162 results about "Nickel phosphate" patented technology

The invention belongs to the preparation of porous nano-catalyzed materials particularly applicable to metal-based direct-growing porous nanostructured material and an electrocatalytic application thereof. The material has a multistage channel structure, nickel phosphate nanoparticles are directly grown in a nickel net based skeleton, high mechanical stability is achieved, more active sites are exposed, and shortcomings existing in preparation tediousness, poor stability, lack of the active sites and the like are overcome. A synthetic method of low-temperature subphosphate phosphating is utilized in preparation of the nanomaterial after hydrothermal oxidative etching and growing of nickel hydroxide nanopararticles by hydrogen peroxide; the nanomaterial is applied to hydrogen production with electrocatalytic decomposition of water, preparation process of electrodes is greatly simplified, stability of the catalyst is obviously improved, good catalytic hydrogen production effect is achieved, and high application value is realized; the nanomaterial is simple in adopted equipment, moderate in preparation condition, easy and cheap in acquisition of raw materials and suitable for industrialized mass production.

The invention relates to a preparation method of a graphene-loaded nano nickel phosphate hydrogenation catalyst. According to the method, graphene oxide capable of being stably dispersed in water is used as a carrier precursor and loaded nano nickel phosphate is prepared by a static hydrothermal synthesis method. The graphene oxide can be uniformly and stably dispersed into a water solution due to a unique two-dimensional structure and abundant oxyl radicals of the graphene oxide; and furthermore, the graphene oxide has a strong adsorption capability on metal cations, and a nickel source can be highly dispersed. The catalyst provided by the invention is used for hydrogenation of olefin and has relatively high catalytic activity and good reusability. According to the catalyst, preparation conditions are moderate, the process is simple and the cost is low; and industrial production is easy to realize.

The invention discloses a preparation method of nano-flower-like cobalt-nickel phosphate growing on foam nickel. The method comprises the following steps: 1) placing each piece of foam nickel in an organic cleaning agent for ultrasonic cleaning to remove the greasy dirt on the surface of the foam nickel, and then placing the foam nickel in a dilute acid solution for treatment; 2) respectively dissolving hexahydrate cobalt chloride, hexahydrate nickel chloride, urea and ammonium fluoride in secondary deionized water, and stirring to dissolve to get a solution 1; 3) transferring the solution 1 into a reactor with one piece of a foam nickel polytetrafluoroethylene lining treated in the step 1) for hydrothermal reaction to obtain a nano-flower-like cobalt-nickel carbonate hydroxide hydrate precursor growing on the foam nickel; and 4) transferring the precursor obtained by the step 3) into a reactor with a lining filled with Disodium hydrogen phosphate dodecahydrate dissolved in 50mL of the secondary deionized water, using a hydrochloric acid solution to adjust PH to 8.5 for reaction to obtain the nano-flower-like cobalt-nickel phosphate growing on the foam nickel. The nano-flower-like cobalt-nickel phosphate has excellent catalytic oxygen release performance, and can be used for catalytic electrolysis of water electrode materials. Compared with a noble metal RuO2 catalyst, the catalyst has low cost and good stability.

The invention discloses anti-aging anti-corrosion paint used for a road lamp. The anti-aging anti-corrosion paint comprises the following materials: epoxy resin, polyurethane resin, polyethylene glycol, polytetrafluoroethylene, zirconium dioxide, titanium dioxide, titanium carbide, nickel phosphate, boric oxide, flame retardants and ethyl acetate. The anti-aging anti-corrosion paint takes advantages of various kinds of macromolecule resin with different molecular weights, the mechanical strength, the adhesive strength, the anti-corrosion performance, the high-temperature resistance, the weather resistance and the anti-aging performance of the paint are effectively improved after combination of various of resin, so the paint can stand long-term sun and rain exposure, has long service life, cannot crack or discolor, and can protect the road lamp against corrosion for a long time; meanwhile, the improved flame retardants are introduced, so the flame retardance of the paint film of the road lamp is improved, the safety performance of the paint is further improved, the road lamp can be effectively protected at high temperature or on other dangerous situations such as a fire, and the paint can prevent inside circuits of the road lamp from being influenced.

The invention discloses a preparation method for wearable nickel phosphate function gradient plating coat, which comprises: with design idea for gradient material, using single-bath electroplating method, preparing the coat with phosphate content gradient varying by boosting current density gradually and controlling deposition time. This product has proper phosphate content gradient and thermal expansion coefficient to release the thermal stress problem and high bond strength and abrasion resistance. This method can replace current used technique.

The invention relates to magnesium alloy surface treatment technology, in particular to a direct chemical nickel-phosphate plating solution and chemical nickel-phosphate plating coating process for magnesium alloy, belonging to the field of magnesium alloy surface treatment. A chemical nickel-phosphate plating coating takes nickel acetate or nickel sulfate as main salts, phosphinic acid as a reducing agent, sodium citrate, glycine or sodium succinate as a complexing agent, ammonium bifluoride as a corrosion inhibitor, sodium acetate as a buffering agent and cadmium chloride as a stabilizer, and the plating application temperature is 80-95 DEG C. The chemical nickel-phosphate plating coating process comprises the steps: organic solvent oil removal, blow-drying, alkaline washing, water washing, chemical nickel-phosphate plating, water washing and roasting in sequence. According to the process, the problems that the chemical nickel-phosphate alloy plating coating technology in the prior can not be directly applied to magnesium alloy and causes harm to the environment can be solved.

A catalyst Cu-VSB-5 for hydroxylating phenol in water to become O-phenol and p-phenol is composed of the millipore nickel phosphate material VSB-5 as carrier and Cu as active center. Its preparing process features that the Cu is led into the arteries of carrier by ion exchange.

Disclosed is a microwave synthesis method of nickel phosphates cobalt cellular materials. The steps comprise preparing nickel source substance, cobalt source substance, phosphorus source substance, template, mineralizer and water according to oxide molecular ratio, initially dissolving the nickel source and the cobalt source in the water, adding with the phosphorus source when stirring, then adding with the template and the mineralizer and continuing to stir evenly, moving the reaction solution into a microwave synthesis reactor, irradiating for 3-360 minutes step by step under the temperature of 130-180 DEG C, then centrifugal separating, washing and freeze-drying, and thereby the nickel phosphates cobalt CoVSB-1 materials is obtained. The frequency of the microwave is 2450 megahertz, and the power is 400-1000 watt. A microwave is heated by employing the temperature controlling mode. Compared with the conventional hydro-thermal method, the synthesis time of the invention is shorter, the grain size distribution is more uniform, and the reducing of the size of crystal grain is in favor of the increasing of the catalytic performance of the product.

The invention discloses a method for treating copper-nickel alloy electroplating wastewater in a pyrophosphate-citric acid system, and the method comprises the following steps: adding ferrous chlorideand calcium chloride into the wastewater, adjusting the pH value to 10-12 by lime emulsion, using ferrous ions and calcium ions for co-precipitating a citric acid complexing agent by, precipitating pyrophosphate by the calcium ions, precipitating to obtain copper phosphate and nickel phosphate by phosphate ions, and precipitating corresponding hydroxides and the like by copper ions and nickel ions, adding an oxidant to oxidize other organic matters, and adjusting the pH value of the wastewater to 6-9. The treatment results meet the requirements of GB 21900-2008 ''Discharge Standard of Electroplating Pollutants''. A new method for removing a carboxyl-containing organic acid complexing agent in the wastewater by use of the ferrous ions and the calcium ions for precipitation is established,and the new method has simple and easy process, low treatment cost and better market application prospect.

The invention discloses a method for treating pyrophosphate- citric acid zinc-nickel alloy electroplating wastewater, the method comprises the following steps of: adding ferrous chloride and calcium chloride into the wastewater, adjusting the pH value to 10-11.5 by using lime emulsion, co-precipitating a citric acid complexing agent by ferrous ions and calcium ions, precipitating pyrophosphate bythe calcium ions, generating corresponding hydroxides and other precipitates by nickel ions and zinc ions, and generating nickel phosphate and zinc phosphate precipitates by phosphate ions, adding anoxidant to oxidize other organic matters, and adjusting the ph of the wastewater to 6-9. The treatment results meet the requirements of GB 21900-2008 ''Discharge Standard of Electroplating Pollutants''. The new method for removing a carboxyl-containing organic acid complexing agent in the wastewater by precipitation of the ferrous ions and calcium ions is established, and the method has simple andeasy process, low treatment cost and better market application prospect.

The invention provides a secondary battery negative electrode. The secondary battery negative electrode comprises metal foil and a compact metal phosphate film arranged on the surface of the metal foil; the metal foil serves as a negative current collector and an negative electrode active material at the same time and is made of any one of aluminum, copper, iron, tin, zinc, nickel, manganese, lead, antimony, cadmium and bismuth, or an alloy containing at least one of the metal elements; and the metal phosphate film is made of one or more of aluminum phosphate, copper phosphate, iron phosphate,tin phosphate, zinc phosphate, nickel phosphate, manganese phosphate, lead phosphate, antimony phosphate, cadmium phosphate and bismuth phosphate. According to the secondary battery negative electrode, the metal phosphate film which is electrically insulated and is provided with lithium ions capable of migrating is arranged on the surface of the metal foil; the metal phosphate film achieves the similar function of a solid electrolyte membrane; and the compatibility of the negative electrode and electrolyte is improved, and the charging and discharging efficiency of a battery, the cycling performance of the battery, the high-and-low temperature performance and the safety performance are improved. The invention further provides a preparation method of the secondary battery negative electrode and a secondary battery.

The invention relates to a nickel metaphosphate micro-nanomaterial as well as a preparation method and an application thereof. The micro-nanomaterial has a nano sheet array structure, and the lamellar thickness of nano sheets is less than 20nm. The nickel metaphosphate micro-nanomaterial is prepared through the preparation method comprising the following steps: dissolving a soluble nickel salt and weak base molecules in a solvent to react together with carbon cloth to obtain a nickel-containing precursor/carbon cloth complex, and then performing heat treatment on the nickel-containing precursor/carbon cloth complex and a phosphate compound in an inert atmosphere to obtain the nickel metaphosphate micro-nanomaterial. Based on a structure duplication thought, the invention adopts a two-step method to achieve preparation of a micro-nanostructure and growth of a nickel metaphosphate crystal phase, respectively, the preparation of the nickel metaphosphate micro-nanomaterial with a single crystal phase is achieved, the experiment operation is simple and safe, and scale production and application can be achieved. The prepared nickel metaphosphate micro-nanomaterial has a significant pseudocapacitance characteristic, and the specific capacitance is greater than 2000F/g when the discharge current is 1A/g, so that the nickel metaphosphate micro-nanomaterial has a good potential application prospect in the aspect of electrochemical energy storage.

A high power high voltage lithium-ion cell, which includes an anode of lithium titanate (Li₄Ti₅0₁₂), a cathode of lithium nickel phosphate (LiNiPO₄), or of lithium manganese phosphate (LiMiPO₄), or of mixed phosphates of nickel, manganese and cobalt (LiNiMnCoPO₄), or their mixtures, and a non-aqueous liquid electrolyte. Both the anode and the cathode materials are preferably of nano-sized particles.

The invention provides a halogen-free expanding flame-retarded polypropylene containing porous nickel phosphate and a preparing way for the polypropylene, which is characterized in that, the invention contains expanding fire retardant complexed by tetramethylolmethane: ammonium polyphosphate by mass 5.3 swung dash 8.2%:10.7 swung dash 16.3% or tetramethylolmethane: melamine ammonium polyphosphate by mass 5.3 swung dash 8.2%:10.7 swung dash 16.3%, also contains porous nickel phosphate. The total mass of each component is: polypropylene 75-80%, complexed expanding fire retardant 16-24.5%, porous nickel phosphate 0.5-4%, which is a porous structure in hole diameter 8-13. As containing porous nickel phosphate, the expanding fire retardant can greatly reduce the addition of the expanding fire retardant, and reduce the influence from the expanding fire retardant on the mechanical properties such as tensile and fracture strength, etc. of materials, improve obviously the fire resistance of polypropylene, solve the molten drop of polypropylene when it is burning; and the production and the use of the polypropylene are very convenient.

The invention relates to the field of the surface protection of clean vacuum systems and in particular relates to a preparation method of a protective coating of a dry scroll vacuum pump. A protective coating of the dry scroll vacuum pump is prepared by adopting chemical plating, fluorine coating and PVD (Physical Vapor Deposition); a protective coating of a rotor or a stator is prepared by adopting a chemical nickel-phosphate plating technology and a fluorine coating sealing technology; and a plurality of layers of compound protective films are prepared on a crankshaft and a crankpin through a PVD technology. When the method disclosed by the invention is applied to the dry scroll vacuum pump, the corrosion resistance and the abrasion resistance of the vacuum pump can be improved; and the protective coating in a vacuum acquisition system for high-corrosion gas plasma etching, biological pharmacy and scientific instruments can resist the corrosion of high-corrosion gases for a long time so that the service life of the dry scroll vacuum pump is prolonged.

The invention discloses a ferro-nickel phosphate/carbon nanotube composite material and a preparation method and application thereof. A structure unit of the ferro-nickel phosphate/carbon nanotube composite material takes porous three-dimensional carbon nanotubes as a net-shaped framework, and ferro-nickel phosphate nanoparticles are wound on the carbon nanotubes. The preparation method comprisesthe following steps: pretreatment of the carbon nanotubes, preparation of a ferro-nickel hydroxide/carbon nanotube precursor, and in-situ conversion reaction of the ferro-nickel phosphate/carbon nanotube composite material. By the prepared ferro-nickel phosphate/carbon nanotube composite material, the problem that in a traditional preparation technological process, ferro-nickel phosphate nanoparticle unit structures are severely agglomerated can be solved effectively, and a new method is provided for preparing an electrode material which has a completely exposed active site, and is high in catalytic activity, good in electrical conductivity, low in overpotential and high in stability.

The invention discloses a nitrogen-doped nickel metaphosphate nano-particle and a preparation method thereof, and belongs to the technical field of catalyst preparation. The nitrogen-doped nickel metaphosphate (N-Ni2P4O12) nano-particle has a multi-stage nano structure, and the surface of the nano-particle which is in 100 nm grid shaped interconnection is distributed with a plurality of 5-10 nm nano crystals, and doping amount of nitrogen is 4%-8%. An electrode of the loaded nitrogen-doped nickel metaphosphate nano-particle shows very good catalytic activity in oxygen evolution reaction, and the electrode of the loaded nitrogen-loaded Ni2O4O12 nano-particle can drive current density of 30 mA cm<2> by only needing 280 mV during oxygen evolution reaction according to an electrochemical polarization curve, and also has very good catalytic stability.

Method for preparing a NiO nanosheet structure possessing (111) crystallographic planes as a primary surface with hexagonal holes, comprising the following steps: a) preparing a methanol solution of a nickel salt selected from the group consisting of nickel nitrate, nickel sulphate, nickel chlorate, nickel acetate, and nickel phosphate or a mixture thereof; b) adding benzyl alcohol (BZ), optionally substituted with alkyl, nitro, halo or amino, or a mixture thereof and urea to the solution of (a) in a ratio of Ni to BZ or substituted BZ of at least 1; c) solvent removal and calcination in air of the mixture, plate-like NiO nanosheet precursors therefore, NiO nanosheet structures obtainable by that method as well as various novel uses thereof.

The invention relates to a nickel phosphate/Co-MOFs composite material, and preparation methods and application thereof and belongs to the technical field of an electrocatalyst material. According a method, nickel salt and phosphate are dissolved in water; N,N-dimethylformamide is added; after uniform mixing is carried out, hydrothermal reaction is carried out by a mixture in a reactor; after thehydrothermal reaction is finished, filtering is carried out, and a sediment is obtained; the sediment is washed and dried to prepare nano-nickel phosphate; the nano-nickel phosphate is dispersed in asolvent; cobalt salt is added; stirring is carried out for 1-5h; 2-methylimidazole solution is added; reaction liquid is obtained; the reaction liquid is stirred for 0.5-5h and then is placed still for 1-24h; and centrifugation is carried out, the sediment is obtained, and the nickel phosphate/Co-MOFs composite material is prepared. An electrode modified by the composite material is high in glucose sensing sensitivity and low in detection limit and can be used for detecting glucose in human serum. The composite material is simple in preparation technology. Additives such as a reducing agent and a structure-directing agent are avoided. An equipment requirement is not high. Cost is low. The composite material is applicable to industrial production.

An object of the present invention is to provide a lithium secondary battery that has a lithium nickel phosphate compound in the positive electrode, is free of collapse of the crystal structure even at high potentials and is resistant to cycle deterioration. The lithium secondary battery according to the present invention has a positive electrode active material. This positive electrode active material contains a lithium nickel phosphate compound that is represented by the general formula LiNi_(1-x)Mn_xPO₄ (wherein 0<x≦0.15) and that has an orthorhombic crystal structure belonging to space group Cmcm.

The invention discloses an antibacterial and flame-retardant polypropylene composite material. Raw materials for the antibacterial and flame-retardant polypropylene composite material include polypropylene, nitrile rubber, butadiene rubber, nylon, ethylene-octene copolymers, compatibilizers, silicon dioxide, nanometer titanium dioxide, attapulgite, calcium sulfate whiskers, ammonium polyphosphate,tri-ethoxyl isocyanuric acid ester, pentaerythritol, aluminum hydroxide, nickel phosphate, nano-carbon materials, basalt fibers, dodecyl betaine, polyhexamethylene guanidine salt and copper chlorophyll acid. The antibacterial and flame-retardant polypropylene composite material has the advantages of high strength, good tenacity and excellent antibacterial performance and flame retardance.

The invention relates to a method for preparing a copper tungstate/nickel phosphate photoanode film with visible light response, and belongs to the technical field of photoelectric catalysis. A composite electrode comprises a copper tungstate thin film electrode, and the surface of the copper tungstate thin film electrode is loaded with uniformly distributed nickel phosphate nanoparticles. The composite electrode can prolong the life of a copper tungstate photo-induced carrier and further improve the photocatalytic water decomposition performance, thereby effectively solving the problem of lowphotoelectrocatalytic efficiency of copper tungstate. The preparation method of the electrode mainly comprises the following steps: firstly, taking sodium tungstate and ammonium oxalate as raw materials to conduct hydrothermal synthesis of a tungsten trioxide film electrode; secondly, adding copper ions dropwise to the surface of the tungsten trioxide, and conducting high-temperature conversion to obtain a plate-shaped copper tungstate electrode; and finally, dropwise adding nickel phosphate nanoparticles onto the surface of the copper tungstate electrode and conducting drying, so as to prepare a copper tungstate photoanode modified by nickel phosphate. The preparation process is simple in operation, low in cost and obvious in modification effect, and is expected to realize large-scale commercial application.

The invention relates to flexible filamentous spherical porous amorphous nickel phosphate nanoparticles and a preparation method thereof, and particularly provides a method, which is simple, convenient and practical, low in cost, rapid and efficient, and template-free, for preparing the flexible filamentous spherical porous amorphous nickel phosphate nanoparticles; the product is obtained by taking nickel nitrate, sodium dihydrogen phosphate and sodium hydroxide, which are low in price and easy to obtain, as raw materials, taking a mixed solution of water and ethylene glycol as a solvent, andcarrying out a reaction at a certain temperature; the product is the spherical porous amorphous nickel phosphate nanoparticles which have an open skeleton structure and are formed by accumulation of filamentous particles. The flexible filamentous spherical porous amorphous nickel phosphate nanoparticles obtained by the method have the advantages of being high in yield, easy to collect, good in stability, large in specific surface area, high in catalytic activity, and the like, have good catalytic characteristic in catalytic degradation of methylene blue and a catalytic hydrogenation reaction of p-nitrophenol, and can be recycled for a plurality of times. Therefore, an important material basis is provided for practical applications such as catalysis, epoxidation, hydrogen addition reactions, absorption, pigment and ceramic production.