50 results about "Tin chloride" patented technology

The invention provides a preparation method of an antistatic metallocene catalyst. The method comprises the following steps: carrying out thermal activation treatment on a silica gel carrier; loading alkyl tin chloride on the silica gel carrier to obtain an alkyl tin chloride modified silica gel carrier; adding methylaluminoxane into the alkyl tin chloride modified silica gel carrier to obtain a methylaluminoxane / alkyl tin chloride modified silica gel carrier; adding a metallocene compound into the methylaluminoxane / alkyl tin chloride modified silica gel carrier for heating reaction, and then adding an antistatic agent to obtain the antistatic metallocene catalyst. Alkyl tin chloride is used for modifying a silica gel carrier and reacts with hydroxyl to greatly eliminate the hydroxyl; the loading capacity can be improved by combining with MAO, and metallocene combination sites can be increased; after the antistatic agent is added, static electricity generated in the reaction process is reduced, the flaking phenomenon is reduced, and the static electricity range can be controlled to be + / -0.02 KV.

The invention belongs to the technical field of antibacterial photodynamics, and provides antibacterial photodynamics for treating periodontitis by regulating ROS (reactive oxygen species) through microenvironment response and a preparation method of the antibacterial photodynamics. Comprising the following steps: preparing tin sulfide oxide by taking sodium dodecyl benzene sulfonate, tin chloride pentahydrate and L-cysteine as raw materials; zinc nitrate, copper nitrate, urea and thioacetamide are used as raw materials to prepare nano-enzyme; the antibacterial photodynamic material is prepared by taking indocyanine green, bacterial targeting peptide, nano enzyme, tin sulfide oxide and dihydromyricetin as raw materials. The microenvironment response antibacterial photodynamic force aiming at periodontitis infection and treatment characteristics is constructed, the antibacterial photodynamic force is constructed by a strategy of combining bacterial infection microenvironment response ROS programmed regulation and control, precise and long-acting treatment and immune regulation and control, and the curative effect and scene of the antibacterial photodynamic force for treating periodontitis are improved and widened.

The invention belongs to the technical field of coatings, and particularly relates to an aerogel heat preservation and insulation coating, a preparation method and application. The aerogel thermal insulation coating is prepared from the following raw materials in parts by weight: 20-40 parts of deionized water; 1-2 parts of a dispersant; 10 to 20 parts of flame retardant powder I; 1-10 parts of flame retardant powder II; 1-10 parts of superfine heavy calcium carbonate; 1-5 parts of cellulose HECs; 1-2 parts of a multifunctional additive; 1-2 parts of a wetting agent; 1-2 parts of ethylene glycol; 1-2 parts of a defoaming agent; 1 to 5 parts of aerogel; 1-2 parts of a coalescing agent; 1-2 parts of a bactericide; 10 to 20 parts of an emulsion; 1-10 parts of an elastic emulsion; and 10-20 parts of hollow microspheres. The multifunctional auxiliary agent is prepared from the following raw materials: vinyl trimethoxy silane, gamma-glycidyl ether oxypropyl trimethoxy silane, n-dodecyl trimethoxy silane, 3-methyl-1-pentyne-3-alcohol and deionized water, and the multifunctional auxiliary agent is prepared from the following raw materials: trimethoxy silane, gamma-glycidyl ether oxypropyl trimethoxy silane, n-dodecyl trimethoxy silane, 3-methyl-1-pentyne-3-alcohol and deionized water. The bactericide is prepared from the following raw materials: a quaternary ammonium salt bactericide, didodecyl dimethyl dibenzyl ammonium tin chloride, dodecyl triphenyl phosphonium bromide, ditributyltin oxide and a penetrant.

The invention provides a kilogram-level preparation method of an organic photoelectric conjugated tin reagent, and belongs to the field of organic synthesis and organic photoelectric materials. The method comprises the following steps: in a dry 20L reaction device, dissolving a conjugated thiophene compound in tetrahydrofuran, keeping nitrogen positive pressure protection, dropwise adding a tetrahydrofuran solution of n-butyllithium and a tetrahydrofuran solution of trimethyltin chloride in a low-temperature reaction system, stirring for reaction, after the reaction is completed, standing for phase splitting, collecting an organic phase, drying, and concentrating filtrate to obtain the conjugated thiophene compound. And recrystallizing to obtain the organic photoelectric conjugated tin reagent. According to the method, efficient macro preparation of various conjugated tin reagents can be achieved, 1-1.2 kg of target products can be prepared through single-batch reaction, and the method has the advantages of being high in yield, easy and convenient to operate, low in cost, good in environmental friendliness and the like.

The present application relates to the technical field of chemical synthesis, in particular to a method for inhibiting poisoning of a proton exchange membrane in one-pot production of p-chlorophenylhydrazine, which uses p-chloronitrobenzene as a substrate and tin dichloride for reduction reaction to realize one-pot synthesis process of p-chlorophenylhydrazine.The method does not need intermediate separation steps, can directly feed materials, effectively reduces loss of raw materials, and realizes continuous reduction of tin tetrachloride by reasonable inhibition of poisoning of the proton exchange membrane, recycles tin dichloride, and re-puts it into the nitrobenzene reduction step.Compared with the traditional method, the method solves the yield reduction problem caused by p-chlorophenylhydrazine preparation in steps and purification, solves the problem of poisoning of the proton exchange membrane by phenylhydrazine hydrochloride, is suitable for industrial production environment, improves the product yield, reduces environmental pollution, has low cost, and is suitable for efficient continuous production of important chemical intermediate p-chlorophenylhydrazine.

The invention provides an antistatic metallocene catalyst and application thereof. The antistatic metallocene catalyst comprises an antistatic agent / methylaluminoxane / alkyl tin chloride / silica gel carrier and a metallocene compound loaded on the carrier; the antistatic agent / methylaluminoxane / alkyl tin chloride / silica gel carrier is a silica gel carrier modified by an antistatic agent, methylaluminoxane and alkyl tin chloride. Alkyl tin chloride is used for modifying a silica gel carrier and reacts with hydroxyl to greatly eliminate the hydroxyl; the loading capacity can be improved by combining with MAO, and metallocene combination sites can be increased; after the antistatic agent is added, static electricity generated in the reaction process is reduced, the flaking phenomenon is reduced, and the static electricity range can be controlled to be + / -0.02 KV.

The invention discloses an unsymmetrical dimethylhydrazine sensor based on an Ag-doped amorphous zinc stannate (ZnSnO3) sensitive material and a preparation method of the unsymmetrical dimethylhydrazine sensor, and belongs to the technical field of semiconductor metal oxide gas sensors. The preparation method comprises the following steps: firstly, taking tin tetrachloride pentahydrate and zinc chloride as metal precursors, taking citric acid hydrate as a metal complexing agent, preparing a zinc hydroxystannate ZnSn (OH) 6 nano cubic material with a hollow structure through a coprecipitation method and alkali etching, taking the zinc hydroxystannate ZnSn (OH) 6 nano cubic material as a precursor, preparing ZnSnO3 with an amorphous structure after high-temperature calcination, and obtaining an Ag-doped amorphous zinc stannate sensitive material through Ag doping; the material has the characteristics of high response, quick response recovery and low detection lower limit on low-concentration UDMH gas under the working condition of 175 DEG C. The sensor adopting the ceramic tube type structure is simple in manufacturing process, small in size and beneficial to industrial batch production, has important application value and has wide application prospects in the aspect of UDMH detection in a specific environment.

The application provides a palladium-based composite metal oxide semiconductor material and a preparation method thereof and a hydrogen sensor. The preparation of the palladium-based composite metal oxide semiconductor material comprises the following steps: separating and drying a material after a hydrothermal reaction of tin dichloride, urea and nickel nitrate in deionized water to obtain a composite metal oxide; dispersing the composite metal oxide in deionized water, then adding palladium chloride and a reducing agent to perform a reaction; and separating and drying the material after the reaction to obtain the palladium-based composite metal oxide semiconductor material. The mass ratio of the tin dichloride, the nickel nitrate and the palladium chloride is (17-100):(0.05-3):1. The mass ratio of the tin dichloride and the urea is 1:(0.2-1). The palladium-based composite metal oxide semiconductor material prepared by the application has high hydrogen-sensitive selectivity, can quickly detect hydrogen with a low hydrogen concentration, has excellent detection stability, and can be widely used for preparing hydrogen sensors.

The present application relates to a kind of functional materials for organic dye adsorption and degradation and its preparation method and application, belong to pollutant degradation field.The present application uses one-step hydrothermal synthesis method, with anhydrous ferric chloride, tin chloride tetrahydrate and sodium hydroxide as raw material, successfully constructs the Fe (Sn (OH) 6) / FeSnO (OH) 5 heterojunction composite material with close interface combination.The material can realize the efficient removal of typical organic pollutants methylene blue at normal temperature and pressure, and the degradation rate can reach more than 90% in a short time, showing excellent adsorption and degradation performance.The present application has simple process, mild reaction condition, low raw material cost, avoids complex post-processing process, has good scalability and application potential.The material can provide an efficient, economical technical solution for the treatment of refractory organic pollutants in water, has significant environmental benefits and practical application value.

The application discloses a catalyst composition and application thereof, and belongs to the field of chemical industry. The catalyst composition comprises catalyst I and catalyst II, and the molar ratio of catalyst I to catalyst II is 1:5-15. The catalyst I comprises an active component and a carrier. The mass fraction of the active component is 5-10%, and the mass fraction of the carrier is 90-95%. The active component is at least one selected from palladium or platinum. The catalyst II is at least one selected from aluminum chloride, iron chloride, zinc chloride or tin chloride. The catalyst composition provided by the application can obviously improve the conversion rate of acetone and the selectivity of MIBK.

The present disclosure relates to the technical field of preparation of copper chloride, and in particular to a method of preparing an electronic-grade copper chloride dihydrate, which mainly includes the following steps: dissolving a copper salt in a first hydrochloric acid solution to obtain a copper salt solution; performing two solid-liquid separations for the copper salt solution to obtain a filtrate; wherein, the two solid-liquid separations do not have sequence and include an adhesive separation and a co-precipitation separation; the adhesive separation is a solid-liquid separation performed by adding a waste PCB board powder and continuously stirring; the co-precipitation separation is a solid-liquid separation performed by adding tin chloride compound and continuously stirring; adding a second hydrochloric acid into the filtrate and adjusting pH and then performing evaporation concentration to a supersaturated solution, adding copper chloride seed crystal and then performing cooling crystallization and centrifugal separation.

This invention relates to the field of pigment preparation, specifically to a method for preparing highly conductive titanium dioxide using the chloride process. The method includes: reacting oxygen and titanium tetrachloride with an oxidation reaction to generate titanium dioxide particles, which are then introduced into a cooling conduit. A preheated coating agent is added for a coating reaction and slurry preparation. The slurry temperature is adjusted to 60-75°C and the pH to 2-3, and a phosphate-containing compound is added. The slurry temperature is adjusted to 80-90°C, and a sodium aluminate solution and an alkaline solution are added to adjust the pH of the slurry to 9.5-10.5, followed by a first homogenization treatment. A tin chloride solution and a sodium aluminate solution are added, and the pH of the slurry is adjusted to 7.5-8.5, followed by a second homogenization treatment. The pH of the slurry is adjusted to 4.5-5.5, followed by a third homogenization treatment. The pH of the slurry is adjusted to 5.5-6.5, followed by a fourth homogenization treatment. This method is low-cost, simple, and suitable for large-scale production, producing conductive titanium dioxide with excellent performance.

The invention relates to a P-WO3 / SnO2 composite material derived based on phosphotungstic acid as well as a preparation method and application of the P-WO3 / SnO2 composite material. According to the material, a precursor solution containing tin chloride and phosphotungstic acid (HPW) is subjected to electrostatic spinning, and the fiber material with a hollow pipeline structure is prepared by means of a high-temperature calcination process. In the preparation process, a tungstate radical component in phosphotungstic acid is converted into tungsten trioxide (WO3), and the tungsten trioxide (WO3) and stannic oxide (SnO2) form a heterojunction interface. Meanwhile, phosphorus atoms are doped into material crystal lattices, a local electron regulation and control effect is generated, and the electron transfer capacity is enhanced. By adopting a synergistic effect of constructing a heterojunction interface and doping phosphorus element, an electric field built in the interface is effectively enhanced, and oxygen vacancies and an electronic structure of the material are regulated and controlled, so that the gas-sensitive response performance to triethylamine (TEA) gas is remarkably improved. The invention provides a new technical approach for constructing the heterojunction by using the complex oxysalt and cooperatively improving the gas sensing performance in combination with element doping.

The present invention relates to the technical field of waterproofing coil material, and provides a high-strength stainless steel waterproofing coil material and a method for manufacturing the same. [Solution] This high-strength stainless steel waterproof coil material is composed of, from bottom to top, a stainless steel material, a first adhesive layer, a waterproof layer, a second adhesive layer, and an isolation film. The raw materials of the first adhesive layer each contain the following components by weight: 80-90 parts butyl rubber, 10-30 parts polypropylene, 20-30 parts filler A, 12-18 parts adhesion promoter, 0.2-0.5 parts coupling agent, 8-12 parts softener, 1-2 parts tin chloride, 1-3 parts vulcanizing agent, and 2-3 parts accelerator. The adhesion promoter is made of polyurethane and o-ethoxyphenyl isocyanate, and the first adhesive layer and the second adhesive layer are made of the same raw materials. The above technical solution solves the problem of the prior art, which is that stainless steel waterproof coil material has low adhesive peel strength and a significant decrease in adhesive peel strength after immersion in water.

The invention discloses a Sn (II) catalyst and its preparation method and application, preparation method step: S1, skeleton molecule and solvent A are added to a reaction vessel, inert gas is passed through to exclude air, and the reaction vessel is placed in an ice bath to reduce the solution temperature to 0 DEG C, then n-butyl lithium is added, stirred at 0 DEG C for 30min, then stirred at room temperature for 30min to obtain solution A; S2, tin dichloride is dissolved in solvent B to obtain solution B, solution B is added to solution A, stirred at room temperature for 6 18h, then solvent C is added after solvent B is removed by vacuum distillation, and solvent C is extracted to obtain the target product, then solvent C is removed under reduced pressure to obtain Sn (II) catalyst. The Sn (II) catalyst can be used in the defluorination hydrogenation reaction of polyfluoroaromatics or the reduction reaction of nitroaromatics as a catalyst. Compared to traditional transition metal catalysts, the catalyst raw material is easy to obtain, simple to synthesize, and alternative transition metal catalysts can participate in organic synthesis reactions.

The invention discloses a preparation method and application of a nitroreductase response hydrogen sulfide donor with a near-infrared fluorescence report function, and belongs to the technical field of medicine preparation. The preparation method comprises the following steps: mixing m-nitrophenol, K2CO3 and IR-780 iodide in a first organic solvent, reacting, extracting, and carrying out rotary evaporation to obtain a finished product 1; dissolving the finished product 1 in a second organic solvent, co-heating and refluxing with tin chloride and concentrated hydrochloric acid, adding an alkaline solution, and carrying out suction filtration, extraction, rotary evaporation, sand making and column chromatography to obtain a finished product 2; slowly dripping thiophosgene into the third organic solvent solution of the finished product 2, fully reacting, extracting, performing rotary evaporation, making sand, and passing through a column to obtain a finished product 3; and dissolving 4-nitrobenzyl alcohol, the finished product 3 and NaH in a fourth organic solvent, reacting under an ice bath condition, and carrying out sand making, column passing and rotary evaporation to obtain the hydrogen sulfide donor. The hydrogen sulfide donor provided by the invention is helpful for promoting the clinical application of hydrogen sulfide therapy in the aspects of clinical application and research value.

The application discloses a composite titanium catalyst and a synthesis method and application thereof. The composite titanium catalyst is prepared by mixing and reacting a polyvinylpyrrolidone aqueous solution and a hydrochloric acid solution of butyl titanate. The high molecular weight polylactic acid is prepared by mixing lactic acid and the composite titanium catalyst solution, performing pre-polymerization, and then adding tin dichloride in a polycondensation stage. The composite catalyst system is composed of the composite titanium catalyst and the tin dichloride, the synthesis method has the advantages of simple preparation, easy operation and short catalytic polycondensation time, the prepared polylactic acid has high yield and large relative molecular mass, and is suitable for large-scale industrialized production of polylactic acid.

The invention relates to the field of heat-insulating glass preparation, in particular to a heat-insulating glass preparation method based on E-51 / ATO, which comprises the following steps: 1, pouring tin tetrachloride pentahydrate and antimony trichloride as precursors into a stainless steel high-pressure kettle with a para-polyphenol lining, and sealing to obtain an ATO dispersion solution; 2, the ATO dispersion solution is centrifuged and washed with ethyl alcohol and deionized water respectively, and dried nanometer ATO powder is obtained; 3, weighing E-51, an amine curing agent and acetone, uniformly mixing, pouring the nano ATO powder, and continuously stirring to obtain uniform ATO / E-51 slurry; and 4, fixing the pretreated glass substrate on a platform, injecting the ATO / E-51 slurry into a spray pen material cup, spraying the ATO / E-51 slurry on the surface of the glass substrate, and drying and curing a sprayed sample to obtain the ATO / E-51 heat-insulating glass with a compact surface structure. ATO nano-particles with the particle size of 10 nm are directly prepared through an optimized solvothermal method, and then agglomeration of the nano-particles is effectively prevented through an accurate mass ratio and high-speed stirring synergistic dispersion process.

The application relates to a low-temperature gas-sensitive material with an In2O3 layer grown on a ZnSnO3 surface and a preparation method thereof. The ZnSnO3 is an Archimedean solid particle, each triangular face around a multi-dimensional surface of the Archimedean solid particle is surrounded by three quadrilateral faces, each quadrilateral face shares a side with the triangular face, and In2O3 nanoparticles are uniformly grown on the multi-dimensional surface of the ZnSnO3 Archimedean solid particle to form a uniformly-distributed In2O3 particle composite layer. The method is as follows: zinc oxalate is dissolved in deionized water, tin chloride is added, sodium hydroxide particles are added, an indium nitrate solution is dropped, centrifugation is carried out after hydrothermal reaction, washing and drying are carried out, and finally calcination is carried out. The ZnSnO3 / In2O3 composite material has higher base resistance in air, high sensitivity to ethylene glycol gas and triethylamine gas, and low working temperature. The application has low preparation cost and good industrial application prospect.

The application belongs to the technical field of medical material preparation, and particularly relates to a composite material based on photodynamic therapy of periodontitis and a preparation method and application thereof. The method disperses sodium dodecyl benzene sulfonate, tin chloride pentahydrate and L-cysteine in a mixed solution of water and ethylene glycol, uniformly stirs, and obtains nanosheets through hydrothermal reaction; then the nanosheets are mixed with mercapto-polyethylene glycol through ultrasonic, to obtain tin disulfide nanosheets; a germanium oxide solution, a chromium nitrate nonahydrate solution, zinc nitrate hexahydrate, hydrated gallium nitrate and water are mixed, stirred in the dark, ammonia water is added and uniformly stirred, and then hydrothermal reaction is carried out, to obtain long-light-emitting nanoparticles; finally, the tin disulfide nanosheets and the long-light-emitting nanoparticles are dissolved in water, stirred in the dark, a methylene blue solution is added and continuously stirred in the dark, and the composite material based on photodynamic therapy of periodontitis is obtained. The composite material based on photodynamic therapy of periodontitis prepared by the method can effectively improve the curative effect of photodynamic therapy in the treatment of periodontitis.

This invention belongs to the field of antibacterial photodynamic therapy (PDPT), providing a microenvironment-responsive ROS-modulated antibacterial photodynamic therapy for periodontitis and its preparation method. It includes: preparing tin sulfide oxide using sodium dodecylbenzenesulfonate, tin chloride pentahydrate, and L-cysteine ​​as raw materials; preparing nanozymes using zinc nitrate, copper nitrate, urea, and thioacetamide as raw materials; and preparing antibacterial photodynamic therapy using indocyanine green, bacterial targeting peptides, nanozymes, tin sulfide oxide, and dihydromyricetin as raw materials. This invention constructs a microenvironment-responsive antibacterial photodynamic therapy targeting the infection and treatment characteristics of periodontitis. It proposes a strategy combining microenvironment-responsive programmed regulation of ROS in bacterial infection, precise and long-lasting treatment, and immune regulation to construct antibacterial photodynamic therapy, thereby improving and expanding the efficacy and application scenarios of antibacterial photodynamic therapy for periodontitis.

The invention belongs to the technical field of acrylic resin manufacturing, and discloses an acrylic resin composition with low VOC emission as well as a preparation method and application thereof. Acrylic acid and glycidyl tertiary carboxylic ester are pre-polymerized firstly, then a monomer mixture II is added for polymerization to prepare water-based acrylic resin, and acrylamide in the monomer mixture II reduces VOC emission in the acrylic resin composition through chemical adsorption; barium-doped modified zinc stannate is formed on the surface of graphene oxide through a hydrothermal reaction of sulfur-doped graphene oxide, zinc acetate dihydrate, tin chloride pentahydrate and barium chloride, the nano VOC inhibitor is prepared through high-temperature calcination, and electron transfer can be promoted through compounding of graphene and zinc stannate so as to improve the VOC catalytic degradation efficiency. The acrylic resin composition with low VOC emission prepared by the invention has excellent scratch resistance and low VOC emission performance.

The application discloses a kind of near-infrared long afterglow luminescent nano probes, its preparation method and application, belong to near-infrared long afterglow material field. With mesoporous silica as template, with zinc acetate, gallium nitrate, tin chloride, chromium acetate, chromium nitrate and yttrium nitrate as doped metal raw materials, long afterglow luminescent core is obtained by reaction and calcination;The outer layer of long afterglow luminescent core is coated with manganese dioxide, to obtain pre-product;Pre-product is surface modified, and coupling target molecule plerixafor, i.e. near-infrared long afterglow luminescent nano probe. The near-infrared long afterglow luminescent nano probe has good biological safety, can be effectively enriched in the tumor area in vivo after mouse tail vein injection, can realize high-sensitivity imaging of multiple small tumors in vivo under red light LED irradiation, and the imaging time is short, suitable for intraoperative imaging, can be used for the imaging of breast cancer tumor model to guide tumor resection.

The invention provides a preparation method and application of anatase conductive titanium dioxide, and relates to the technical field of titanium dioxide production. The preparation method comprises the following steps: S1, adding deionized water into an anatase titanium dioxide base material, and stirring to form a white suspension; adding a dispersing agent and a precipitating agent into the white suspension, and carrying out ultrasonic treatment to obtain a titanium dioxide suspension; s2, dropwise adding an ethanol solution of tin chloride and antimony chloride into the titanium dioxide suspension to form an adsorption layer on the surface of titanium dioxide, then adjusting the pH value to 1.5-2.5, then transferring into a reaction kettle, reacting at 180 DEG C for 4 hours, and after the reaction is finished, carrying out suction filtration and drying to obtain anatase conductive titanium dioxide; according to the preparation method provided by the invention, anatase titanium dioxide is subjected to coating modification through a hydrothermal method, high-temperature treatment is not needed, the resistivity of the obtained titanium dioxide is about 22 omega.cm, the chromatic value is about 90.25, the average particle size is about 0.258 mu m, the particle size is uniform, the titanium dioxide is easily dispersed in various media, the high-temperature heat resistance is good, and meanwhile, the requirements of light-color appearance, low hardness and good dispersity are met; and the material has the characteristics of excellent conductivity and good stability at high temperature, and can be widely applied to chemical fiber products.

The invention discloses a multi-metal multi-path recovery process, and belongs to the technical field of metal recovery. The method is used for solving the technical problem that in the prior art, the recovery rate and recovery purity of tin and antimony need to be further improved, and comprises the following steps that a tin-containing material and an antimony-containing material are pretreated and then mixed and smelted with a reducing agent, the obtained tin-antimony alloy is added into a hydrochloric acid solution, and a tin chloride solution and antimony oxychloride are obtained; then adding an adsorbent into the tin chloride solution for adsorption and desorption to obtain tin hydroxide, and dissolving antimony oxychloride and then replacing with iron powder to obtain the antimony simple substance. According to the method, the tin-antimony powder is firstly reduced by using the reducing agent and then is purified and recovered, so that the recovery rate and the purity of the recovered tin hydroxide and antimony are further improved.

The invention discloses a preparation method and application of a tin-based single / double-metal MOF (Metal Organic Framework) catalyst. The preparation method comprises the following steps: dissolving an organic ligand terephthalic acid and NaOH in a mixed solvent of DMF and deionized water to prepare an MOF precursor solution, dissolving tin dichloride and another metal salt in deionized water to prepare a metal salt precursor solution, and mixing the two precursor solutions to prepare the tin-based single / double-metal MOF catalyst. According to the application of the tin-based single / double-metal MOF catalyst for catalyzing fructose to prepare alpha-hydroxyl-gamma-butyrolactone, fructose is used as a substrate, 1, 4-dioxane is used as a solvent, the substrate, the solvent and the catalyst are mixed according to a certain ratio, and then the mixture is heated and stirred at 120-190 DEG C for C-C bond breakage and nucleophilic addition cascade reaction for 30-240 min to obtain the alpha-hydroxyl-gamma-butyrolactone. The tin-based single / double-metal MOF catalyst has the characteristics that the preparation of the catalyst is simple, the reaction conditions are green and mild, the raw materials are cheap and easy to obtain, and the yield of alpha-hydroxyl-gamma-butyrolactone is high, so that the tin-based single / double-metal MOF catalyst has a good industrial application prospect.

The application discloses a synthesis method of a lithium ion battery negative electrode material, and particularly relates to a synthesis method of C@MoSe2 / SnSe2@CNT(O) material based on oxygen-doped carbon nanotube CNT(O). The nanosheet loaded with MoSe2 and SnSe2 doped with each other on the surface of CNT(O) can relieve material volume expansion, provide more active sites, and thus obtain higher capacity and better long cycle stability. The application takes molybdenum pentachloride, dihydroxy butyl tin chloride, Se, CNT(O) and ethylene glycol as raw materials, and synthesizes C@MoSe2 / SnSe2@CNT(O) nanocomposite heterojunction material through ultrasonic dispersion and subsequent calcination method. Compared with similar products, the method has the advantages of simple steps, high safety, low cost, obvious nanosheet morphology characteristics of the prepared product, more active sites provided by the CNT(O) coated inside, high capacity, good cycle stability and obvious advantages under large current (30 Ag ‑1 of current density, capacity is kept at 667 mA h g ‑1 after 10000 times of long cycle), and is beneficial to realize the large-scale production.

The invention provides an acetone gas sensor based on bimetallic loaded nanoparticles and a preparation method thereof, and the preparation method comprises the following steps: adding tin chloride into a solution containing a complexing agent and deionized water, stirring at 60 DEG C for 10 minutes, then adding ammonia water until the pH value reaches 3, and centrifugally washing to obtain tin hydroxide precipitate powder; sequentially adding indium chloride tetrahydrate powder, gold chloride powder and platinum tetrachloride powder into the tin hydroxide precipitate powder for ball milling and mixing, and sintering at the temperature of 600 DEG C for 2 hours to obtain bimetallic loaded nanoparticles; the preparation method comprises the following steps: adding ethylene glycol and zirconium oxide ball-milling beads into bimetallic-loaded nanoparticles, carrying out ball milling for 8 hours to obtain a dispensing solution, coating a micromotor heating plate with the dispensing solution, drying at room temperature, and sintering at 200-400 DEG C for 3-4 hours to obtain the acetone gas sensor based on the bimetallic-loaded nanoparticles. Therefore, the excitation temperature can be effectively reduced, and the selectivity to acetone gas can be improved.

The invention discloses a preparation method and application of a Co2P / SnO2 composite material, and belongs to the technical field of semiconductor materials, the preparation method comprises the following steps: (1) dissolving cobalt acetate tetrahydrate, sodium hypophosphite and polyvinylpyrrolidone in deionized water, and stirring to form a transparent pink solution; (2) transferring the solution into a high-pressure reaction kettle, and then putting the high-pressure reaction kettle into a drying oven for reaction; (3) washing and drying the obtained product to obtain Co2P nano powder; (4) dissolving the Co2P nano powder and 2-methylimidazole in methanol together to obtain a solution A; dissolving tin chloride dihydrate in methanol to obtain a solution B; slowly pouring the solution A into the solution B, standing and aging; pouring out the supernate to obtain a Co2P / MOF precursor; and (5) putting the precursor into a muffle furnace, heating to 400 DEG C, calcining for 1 hour, cooling, and grinding to obtain the Co2P / SnO2 composite material. According to the invention, Co2P is introduced into a SnO2 system, and through the synergistic effect of interface chemical bonding and defect regulation, the electronic structure of SnO2 is optimized and the surface reaction energy barrier is reduced.

The invention provides a solvothermal method for synchronously preparing SnS2 and SnO2 and application, and belongs to the technical field of material synthesis. According to the method, stannic chloride and thiourea are used as raw materials, one-step preparation of the pure-phase SnS2 nano material and the pure-phase SnO2 nano material is achieved through a solvothermal method and accurate regulation and control of reaction conditions, the prepared material is high in phase purity and free of impurity phases, a complex separation or post-treatment process is not needed, the obvious advantage of process intensification is achieved, and the method is suitable for industrial production. The method has important significance in promoting large-scale application of SnS2 and SnO2 in the engineering practical fields of photocatalysis, semiconductor devices, machinery, aviation and the like; the pure-phase SnS2 nano material and the pure-phase SnO2 nano material prepared by the method can be independently used, and both the pure-phase SnS2 nano material and the pure-phase SnO2 nano material show a good effect of efficiently photodecomposing the rhodamine B dye by applying the pure-phase SnS2 nano material and the pure-phase SnO2 nano material to photocatalytic degradation of the rhodamine B dye respectively.