84 results about "Stannous Chloride Dihydrate" patented technology

The invention discloses an EPDM (ethylene propylene diene monomer) rubber insulated / jacketed cable with high strength, oil resistance and aging resistance. The EPDM rubber insulated / jacketed cable comprises following raw materials: EPDM rubber, nitrile butadiene rubber, maleic anhydride grafted polypropylene, an ethylene-vinyl acetate copolymer, diphenyl hexadiphthalein diamine, stearic acid, zinc oxide, superfine fully vulcanized powder nitrile butadiene rubber, tin(II) chloride dehydrate, bromo-octyl-phenolic curing resin, calcined kaolin, zinc methacrylate, carbon nano tubes, superfine silica, calcium sulfate whiskers, polyacrylonitrile fibers, a silane coupling agent, lanthanum glutamic dithiocarbamate, petroleum wax, naphthenic oil, an anti-aging agent and an accelerator. The EPDM rubber insulated / jacketed cable material with high strength, oil resistance and aging resistance serves as insulation and / or a jacket in a cable and has high strength, good oil resistance, aging resistance and combination properties and long service life.

The invention discloses a high-temperature-resisting pressure-sensitive adhesive for an adhesive tape, the adhesive tape and a preparation process. The high-temperature-resisting pressure-sensitive adhesive comprises main body rubber, an auxiliary material additive, a tackifying agent, a plasticizer, a solvent and a curing agent, wherein the main body rubber is composed of natural rubber and / or synthetic rubber, the auxiliary material additive comprises stannous chloride dihydrate and an anti-aging agent, mass mole ratios of the stannous chloride dihydrate and the anti-aging agent to the main body rubber are 0.2:100-8:100 and 0.1:100-10:100 respectively, the mass mole ratio of the tackifying agent to the main body rubber is 10:100-200:100, and the mass mole ratio of the plasticizer to the main body rubber is 5:100-40:100. The high-temperature-resisting pressure-sensitive adhesive is excellent in initial adhesive performance, high in cohesion, good in stripping performance, high in high-temperature resistance, especially applicable to preparation of masking tapes and capable of greatly facilitating the application of the masking tapes in high-temperature environments.

The invention discloses a preparation method of a nano Ag-SnO2 electric contact composite, which comprises the steps of: preparing a sol solution by using stannous chloride dehydrate as a raw material, adding a silver nitrate solution, controlling Sn<2+> sol particles and Ag<+> ions in the solution to generate a chemical reaction in situ through regulating a pH value so to prepare Ag-SnO2 intermediate composite particles with the content of SnO2 of 10-90 percent; then mixing the Ag-SnO2 intermediate composite particles with pure silver powder, reducing the SnO2 content to 5-30 percent; and pressing, sintering and thermally extruding to obtain the electric contact composite with nano SnO2 reinforced phase particles in a funicular distribution state in a matrix. Sol and gel are combined to generate the chemical reaction; and by the assistance of ultrasonic waves, the particle diameter (nano level) of the Ag particles and the SnO2 particles in the intermediate particles and the dispersion distribution of the Ag particles and the SnO2 particles are controlled effectively, the compatibility of the matrix and the reinforced phase is improved, and the interface binding strength of the matrix and the reinforced phase is improved.

The invention discloses a method for preparing a comby stannous oxide nanometer material. The method comprises the following steps of: putting stannous chloride dehydrate in a hexadecyl trimethyl ammonium bromide aqueous solution under the condition of stirring by adopting a hydro-thermal synthesis method to obtain a mixed solution; then, dropwise adding a sodium hydroxide aqueous solution to the mixed solution; stirring to obtain a final mixed solution, wherein in the final mixed solution, the molar concentration of the stannous chloride dehydrate is controlled to be between 0.10mol / L and 0.15mol / L, and the molar ratio of the stannous chloride dehydrate to hexadecyl trimethyl ammonium bromide to sodium hydroxide is 1:1:(2-4); putting the final mixed solution in a reaction kettle, wherein the degree of filling is 80-90 percent, and performing a hydrothermal reaction for 12-15h at the temperature of 120-160 DEG C; and performing centrifugation, washing and drying on the obtained product to prepare the comby stannous oxide nanometer material. The prepared comby stannous oxide nanometer material has an even porous structure and can be applied in the aspects of lithium ion battery anode materials, chemical synthesis catalysts and the like. The method disclosed by the invention has the characteristics that the operation is simple, the cost is low, the pollution is low and industrial large-scale production can be easily realized.

The invention relates to a method for preparing porous spherical stannous oxide nano material. The method comprises the steps of: slowly dripping a certain amount of prepared sodium hydroxide anhydrous ethanol solution into stannous chloride anhydrous ethanol solution, and stirring while dripping; after dripping, continuously stirring for 10-20min to obtain stannous oxide precursor liquid, wherein in the obtained stannous oxide precursor liquid, the molar concentration of dihydrated stannous chloride is controlled to be 0.125-0.25mol / L and the molar ratio between the dihydrated stannous chloride and sodium hydroxide is controlled to be 1: 2-1: 3.5; putting the prepared stannous oxide precursor liquid into a reaction kettle, wherein the filling degree is 80-90%; sealing the reaction kettle, and carrying out heat preservation on the reaction kettle in an electric constant temperature drying oven for 6-15h at the temperature of 130-170 DEG C; then naturally cooling the reaction kettle to room temperature; and carrying out centrifugation, washing and drying on the product to obtain gray black nano stannous oxide material. The method is simple in operation, mild in condition, easy in control of the condition, low in cost, less in pollution and easy for industrial production; and the prepared porous spherical stannous oxide nano material has the advantages of being even in morphology, high in component purity and the like.

The invention discloses a preparation method of ethoxyquin serving as an antioxidant. The preparation method comprises the concrete steps of heating to react after mixing 2-nitro-5-ethoxyphenylboronic acid, DMF, sodium carbonate, tetrakis(triphenylphosphine)palladium and 4-bromo-2-methyl-2-hydroxyl-3-pentene; then, filtering the reactants, carrying out reduced pressure distillation and re-crystallizing to obtain a faint yellow solid; adding a hydrochloric acid solution and stannous chloride dihydrate, and reacting for 10-16 hours by stirring; next, extracting a reaction solution by using dichloromethane, sequentially washing an organic phase by using a sodium carbonate solution, water and a saturated sodium chloride solution; and removing a solvent after drying to obtain an oily matter, namely ethoxyquin serving as the antioxidant. According to the preparation method, a novel synthesis route is adopted, and a great deal of methylbenzene and acetone are not needed in synthesis reaction, so that human injuries can be reduced, and environment pollution can be reduced; and the reaction conditions are mild, the reaction time is short, and the purity of ethoxyquin in a final product obtained through reaction is larger than 97% which is far higher than the purity of the existing product sold on the market.

The invention discloses chelating resin bonded with dithizone and a method for preparing the same. A functional group of the resin is a dithizone group the construction unit of which is as shown in the graph. The preparation method comprises the following steps: styrene is taken as a monomer, diethylene is taken as a cross linking agent, fluid wax and other substances are taken as a pore-forming agent, magnesium carbonate and other substance are taken as a dispersing agent, and benzoperoxide is taken as an initiator, nitrating agents with different composition proportions are added for nitration and reduction so as to obtain macroporous amino resin, and stannous chloride dihydrate, hydrochloric acid and ethanol are added for diazotization, and acetone solution of the dithizone and glacial acetic acid are added to introduce the functional group so as to obtain the chelating resin bonded with the dithizone. Compared with the loaded resin, the stability of the functional group of the resin is obviously improved, so that the resin has wide application prospect in fields such as the metal separation and pre-enriching in the trace analysis, the heavy metal pollution treatment and recovery in the environment.

The invention relates to a method for fast synthesizing powder of stannum selenide quanta dots, belonging to the technical field of processing nanometer inorganic compound material of semiconductor. With stannous chloride dehydrate and sodium selenite as raw materials, cetyltrimethyl ammonium bromide as surfactant, and in the alkaline solution of sodium hydroxide, stannum selenide quanta dots are synthesized by being radiated by electron beams. The nanometer powder of stannum selenide is obtained after separating the synthesized product. The granular stannum selenide quanta dots of the invention have extremely good water solubility, good monodispersity, and even size with an average particle size of 2.5 nm and good photoelectric property.

The invention provides a method for preparing a platinum-tin oxide sensor membrane capable of being used for methane detection, and belongs to the technical field of gas sensors. Dehydrate stannous chloride and chloroplatinic acid are mixed, a platinum-tin oxide material is prepared through the electrostatic spinning method, then the platinum-tin oxide material is prepared into the membrane through the screen printing method, the sample can stably detect 600-10000 ppm methane at the test temperature of 100 DEG C, and 50 ppm methane can be stably detected at the test temperature of 300 DEG C. The method is easy and convenient to use in the operation process, preparation cost is low, repeatability is good, and the obtained material is excellent in performance and has high application value and good prospects.

The invention discloses a preparation method of tin-based oxide with controllable components and a photocatalytic application of the tin-based oxide. The preparation method is characterized in that the tin-based oxide is prepared from stannous chloride dihydrate with one-step hydrothermal method, and samples with four different components including Sn<2+> / SnO2, SnO / SnO2, SnO or SnO2 are synthesized selectively through control of composition of a hydrothermal solution, wherein Sn<2+> / SnO2 and SnO / SnO2 show efficient photocatalytic degradation decoloration activity to methyl orange under visible light. The samples are selectively synthesized with the one-step hydrothermal method, the preparation process is simple, raw materials are cheap and available, defects of the complexity of a traditional synthesis method and uncontrollability of composition of target products are overcome, and application and popularization prospect is realized.

The invention discloses a nitrogen dioxide gas sensor containing petal-like SnSe2. The nitrogen dioxide gas sensor comprises a gas sensitive material and a heating substrate, wherein the heating substrate is coated with the gas sensitive material, the coating thickness ranges from 1-100 micrometers, and the gas sensitive material is prepared from a petal-like SnSe2 nanomaterial. A preparation process includes the following steps: step 1, mixing 1.6-2.4 mL of C2H8N2 with 30.4-45.6 mL of (CH2OH)2, adding 361-541.6 mg of stannous chloride dihydrate and 126.3-189.5 mg of selenium powder, performing magnetic stirring for 20-30 minutes, pouring the mixture into a reaction kettle for 3-12 hours of reaction at the temperature of 165-180 DEG C, separating an obtained black product by a centrifugalmachine, repeatedly performing washing until the pH of waste liquid is 6.5-7.5, and drying the waste liquid at the temperature of 80 DEG C for 6-12 hours to obtain the petal-like SnSe2; step 2, preparing SnSe2 dispersion liquid; step 3, coating the dispersion liquid onto the heating substrate, and drying the heating substrate in a drying box at the temperature of 80 DEG C to obtain the nitrogen dioxide gas sensor. The nitrogen dioxide gas sensor provided by the invention has the advantages of simple process step, low cost and sensitive response to nitrogen dioxide.

The invention discloses a preparation method of an intermediate for synthesizing carbapenems penicillin etapenem having the formula of VII. The preparation method comprises the following steps: allowing a compound having the formula of I and 4-methoxybenzyl chloride to react to obtain a product; reacting under the action of stannous chloride dehydrate, and regulating pH to 7; performing condensation reaction of above product and activated ester of PNZ L-hydroxyproline; reacting with methylsulfonyl chloride; reacting with potassium thioacetate; and hydrolyzing in acidic or alkaline condition, wherein PMB is shown in figure (1), PNZ is shown in figure (2), Ms is mesyl, and Ac is acetyl. The preparation method can be carried out at the room temperature, with the advantages of mild reaction condition, low cost, and easily realized industrial production.

The invention provides a method for preparing reagent-grade stannous chloride dehydrate crystals from industrial-grade raw materials. The method comprises the following steps: melting industrial tin ingots and quenching the molten industrial tin ingots into tin flower; then enabling reaction between filtered industrial hydrochloric acid and tin hydroxide to produce stannic chloride pentahydrate; adding the tin flower into the stannic chloride pentahydrate solution; enabling heat-insulating reaction for 12-18 h at 100-105 DEG C; when the mass concentration of quadrivalent tin in the solution is detected to be less than 0.01%, concentrating under reduced pressure till the specific weight of the solution is 2.0-2.4; filtering the solution into a cooling device to be cooled for 12-20 h at 0-10 DEG C; then discharging; carrying out vacuum suction filtration and centrifugal separation to obtain the required reagent-grade stannous chloride dehydrate crystals. The preparation method is short in process route, simple to operate, easy for processing parameter control and relatively high in production efficiency; the obtained product can meet the standards of the reagent-grade (high-purity) stannous chloride dehydrate crystals without crushing or screening, and can satisfy the requirements of industries (such as chemical analysis, catalytic synthesis and PCB colloid-Pd sensitization) which demand much on the quality of stannous chloride.

The invention relates to a method for quickly synthesizing a tin selenide nano sheet by microwave assistance. The method comprises the following steps of (1), taking and mixing stannous chloride dihydrate, selenium powder, potassium hydroxide and ethylene glycol, and then heating in an oil bath; (2), continuously adding potassium borohydride, heating in the oil bath until no air bubbles, and cooling to room temperature; (3), next, transferring into a microwave oven, heating by a microwave, cooling, separating, washing and drying, so that a target product is subsequently obtained. Compared with the prior art, the method adopts the microwave for carrying out a reaction and heating to control the synthesis of the tin selenide nano sheet, is simple in process, quick in synthesis, higher in yield, and the like.

The invention discloses a nano tin-modified nitrogen-doped carbon anode material and a preparation method thereof, comprising the following steps: adding polyvinylpyrrolidone into absolute ethanol according to a first mass ratio, continuously stirring, and dissolving to obtain a solution; Adding stannous chloride dihydrate into the solution according to a second mass ratio, and continuously stirring to obtain a mixed solution; Adding distilled water into the mixed solution according to a first molar ratio, continuously stirring for a specified time to obtain a precursor dispersion; The precursor dispersion is placed in a vacuum drying oven and dried by a designated drying process to obtain a precursor; The precursor was heat-treated in an inert atmosphere by a specified heat treatment process to obtain a nitrogen-doped carbon anode material modified with nano tin. The nano tin modified nitrogen-doped carbon negative electrode material prepared by the preparation method of the inventionuniformly disperses in the nitrogen-doped carbon material, has high first coulombic efficiency, specific capacity, rate performance and capacity retention rate, and has important application value.

The invention relates to a method for preparing a copper tungstate photo-anode film. The method comprises the steps of (1) preparing organic solutions containing copper and tin, wherein the solutions are ethylene glycol monomethyl ether with the dissolution of copper nitrate trihydrate and the concentration of 0.04-0.08mol / L and ethylene glycol monomethyl ether with the dissolution of stannous chloride dihydrate and the concentration of 0.04-0.08mol / L, (2) mixing (5-x) ml copper solution and X ml tin solution prepared in the step (1) to be uniform, (3) adding ammonium metatungstate with an equimolar amount, adding 0.1-0.7ml concentrated nitric acid and 10 to 100mg ammonium nitrate, stirring the solution to be clear to obtain a precursor solution, (4) using a pipettor to take a certain amount of precursor solution prepared in the step (3), dripping the solution on a fluorine doped tin oxide conductive substrate to be heated for 20 min on a heating plate of 70 DEG C, and removing an organic solvent, and (5) burning the fluorine doped tin oxide conductive substrate covered by a film of precursor in a muffle furnace with the temperature of 550+ / -50 DEG C, and taking the substrate out to be naturally cooled to a room temperature to obtain a corresponding tin doped copper tungstate film.

The invention relates to an alcohol gas sensor designed based on an alcohol molecular imprinting mechanism. The high-performance alcohol gas sensor is composed of a ceramic pipe and an SnO2 film which is uniformly and densely distributed on the surface of the ceramic pipe and has a network structure, wherein the grain diameter of nano SnO2 in the SnO2 film is 9+ / -2 nanometers; BJH pore diameter distribution is intensive; the average pore diameter is 4.3+ / -0.1 nm. A preparation method comprises the following steps: dissolving stannous chloride dihydrate (SnCl12*2H2O) into a mixed solution of water and alcohol; carrying out a hydrothermal reaction and calcining to prepare a white medium-pore-diameter SnO2 nano material with a network structure; adding alcohol and mixing to prepare slurry; uniformly coating the ceramic pipe with the film; and drying to prepare the sensor. According to the alcohol gas sensor provided by the invention, the range of the concentration of alcohol gas detected is 4ppm-100ppm, the responding time is 6+ / -2 seconds and the recovering time is 22+ / -3 seconds.

The invention discloses a solvothermal coreduction method for preparing a tin / graphene nanometer composite material. The method comprises the following steps: sequentially adding an ethanol solution of polyvinylpyrrolidone, an ethanol solution of dihydrate tin chloride and an ethanol solution of graphene oxide into a reactor sequentially and mixing uniformly in the argon environment; adding an ethanol solution of sodium borohydride into the mixed solution, stirring uniformly at a room temperature and performing reduction reaction; and after the reaction, washing and drying to obtain the tin / graphene nanometer composite material. The reduction degree of the graphene oxide in the tin / graphene nanometer composite material prepared by the method is high, equipment and the process are simple, and a green and environment-friendly method is provided for preparation of tin / graphene.

The invention relates to a preparation method of olivary porous stannic oxide sensitive to hydrogen sulfide. The preparation method comprises the steps of respectively dissolving 0.4g of surface active agent polyvinylpyrrolidone (k=30) and 0.8g of polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (PEO-PPO-PEO) in a solvent prepared by 60ml of deionized water and ethanol solution in a volume ratio of 1:3; dissolving stannous chloride dihydrate and oxalic acid dihydrate in a molar ratio of 1: 10 to 1: 30 in a settled solution of (1); pouring the solution into a 100ml hydrothermal reaction kettle to have hydrothermal reaction at the temperature of 180 DEG C for 12 hours; centrifugally separating, washing and annealing a reaction product to obtain olivary porous stannic oxide nano particles sensitive to hydrogen sulfide. The prepared stannic oxide nano particles are good in selectivity and response property to toxic and harmful gas, namely hydrogen sulfide. The olivary porous stannic oxide has characteristics of simple and easy preparation method, good product performance and the like, so that the stannic oxide nano particles have good application prospects in the field of a gas-sensitive sensor.

The invention relates to a preparation method for a graphene / stannic oxide sandwich-structured thin film on the surface of an aluminium alloy bipolar plate. The preparation method comprises the following steps of (1) mixing deionized water and absolute ethyl alcohol, adding stannous chloride dihydrate and regulating pH to 9-10 to obtain a hydrothermal precursor solution; (2) putting the pre-processed aluminium alloy bipolar plate into a NaOH solution, performing chemical etching, cleaning and drying; (3) performing cyclic self-assembling on the chemically-etched aluminium alloy bipolar plate in a PDDA water solution and a graphene oxide water solution for one or more times alternately, and then taking out and cleaning and drying; and (4) putting the aluminium alloy bipolar plate self-assembled in the step (3) into the prepared hydrothermal precursor solution prepared in the step (1) to perform a hydrothermal reaction, and then cleaning and drying to complete the preparation process. Compared with the prior art, simple operation, low cost, good etching effect and the like are achieved.

The invention discloses a printed circuit board chemical copper plating activation solution. The printed circuit board chemical copper plating activation solution comprises the following raw materials in parts by mass: 100-300 parts of stannous chloride dihydrate, 2-6 parts of palladium chloride, 150-180 parts of sodium chloride, 4-8 parts of sodium stannate trihydrate, 20-30 parts of additives, 0.5-2 parts of a reducing agent and 500-600 parts of deionized water. By adopting a sodium chloride solution, palladium chloride is prepared into liquid A, and stannous chloride dihydrate and the reducing agent are prepared into liquid B; under an ultrasonic action, the liquid A is dispersed into the liquid B, and sodium stannate trihydrate, the additives and the reducing agent are assisted as auxiliary stabilizing agents to prepare the chemical copper plating activation solution. The chemical copper plating activation solution disclosed by the invention is used for activating a printed circuit board before chemical copper plating, can achieve the effects of activating the non-conductor surface of the printed circuit board and performing hole activation on the printed circuit board, and has the advantages of achieving low hydrochloric acid content and high stability, saving the raw materials and reducing the environmental pollution without damaging a substrate of the printed circuit board.

The invention relates to a preparation method of an SnO<2>-TiO<2>@ graphene ternary composite nanomaterial. By a one-step method, with pyrolyzed and reduced graphene oxide, stannous chloride hydrate (SnCl<2>.2H<2>O) and titanyl sulfate (TiOSO<4>) as raw materials, and water and ethanol as solvents, the SnO<2>-TiO<2>@ graphene ternary composite nanomaterial with a uniform structure is obtained under the action of hydrochloric acid by a simple hydrothermal synthesis method. From an XRD spectrogram, according to the prepared SnO<2>-TiO<2>@ graphene ternary composite nanomaterial, crystalline phases of two metal oxides SnO<2> and TiO<2> coexist in the composite material; and the SnO<2>-TiO<2>@ graphene ternary composite nanomaterial prepared by the method has a potential application prospect in the fields of new energy and the like.

The invention provides a preparation method of a multi-color electrochromic thin film with a tin dioxide / vanadium pentoxide core-shell structure. The preparation method comprises the following steps that a stannous chloride dihydrate compound is dissolved into an aqueous solution of hydrochloric acid and mercaptoacetic acid, then the mixture is added into a reaction kettle with a conductive substrate, and after hydrothermal reaction, high-temperature heat treatment is carried out to obtain a uniformly-grown tin dioxide nanosheet array; and vanadyl sulfate hydrate is treated as a vanadium source, vanadium pentoxide is deposited on the tin dioxide nanosheet array by using a constant potential method, and finally heat treatment is carried out in the air to obtain the multi-color electrochromic thin film with the core-shell structure. According to the preparation method, tin dioxide nanosheets are perpendicular to the substrate, grow uniformly and are distributed uniformly, and the vanadium pentoxide uniformly fills gaps of the nanosheets and is coated on the surfaces of the nanosheets. The composite thin film has excellent cycling stability and electrochromic performance, the rapid reversible transformation can be realized among blue, green and yellow, and the thin film is expected to be applied to the field of self-adaptive camouflage of marine, oasis and desert environments.

The invention discloses a preparation method of a graphene lithium ion battery anode material doped with copper zinc tin sulfide. The method comprises the steps that copper acetate hydrate, zinc acetate, tin chloride dihydrate, sodium sulfide and graphene which are low in price serve as basic raw materials, the production cost is low, all the raw materials are easy to obtain, and the purity is guaranteed. Meanwhile, the mass ratio or the molar ratio of all reactants are easy to control in the production process, the operability is high, and practical production is facilitated. Graphene greatly improves the electro-chemical activity of an electrode and synergistically cooperates with a copper zinc tin sulfur base material, graphene and the copper zinc tin sulfur base material are interacted with each other, the situation that the copper zinc tin sulfur base material serves as the anode material is avoided, larger size expansion and contraction occur before or after lithium ions are inserted into or taken out, long-time safety, stability and reliability of the electro-chemical activity of the electrode are effectively guaranteed, and therefore the performance in all aspects such as electric conduction, capacity, charging and discharging and service life of a lithium ion battery is effectively improved.

The invention discloses a double pulse plating solution for preparing lead-free Sn-Cu alloy solder and a plating process. Metal Si wafers are put in a plating solution, and a dual-pulse current is communicated for double pulse plating. The plating solution comprises chemical compositions: 0.4-0.5mol / L of ammonium citrate tribasic, 0.2-0.25mol / L of stannous chloride dehydrate and 0.025-0.035mol / L of copper chloride dihydrate which are analytically and purely prepared. The parameters of the double pulse plating solution comprise: frequency is 80-120Hz, the duty ratio of double pulses is 18-22%, positive / negative pulse time is 900-1100 / 90-110ms, and current density is 9-11mA / cm2. The method reasonably selecting a plating solution formula and pulse electrodeposition process parameters to prepare the Sn-Cu alloy solder improves the plating rate, and the prepared Sn-Cu alloy solder has the advantages of low roughness, uniform thickness, level surface, less pores, dense structure and small stress in a plating layer.

The invention belongs to the technical field of catalyst preparation and relates to a palladium-tin nano-chain network catalyst and a preparation method and application thereof. The method comprises the following steps of (1) adding polyvinyl pyrrolidone to a glycol solution and carrying out ultrasonic mixing evenly; (2) adding ammonium chloropalladate, stannous chloride dehydrate and citric acidto a solution obtained in the step (1) and dispersing evenly under ultrasonic conditions; (3) transferring a mixed solution obtained in the step (2) into a hydrothermal reactor, carrying out heating and heat preservation for a period of time and then carrying out temperature reaction for a period of time; (4) cleaning a product obtained in the step (3) and then ultrasonically dispersing the product into ethanol; (5) adding XC-72 carbon powder to the ethanol and dispersing evenly under the ultrasonic conditions; (6) adding the solution obtained in the step (4) to the solution obtained in the step (5) and carrying out ultrasonic mixing evenly; and (7) cleaning the product obtained in the step (6) and then carrying out vacuum drying. The catalyst prepared through the method has very high electrochemically active specific surface area and formic acid oxidative catalytic activity, and is simple in operation and suitable for large-scale preparation.

The invention discloses a high-strength and aging-resistant cable for ships. The high-strength and aging-resistant cable comprises a cable core and a sheath. The sheath is made of modified ethylene propylene diene monomer rubber composite material. The modified ethylene propylene diene monomer rubber composite material is made of modified ethylene propylene diene monomer rubber, polypropylene, maleic anhydride grafted polypropylene, stearic acid, phenolic resin, stannous chloride dihydrate, hexamethylene diamine carbamate, octadecylamine, montmorillonite, nano calcium carbonate, barium sulfate, complex organic alkyl acid phosphate, plasticizer TP-759, 5'5'-dimethyl-5, 10-dihydracridine, N, N'-diphenyl-para-phenylene diamine, anti-aging agent 2246, polybutyl bisphenol-A, tris(nonyl phenyl)phosphite, disproportionated potassium rosinate, vitamin E, polyethylene glycol and accelerator. The high-strength and aging-resistant cable for the ships is good in heat resistance and aging resistance and capable of satisfying the use requirements of the ships.

A method for synthesizing mesalazine is disclosed. The method comprises the following steps: 1) adding p-nitrophenol, p-toluenesulfonic acid, absolute ethyl alcohol and hexamethylenetetramine, stopping heating after the reaction is finished, heating to room temperature while stirring with ice water, separating out solids, filtering, washing and drying to obtain 5-nitrosalicylaldehyde; 2) adding the 5-nitrosalicylaldehyde, potassium tert-butoxide, copper salt and acetonitrile, adding tert-butyl hydroperoxide while stirring, after the reaction is finished, performing vacuum concentration to remove the solvent, pouring cold water into residues, stirring, performing suction filtration, adjusting the pH value of the filtrate with hydrochloric acid, performing suction filtration, and drying to obtain 5-nitrosalicylic acid; and 3) adding stannous chloride dihydrate, concentrated hydrochloric acid, the 5-nitrosalicylic acid and ethanol, carrying out vacuum concentration after the reaction is finished, dissolving residues in water, adjusting the pH value with a concentrated hydrochloric acid solution, standing for crystallization, carrying out suction filtration, washing filter cake with water, and drying to obtain mesalazine. No isomer is generated, and the yield is high; the method does not need high-temperature and high-pressure conditions; the reaction cost is low; and raw materialsand auxiliary materials with high toxicity and heavy environmental pollution are not used.

The invention relates to a hydrothermal preparation method for a tin-cobalt alloy negative electrode material of a lithium ion battery, and belongs to the technical field of chemical electrode material manufacturing technology. Dissolve tin dichloride dihydrate and cobalt dichloride hexahydrate in deionized water; add sodium borohydride to deionized water, stir to dissolve completely, and then mix the two solutions; transfer the prepared mixed solution into a closed In the reaction kettle, after the reaction is completed, the reaction kettle is taken out and cooled to room temperature, and the cloudy liquid containing the black precipitate is suction-filtered, washed and dried to obtain the tin-cobalt alloy negative electrode material. The preparation process of the present invention is simple in operation, easy to control the process, low in energy consumption, friendly to the environment, does not produce secondary pollutants, and obtains a tin-cobalt alloy negative electrode material whose main phase is Co3Sn2, which is displayed when used as a lithium ion battery negative electrode material It has a high initial charge-discharge specific capacity and good cycle performance.

The invention provides a preparation method of a La-SnO2 sensor membrane capable of being used for detecting CO2, and belongs to the technical field of gas sensitive sensors. The method comprises the steps that stannous chloride dihydrate is mixed with lanthanum chloride, a La-SnO2 material is prepared through an electrostatic spinning method, and then the material is prepared into a membrane through a silk-screen printing method. The sample can detect large-range-concentration CO2, and the sensitive value of the sample for 1000 ppm CO2 under air atmosphere reaches up to 3.4. The preparation method is simple, the raw material cost is low, repeatability is good, and the material membrane is excellent in performance and has quite good application value and prospect.