35 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 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 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.

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 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 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.

The application provides a zinc-bromine flow battery and a preparation method thereof, and relates to the technical field of zinc-bromine flow batteries.The SnO2-Fe / carbon felt positive electrode composite material with high catalytic activity is obtained by impregnating and calcining carbon felt by using a first precursor solution containing tin chloride, ferric nitrate and sodium citrate; the Cu / carbon felt negative electrode composite material with high zinc affinity is obtained by impregnating carbon felt by using a second precursor solution containing copper acetate and then performing contact reaction with ascorbic acid; and then the zinc-bromine flow battery is assembled and prepared. Through the SnO2-Fe / Cu dual-function composite electrode design, the problems of positive electrode reaction kinetics lag, bromine shuttling, negative electrode zinc dendrite extension and ion exchange membrane puncture of the zinc-bromine flow battery are effectively solved, and the effective optimization of the electrochemical performance, cycle life and cost benefit of the zinc-bromine flow battery is realized in cooperation.

This invention discloses a method for preparing nano-sized ammoniated aramid by nitration followed by reduction in mixed acid, belonging to the fields of chemistry and materials technology. This invention uses waste aramid as raw material, utilizing the nitryl ions in mixed acid to convert aramid into nitrated aramid; then, using a relatively inexpensive tin dichloride catalyst under mild conditions, the nitro groups on the nitrated aramid are reduced to amino groups, successfully preparing ammoniated aramid. The method for preparing nano-sized ammoniated aramid by nitration followed by reduction in mixed acid has the following advantages: (1) simple operation, low cost, and conducive to industrial production; (2) low reaction temperature, mild experimental conditions, and sustainability; (3) fast reaction and short cycle; (4) convenient product collection, facilitating subsequent use.

The present application belongs to the technical field of energy recovery, and particularly relates to a waste gas treatment device for methyl tin chloride production. The present application provides a waste gas treatment device for methyl tin chloride production, which comprises: a condenser for condensing and recovering organic matter; an absorption tower, wherein a plurality of tower plates are provided in the tower body at equal intervals, and the tower plates are provided with a plurality of filter holes; a catalytic furnace for heating and catalyzing the recovery of organic matter; the condenser, the absorption tower and the catalytic furnace are connected in sequence; a plate heat exchanger, one end of the plate heat exchanger is communicated with the condenser, and the other end is communicated with the gas outlet pipe of the absorption tower; and further comprising a sliding rod, a cylinder body and a piston plate, the tower plate is provided with a transverse groove, the sliding rod is in sliding and sealing connection with the transverse groove, the sliding rod is provided with a plurality of through holes, the through holes are matched with the filter holes, the cylinder body is arranged in the tower plate, the piston plate is in sliding and sealing connection with the cylinder body, and the piston plate is fixedly connected with the sliding rod. The present application solves the problem that the device cannot be operated for a long time due to the blockage of the filter holes of the tower plate.

The invention belongs to the technical field of medical material preparation, and particularly relates to a photodynamic-based composite material for treating periodontitis and a preparation method and application of the photodynamic-based composite material. The method comprises the following steps: dispersing sodium dodecyl benzene sulfonate, tin chloride pentahydrate and L-cysteine into a mixed solution of water and ethylene glycol, uniformly stirring, and carrying out hydrothermal reaction to obtain nanosheets; then mixing with sulfydryl-polyethylene glycol, and carrying out ultrasonic treatment to obtain tin disulfide nanosheets; the preparation method comprises the following steps: mixing a germanium oxide solution, a chromium nitrate nonahydrate solution, zinc nitrate hexahydrate, gallium nitrate hydrate and water, stirring in a dark place, adding ammonia water, continuously stirring uniformly, and carrying out a hydrothermal reaction to obtain long-luminescent nanoparticles; and finally, dissolving the tin disulfide nanosheets and the long luminous nanoparticles in water, stirring in a dark place, adding a methylene blue solution, and continuously stirring in a dark place, thereby obtaining the long luminous nano-particles. The composite material for treating periodontitis based on photodynamic therapy prepared by the invention can effectively improve the curative effect of the photodynamic therapy in periodontitis treatment.

The invention discloses a high-selectivity electrochemical preparation method of chlorohydrin, and belongs to the technical field of electrochemical catalysis. The method comprises the following steps: dissolving ruthenium chloride, tin chloride and niobium chloride in a solvent, adding hydrochloric acid and a processing aid, and carrying out a heating reaction to obtain metal sol; coating the metal sol on the surface of the titanium felt, drying and annealing to obtain the ruthenium-tin-niobium composite oxide loaded titanium-based electrode; taking a titanium-based electrode loaded with ruthenium-tin-niobium composite oxide as an anode, taking platinum as a counter electrode, taking Ag / AgCl as a reference electrode, and carrying out electro-catalytic reaction in an electrolyte to generate chlorohydrin; and the electrolyte contains sodium chloride and an olefin substrate. The method provided by the invention solves the problems of use of high-risk chlorine, poor reaction selectivity, high energy consumption, environmental pollution and the like in the traditional olefin chlorohydrination reaction, and has a wide application prospect.

The application belongs to the technical field of membranes, and relates to a preparation method of an acid and alkali resistant anion exchange membrane with high anion flux, comprising the following steps: dissolving polysulfone in an organic solvent, adding polyformaldehyde and trimethylchlorosilane, fully mixing and sealing and stirring for 1-120 min, then adding tin chloride drop by drop, fully mixing and sealing and stirring, reacting for 1-10 d at 10-50 DEG C, pouring into an alcohol solvent, and obtaining chlorinated polysulfone material; dissolving the chlorinated polysulfone material in N,N-dimethylformamide, adding 1,4-diazido bicyclo[2,2,2]octane, fully mixing and sealing and stirring, reacting, ultrasonic defoaming, obtaining a casting solution, scraping into a film, vacuum drying, and obtaining the anion exchange membrane. The preparation process is simple and easy to operate, and the prepared anion exchange membrane has good acid and alkali resistance, high ion flux and impact mechanical properties.

The invention discloses a supported metallocene catalyst for ethylene polymerization and application of the supported metallocene catalyst. The supported metallocene catalyst comprises an alkyl tin chloride / methylaluminoxane / silica gel carrier and a metallocene compound supported on the carrier; the alkyl tin chloride / methylaluminoxane / silica gel carrier is a silica gel carrier modified by alkyl tin chloride and methylaluminoxane. Alkyl tin chloride is used for modifying a silica gel carrier, the compound can react with hydroxyl, and a large amount of hydroxyl is eliminated; and the metallocene can be combined with MAO, so that certain space barrier exists between the MAO and the surface of the silica gel, the crowding effect is weakened, the loading capacity is improved, and metallocene combination sites are increased.

The invention discloses a preparation method of a supported metallocene catalyst for ethylene polymerization. The preparation method comprises the following steps: carrying out thermal activation treatment on a silica gel carrier; modifying the thermally activated silica gel carrier by using alkyl tin chloride to obtain an alkyl tin chloride / silica gel carrier; modifying the alkyl tin chloride / silica gel carrier by using methylaluminoxane to obtain an alkyl tin chloride / methylaluminoxane / silica gel carrier; and then loading a metallocene compound to obtain the loaded metallocene catalyst. Alkyl tin chloride is used for modifying a silica gel carrier, the compound can react with hydroxyl, and a large amount of hydroxyl is eliminated; and the metallocene can be combined with MAO, so that certain space barrier exists between the MAO and the surface of the silica gel, the crowding effect is weakened, the loading capacity is improved, and metallocene combination sites are increased.

The invention discloses a preparation method of a Pt-based propane dehydrogenation catalyst, which mainly comprises the following steps: carrying out reaction on organic magnesium, organic aluminum and tin chloride to form a magnesium-aluminum-tin ternary hydrotalcite interlayer carrier, and then carrying out granulation forming, roasting, acid steam high-temperature pore broadening, pore channel dredging and the like. The propane dehydrogenation catalyst prepared by the method is more uniform in active component dispersion, has larger mesoporous specific surface and total specific surface, and also has better abrasive resistance; the problems that a platinum-based propane dehydrogenation catalyst is easy to sinter and inactivate at high temperature and the atom utilization rate of noble metal is low can be obviously improved.