75results about How to "Simple process route" patented technology

The invention discloses ultrafine heterostructure martensitic steel based on Mo segregation induction and a heat treatment process of the ultrafine heterostructure martensitic steel. The martensitic steel comprises the following chemical components in percentage by weight: 0.4-0.7% of C, 0.3-1.0% of Mn, 1.0-2.0% of Si, 0.2-1.5% of Cr, 0.01-3.5% of Ni, 0.2-0.8% of Mo, less than or equal to 0.03% of P, less than or equal to 0.03% of S and the balance of Fe. The method comprises the following steps: firstly, obtaining a pearlite type structure rich in Mo cementite through a normalizing or tempering process by utilizing the characteristic that Mo element is easily enriched in the cementite; then austenitizing treatment is conducted through a rapid heating technology by means of the characteristics that in the austenitizing process, the dissolving speed of molybdenum-rich cementite is low, and the diffusion speed of the Mo element is low, and a superfine austenite structure with the Mo element distributed unevenly is obtained, that is, a nanometer / submicron Mo-rich area exists in superfine austenite; and then quenching and tempering treatment are carried out, a tempered martensite structure with a superfine heterostructure is obtained, so that excellent strength and plasticity are obtained, the yield strength of the alloy can reach 2000-2500MPa, the tensile strength can reach 2100-2700MPa, and the ductility is 6-12%.

The invention discloses a method for preparing high-quality iron phosphate in a short process, and belongs to the field of battery material manufacturing. The method comprises the following steps: dissolving iron powder with phosphoric acid to prepare a ferrous phosphate solution, then transferring the solution into a pressurized reaction kettle, blowing high-speed oxygen to oxidize ferrous phosphate into ferric phosphate, adding ammonia water to control the pH value to be 1.5-2.0, and carrying out solid-liquid separation to obtain the water-containing amorphous ferric phosphate, after washing is finished, a water-containing material is fed into a muffle furnace to be subjected to stepped calcination, dehydration and crystal transformation are completed, and the alpha monoclinic system iron phosphate is obtained. The method provided by the invention is short in process flow and low in energy consumption, the oxidant is easy to obtain and safe, the particle size uniformity of reaction materials is good, and the prepared iron phosphate is uniform in particle size, regular in structure and stable in iron-phosphorus ratio and is a high-quality precursor material.

The invention provides a vanadium dioxide composite electrode material and a preparation method and application thereof. The method comprises the following steps: taking vanadium leachate as a raw material, reacting with a reducing agent under the condition that the pH value is 2-6, mixing the obtained tetravalent vanadium solution with a precipitator, carrying out precipitation reaction, filtering, washing and drying the precipitate to obtain vanadium dioxide precursor particles, grafting a silane coupling agent with sulfydryl onto the surface of the vanadium dioxide precursor through coupling reaction, and carrying out vacuum drying to obtain the vanadium dioxide precursor. Silver ions are chelated under the action of sulfydryl, and silver elementary substances are deposited on the surfaces of vanadium dioxide precursor particles through reduction. And coating the composite slurry of the vanadium dioxide precursor and the carbon nanotube on the surface of a substrate, and calcining to obtain the vanadium dioxide composite electrode material. The vanadium dioxide composite electrode material is used as a negative electrode material of a battery, and the obtained battery is found to have excellent stability and reaction dynamic characteristics.

The invention relates to the technical field of ship engine manufacturing and machining, in particular to a machining method of a special-shaped locking gasket with a hole and a stamping die tool of the special-shaped locking gasket with the hole. Comprising a base, a blanking and punching die, discharging rubber, a discharging plate, an upper support, a die handle, a pushing rod, a base plate, a male die base, a blanking female die, a discharging device, a pushing block and a punching male die, a machine tool is started, an upper die of the punching die tool is lifted and separated from a lower die, then a long-strip-shaped plate blank is placed on the discharging plate, the upper die of the punching die tool is pressed downwards to a fixed distance, and the punching male die is pressed downwards. The special-shaped stop gasket with the hole is punched by pushing the push rod to eject the punched and formed special-shaped stop gasket with the hole down, one-time punching machining of the special-shaped stop gasket with the hole is completed, and continuous punching machining can be carried out by repeating the operation, so that the machining efficiency of the special-shaped stop gasket with the hole is improved. By the adoption of the structure, one-time stamping forming of the special-shaped locking gasket with the hole is achieved, the process route is simple, operation is easy and convenient, and the requirement for mass production can be met.

The invention discloses a chip wastewater whole-process treatment method and system based on anaerobic ammonia oxidation, the system comprises a water quality and water quantity equalizing tank, a physicochemical treatment unit, a biochemical treatment unit and a clean water tank which are connected in sequence, the biochemical treatment unit comprises a third adjusting tank, an autotrophic nitrogen removal unit and a deep nitrogen removal unit which are connected in sequence, according to the method, various kinds of wastewater are mixed and neutralized, compared with respective treatment of the wastewater, the use of acid-base neutralization agents is reduced, then physical impurity removal, fluorine removal and hydrogen peroxide removal are performed by using a physical and chemical unit, and then biochemical nitrogen removal is performed by using a biochemical unit. And meanwhile, an autotrophic nitrogen removal-anaerobic ammonia oxidation reaction is used for nitrogen removal, so that compared with ammonia stripping, AO, MBR and other processes, a large amount of energy consumption is saved, and greenhouse gas emission is reduced. The whole method has the advantages of simple process route, good treatment effect, low investment and operation cost and the like.

The invention belongs to the field of preparation processes of nano-porous materials, and relates to a method for preparing a silicon-based elastic aerogel phase-change thermal insulation material by an in-situ chemical method. A phase-change material with an oxygen-containing functional group on the surface is selected as a phase-change core material, a surfactant, deionized water, ethanol, a silicon precursor, acid, alkali and the phase-change core material are uniformly mixed and subjected to hydrolysis, polycondensation and other reactions, meanwhile, the phase-change core material and silicon-based aerogel are subjected to in-situ grafting combination in the process, and the silicon-based aerogel is prepared. The silicon-based elastic aerogel phase change thermal insulation material is prepared through sol-gel and supercritical drying. The invention innovatively provides an in-situ grafting method, and the constructed silicon-based elastic aerogel phase-change thermal insulation material integrates multiple functions of high thermal insulation property, elasticity, leakage prevention, high response rate and the like, has the advantages of low material cost and convenient preparation process, and is low in energy consumption and easy to realize large-scale production.

The invention discloses a method for recovering R60705 niobium-zirconium scrap-like waste. The method comprises the following steps: 1, collecting the R60705 niobium-zirconium scrap-like waste; 2, pretreatment; 3, pressing and welding to obtain a scrap consumable electrode; step 4, carrying out VAR primary smelting to obtain a scrap ingot; fifthly, a niobium-zirconium square strip is obtained through forging and subjected to surface treatment; 6, pressing a raw material electrode block; seventhly, the raw material electrode block and the niobium-zirconium square strip subjected to surface treatment are installed and welded to obtain the consumable electrode; and 8, VAR secondary smelting is carried out. According to the method, a large amount of R60705 niobium-zirconium scrap-shaped waste which is high in O and N element content, low in price and difficult to use is taken as a raw material, the O and N elements in the R60705 niobium-zirconium scrap-shaped waste are effectively diluted by adopting a process route of first melting, then forging and remelting, the R60705 cast ingot meeting the standard is obtained, the R60705 niobium-zirconium scrap-shaped waste is greatly utilized, the raw material cost is greatly reduced, the process route is simple and feasible, and the method is suitable for industrial production. And the method is suitable for popularization.

The invention relates to the field of recycling of rare and noble metal secondary resources. The invention particularly relates to a method for recovering platinum group metals and rare earth in a spent automobile three-way catalyst. The invention relates to a method for recovering platinum group metal and rare earth in a spent automobile three-way catalyst. The method comprises the following steps: A, crushing and fine grinding; b, uniformly mixing and briquetting; C, vacuum high-temperature smelting; d, fine crushing and magnetic separation; and E, acid leaching. The method has the advantages of simple process flow, high resource recovery rate, environmental protection and the like, and has wide industrial application prospects.

The invention discloses a method for preparing PETG (Polyethylene Terephthalate Glycol) biodegradable copolyester from waste PET (Polyethylene Terephthalate) polyester. The method comprises the following steps: mixing the waste PET polyester, an alcoholysis agent and a catalyst, heating to carry out alcoholysis reaction, controlling alcoholysis reaction conditions to depolymerize the PET polyester to obtain an oligomer with the number-average molecular weight of 1000-2000g / mol and the polymerization degree of 5-8, stopping the reaction, then supplementing monomers, and completing a condensation polymerization reaction under a high vacuum condition to obtain the PETG copolyester. According to the scheme, the process route is simple, the using amount of the catalyst is small, the catalyst does not need to be supplemented during condensation polymerization, energy consumption is low, conversion from non-degradable PET to biodegradable copolyester is achieved, and the method has important significance for relieving the plastic pollution problem.

The present invention discloses a method for preparing nano-scale silver-coated copper powder with low silver content in a limited area, comprising the following steps: firstly, surface pretreatment of copper powder is performed; then, the pretreated copper powder is mixed with Schiff base solution and amino acid complexing agent to obtain copper powder precursor solution; silver salt solution is slowly dripped into the copper powder precursor solution for reaction; after the reaction, a de-crosslinking agent is added to perform solid-liquid separation, and the obtained solid product is washed and dried to obtain nano-scale silver-coated copper powder with low silver content. The present invention adds Schiff base auxiliary agent, and the cross-linked network formed by the Schiff base auxiliary agent in water not only plays the role of dispersant and complexing agent, but also can limit copper balls in the grid to replace with silver ions. The one-step method is adopted to prepare silver-coated copper powder, and the process is simple. The prepared silver-coated copper powder has low silver content, uniform and dense silver shell coating, high conductivity and oxidation resistance.

The invention provides a preparation method of a copper-doped nickel hydroxide self-supporting electroreduction nitrate catalyst. The preparation method comprises the following steps: ultrasonically washing foamed nickel with ethanol, diluted hydrochloric acid and ultrapure water respectively; and then transferring the treated foamed nickel to a polytetrafluoroethylene lining containing a hydrogen peroxide aqueous solution and copper salt, assembling a reaction kettle, finally putting the reaction kettle into a drying oven for reaction, cooling to room temperature, taking out the self-supporting catalyst, cleaning with water, and drying to obtain the copper-doped nickel hydroxide material. The preparation method of the catalyst is an innovative construction method of an electro-catalysis nitrate reduction catalyst, a brand-new catalysis strategy is provided for normal-temperature and normal-pressure electro-catalysis water body nitrate reduction synthesis of ammonia, meanwhile, the preparation process route of the catalyst is simple and easy to implement, high electro-catalysis performance is achieved, and the method is suitable for industrial production. Certain potential application prospects are realized.

The application discloses a preparation method of three-dimensional hollow carbon spheres. The three-dimensional hollow carbon spheres are prepared by one-step pyrolysis method through the three-dimensional network structure of melamine foam and the compounding of MOFs materials. The method is simple in process, environment-friendly, low in cost and capable of industrial production. The three-dimensional hollow carbon spheres prepared by the method have uniform and good micro-morphology, the carbon spheres are hollow in the inside, each carbon sphere has four branches connected with other carbon spheres, and multiple carbon spheres are connected to form a three-dimensional network structure.

The invention provides a method for rectifying trifluoromethanesulfonyl fluoride, which can be used for effectively purifying trifluoromethanesulfonyl fluoride feed gas containing impurity gases such as HF, CO2, SO2 and the like, and comprises the following steps of: obtaining an azeotrope of trifluoromethanesulfonyl fluoride and HF by using a conventional rectifying process, condensing the azeotrope, settling, splitting phases, and rectifying and purifying again, thereby obtaining the trifluoromethanesulfonyl fluoride. The problem that trifluoromethanesulfonyl fluoride and HF cannot be thoroughly separated through azeotropic distillation is solved. The invention also provides a rectification device of the trifluoromethanesulfonyl fluoride, the rectification device comprises a collecting tower, a light component removal tower, a heavy component removal tower, a settling separation tank and a finished product rectification tower which are connected in sequence, continuous rectification preparation of the high-purity trifluoromethanesulfonyl fluoride is realized, and the purity of the high-purity trifluoromethanesulfonyl fluoride is not less than 99.5%.

The invention provides a candesartan cilexetil capsule and a preparation method thereof, and the candesartan cilexetil capsule is characterized in that each capsule contains candesartan cilexetil, lactose, corn starch, hydroxypropyl cellulose, carboxymethyl cellulose calcium, polyethylene glycol 8000 and magnesium stearate. According to the candesartan cilexetil capsule provided by the invention, the problem of stability of candesartan cilexetil is solved, the possibility of crystal transformation of common tablets in a tabletting process is reduced, and the characteristic dissolution curve of a final product is similar to that of a reference preparation; the preparation method is simple in process route, the fluidized bed one-step granulation method enables the loss to be less, the product yield is higher, and the industrial mass production cost is reduced.

The invention belongs to the field of medicinal chemistry, and particularly relates to a colopivir synthesis process which is simple in process route, cheap and safe in reagent, free of heating and cooling operation, low in energy consumption, good in product quality, high in yield and wide in commercial development prospect, the synthesis efficiency and operation convenience are greatly improved, and the time cost is reduced.

The invention discloses a method for preparing PETG biodegradable copolyester from mixed polyester. The method comprises the following steps: mixing waste PET polyester, PGA polyester, an alcoholysis agent and a catalyst, heating to carry out alcoholysis reaction, controlling alcoholysis reaction conditions to depolymerize PET until the number-average molecular weight is 1000-2000g / mol, stopping the reaction, and then completing condensation polymerization under a high vacuum condition to obtain the PETG copolyester. According to the scheme, the process route is simple, the using amount of the catalyst is small, the catalyst does not need to be supplemented during condensation polymerization, energy consumption is low, conversion from non-degradable PET to biodegradable copolyester is achieved, and the method has important significance for relieving the plastic pollution problem.

The invention relates to the technical field of herbicide mother liquor purification, and discloses a membrane integration system for herbicide mother liquor purification, which comprises a mother liquor box, the mother liquor box is connected with a primary membrane assembly pipeline, the primary membrane assembly is used for treating mother liquor in the mother liquor box, the primary membrane assembly is connected with a secondary membrane assembly pipeline, and the secondary membrane assembly is used for treating mother liquor in the mother liquor box. The second-stage membrane assembly is used for treating permeate of the first-stage membrane assembly, the second-stage membrane assembly is in pipeline connection with the electrodialysis device, the electrodialysis device is used for treating permeate of the second-stage membrane assembly, the electrodialysis device is respectively in pipeline connection with the third-stage membrane assembly and the first evaporator, and the third-stage membrane assembly is used for treating thin liquid of the electrodialysis device. According to the invention, the membrane technology is integrated into the recovery treatment of the herbicide mother liquor, and impurities in the herbicide mother liquor are removed in a physical separation manner, so that the complexity of the traditional process is reduced, and herbicide components with higher purity are recovered; a cleaner and more efficient method is explored for separation and extraction of herbicides.

The invention relates to the technical field of fine chemical engineering, in particular to the field of IPC C07C303, and more particularly relates to alicyclic ethoxylated sodium bisphenol sulfonate and a preparation method thereof. A structural general formula is shown as a formula 1: # imgabs0 #, wherein X comprises one of O, CH2 and (CH3) 2C, and R comprises an unsaturated ring. The preparation method comprises the following steps: S1, etherification reaction: adding cycloolefin, an ethoxylated bisphenol compound and an acidic catalyst into a reaction solvent, heating for reaction, and removing the solvent, the catalyst and excessive cycloolefin to obtain an alicyclic ethoxylated bisphenol intermediate; and S2, sulfonation and neutralization reaction: cooling the intermediate, dropwise adding a sulfonation reagent for reaction, and performing post-treatment to obtain the product. The preparation method is simple and mild, and has good water solubility and surface activity.

The invention discloses a method for preparing diethylhexyl butyrylamide triazinone, which comprises the following steps: S1, in the presence of an organic acid-binding agent, carrying out substitution reaction on N-tert-butyl-4-aminobenzamide and cyanuric chloride in a non-polar solvent at-10 DEG C to 60 DEG C for 1-6 hours to obtain an untreated substitution reaction mixture; and S2, adding isooctyl p-aminobenzoate into the substitution reaction mixture obtained in the step S1, and carrying out a reaction at 15-120 DEG C for 3-15 h so as to finally prepare the diethylhexyl butyramido triazinone. According to the method, the organic acid-binding agent is used, so that the substitution reaction is more stable, byproducts are fewer, and the product purity is higher. Meanwhile, due to the adoption of the organic acid-binding agent, a non-polar solvent can be conveniently used in the step of substitution reaction, so that a substitution reaction mixture can be directly subjected to next-step reaction with isooctyl p-aminobenzoate without treatment, and the one-pot preparation of the diethylhexyl butyrylamide triazinone is realized.

The application belongs to the technical field of organic synthesis, and particularly relates to a preparation method of 4-bromopyrazole [3,4-D] -pyrimidine, and the specific steps are as follows: under the condition of anhydrous and anaerobic, 4-chloro-1H-pyrazolo [3,4-d] pyrimidine is reacted with a brominating reagent in an aprotic solvent to obtain 4-bromopyrazole [3,4-D] -pyrimidine. The preparation method provided by the application has the advantages of simple process route, clear steps, high yield of the target product, low cost, suitability for industrial production, considerable economic benefits, mild reaction condition and environmental protection.

This invention belongs to the field of electromagnetic wave absorbing materials technology, specifically relating to an absorbing material, its preparation method, and its application. This invention uses multi-walled carbon nanotubes (MWCNTs), potassium permanganate (KMnO4), and divalent manganese as raw materials, based on Mn... 2+ With MnO4 ‑ The redox reaction between the two components allows for in-situ uniform loading of MnO2 nanoparticles onto the MWCNT surface through simple stirring in a room-temperature liquid environment, resulting in microwave absorption performance superior to most similar absorbing materials. Compared to traditional methods for preparing absorbing materials, the technical route of this invention offers significant advantages, including simple preparation process, no pollutant emissions, energy-saving and environmentally friendly process, adjustable and controllable material structure, excellent microwave absorption performance, and scalability. This method effectively overcomes the technical limitations in the preparation of absorbing materials, providing a scalable new paradigm for the green and large-scale production of high-performance absorbing materials.

The present invention belongs to the field of biochemical engineering, and specifically relates to a method for producing an indoxacarb intermediate by using nano-ferrous carbonate immobilized hydroxylase. It includes preparing an indoxacarb intermediate (S)-5-chloro-2-methoxycarbonyl-2-hydroxy-1-indanone by preparing nano-ferrous carbonate immobilized hydroxylase and polydopamine-modified nano-ferrous carbonate immobilized hydroxylase. The nano-ferrous carbonate immobilized hydroxylase of the present invention has the advantages of small particle size, good dispersibility, high reuse efficiency, etc., and its surface is covered with a polydopamine film, which further improves the stability and reuse rate of the biocatalyst, and the nano-ferrous carbonate immobilized hydroxylase does not rely on expensive cofactors. The process route of the present invention is simple, no expensive catalyst is required, the production cost is low, the by-products are less, and the production efficiency is high.

The application discloses a kind of FeCoNi nanoparticle loaded yeast-derived carbon composite wave-absorbing materials and preparation method thereof.The method uses yeast as biomass carbon source, and yeast-derived carbon is obtained by hydrothermal carbonization;Then, the three-metal precursor salt (Fe2+, Co2+, Ni2+) is dissolved in the solvent according to a certain mass ratio with yeast-derived carbon, and FeCoNi nanoparticles are in-situ loaded on the surface of yeast-derived carbon by hydrothermal impregnation method, and the composite wave-absorbing material is obtained after drying and inert atmosphere heat treatment.The FeCoNi nanoparticles in the obtained material are uniformly dispersed on the surface of carbon material, and the synergistic effect of dielectric loss and magnetic loss is utilized to achieve excellent electromagnetic wave absorption performance.The method is simple, low in cost, and requires small equipment, and the prepared material is environmentally friendly, sustainable, and has strong controllability, etc., and is suitable for radar stealth field.

The invention relates to a preparation method of cyclopentadecanolide. The method comprises the following steps: starting from cyclododecanone, firstly carrying out cycloaddition reaction on cyclododecanone and methyl vinyl ketone under the catalysis of Lewis acid to generate spiro lactone, and then carrying out hydrogenation ring-opening rearrangement under the condition of a metal catalyst to generate cyclopentadecanolide. The two-step reaction designed by the invention adopts a one-pot method, no other solvent is used in the synthesis process, no wastewater is generated, the method is safe and environment-friendly, and the product yield is up to 95% or above. # imgabs0 #

This invention relates to the field of membrane technology, specifically to a nitrogen-doped carbon nanofiber catalytic membrane loaded with monatomic iron, its preparation method, and its application. It includes the following steps: (1) dissolving polyacrylonitrile and ferric chloride hexahydrate in a solvent to obtain an electrospinning precursor solution; (2) electrospinning the electrospinning precursor solution to obtain a precursor fiber membrane; (3) calcining the precursor fiber membrane under a protective atmosphere to obtain a nitrogen-doped carbon nanofiber catalytic membrane loaded with monatomic iron. The nitrogen-doped carbon nanofiber catalytic membrane loaded with monatomic iron prepared by this invention achieves near-complete utilization of metal atoms in advanced oxidation processes, significantly improving pollutant degradation activity and reaction kinetics; this material also possesses excellent structural stability and recyclability, providing a new design concept and technical path for developing efficient and scalable water treatment catalytic materials.

The invention discloses a method for synthesizing cyclopentadiene from a biomass platform compound levulinic acid and a derivative thereof, which is characterized in that levulinic acid or the derivative thereof is used as a raw material and is converted into a target product cyclopentadiene in one step in a fixed bed continuous reactor under the action of an AxByOz type composite metal oxide catalyst. The method is simple in process route and environment-friendly, the catalyst is simple to synthesize, and a brand-new way is provided for synthesizing renewable cyclopentadiene from levulinic acid and derivatives of levulinic acid.

The invention discloses a PEM electrolyzed water catalyst carrier and a preparation method and application thereof. The PEM electrolyzed water catalyst carrier is of a nano needle-shaped structure, the length of the nano needle-shaped structure is 50-200 nm, the diameter of the nano needle-shaped structure is 5-20 nm, and the length-diameter ratio of the nano needle-shaped structure is (10-20): 1; the molecular formula is AxTi (1-x) O2, x is 0.01-0.05, and A is a metal. The catalyst carrier disclosed by the invention is simple in process, low in cost and easy for large-scale production, and the nanostructure and crystalline phase composition of the carrier can be accurately controlled; the catalyst carrier is in a nanoneedle shape, and is high in conductivity, large in specific surface area and excellent in stability; the carrier has the advantages of high catalytic activity, low precious metal consumption and long service life when being applied to a PEM electrolyzed water catalyst.

The invention discloses a preparation method of fatty alcohol potassium phosphate with high monoester content, which comprises the following steps: esterifying fatty alcohol by using polyphosphoric acid as a phosphorylation reagent, dissolving by using a mixed organic solvent consisting of an oxygen-containing polar solvent and a non-polar solvent, washing with water, dropwise adding a potassium hydroxide solution, and reacting to obtain the fatty alcohol potassium phosphate with high monoester content. The high-quality fatty alcohol potassium phosphate can be obtained. According to the fatty alcohol potassium phosphate product obtained through the preparation method, the residual amount of phosphoric acid is lower than 500 ppm, the residual amount of fatty alcohol is lower than 0.5%, and the preparation method is mild in reaction condition, short in reaction time, high in selectivity, high in conversion rate, environmentally friendly, easy to operate, simple in process route and easy to control.

This invention belongs to the field of pharmaceutical chemistry, specifically relating to a lasmidetane-terephthalic acid salt and its preparation method. The crystal form of this salt consists of two molecules of lasmidetane and two molecules of terephthalic acid as basic units. This crystal form exhibits high chemical stability and significantly improves the dissolution rate of lasmidetane, meeting the stringent requirements of formulation development for the dissolution and absorption of the active ingredient. Furthermore, the preparation method is simple and suitable for industrial production.

The application discloses a kind of electrode material of tin phosphide composite tin element and its preparation method and application, belong to battery material technical field.Salt and graphene oxide are mixed, and precursor Sn6O4 (OH) 4 / GO is obtained by reacting with alkaline solution;Sn6O4 (OH) 4 / GO and NaH2PO2·H2O are 1:10 mass ratio, in inert atmosphere, with 5 ℃ / min speed to 500 ℃ calcination 3 h, and Sn / Sn4P3 / RGO is obtained.The application uses Sn6O4 (OH) 4 / GO with low crystallinity, rich hydroxyl and rich defect as reactive precursor, by controlling the amount of phosphorus source, phosphorization temperature and heating rate, tin element and tin phosphide form in situ in the reduction of graphene oxide conductive network Close heterojunction.The composite material can inhibit tin particle migration, agglomeration, improve electron / ion transport kinetics, suitable for lithium ion battery and sodium ion battery.