77 results about "Tin chloride" patented technology

The invention discloses a SnO2 modified WO3 nanosheet composite gas-sensitive material as well as a preparation method and application thereof, and belongs to the technical field of inorganic composite materials. The preparation method comprises the following steps: dissolving WCl6 in ethanol, adding into a reaction kettle provided with a ceramic tube, carrying out hydrothermal reaction at 170-190 DEG C for 5-8 hours, taking out the ceramic tube, drying, and annealing to obtain a ceramic tube loaded with WO3 nanosheets; the preparation method comprises the following steps: dissolving SnO2, tin chloride and urea in water to obtain a mixed solution, adding the mixed solution into a reaction kettle filled with a ceramic tube loaded with a WO3 nanosheet, carrying out a hydrothermal reaction at 90-100 DEG C for 1-4 hours, taking out the ceramic tube after the reaction is finished, and drying to obtain the SnO2 modified WO3 nanosheet composite gas sensitive material, and enabling the SnO2 modified WO3 nanosheet to grow on the ceramic tube in situ. The preparation method is simple, the product is high in crystallinity and good in stability and is suitable for preparing a gas sensitive sensor material with high economical efficiency, and a sensor prepared from the SnO2 modified WO3 nanosheet composite gas sensitive material can effectively improve the gas sensitive performance of WO3 and shows an extremely high response value to nitrogen dioxide at a low temperature.

The invention discloses a catalyst carrier and a preparation method and application thereof, and belongs to the technical field of catalyst carriers, the preparation method comprises the following steps: mixing alumina sol with a composite template agent, tin chloride and silica sol to obtain slurry; preparing carrier wet balls from the slurry, drying and roasting to obtain the catalyst carrier; the composite template agent comprises a surfactant and organic amine, the surfactant is a zwitterionic surfactant and a nonionic surfactant, and the organic amine is hexamethylenetetramine; the mass ratio of the surfactant to the organic amine is 1: (10-20); the mass ratio of the zwitterionic surfactant to the nonionic surfactant is 1: (1-2). According to the invention, the crushing strength reaches 71N / particle to 80N / particle, the specific surface area reaches 138 m < 2 > / g to 165 m < 2 > / g, the performance of the alumina catalytic carrier is greatly improved, and technical support is provided for long-term efficient and stable operation of a catalyst.

The present invention is a visible light responsive CO 2 The invention discloses a method for preparing a photocatalyst, which belongs to the field of photocatalytic reduction technology. The method comprises: step 1) preparing SnO from a tin chloride solution and a sodium hydroxide solution; 2 ‑NPs; Step 2) SnO 2 ‑NPs, 2‑methylimidazole solution, Zn(NO 3 ) 2 6H 2 T‑ZIF‑8@SnO was prepared from O solution. 2 The method of the present invention generates an interface effect between different components through a heterogeneous structure, thereby generating different catalytic reaction adsorption sites, thereby affecting the activity, selectivity and stability of the catalyst. 2 The powder size is uniform, the light response wavelength can reach 760nm, and it is sensitive to CH 4 The selectivity can reach 77%.

The invention discloses a preparation method of an alpha-Fe2O3 / SnO2 nanoneedle heterojunction gas sensitive material, and belongs to the technical field of preparation and application of inorganic composite materials. Adding a mixed solution of ferric chloride and sodium sulfate and the ceramic tube into a reaction kettle, carrying out hydrothermal reaction at 120-160 DEG C for 10-14 hours, taking out the ceramic tube after the reaction is finished, drying and annealing to obtain a ceramic tube loaded with alpha-Fe2O3 nanoneedles; dissolving tin chloride and urea in water to obtain a mixed solution, adding the mixed solution and the ceramic tube loaded with the alpha-Fe2O3 nanoneedle into a reaction kettle, carrying out hydrothermal reaction at 80-100 DEG C for 1-6 hours, taking out the ceramic tube after the reaction is finished, drying and annealing to obtain the alpha-Fe2O3 / SnO2 nanoneedle composite gas-sensitive material. The preparation method is simple, the product is high in crystallinity and good in stability and is suitable for preparing a high-economical gas sensitive sensor material, and a sensor prepared from the alpha-Fe2O3 / SnO2 nanoneedle heterojunction gas sensitive material can effectively improve the gas sensitive performance of alpha-Fe2O3 and shows an extremely high response value to NO2 while the working temperature is reduced.

The invention belongs to the technical field of high-entropy materials, and discloses high-entropy pyrochlore ceramic as well as a preparation method and application thereof. The chemical formula of the high-entropy pyrochlore ceramic is (La0. 2Nd0. 2Sm0. 2Gd0. 2Er0. 2) 2M2O7, M is Zr, Hf, Ti or Sn, lanthanum oxide, neodymium oxide, samarium oxide, gadolinium oxide, erbium oxide and zirconium oxide or hafnium oxide or titanium oxide or tin oxide are sintered at the temperature of 1400-1600 DEG C to synthesize high-entropy pyrochlore powder, the high-entropy pyrochlore powder is mixed with tin chloride, ball-milled and dried to obtain mixed powder, the mixed powder is mixed with a surfactant, the mixed powder is mixed at the temperature of 200-400 DEG C, ball-milled and dried, and the high-entropy pyrochlore ceramic is obtained. And carrying out cold sintering under the pressure of 200-500MPa, and then carrying out vacuum sintering at the temperature of 1300-1600 DEG C, thereby obtaining the The high-entropy pyrochlore ceramic disclosed by the invention is high in purity, high in density, excellent in mechanical property and leaching resistance, low in sintering temperature and short in heat preservation time, and has an application prospect in the field of nuclear waste curing.

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 discloses a high-entropy pyrochlore oxide fiber and a preparation method thereof.The preparation method comprises the following steps that 1, four rare earth nitrates are mixed and dissolved in an ethanol solution to obtain a solution A, anhydrous tin chloride is added into an acid solution to obtain a solution B, then the solution A and the solution B are mixed, a spinning auxiliary is added, the mixture is fully stirred and dissolved, and a spinning solution A is obtained; and finally obtaining a spinning precursor solution. 2, performing an electrostatic spinning process on the spinning precursor solution to obtain a high-entropy rare earth precursor fiber; and 3, calcining the high-entropy rare earth precursor fiber to obtain the stannate fiber with the high-entropy rare earth pyrochlore structure. The method is characterized in that a high entropy strategy is provided, and the stability of pyrochlore oxide is improved; the electrostatic spinning process is optimized, and the morphology uniformity problem of fiber preparation is solved; high-temperature calcination parameters are optimized, and the crystallinity and high-temperature resistance of the fiber are improved. Meanwhile, the high-entropy pyrochlore oxide fiber provided by the invention has designability and operability, the preparation process is simple, and the high-entropy pyrochlore oxide fiber plays an important role in the aspects of high-performance composite materials, catalyst carriers and the like.

The invention relates to the technical field of gas sensing, and discloses a preparation method of nano tin oxide, nano tin oxide, tin oxide ink, a gas sensor and a preparation method of the gas sensor. The preparation method of the nano tin oxide comprises the following steps: mixing tin chloride dehydrate and ethanolamine to obtain a precursor mixed solution; treating the precursor mixed solution to obtain a complex solution; adding propionic acid into the complex solution to obtain tin oxide precipitate; and carrying out sintering treatment on the tin oxide precipitate to obtain the nano tin oxide. Ethanolamine and propionic acid are added in the process of preparing the nano tin oxide by using a sol-gel method, so that the health and safety risks are avoided, the pH value stability is favorably controlled, the uniformity and consistency of the nano tin oxide are ensured, and the gas sensing performance can be improved when the nano tin oxide is applied to a gas sensor. According to the invention, a sol-gel method and an ink-jet printing technology are combined, so that the preparation process of the gas sensor is simplified.

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 invention discloses a silver-based tin oxide electrical contact material and a preparation method thereof, and relates to the technical field of electrical contact materials. When preparing the silver-based tin oxide electrical contact material, the invention first uses a high-temperature solid phase method to dope lithium and cerium to prepare doped tin oxide powder; tin chloride and copper nitrate are electrostatically spun to form a fiber film, and titanium dioxide is grown in situ by nano-spraying, and then calcined to form doped tin oxide fiber; doped tin oxide powder, doped tin oxide fiber and silver powder are mixed by high-energy ball milling and then annealed to obtain a silver-based tin oxide composite powder; the silver-based tin oxide composite powder is pre-pressed and then vacuum-discharged plasma sintered to obtain a silver-based tin oxide electrical contact material. The silver-based tin oxide electrical contact material prepared by the invention has the advantages of low resistivity, strong resistance to fusion welding, good resistance to arc erosion, and easy processing and shaping.

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.

The invention discloses a preparation method of a Ni-Sn bimetallic alloy catalyst and application of the Ni-Sn bimetallic alloy catalyst in furfural hydrogenation reaction. Nickel nitrate and tin chloride which are low in cost are used as raw materials, an oxyphilic metal Sn-doped Ni-Sn bimetallic catalyst is prepared by adopting a glycine-assisted spontaneous combustion method, and the introduction of the oxyphilic metal Sn not only promotes the adsorption and activation of the catalyst on furfural, but also facilitates the improvement of the selectivity of 2-methylfuran, and the selectivity of 2-methylfuran is improved. And the strong interaction between Ni and Sn promotes the formation of Ni-Sn alloy, thereby greatly enhancing the hydrogen dissociation capability and catalytic activity of the catalyst. The preparation method is simple, the production cost is low, the hydrogenation effect is considerable, the reaction is easy to control, and the catalyst is environment-friendly, does not cause secondary pollution to the environment and can be widely applied to various hydrogenation reactions.

The invention relates to a low-temperature gas-sensitive material with an In2O3 layer grown on the surface of ZnSnO3 and a preparation method thereof, ZnSnO3 is Archimedes particles, three quadrilateral surfaces are arranged around each triangular surface in the multi-dimensional surfaces of the Archimedes, each quadrilateral surface and the triangular surface share the same edge, In2O3 nanoparticles uniformly grow on the multi-dimensional surfaces of the ZnSnO3 Archimedes particles, and the In2O3 nanoparticles are uniformly distributed on the multi-dimensional surfaces of the ZnSnO3 Archimedes particles. And a uniformly distributed In2O3 particle composite layer is formed. The method comprises the following steps: dissolving zinc oxalate into deionized water, adding tin chloride, adding sodium hydroxide particles, dropwise adding an indium nitrate solution, carrying out a hydrothermal reaction, centrifuging, washing, drying, and finally calcining. The ZnSnO3 / In2O3 composite material is higher in base resistance in air, high in sensitivity to ethylene glycol gas and triethylamine gas and low in working temperature. The method is low in preparation cost and has a good industrial application prospect.

The present invention belongs to the field of solar energy technology and nanomaterial technology, and relates to a method for preparing SnO2 nanomaterial precursor acetylacetonate tin chloride (IV), and provides a preparation process of SnO2 nanoparticles, which are further applied in perovskite solar cells as electron transport layer materials. The present invention is based on the reaction of acetylacetonate and tetravalent tin salt to prepare acetylacetonate tin chloride, and acetylacetonate can be prepared by acetylacetone and alkali with lower cost, and the whole process has high reaction degree, short time, easy removal of impurities, high purity, and can meet the subsequent SnO2 synthesis needs. The acetylacetonate tin chloride (IV) synthesized by the method of the present invention costs 0.5 yuan per gram, and the commercially available acetylacetonate tin chloride (IV) is analytically pure and sold at a price of 132 yuan per gram. The method of the present invention can be produced at kilogram level, thereby realizing large-scale production, with lower cost, and can promote the development of solar photovoltaic industrialization.

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 invention relates to the technical field of photocatalytic materials, in particular to tin polyheptazinyl imide as well as a preparation method and application thereof. The preparation method of the tin polyheptazine imide comprises the following steps: carrying out thermal polymerization reaction on a carbon nitride precursor to obtain polymer carbon nitride; the preparation method comprises the following steps: carrying out thermal polymerization reaction on polymer carbon nitride under the condition that chloride fused salt is used as a fused salt template, and then acidifying by hydrochloric acid to obtain tin polyheptazinamide; wherein the chlorate molten salt comprises anhydrous tin dichloride molten salt. The tin polyheptazine imide prepared by the preparation method disclosed by the invention has high crystallinity and wide spectral response range, greatly widens the light absorption range of a photocatalytic material, is expected to realize efficient near-infrared light activity, and can utilize sunlight to the maximum extent, thereby obtaining high activity of photocatalytic decomposition of water to produce hydrogen.

Techniques disclosed herein relate to photo-patternable latent-chemistry inorganic materials. An example of the photo-patternable latent-chemistry inorganic materials includes a sol-gel material comprising a solution containing a tin dichloride salt, a solvent including at least one alcohol-containing solvent, and optionally a photo-acid generator or photo-acid. The sol-gel material, upon selective photo-excitation (which forms a latent pattern with latent chemistry in the sol-gel material) and blanket thermal annealing, can form a coating having a formula SnO(n)X(m), where the n:m ratio and n-m values of the coating vary across regions of the coating, such that a refractive index of the coating varies across regions of the coating, without affecting the coating's transparency for visible light.

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 Sn (II) catalyst and a preparation method and application thereof.The preparation method comprises the steps that S1, skeleton molecules and a solvent A are added into a reaction container, inert gas is introduced to remove air, the reaction container is placed in an ice bath to enable the temperature of the solution to be reduced to 0 DEG C, then n-butyllithium is added, stirring is conducted for 30 min at the temperature of 0 DEG C, then stirring is conducted for 30 min at the normal temperature, and a solution A is obtained; and S2, dissolving tin dichloride in a solvent B to obtain a solution B, adding the solution B into the solution A, stirring at normal temperature for 6-18 hours, then carrying out reduced pressure distillation to remove the solvent B, then adding a solvent C, extracting a target product from the solvent C, and then carrying out reduced pressure to remove the solvent C, thereby obtaining the Sn (II) catalyst. The Sn (II) catalyst can be used as a catalyst in a polyfluorinated aromatic hydrocarbon defluorination hydrogenation reaction or a nitro aromatic hydrocarbon reduction reaction. Compared with a traditional transition metal catalyst, the catalyst has the advantages of easily available raw materials and simple synthesis, and can replace the transition metal catalyst to participate in organic synthesis reaction.

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.