carbon nitride photocatalyst. The preparation process of the photocatalyst is simple; the prepared photocatalyst has a large specific surface area and NiO is loaded on the surface of the two-dimensional g-C3N4 in a high-dispersion nickel oxide cluster form, so that the quantity of reaction active sites of the photocatalyst is increased and the visible light response degree is improved. Compared with a granular NiO / g-C3N4 photocatalyst, the photocatalyst disclosed by the invention has a more excellent photocatalytic property in a process of catalyzing the decomposition of the water to produce the hydrogen; under the condition that NiO loading amounts are the same, the yield of the hydrogen is improved by 7 to 8 times.

The invention relates to a porous nickel-copper oxide nanowire array enzyme-free glucose sensor electrode on a titanium substrate. The electrode is of a porous nanowire array structure formed by alternately assembling nickel-copper oxide nanoparticles on the titanium substrate, wherein single nanowire has the top-end diameter of 20+ / -1 nm and the length of 2+ / -0.2 mu m; the nanowires are vertically, uniformly and compactly distributed on the surface of titanium metal so as to form an array; the single nanowire is formed by alternately assembling copper oxide and nickel oxide nanoparticles with particle size of 5+ / -0.2 nm; and nanopores with size of 5+ / -0.2 nm are uniformly distributed in the nanowires. The preparation method comprises the steps of: placing a clean titanium metal sheet in an aqueous solution of copper chloride dihydrate, nickel chloride hexahydrate and urea, sealing and heating in an autoclave with polytetrafluoroethylene inner lining to 120 DEG C and maintaining for 24 hours; naturally cooling, and taking out the titanium metal sheet to obtain a precursor (Ni,Cu)2(OH)2CO3 nanowire array film of an electrode sample; and respectively annealing the precursor sample in air at 350 DEG C and 500 DEG C to obtain the sensor electrode. The obtained electrode can be applied to biological, medical, electronic instruments and other products.

The invention belongs to the synthesis technical field of organic medicine, and discloses a synthesis method of anti-influenza and avian influenza virus resistant medicine peramivir, which is characterized by adopting (1R, 4S)-2-azabicyclo[2.2.1]hept-5-en-3-one as a raw material and by comprising the following steps: step I: catalyzing, loop-opening and amino protection; step II: 1,3-dipolarcycloaddition; step II: sodium borohydride and nickel chloride hexahydrate reduction and acetylization; and step IV: amino protection removal, and chloroformamidine hydrochloride is adopted as reaction agent to generate guanidyl and hydrolysis methyl ester to prepare peramivir. The sodium borhydride and the nickelous chloride reduction system is used for substituting the expensive platinum dioxide to be used as reducing agent during the hydrogenation reduction process, and the self-produced chloroformamidine hydrochloride is used during the process for feeding the guanidyl reagent, so the cost is reduced, and the operation procedures are simplified. The synthesis method has short reaction routine and moderate reaction condition, is simple and convenient to operate, has low cost, and is suitable for the industrialized production.

The invention relates to the technical field of the application of new energy sources and new materials, and discloses a preparation method of a graphene-loaded Ni0.85Se composite material and the application of the composite material as an anode material for a lithium ion battery. The preparation method comprises the following steps: adding nickel chloride hexahydrate and selenium powder in water, adding hydrazine hydrate, stirring, and then adding an oxidized graphene solution, wherein the proportion of the above components is as follows: each 50-100mL water is corresponding to 150-550mg of nickel chloride hexahydrate, 50-200mg of selenium powder, 200-800mg of oxidized graphene solution, and 6-12mL of hydrazine hydrate; and then sufficiently stirring for 5-20min, transferring to a high-pressure reaction kettle, reacting for 12-48 hours at 120-180 DEG C to obtain the graphene-loaded Ni0.85Se composite material. The preparation method is simple, low in reaction temperature, low in cost, green and controllable and suitable for industrial production.

The invention discloses a preparation method of a supercapacitor electrode material with good electrochemical performance, which takes a carbon cloth as a flexible substrate and grows a transition metal double hydroxide on the substrate. The invention particularly relates to a novel method for preparing a carbon-based nickel-cobalt double hydroxide supercapacitor electrode material by carbonizingcotton cloth at high temperature and growing nickel-cobalt double hydroxide on the carbonized cotton cloth by a one-step hydrothermal method, wherein the carbon-based nickel-cobalt double hydroxide supercapacitor electrode material is prepared by a hydrothermal method. The invention comprises the following specific steps: At first, that cotton cloth is carbonize at high temperature to obtain carbon cloth, weighing a proportion of nickel chloride hexahydrate and cobalt chloride hexahydrate, and mixed with hexamethylenetetramine, Dissolved in appropriate amount of deionized water, carbon cloth or active treated carbon cloth is completely immersed in the mixed solution, stirred for a certain time, then Ni-Co double hydroxide is grown on the carbon cloth under hydrothermal conditions, and thecarbon cloth after reaction is washed and dried to obtain Ni-Co double hydroxide supercapacitor electrode material with carbon cloth as a flexible substrate.

The invention belongs to the technical field of electrochemistry and relates to a preparation method of a coating type ferrous sulfide / carbon composite, in particular to a preparation method of a coating type nickel-doped ferrous sulfide / carbon composite electrode. The preparation method comprises the steps that firstly, a tannic acid aqueous solution and a ferric nitrate aqueous solution are respectively prepared, and the ferric nitrate aqueous solution is dropwise added to the tannic acid aqueous solution under the condition of stirring at the normal temperature, so that a colloidal solution is formed; secondly, hydrazine hydrate is added to a nickel chloride hexahydrate aqueous solution, and the obtained mixed solution is dropwise added to the colloidal solution and evenly mixed with the colloidal solution; a substrate material is soaked in the mixed system to obtain a precursor, after being taken out, the precursor together with sulfur powder is calcinated in the inert gas shielding atmosphere for 0.5-2 h, and the coating type nickel-doped ferrous sulfide / carbon composite electrode is obtained after cooling. By the adoption of the preparation method of the coating type nickel-doped ferrous sulfide / carbon composite electrode, operation is simple and easy to conduct, multiple kinds of substrates can be coated, the reaction time is short, and industrialization is easy; the prepared composite electrode has good electrochemical performance and stability, raw materials are at a low price, easy to obtain and free of toxicity, the prepared composite electrode can be directly used as the electrode for an electro-catalytic water decomposition oxygen evolution reaction; and when the current density is 10 mA.cm<-2>, the overpotential reaches 320 mV, and the Tafel slope is 43 mV.dec<-1>.

The invention relates to a hydrothermal preparation method for spinel type ferrite nanopowder. According to the hydrothermal preparation method, zinc nitrate hexahydrate [Zn(NO3)3 6H2O], cobalt nitrate hexahydrate [Co(NO3)2 6H2O], nickel chloride hexahydrate [NiCl2 6H2O] and iron nitrate nonahydrate [Fe(NO3)3 9H2O)] are selected as raw materials and ammonia water [NH3 H2O] and ethanolamine [C2H7NO] are selected as mineralizing agents. According to the hydrothermal preparation method, the ammonia water and the ethanolamine are used as the mineralizing agents and particles of the prepared material are spherical, uniform in size about a few tens of nanometers and favorable in dispersibility. The hydrothermal preparation method is simple in operation and low in cost and has important significance for spinel type ferrite as an important industrial magnetic material and catalyst with excellent performances, which is widely applied to electronics, communication and chemical industries.

The invention belongs to the technical field of catalysts, and particularly relates to a preparation method of a NiFe2O4 / Cu2O magnetic composite nanometer catalyst. According to the preparation method, nickel chloride hexahydrate, ferric trichloride hexahydrate, copper acetate hexahydrate, glucose, sodium hydroxide and deionized water are used as raw materials. The preparation method comprises the following steps: firstly preparing a mixed solution by using the nickel chloride hexahydrate and the ferric trichloride hexahydrate, then heating, separating, washing and drying the mixed solution to obtain a magnetic NiFe2O4 nanometer catalyst; secondly, dissolving copper acetate dihydrate in ethylene glycol monomethylether and stirring, adding NiFe2O4 solid powder to the mixed solution, stirring, adding the glucose, separating, washing and drying to obtain a NiFe2O4 / Cu2O magnetic composite nanometer catalyst. The NiFe2O4 / Cu2O magnetic composite nanometer catalyst can remove organic dyestuff in water through adsorption and photocatalysis efficiently and quickly, can be recycled through magnets and meanwhile has the characteristics of simple preparation and repeated use.

The invention relates to a culture medium for detecting difficult cultivation type lactic acid bacteria in food and a detection method thereof. The formula in every 1000 parts of the culture medium includes: by weight, 10-40 parts of carbohydrate, 5-15 parts of peptone, 2-6 parts of yeast extract powder, 5-15 parts of beef extract powder, 1-3 parts of dipotassium hydrogen phosphate, 1-3 parts of triammonium citrate, 2.5-7.5 parts of sodium acetate, 0.1-0.3 part of magnesium sulfate, 0.02-0.06 part of manganese sulfate, 0.5-1.5 parts of tween-80, 0.5-1.5 parts of soluble starch, 0.2-2 parts of acid production metabolism promoting factor (ferrous sulfate heptahydrate and / or nickel chloride hexahydrate), 100-500 parts of unpolluted sample filtrate, and the balance distilled water. The pH adjusts to 4-5.5. The culture medium can simulate a real growing environment of the microorganism, and the solid difficult cultivation type lactic acid bacteria can be cultured rapidly because of the addition of the metabolism promoting factor. Whether the putrefying lactic acid bacteria exists can be determined simply and rapidly by using the culture medium to perform cultivation and fermentation, so that the rapid detection of the difficult cultivation type lactic acid bacteria on food can be realized.

The invention relates to a chemical plating method for a quartz fiber surface. The plating solution consists of 24g / L of nickel chloride hexahydrate, 10g / L of sodium hypophosphite, 10g / L of potassium borohydride, 24mL / L of ethylenediamine and 0.6mg / L of cadmium sulfate. Chemical plating is performed when the pH of the plating solution is equal to 13 to 14 and the temperature is 90 DEG C. Nickel-phosphorus-boron alloy is chemically plated on the quartz fiber surface to improve the hardness and the electric conductivity of the fiber.

The invention provides a NiS@C nanocomposite material for a negative electrode of a battery and a preparation method of the NiS@C nanocomposite material. The preparation method comprises the following steps: with nickel chloride hexahydrate and thiourea as reactive raw materials, producing NiS by a solvothermal method, then coating the surface of the NiS with carbon by a hydrothermal method, and annealing at high temperature to obtain the NiS@C nanocomposite material. The surface of metal sulfide is coated with the carbon, so that the defects that the sulfide has poor cyclicity and stability can be effectively made up, the cyclicity and the stability of the material are improved, and the conductivity of the material can be improved. As a negative electrode material of a lithium-ion battery, the NiS@C nanocomposite material prepared with the preparation method provided by the invention has relatively good lithium battery performance, relatively high specific capacity and relatively good cycling performance.

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 an Ni-Co-Al2O3 gradient composite coating. The method includes: employing deionized water to prepare nickel sulfate hexahydrate, cobalt sulfate hepathydrate, nickel chloride hexahydrate and boric acid into a plating solution, adding nano-aluminum oxide particles as a strengthening phase and cationic-type hexadecyl trimethyl ammonium bromide as a dispersing agent, using high-frequency impulse power with impulse frequency of 10kHz-200kHz, and changing the duty ratio according to the required coating thickness to conduct electrodeposition. The method controls the content of Co in the coating by adopting the 10kHz-200kHz high-frequency impulse power and changing the duty ratio of the power, so that the cobalt content of the coating is in gradient distribution, i.e. the Co content increases gradually from the coating surface to the interface of the coating and the substrate. And the content of Ni gradually decreases, so that the Co-Ni coating not only has high hardness but also ensures good corrosion resistance. The method provided by the invention is simple and safe to operate, and is economical and environment friendly.

The invention, which relates to the scientific field of nano composite materials, aims at providing a preparation method of a nickel-cobalt-phosphorus-carbon-nickel hydroxide ternary composite electrode material. The method comprises the following steps: growing a nickel-cobalt sheet wire nano-array substrate on the surface of foamed nickel by using nickel nitrate hexahydrate, cobalt nitrate hexahydrate, ammonium fluoride and urea, carrying out immersion in a glucose solution and heat treatment in an argon atmosphere, and then carrying out reaction with sodium hypophosphite to obtain a nickel-cobalt-phosphorus-carbon nano array; and then making a reaction with nickel chloride hexahydrate and urea; to be specific, enabling the nickel chloride hexahydrate reacts with the urea to obtain foamed nickel loaded with a nickel-cobalt-phosphorus-carbon-nickel hydroxide nano-array. The preparation method has advantages of simple process and strong operability; the nanor array can grows directly on the foamed nickel substrate; and the prepared electrode can be used as the electrode of a super capacitor directly, so that the super capacitor has the broad application prospects. Therefore, the cycle performance, overall specific capacitance and energy density of the electrode material can be improved; and the thus the electrode has the higher energy density and excellent cycle performance.

The invention discloses a method of preparing a beta-Ni(OH)2 flower-like microsphere. The method comprises the steps of dissolving nickel chloride hexahydrate in an organic solvent, then, transferring liquor to a solvothermal device for carrying out solvothermal reaction, centrifuging and drying to obtain basic nickel chloride powder; and dispersing the basic nickel chloride powder in alkali liquor with concentration of 0.1 M-10M to obtain the beta-Ni(OH)2 flower-like microsphere. The beta-Ni(OH)2 flower-like microsphere prepared by the method consists of beta-Ni(OH)2 nanosheets which consist of beta-Ni(OH)2 nanoparticles. The preparation method disclosed by the invention does not need a template, is simple in process, low in cost and easy to synthesize on large scale.

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.

The invention provides an electroplating method for nickel phosphorus alloy based on a betaine-urea-water deep eutectic solvent and belongs to the technical field of electroplating. The electroplating method comprises the following steps that betaine, urea and distilled water are subjected to isothermal stirring to obtain a transparent deep eutectic solvent; then nickel chloride hexahydrate and sodium hypophosphite are added into the deep eutectic solvent to be subjected to isothermal stirring to obtain a deep eutectic solvent with nickel phosphorus, and the deep eutectic solvent with nickel phosphorus serves as an electroplating solution; and a pure nickel plate serves as an anode, brass serves as a cathode, and the pure nickel plate and the brass are immersed into the electroplating solution to be subjected to electroplating at constant current. Tlectroplating technology for the nickel phosphorus alloy is safe, non-poisonous and environmentally friendly; environmental problems existing in watt nickel and borofluoride nickel plating and other technologies are soloved.

The invention discloses a metal coordination polymer and a preparation method and application of the metal coordination polymer. The polymer has a general structure formula shown by the formula I, and in the general structure formula of the formula I, R is a tetrabutyl ammonium ion, a tetradecyl trimethyl ammonium ion, Na or Ni, and M is Zn, Ni, Cu, Au, Pd or Pt. The preparation method comprises the following steps of: firstly, under an inert atmosphere, reacting sodium methylate with 1,3,4,6-tetra-sulfur co-cyclopentadiene-2,5-dione in an organic solvent; secondly, adding organic solution of nickel chloride hexahydrate to continue reacting, and after that, adding organic solution of an ammonium salt to continue reacting; and finally, drying the mixture, and oxidizing the mixture with iodine or air to obtain the product. For the polymer, the electric conductivity at 320K reaches 12.4S / cm, the seebeck coefficient can reach 170 muV / K, the heat conductivity is 0.3 W / m / k, and the thermoelectric merit figure ZT can reach 0.04. So, the metal coordination polymer is an excellent p-type organic thermoelectric conversion material.

The invention discloses a preparation method of an amorphous CoMoS4 / NiSe nanosheet array composite material, which comprises the following steps: (1) under hydrothermal conditions, cobalt nitrate hexahydrate reacts with sodium molybdate heptahydrate, and a CoMoO4 nanosheet array is grown on foam nickel; (2) sodium sulfide and the CoMoO4 nanosheet array react hydrothermally to form an amorphous CoMoS4 nanosheet array; and (3) under hydrothermal conditions, nickel chloride hexahydrate, selenium dioxide and urea react to form amorphous NiSe, and the amorphous NiSe is deposited on the surface of the amorphous CoMoS4 nanosheet array to obtain an amorphous CoMoS4 / NiSe nanosheet array composite material finally. The preparation method is simple and low in cost, and the prepared amorphous CoMoS4 / NiSe nanosheet array composite material has high specific capacitance and good cyclic stability, can be applied to super capacitor electrode materials and has a good application prospect.

The invention provides an improved preparation method for agomelatine. The method comprises the following steps of: carrying out reduction reaction with (7-methoxy-1-naphthyl) acetonitrile used as a starting raw material and methanol used as a reaction medium in the presence of nickel chloride hexahydrate and a reducing agent, and then carrying out acetylation reaction with acetic anhydride to generate agomelatine; and separating and purifying a reaction liquid after reaction, drying, decoloring and recrystallizing to obtain agomelatine. The preparation method provided by the invention employs a one-pot synthesis process, shortens synthesis steps, and reduces the difficulty in product purification caused by multiple secondary reaction; the reaction conditions are mild, and the cost and potential safety problem are reduced; a catalyst for the reaction is low; and the product acquired by the process has high yield and high purity, thus promoting the industrial production of agomelatine.

Disclosed is a preparation method for a high-capacity nanometer organic positive electrode material. The preparation method comprises the steps of 1, putting trimellitic anhydride, urea, nickel chloride hexahydrate and ammonium molybdate into a mortar to be mixed uniformly, putting the mixture into a drying oven to be dried, performing cooling and crushing and then adding a saturated solution of hydrochloric acid / sodium chloride, heating until reaching a slight boiling state, and then performing cooling, filtering and drying; 2, putting the synthesized and dried product into a sodium hydroxide solution to be heated, and then cooling the solution, mixing with deionized water, and adjusting pH by a hydrochloric acid solution, and after the product is fully precipitated, performing separation by filtering; 3, washing the product obtained in the step 2 by deionized water and methyl alcohol for many times, and then putting into a vacuum box to be subjected to evaporation to remove a little residual low-boiling-point impurity to finally obtain a carboxyl substituted phthalocyanine compound; and 4, mixing phthalocyanine active material and a conductive agent I2 based on a certain proportion and then putting into a ball grinding mill to be subjected to ball grinding, adding a mixed glue solution into the ball-grinded and sieved powder and performing ball grinding again; and coating an aluminum foil with a slurry solution to obtain the positive electrode material.

The invention provides a Ce-Ni-B / GO chemical composite deposition layer and an ultrasonic-assisted preparation method thereof. The ultrasonic-assisted preparation method is prepared by the following step of carrying out ultrasonic treatment on a low carbon steel workpiece in Ce-Ni-B / GO composite deposition liquid to prepare the Ce-Ni-B / GO chemical composite deposition layer on the surface of low carbon steel, wherein in the composite deposition liquid, the composite deposition liquid per L is prepared from the following components in parts by weight: 0.1-5g of cerium, 20-55g of nickel chloride hexahydrate, 0.5-4g of sodium borohydride, 20-65g of sodium hydroxide, 15-65g of ethylenediamine, 0.1-2g of sodium dodecyl sulfate and 0.1-10g of graphene oxide. According to the ultrasonic-assisted preparation method, the multifunctional nano composite deposition layer on the surface of the low carbon steel based on an ultrasonic wave and chemical plating technology by adopting the composite deposition liquid; and the prepared composite deposition layer is capable of effectively improving the performances including the corrosion resistance, the surface hardness and the wear resistance of the low carbon steel and effectively solving the problem that particles crack.

The invention provides a preparation method of nickel phosphide hollow nano microspheres. The preparation method comprises the following steps: dissolving nickel chloride hexahydrate, sodium hypophosphite and anhydrous sodium acetate in deionized water to obtain a precursor solution; adjusting the pH value of the precursor solution by using a potassium hydroxide solution to obtain a mixed solution; transferring the mixed solution into an oil bath to react; after the reaction is finished, filtering and washing the product, and freeze-drying the product; sintering the freeze-dried product under inert gas to obtain a mixture of elemental nickel and nickel phosphide; and immersing the mixture in hydrochloric acid to be treated to obtain pure-phase nickel phosphide, freeze-drying the pure-phase nickel phosphide to obtain uniform hollow nickel phosphide nano microspheres. A phase separation reaction is adopted, the crystallization degree of the nickel phosphide is controlled by changing the sintering temperature, so as to obtain the nickel phosphide nano microspheres with good crystallinity.