229results about How to "Give full play to the synergistic effect" patented technology

The invention discloses a novel UV-cured adhesive for plastic and a preparation method thereof. The UV-cured adhesive is prepared by the following steps of: adding polyurethane acrylate and a monomer diluent into an epoxy acrylate resin, stirring at the constant temperature of between 50 and 55 DEG C for 3 to 4 hours, and adding a photoinitiator, an accelerating agent and a polymerization inhibitor; and regulating the temperature to between 60 and 70 DEG C, stirring at the constant temperature for 1 to 2 hours and discharging to prepare the novel UV-cured adhesive. The UV-cured adhesive comprises the following components in percentage by weight: 30 to 60 percent of polyurethane acrylate, 10 to 30 percent of epoxy acrylate resin, 4 to 5 percent of photoinitiator, 25 to 65 percent of monomer diluent, 0.1 to 0.9 percent of accelerating agent and 0 to 0.2 percent of polymerization inhibitor. The product is mainly applied to adhesion of PVC, ABS, PC, PMMA and other plastics, and has the advantages of no solvent, simple and easy operation and suitability for mass production.

The invention discloses a silicon carbon composite material and a preparation method thereof. According to the preparation method, nano silicon powder particles are taken as a silicon substrate, a Si-C porous shell-core composite material is prepared, and the synergistic effect of silicon and carbon can be fully developed; the silicon material is high in electrochemical capacity, the carbon material is high in conductivity, and the flexible carbon material can be used for absorbing stress and buffering a volume effect of the silicon; meanwhile, the stable and firm shell-core structure can be used for maintaining the material stability; the porous structure can be used for increasing the contact structure of the silicon particles and an electrolyte and improving the compatibility of the silicon particles and the electrolyte; and the three-layer shell-core structure material is dispersed in a graphene material, the conductivity of the material can be further improved, and the capacity performance and the cycle life of an electrode material are improved.

The invention discloses an anode material which comprises a stack layer of graphene sheets and tin metal particles, wherein the tin metal particles are embedded into the graphene sheets or distributed among the graphene sheets. The invention also discloses a manufacturing method of the anode material, and the manufacturing method comprises the following steps of: directly reducing tin hydroxide on the graphene sheets by adopting a one-step total heating reduction method to obtain the tine metal particles; and baking to obtain a tin-graphene composite material. The invention also discloses a lithium ion battery, and the negative electrode of the lithium ion battery is manufactured by using the lithium ion battery anode material. The lithium ion battery anode material is high in specific capacity, the first-time discharge capacity can reach 600-900 mAh / g, and the capacity can reach 550-820 mAh / g when the discharge is stable; the cycle life of the lithium ion battery anode material is long, and the number of cycles can reach over 1,000; and the lithium ion battery anode material is simple in preparation process, and is suitable for industrial production.

The invention relates to a flotation agent for a copper mine and discloses a high-efficiency collecting agent for a high-sulfur copper mine. The collecting agent comprises the following materials in parts by weight: 30-40 parts of alkyl phosphorodithioic acid thioether ester, 25-35 parts of cyanoethyl diethyl dithionocarbamate, 10-20 parts of alkyl xanthic acid propionitrile ester and 10-15 parts of sulfur-nitrogen ester. The collecting agent for the high-sulfur copper mine has double functions of collecting and foaming, is good in selectivity and high in collecting ability, can realize high-efficiency separation of copper from sulfur in a low pH value (approximately 5) range, can effectively reduce the consumption of lime in the floatation process, can effectively increase the grade and recovery rate of concentrate, and has a wider application scope.

The invention discloses a carbon nanosphere / sulfur composite and a preparation method and application thereof. The carbon nanosphere / sulfur composite comprises a carbon nanosphere and elemental sulfur; the carbon nanosphere is composed of petal-shaped carbon plates which are combined into a sphere shape, gaps exist between the carbon plates, and the carbon plates are arranged in a wrinkled form and provided with through holes; the elemental sulfur and the carbon nanosphere are combined through a fusion permeation method to form the carbon nanosphere / sulfur composite, wherein sulfur accounts for 75-84 wt% of the composite. The gaps and through holes in the carbon nanosphere facilitate fusion loading of sulfur and dispersion and transportation of electrolyte ions, and the carbon nanosphere with a large specific surface area can load more sulfur active substances and effectively inhibit dissolution of polysulfide; the nitrogen element is doped on the carbon nanosphere to improve the electroactivity of a carbon material and enhance physisorption on sulfur; the carbon nanosphere / sulfur composite can serve as a positive electrode of a lithium-sulfur battery to improve the capacity, rate capability, cycling stability and coulombic efficiency of the lithium-sulfur battery.

The invention relates to a fully-degradable high-barrier composite material for flexible package, which is mainly prepared by blending the following components in parts by weight: 100 parts of a biodegradable matrix resin, 0-30 parts of an inorganic filler, and 0.1-15 parts of auxiliary agent; preferably, the composite material is formed by double-layer co-extrusion compounding of an inner layer biodegradable matrix resin and an outer layer biodegradable matrix resin; the inner layer biodegradable matrix resin is prepared from the following components in parts by weight: 10 to 90 parts of PBAT, 10 to 90 parts of PCL and 0.1 to 5 parts of an auxiliary agent, and the total weight part of PBAT and PCL is 100 parts; the outer layer biodegradable matrix resin is prepared from the following components in parts by weight: 10 to 90 parts of PBAT, 10 to 90 parts of PLA, 1 to 20 parts of an inorganic filler and 0.1 to 8 parts of an auxiliary agent, and the total weight part of PBAT and PLA is 100 parts, and the inorganic filler is nano calcium carbonate or talcum powder.

Special emulsified asphalt for railway or light-rail plated non-fragment rail and its manufacture are disclosed. The process is carried out by emulsifying by mineral, regulating by pH value, building up with other emulsifiers and blending for emulsifier and applier. Its advantages include excellent stability, compatibility, elasticity and endurance and higher ionic strength.

The invention relates to building material engineering, and aims at providing a preparing method of nano-modified high permeability resistant concrete. The preparing method comprises the steps of conducting dry stirring on cement, sand, gravel, fly ash, blast-furnace slag powder and silica fume, and mixing the mixture evenly; mixing a nanometer additive, a water reducing agent and water which accounts for half the weight evenly, and adding the nanometer additive, the water reducing agent and the water which accounts for half the weight into the mixture for stirring; then adding the water which accounts for the other half the weight and continuing to conducting mixing; conducting discharging, and putting the new mixture into molds; conducting maintenance according to a conventional maintenance mode after removing the molds to obtain the nano-modified high permeability resistant concrete. According to the preparing method of the nano-modified high permeability resistant concrete, the limitation of the influence of a single mineral component on the performance of the concrete is solved, through the combination of the multifunctional composition, the effect of function superposition and synergy is achieved, the composite multifunctional composition can effectively optimize the concrete structure grain composition, and by optimizing the internal pore structure of the concrete, the aim of improving the permeability resistance is achieved. The grain composition optimization is conducted on the concrete structure by utilizing the nanometer additive, the high activity and the microcrystal nuclear effect of nano-particles are given full play to at the same time, and the permeability resistance of the concrete structure is improved.

The invention discloses a flame-retardant coiled material and a preparation method thereof. The flame-retardant coiled material is a laminated structure which is formed by bonding a flame-retardant surface layer and a chopped fiber layer by a flame-retardant paint and carrying out curing. The flame-retardant paint is composed of a component A and a component B in a weight ratio of 10:(2-5). The component A comprises the following ingredients in percentage by mass: an epoxy resin, a flame-retardant resin, a flame-retardant diluter, a toughener, a dispersing agent, a defoaming agent, a leveling agent, a flame-retardant additive, a color paste and the balance of inorganic filler. The component B comprises a curing agent and the balance of curing accelerator. The flame-retardant additive comprises at least one of antimony trioxide, aluminum hydroxide, magnesium hydroxide, melamine cyanurate, chlorinated paraffin, tri(2-chloropropyl) phosphate and dimethyl methylphosphate. The epoxy resin, flame-retardant resin, flame-retardant diluter and flame-retardant additive are utilized to form the compound system, thereby fully displaying the synergistic effects of the components, and greatly enhancing the flame retardancy of the flame-retardant paint.

The invention discloses a preparation method of a nano molybdenum disulfide / nitrogen-doped carbon nanotube array hybrid composite electrode. A carbon fiber fabric coated with a conductive carbon black layer is used as a substrate; a nitrogen-doped carbon nano tube array carrier is controllably prepared on a carbon fiber substrate through a chemical vapor deposition technology; then nitrogen-doped carbon nano tubes are oxidized to realize surface functionalization; and then the nitrogen-doped carbon nano tubes are firmly combined with a nano molybdenum disulfide material in a chemical bond form to form an electrode material with an integrated three-dimensional parallel hole structure and a bidirectional catalysis function. According to the invention, the carrier provided by the invention has excellent conductivity and relatively high mass transfer and load transfer capabilities; the nano molybdenum disulfide material combined by chemical bonds has good bidirectional catalytic activity of oxygen electroreduction and oxygen anion electrooxidation; the diffusion resistance and ion transmission resistance of oxygen species are reduced; the electrochemical activity and the structural stability of an electronic conductor are improved; and the preparation method has wide application prospects in electrode materials such as metal-air batteries, proton exchange membrane hydrogen fuel cells and direct methanol fuel cells.

The invention relates to a preparation method of a lithium ion battery SnS2 / CNTs / PPy composite anode material. The preparation method comprises the following steps: Step One, adding SnCl4.5H2O and thioacetamide to a polyethylene glycol solution, and sufficiently and uniformly stirring; Step Two, adding a carbon nano tube to the solution, and carrying out ultrasonic dispersion for 60 min; Step Three, transferring the solution obtained in the step two into an automatic reaction kettle of polytetrafluoroethylene, and carrying out furnace cooling after insulation treatment; Step Four, carrying out centrifugal separation on the solution obtained in the step three, washing with deionized water and absolute ethyl alcohol, and carrying out vacuum drying; Step Five, dissolving an SnS2 / CNTs composite material obtained in the step four to the deionized water, uniformly stirring, adding lauryl sodium sulfate, adding pyrrole monomers and oxidizing agent, and stirring at room temperature for reaction for four hours; Step Six, carrying out centrifugal separation on the solution obtained in the step five, washing with deionized water and absolute ethyl alcohol, and carrying out vacuum drying. The anode material obtained by the preparation method is high in capacity and good in cycle performance, and has potential application prospects in the fields of portable electronic equipment, electric vehicles, aerospace and the like.

The present invention discloses an asphalt flame retardant modifier which is granular. According to the weight portion, the composition is: 20 portion to 45 portion of decabromodiphenyl ether or decabromophenylethane, 15 portion to 30 portion of hydrated magnesium silicate, 5 portion to 15 portion of smoke-suppressant, 1 portion to 10 portion of fatty acid of C16-C18 as coupling agent, and 15 portion to 25 portion of polyolefin. The present invention also discloses a preparation method of the asphalt flame retardant modifier. The asphalt flame retardant modifier of the present invention has good road performances and has the characteristics of good dispersion, easy addition, security, environmental protection and so on. The present invention improves the production efficiency, has no environmental pollution in working, and less equipment corrosion. The flame retardant composition is proper; the synergic effects of a plurality of flame retardants are made full use of; the materials are directly blended and added; the present invention simplifies the production process and reduces the production cost.

A nano-class composite nylon material is prepared through mixing one or more nylon monomers in fused state with one on more nano inorganic material, dewatering, and anionic polymerizing under existance of alkaline catalyst and cocatalyst. Its advantages are high strength, rigidity and size stability, and simple process.

The invention discloses a collecting agent for low-grade refractory gold ores. The collecting agent comprises the following materials by weight: 45-55 parts of cyanoethyl diethyl dithionocarbamate, 30-40 parts of allyl alkyl xanthate, and 10-15 parts of liquid ammonium dibutyl dithiophosphate. The collecting agent has dual attributes, such as collecting and bubbling, the selectivity is good, the collecting capacity is strong, and the concentrate grade and the recovery rate can be effectively improved in a pH value range of from 8 to 8.5, thereby being the high-efficiency collecting agent for low-grade refractory gold ores.

The invention discloses a copper-based powder metallurgy friction material for a dry clutch of a heavy-duty vehicle and a preparation method thereof. The matrix component of the friction material is copper and iron; the lubricating component is graphite particles, crystalline flake graphite, molybdenum disulfide and petroleum coke; the friction component is ferrochrome, zirconia and silicon dioxide; and the strengthening component is tin. The friction material comprises the following, by weight 50%-60% of copper powders, 1%-10% of iron powders, 5%-20% of graphite particle powders, 1%-5% of flake graphite, 1%-6% of molybdenum disulfide powders, 1%-15% of petroleum coke powders, 3%-9% of ferrochrome powders, 3%-9% of the zirconia, 1%-5% of the silicon dioxide, and 1%-4% of tin powders. The preparation method of the friction material comprises the following steps of mixing a mixture according to the composition of the powder metallurgical friction material; mixing the mixture in a V-shaped mixer evenly and pressing; and then sintering together with a copper-plated steel back to obtain the copper-based powder metallurgical friction material. The copper-based powder metallurgy frictionmaterial has high and stable friction coefficients and excellent wear resistance.

The invention discloses a gasoline engine lubricating coil composition and a preparation method thereof. The gasoline engine lubricating coil composition comprises the following components in percentby weight: (A) 0.1 to 6.0 percent of an ashless dispersing agent, (B) 0.1 to 8.0 percent of a clearing agent, (C) 0.01 to 1.5 percent of oil-soluble or dispersible oil stability boron-containing compound, (D) 0.003 to 0.5 percent of oil-soluble or dispersible oil stability molybdenum-containing compound, (E) 0.02 to 3.2 percent of zinc dialkyl dithiophosphate, (F) 0.01 to 3.0 percent of an antioxidant and (G) lubricating oil base oil with a main amount, wherein the boron molybdenum mass ratio of the component (C) to the component (D) ranges from 1:5 to 10:1. The blended gasoline engine oil composition contains all of the boron-containing compound, the molybdenum-containing compound and the zinc dialkyl dithiophosphate, completely exerts the synergistic effect between the additives, improves the anti-oxidation property, the anti-wear and friction-reducing properties and the extreme pressure property of the lubricating oil composition and reduces the ash content and the thionazin contentof the lubricating oil composition.

The invention relates to a preparing method of a high-branch type polyvinyl alcohol-acrylamide graft copolymer. The preparing method includes: dissolving polyvinyl alcohol with water, feeding nitrogen, cooling, adding a catalyst, reacting for 10-30 min, adding dropwise a monomer mixture solution with the adding time being controlled to be 30-90 min and the reaction temperature during addition being controlled to be 65-95 DEG C, reacting at 85-95 DEG C for 20-30 min after the addition is finished, adding the catalyst, reacting at 80-95 DEG C for 15-25 min, adding the catalyst, sampling in the reaction process and measuring viscosity, adding a terminating agent when the viscosity at 25 DEG C reaches 1500-15000 mPa*s to stop the reaction, and adjusting the solid content. The graft copolymer has characteristics of high molecular weight, more branches, low viscosity, less gel, good retention property, and high interference resistance to hetero-ion, and can achieve satisfied enhancing effects even when being used as a papermaking dry strength agent in a bad high-temperature high-conductivity environment for manufacturing paper with pulp.

Provided is a preparation method of a rare earth oxide and graphene nanocomposite material. The method comprises the following steps that 1, an aqueous solution containing needed amount of rare earth nitrate is prepared according to the loading capacity of rare earth oxide on graphene and the preparation quantity of a target product and added into a certain volume of graphene oxide dispersing agent of which the concentration ranges from 0.5 g / L to 5 g / L; 2, an appropriate amount of organic fuel is added into the dispersing agent in the first step, stirring and ultrasound are conducted, and a uniform dispersing agent is obtained; 3, the dispersing agent in the first step is heated and concentrated to be thick, the heated and concentrated dispersing agent is put into a heating furnace of 300 DEG C-900 DEG C for ignition, and after burning is conducted, cooling is conducted to room temperature. The preparation method of the rare earth oxide and graphene nanocomposite material is low in synthesis temperature, short in time, easy to carry out and low in cost, a reducing agent does not need to be additionally added, and graphene oxide is subjected to self reduction to obtain graphene; meanwhile, rare earth oxide is small in particle size and uniform in size, and the uniform dispersibility on graphene is achieved. The preparation method of the rare earth oxide and graphene nanocomposite material is rapid, efficient, high in yield, green, environmentally friendly and suitable for industrial production.

The invention discloses a Cherax quadricarinatus cultivation method, comprising the steps of crayfish pond selection, pond sterilization, water cultivation, fry adding, feed adding and crayfish pond management. By applying biological fertilizers in a water body to improve the quality of the water body, it is possible to fertilize the water quickly and also increase dissolved oxygen in the water body, providing a good water body environment for Cherax quadricarinatus; the feed for Cherax quadricarinatus is rich in nutrition and is good in palatability such that body weight of Cherax quadricarinatus increases quickly, and individual weight of adults of Cherax quadricarinatus is 1.5-2 times the body weight of common members of Cherax quadricarinatus; in addition, for traditional Chinese medicine additives in the feed, synergy of the traditional Chinese medicine components is given to full play by making use of the monarch, minister, assistant and guide compatibility theory in traditional Chinese medicine, antibacterial and anti-inflammatory, heat-clearing and toxin-removing and immunity-improving effects can be achieved, the adjustment for body balance and intestinal ecological environment of Cherax quadricarinatus can be significantly improved, survival rate of Cherax quadricarinatus is up to 91.5-93.6%, no medicine residue occurs, and health and safety are ensured.

Disclosed are melamine and its preparing method and application, with the characteristics that add 10-300 portions of inorganic flaming retardant, 100-1000portions of water into reactor with agitator and thermometer, make them to be dispersion in 50-130deg.C, the add into 0-300portions of antiflaming synergistic agent, 50-100 portions of melamine and 50-200 portions of cyanuric acid (emulsion or cream of ), which are stirred for 5 minutes to 2 hours in 50-150deg.C, in the course, can add into 100-1000 portions of water, generate the emulsion or cream of cyanuric acid covering inorganic flaming retardant which are filtered, are centrifugal separated, dried and scattered to be 0.01-500um cyanuric acid covering inorganic flaming retardant.

The invention belongs to the technical field of coatings and discloses a graphite phase carbon nitride / graphene oxide heterojunction-epoxy acrylate composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: ultrasonically mixing graphene oxide and graphite phase carbon nitride for 8-12 hours, centrifuging after the reaction is ended, and drying the solid product so as to obtain graphite phase carbon nitride / graphene oxide; adding a silane coupling agent and the graphite phase carbon nitride / graphene oxide into absolute ethyl alcohol, stirring to react at a normal temperature in a reflux state for 2-4 hours, centrifuging after the reaction is ended, and drying and screening the solid product so as to obtain modified graphite phase carbon nitride / graphene oxide; and finally, uniformly mixing the graphite phase carbon nitride / graphene oxide with epoxy acrylate, thereby obtaining the graphite phase carbon nitride / graphene oxide heterojunction-epoxy acrylate composite material. The composite material can be applied to ultraviolet-curable coatings, and the obtained coating has excellent hardness, thermal performance, mechanical performance and photocatalytic performance.

The invention discloses a nano-crystalline WC-Co-Ni catalyst, consisting of tungsten carbide, cobalt and nickel. The catalyst is prepared in the following procedures: the tungsten, the cobalt and the nickel soluble salt is mixed according to the mass ratio 100:1 to 20: 1 to 20 and is mixed in distilled water to produce mixed aqueous solution with a concentration of 5 to 30 percent; the mixed aqueous solution is introduced into a spray dryer for spray drying to yield oxide granule precursor; the oxide granule precursor is sintered, reduced and carbonized in the reaction furnace; after that the free carbon is removed in hydrogen atmosphere; and at last the product is cooled to room temperature under the protection of inert gas to yield nano-crystalline WC-Co-Ni catalyst. The process and the devices are simple, the cost is low and the nano-crystalline WC-Co-Ni catalyst yielded has high catalytic performance. Used as electrochemical hydrogen evolution and fuel cell, the electrocatalyst has wide practical prospects.

The invention relates to super absorbent resin with high antibacterial property and high salt tolerance. The super absorbent resin is prepared from the following raw materials in parts by weight: 100parts of acrylic acid, 35-45 parts of a basic compound, 0.06-1.8 parts of a primary crosslinking agent, 0.05-2 parts of an initiator, 0.3-4 parts of a compound crosslinking agent and 0.01-10 parts ofa tea saponin intercalation graphene antibacterial composition. A preparation method of the super absorbent resin comprises the following steps: in a mixed solution of acrylic / acrylate formed by diluting with deionized water and neutralizing an acrylic monomer solution with basic compound, adding the primary crosslinking agent, uniformly stirring, then adding 0-45% of tea saponin intercalation graphene antibacterial composition, carrying out ultrasonic dispersion for 30-240 minutes, then heating to the temperature of 35-70 DEG C, adding the initiator, carrying out polymerization to form colloidal super absorbent resin, sequentially carrying out pelletizing and drying, and carrying out surface treatment at the temperature of 110-180 DEG C by adopting a mixed crosslinking agent, so that thesuper absorbent resin is obtained.

The invention provides a degradable lightweight polyolefin composite for injection molding and a preparation method of the composite. The polyolefin composite is prepared from secondarily modified fiber mixed filler, polyolefin resin, a toughening agent, a compatilizer, a lubricant and the like through blending and extrusion granulation by a tri-screw extruders which are arranged triangularly and meshed in the same direction, wherein the modified fiber mixed filler is prepared as follows: a natural plant fiber material such as rice husks, chaff and the like are mixed with a nano-silica colloidal solution, a dispersant and a surfactant are added and a blending reaction, drying and other technologies processes are performed; then the modified mixed fiber filler is subjected to secondary surface coupling hydrophobic treatment and blended with polyolefin resin, the toughening agent, the compatilizer and the lubricant. The polyolefin composite has degradability specific to the natural plant fiber filler, has lower density than inorganic mineral filler and has excellent thermoplastic processing characteristics and mechanical properties in the injection molding process.

The invention discloses a cold-resistant flame retardant thermoplastic elastomer and a preparation method thereof, solving the problem that the existing thermoplastic elastomer has poor low temperature resistance. The cold-resistant flame retardant thermoplastic elastomer is characterized by being prepared from powdered cis-polybutadiene, polyvinyl chloride, chlorinated polyethylene, powdered acrylonitrile-butadiene rubber, zinc oxide, stearic acid, paraffin oil, sulphur, dicumyl peroxide, triallyl isocyanurate, an accelerator, an anti-aging agent, tribasic lead sulphate, dibasic lead sulphate, an antistatic agent, conductive carbon black, white carbon black, a cold-resistant plasticizer, a liquid fire retardant and a solid fire retardant. The cold-resistant flame retardant thermoplastic elastomer can be used at the temperature of -60 DE C for a long time while good mechanical properties and processability are guaranteed; in addition, the cold-resistant flame retardant thermoplastic elastomer has excellent flame retardant performance and also has the advantages of good elasticity, simple technique, low energy consumption, high production efficiency and recoverability and is a good material for manufacturing products such as a cold-resistant flame retardant conveying belt, a driving belt, a rubber tube, an electric cable, an automobile sealing product and a rail transit shock absorbing product.

The invention discloses a carbon fiber / NiCo2O4 / graphene composite material preparation method, and belongs to the technical field of nano-materials. The method adopts structural carbon fibers as a base, and performs in situ synthesis to obtain a multistage micro-nano structure that NiCo2O4 nano wires and porous graphene interlace and interpenetrate with each other on the surface of the carbon fiber through a hydrothermal method. The advantages of the method are that energy storage characteristics of the conductive carbon fiber, the NiCo2O4 nano wires and the porous graphene can be fully performed, and the multistage micro-nano structure can give full play to the synergistic effect among the three. The carbon fiber / NiCo2O4 / graphene composite material prepared through the method can be usedas a super capacitor electrode material. When the current density is 1 A / g, the specific capacity can be up to 1120.74. The material has great application potential in flexible energy storage electrode materials.

The invention discloses a method for improving electrochemical performance of a high nickel ternary cathode material through silicon dioxide / sodium collaborative modification. The method comprises thesteps of (1) respectively dissolving nickel, cobalt and manganese sources and urea in distilled water, transferring the solutions to a reactor after sufficient dissolution, then placing the reactor in an oven for reaction to obtain milky yellow powder of a high nickel ternary precursor; (2) sufficiently grinding the precursor, a lithium source and a sodium source to obtain a mixture, carrying outtwo-stage high temperature sintering on the mixture in an oxygen atmosphere in a tubular furnace, and cooling to the room temperature along with the furnace temperature to obtain Li<0.9>Na<0.1>Ni<0.8>Co<0.1>Mn<0.1>O2; and (3) mixing ethyl orthosilicate and water, then adding the mixture to Li<0.9>Na<0.1>Ni<0.8>Co<0.1>Mn<0.1>O2, stirring, drying, adding a small amount of absolute ethyl alcohol, grinding and then preserving the temperature for a period of time in a Muffle furnace to obtain an SiO2 / Li<0.9>Na<0.1>Ni<0.8>Co<0.1>Mn<0.1>O2 composite material. The method has the advantages of simpleprocess and low cost and prepares the silicon dioxide coated SiO2 / Li<0.9>Na<0.1>Ni<0.8>Co<0.1>Mn<0.1>O2 composite material with good electrochemical performance such as high rate performance and cycle performance.

The invention relates to a multi-walled carbon nanotube-based noble metal catalyst and a preparation method thereof. The chemical composition of the material is CNT / Y / MOFs, wherein Y refers to noble metal nanoparticles and is one of gold, silver, platinum and palladium; MOFs is Co-MOF-74. The invention also provides a preparation method of the multi-walled carbon nanotube-based noble metal catalyst, wherein the obtained multi-walled carbon nanotube-based noble metal catalytic composite material has high thermal stability; meanwhile, a porous channel in a metal organic framework shell in the catalyst can promote sufficient contact between a reactant and the noble metal nanoparticles, thereby improving the catalytic efficiency of catalytic reaction. The nano composite material has an excellent application prospect in the chemical reaction such as automobile exhaust treatment, methane reforming reaction, pollutant degradation and photocatalytic splitting water into hydrogen.

The present invention discloses sol-gel in-situ and self assembling process of synthesizing composite photocatalytic material, and belongs to the field of nano functional material. The process includes the following steps: dissolving metal chlorate in proper amount of solvent; adding mixed phthalic nitrile via stirring; adding proper amount of butyl titanate; adding proper amount of hydrochloric acid as hydrolysis inhibitor and pH regulator; stirring at room temperature to form dry gel; and drying and heat treatment to obtain the nano composite photocatalyst. During the preparation, the metal phthalocyianine compound and TiO2 are in-situ and self-assembling formed simultaneously, and the obtain organic matter and inorganic matter have clear interface, strong binding performance and high stability and are favorable to the transfer of photoelectron and absorbed energy in between. The compound photocatalyst has high photocatalytic degradation efficiency.