125 results about "Tetrachloride" patented technology

The invention relates to a preparation method of a pectin-derived carbon-coated amorphous tin-zinc composite oxide lithium ion battery negative electrode material. The method comprises the following steps: dropwise adding a tin tetrachloride solution and an acidified zinc oxide solution into a pectin solution to obtain a metal ion-pectin dispersion liquid; adding ammonia water to obtain a pectin precursor solution; freezing and solidifying with liquid nitrogen; and after freeze-drying, roasting for 3-5 hours to obtain the pectin derived carbon coated amorphous tin-zinc composite oxide lithium ion battery negative electrode material. The reversible specific capacity of the obtained composite material reaches 1339 mA h g <-1 > after 100 cycles under the current density of 0.2 A g <-1 >.

This application relates to the field of metal surface treatment materials, specifically disclosing a silicon-integrated inorganic supercrystalline thermal energy powder and its preparation and application methods. The silicon-integrated inorganic supercrystalline thermal energy powder comprises raw material A and raw material B. Raw material A includes the following: magnesium oxide, sodium fluoroaluminate, sodium polyphosphate, zinc oxide, crystalline tin tetrachloride, silicon dioxide, and boric acid. Raw material B includes the following raw materials in parts by weight: spodumene, lithium carbonate, titanium dioxide, zinc silicate, sodium carbonate, antimony trioxide, albite, fluorite, boric acid, sodium hydroxide, and yttrium oxide. The inorganic supercrystalline thermal energy powder of this application has advantages such as corrosion resistance and oxidation resistance, good thermal stability, no damage from thermal cycling, high hardness, wear resistance and high temperature resistance, energy saving, water scale reduction, and the ability to replace organosilicon high-temperature resistant special coatings, baking paints, enamel paints, and ceramic floor glazes.

The present invention discloses a method for separating nickel and iron from a nickel-iron alloy by chlorination roasting: (1) placing the nickel-iron alloy in a roasting furnace; (2) introducing a gaseous chlorinating agent into the roasting furnace for staged roasting to obtain roasting slag and a roasting gas phase; wherein the gaseous chlorinating agent is a mixture of chlorine and gaseous ferric chloride; and (3) condensing the roasting gas phase obtained in step (2) in stages to obtain solid ferric chloride and liquid silicon tetrachloride, respectively. The present invention controls the composition of the chlorinating agent during the chlorination roasting process to achieve selective and directional volatilization of iron into the gas phase while preventing nickel from being chlorinated. Thus, nickel and iron in the nickel-iron alloy can be separated in a single step, and the process flow is short.

This invention discloses a method for preparing a high-temperature resistant, strongly basic anion exchange resin, belonging to the field of ion exchange resins. The method includes three steps: First, white spheres with a crosslinking degree of 6-10 undergo a chloromethylation reaction by sequentially adding zinc dichloride and tin tetrachloride to improve the uniformity of the chloromethyl group distribution in the chlorospheres; second, the chlorospheres undergo an etherification reaction using tetrabutylammonium bromide as a phase transfer catalyst, and the dropping rate of sodium methoxide solution is controlled to improve the etherification conversion rate; finally, the etherification product undergoes a quaternization reaction with a trimethylamine aqueous solution to obtain the strongly basic anion exchange resin. This invention, by selecting the degree of crosslinking and optimizing the catalyst addition method for chloromethylation and the sodium methoxide dropping rate for the etherification reaction, results in a more uniform distribution of quaternary ammonium groups in the resin, significantly improving the ion exchange capacity and high-temperature resistance of the resin.

The invention discloses a negative electrode electrolyte and an acidic tin-bromine flow battery, and belongs to the technical field of energy storage. The negative electrode electrolyte provided by the invention comprises an active substance and a supporting electrolyte, the active substance comprises tetravalent tin salt; the tetravalent tin salt is selected from at least one of tin tetrachloride, tin sulfate, tin bromide and stannate; the supporting electrolyte is selected from at least one of sulfuric acid, hydrochloric acid, perchloric acid, methanesulfonic acid, hydrobromic acid and hydriodic acid. According to the acidic tin-bromine flow battery provided by the invention, a proper tin ion ligand is selected in the negative electrode electrolyte, and the formed tin-based complex can effectively improve the redox kinetics of Sn < 4 + > / Sn < 2 + > and improve the efficiency of the tin-bromine flow battery. Besides, the modification of the negative electrode can further improve the adsorption of reactive active substances and improve the electron transfer rate, and the high specific surface area can provide more active sites, so that the reaction polarization is reduced and the battery performance is improved.

The application relates to the technical field of metal organic thin layer material preparation, in particular to a kilogram-level preparation method of metal organic thin layer material. The preparation method comprises the following steps: S1, adding zirconium tetrachloride and H2BPYDC into a polytetrafluoroethylene reaction kettle, dissolving the zirconium tetrachloride and the H2BPYDC, and then adding a composite; S2, sequentially adding a DMF solution of palladium fluoroacetate, a catalyst and concentrated hydrochloric acid into the reaction kettle; S3, transferring the reaction kettle into an oven, centrifuging to obtain a cyan suspension after 18-20 hours, dispersing the cyan suspension in a DMF solution in batches at 60 DEG C, placing for 5-6 hours, removing unreacted substrates, and obtaining a solid; S4, cleaning the solid obtained in S3 by using DMF and tetrahydrofuran respectively, and vacuum drying for 12 hours to obtain the metal organic thin layer material. The kilogram-level preparation method of metal organic thin layer material is provided, so as to solve the problems of low preparation yield, slow rate and difficulty in kilogram-level preparation of metal organic thin layer material in the related art.

The invention discloses an air cathode Sn-CoSb / NC of a zinc-air battery and a preparation method of the air cathode Sn-CoSb / NC. The preparation method comprises the following steps: preparing a cobalt-doped ZIF-8 (Co-ZIF-8) precursor: mixing a methanol solution of dimethylimidazole with a methanol solution of zinc nitrate hexahydrate and cobalt nitrate hexahydrate, stirring at room temperature for 24 hours, centrifuging, washing and drying to obtain the Co-ZIF-8 precursor; the preparation method comprises the following steps: taking a small amount of N, N-dimethylformamide (DMF), adding tin tetrachloride pentahydrate and antimony trichloride, and stirring until the tin tetrachloride pentahydrate and the antimony trichloride are completely dissolved; then adding Co-ZIF-8 powder into the solution, stirring for 5 hours at room temperature, and then centrifuging and drying to obtain purple powder; and placing the powder in a tubular furnace, and carrying out high-temperature pyrolysis in an inert atmosphere to obtain the Sn-CoSb / NC electrocatalyst. The novel catalyst has excellent ORR functional activity, and as an air cathode of a zinc-air battery, high power density and excellent charge-discharge cycle stability are realized.

The invention relates to the field of electrocatalysts, in particular to a Ru t-ZrO2 / C electrocatalyst and a preparation method thereof.The preparation method includes the steps that zirconium tetrachloride, terephthalic acid, N, N-dimethylformamide and formic acid are put into a polytetrafluoroethylene lining to be subjected to a solvothermal reaction, and after the temperature is cooled to the room temperature, centrifugal washing and vacuum drying are conducted through DMF and methyl alcohol to obtain UiO-66 powder; secondly, dispersing the UiO-66 powder in methanol, adding ruthenium trichloride, stirring, centrifugally washing with methanol, and drying in vacuum to obtain a precursor Ru-UiO-66; and finally, sintering the precursor Ru (at) UiO-66 in a tubular furnace under an argon condition to obtain the Ru (at) t-ZrO2 / C electrocatalyst. According to the present invention, the strong interaction between the Zr-Ru bimetallic sites is combined with the strong conductive structure formed by ZrO2 and the carbon substrate, such that the prepared electrocatalyst has characteristics of low loading amount of the noble metal Ru cluster, excellent structure stability, high active site utilization rate, and efficient electron transfer with the MOFs carrier so as to show the efficient acid-base system electrocatalytic property;

The present invention discloses a production process of zirconium oxychloride and zirconium oxychloride. The process comprises the following steps: 1) Using zirconium tetrachloride as a raw material, preparing a first zirconium oxychloride solution; 2) Using high-purity zirconium oxychloride as a raw material, preparing a second zirconium oxychloride solution; 3) Simultaneously starting natural cooling for the first zirconium oxychloride solution and the second zirconium oxychloride solution. After the second zirconium oxychloride solution starts to crystallize, adding a preset mass of the second zirconium oxychloride solution to the first zirconium oxychloride solution to obtain a mixed solution; 4) Naturally cooling the mixed solution, and after crystallization, obtaining zirconium oxychloride crystals. The process of the present invention starts from a zirconium oxychloride solution, controls the crystallization process, reduces the impurity content in zirconium oxychloride, and improves the quality of zirconium oxychloride. The zirconium oxychloride of the present invention controls the crystallization process during crystallization, obtains crystals with higher purity, reduces the number of crystallization times, thereby achieving the improvement of the quality of zirconium oxychloride products and indirectly reducing the production cost of enterprises.

Based on the characteristic that tin tetrachloride is easy to hydrolyze, efficient extraction of tin in the tellurium-deposited liquid is achieved through a two-step method of neutralization impurity removal and hydrolysis tin deposition, the pH value is adjusted firstly, stirring impurity removal is conducted, then heating hydrolysis tin deposition is conducted, the direct recovery rate of tin is 95% or above, the tin content of a product is also as high as 40% or above, and the method is suitable for industrial production. The lead content is lower than 0.5%, the chlorine content is lower than 2%, compared with an existing conventional neutralization precipitation method, the alkali liquor used in the method is little, and the impurity rate in the obtained tin material is low.

Tin tetrachloride pentahydrate, zinc nitrate hexahydrate and dimethylimidazole are used as raw materials, methanol is used as a solvent, and the tin-zinc bimetallic oxide, which is named Sn-Zn-O for short, is obtained through stirring, centrifugal drying and calcining; the material is an n-type semiconductor, and the chemical composition of the material is SnO2 and ZnO. The microstructure of Sn-Zn-O is a nano microsphere, and the particle size range of the Sn-Zn-O is 100-250 nm. The invention relates to a preparation method of a hydrogen sensor based on Sn-Zn-O, namely when the Sn-Zn-O is used as the hydrogen sensor, the optimal working temperature is 180 DEG C, the response value is 112 when the hydrogen concentration is 1000 ppm, the response time is 1.29 s, and the recovery time is 147 s. When the hydrogen concentration range is 0.1-2000ppm, the hydrogen sensor has different responses to hydrogen with different concentrations, and the lowest hydrogen concentration is detected to be 0.1 ppm.

The application discloses a kind of photocatalyst and preparation method thereof, the photocatalyst is flower ball layer structure, composition includes SnS2, SnS, the molar ratio of SnS2 With SnS is 1-2.5:1.The preparation method of the photocatalyst, including the following steps: (1) tin tetrachloride pentahydrate, sulfur source is placed in first liquid, carries out first hydrothermal reaction, obtains SnS2;(2) to SnS2 Adding stannous chloride dihydrate and sulfur source, carries out second hydrothermal reaction, washes, obtains SnS2@SnS photocatalyst and dries.This application provides photocatalyst, can achieve the effect of excellent reduction performance.

The application provides a preparation method of high-purity sponge zirconium and relates to the field of sponge zirconium preparation. The preparation method comprises the following steps: zircon sand is mixed with coke, petroleum coke, needle coke and pitch coke respectively, and then is loaded into a chlorination furnace in a layered manner from bottom to top; high-temperature chlorine gas is introduced into the bottom of the chlorination furnace to perform a chlorination reaction, so that first crude zirconium tetrachloride gas is obtained; a reduced nickel-based catalyst is added into each loading layer of the chlorination furnace; first cooling is performed to obtain crude zirconium tetrachloride solid, first heating is performed to obtain second crude zirconium tetrachloride gas, purification is performed to obtain refined zirconium tetrachloride gas, and second cooling is performed to obtain refined zirconium tetrachloride solid; second heating is performed on the refined zirconium tetrachloride solid to obtain high-purity zirconium tetrachloride gas; the high-purity zirconium tetrachloride gas is introduced into a reduction furnace containing molten magnesium metal to perform a reduction reaction, so that a mixed product is obtained; and the mixed product is subjected to reduced-pressure distillation to obtain the high-purity sponge zirconium. The preparation method provided in the application has high purity of the obtained sponge zirconium.

A gas detection fuse comprising a thin strip or sheet of a conductive material, such as a metal, connecting two electrodes for detecting a gas of interest. The metal is selected to be reactive with the gas of interest, and has a relatively large surface area, such that when the gas of interest contacts the metal, the electrical connection between the electrodes is broken (e.g., due to the metal losing physical integrity, or becoming non-conductive, as a result of the reaction with the gas). The gas of interest may be chlorine, and the conducting material may be tin. When the tin is exposed to chlorine the tin becomes oxidized to produce liquid tin tetrachloride, thus breaking the electrical connection.

The invention relates to a process for preparing a star copolymer of 1,3-diene and ethylene, the copolymer containing more than 50 mole percent ethylene units. The process comprises the polymerization of a monomeric mixture of 1,3-diene and ethylene in the presence of a catalytic system based on at least one neodymocene borohydride metallocene and an organomagnesium cocatalyst, followed by the reaction of tin tetrachloride with the polymerization reaction product, and then a chain-terminating reaction. The invention also relates to a star copolymer obtainable by the process according to the invention.

The present invention discloses a solvothermal method for synthesizing SnO2 nanoparticles in one step. The method comprises adding acetylacetone to isopropyl alcohol as a mixed solvent, adding tin tetrachloride, stirring thoroughly, reacting in a reactor at 180-220°C for 12-24 hours, naturally cooling, separating, washing, and drying to obtain SnO2 nanoparticles. The preparation method of the present invention has the advantages of mild reaction conditions and a simple and easy method. The SnO2 nanoparticles synthesized by the method have broad application prospects in fields such as perovskite solar cells, photocatalysis, and gas sensing.

The invention discloses a process for producing titanium-zirconium-hafnium series metal through continuous reduction, which comprises the following steps: in an inert atmosphere, heating a reactor to a reaction temperature, adding metal magnesium, and then continuously adding tetrachloride at a constant high speed to carry out reduction reaction. In the reaction process, magnesium chloride melt is continuously or intermittently discharged, and metal magnesium is supplemented to maintain the reaction; meanwhile, the generated sponge titanium is continuously moved out and conveyed to a collector through a conveying device directly communicated with the reactor. The whole process of feeding, reacting, discharging and product moving-out is continuous, a traditional sequencing batch production mode is subverted, the titanium tetrachloride feeding speed can be stably kept at a high level (for example, the titanium tetrachloride feeding speed is larger than or equal to 1600 kg / h), the production efficiency is remarkably improved compared with a traditional process, meanwhile, stability and excellent product quality are guaranteed, the automation degree is high, and the production cost is low. And centralized recycling of reaction waste heat can be realized.

The invention discloses a preparation method of a 3D graphene-loaded tin oxide composite material. The preparation method comprises the following steps: preparing a precursor solution from graphene oxide, tin tetrachloride pentahydrate and ascorbic acid; dropwise adding a lauryl sodium sulfate solution into the precursor solution, and fully mixing to obtain a mixed solution; transferring the mixed solution into a glass bottle, and sealing and heating to promote the self-loading process of the solution; performing freeze thawing / 80 DEG C thermal reduction treatment on the preformed sample to form a preliminary composite material of tin oxide and graphene; repeatedly washing the sample subjected to thermal reduction by using ethanol to remove residual impurities, and then carrying out drying treatment; and carrying out annealing heat treatment on the dried sample in a nitrogen atmosphere to obtain the 3D graphene-loaded tin oxide composite material. The preparation method of the 3D graphene loaded tin oxide composite material provided by the invention is simpler in preparation process, lower in cost and suitable for large-scale industrial production.

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 application discloses a preparation method and application of a catalyst for cracking 1,2-dichloroethane to produce vinyl chloride, and comprises the following steps: 1) a neodymium ore is leached with hydrochloric acid, and after filtering a leaching solution, potassium chloride is added to form a doped precursor K2[NdCl3]; 2) an active metal oxide is dissolved in hydrochloric acid, and then added into the doped precursor K2[NdCl3] solution, and co-precipitation is carried out by adding alkali to obtain an emulsion of a doped active component; the active metal oxide is at least one of oxides of vanadium, manganese, titanium and scandium; 3) the emulsion of the doped active component is mixed with a liquid carrier to obtain the catalyst; the liquid carrier is one or more of chloroform, carbon tetrachloride, 1,1,2-trichloroethane and chlorobenzene.

A method for preparing a SnO2 hollow sphere / NiO cross-linked nanosheet composite-based gas sensor with high sensitivity for detecting triethylamine gas belongs to the field of thermoelectric materials technology. This invention aims to solve the problem of poor selectivity of SnO2 for triethylamine in existing methods. The method includes: 1. Injecting anhydrous tin tetrachloride liquid into anhydrous ethanol, followed by the sequential addition of distilled water and concentrated hydrochloric acid; 2. Preparing SnO2 hollow nanosphere powder; 3. Preparing a dispersion of SnO2 hollow nanospheres; 4. Preparing a nickel acetate solution; 5. Adding ammonia water to the nickel acetate solution; 6. Preparing SnO2 hollow nanosphere powder with Ni(OH)2 cross-linked nanosheets grown on its surface; 7. Preparing SnO2 hollow nanosphere powder with NiO cross-linked nanosheets grown on its surface; 8. Preparing the gas sensor. This invention is used for preparing a SnO2 hollow sphere / NiO cross-linked nanosheet composite-based gas sensor with high sensitivity for detecting triethylamine gas.

The invention provides a process method for improving the brightness of an amorphous Ni-Sn-P coating. The process method comprises the following steps: (1) preparing a plating solution: sequentially mixing nickel sulfate hexahydrate, trisodium citrate dehydrate, sodium potassium tartrate tetrahydrate, succinic acid, lauryl sodium sulfate, ammonium acetate, sodium hypophosphite and tin tetrachloride pentahydrate, adding water, and uniformly stirring to obtain the plating solution; and (2) activation before chemical plating is started, specifically, before chemical plating, a to-be-plated metal substrate is subjected to electric activation treatment in advance, the substrate serves as a cathode, a Ni sheet serves as an anode, the cathode and the anode are placed in a chemical plating solution in parallel, energization activation is conducted, chemical plating is conducted after electric activation, and the bright amorphous Ni-Sn-P plating layer is obtained. The bright amorphous Ni-Sn-P plating layer is composed of the following components in atomic percent: 55%-90% of Ni, 5%-20% of Sn and 5%-25% of P, the thickness is 1-50 microns, and the highest brightness can reach 490 Gu.

The utility model discloses a device for purifying crude zirconium tetrachloride, which comprises a tank body, the top of the tank body is fixedly connected with a tank cover through a bolt, the top of the tank cover is communicated with a zirconium tetrachloride exhaust pipeline, the lower part of one side of the tank body is communicated with an argon pipeline, and one side, far away from the argon pipeline, of the tank body is communicated with a hydrogen pipeline. The utility model relates to the technical field of zirconium tetrachloride purification, in particular to a device for purifying crude zirconium tetrachloride, which can be used for treating waste gas generated during purification through the matching of a tank body, a tank cover and a treatment device, and can be used for carrying out auxiliary heating and heat preservation on the tank body by utilizing waste heat of the waste gas because the temperature of the waste gas is higher when the waste gas is exhausted. The heat in the tank body is prevented from being directly and rapidly dissipated through the tank body, so that the energy-saving performance is improved, and external treatment equipment is not needed for waste gas treatment, so that the input of the equipment can be reduced, and the investment of economic cost is reduced.

The invention discloses a method for deeply separating tungsten from a sodium molybdate solution. The method comprises the following steps: heating an alkaline solution in a water bath, slowly adding tin tetrachloride into the alkaline solution, stirring, reacting, stopping, and carrying out solid-liquid separation to obtain filter residues and filtrate; and adding the obtained filter residues into a sodium molybdate solution, stirring and reacting, and carrying out solid-liquid separation to obtain tungsten-removed residues and tungsten-removed liquid. According to the method, the tin-containing compound is used as an adsorbent to selectively adsorb tungsten in the sodium molybdate solution, deep separation of tungsten is achieved, the concentration of residual WO3 in the solution does not exceed 2 ppm, and the loss amount of molybdenum is very small and does not exceed 0.5% generally. The method is very high in adaptability to feed liquid, and can be used for treating the sodium molybdate solution with the WO3 content as high as 10g / L. The method is short in process, simple to operate, small in molybdenum loss and easy to realize industrial production.

The invention belongs to the field of catalysts, and particularly relates to a tin tungsten phosphate solid acid catalyst, and the tin tungsten phosphate solid acid catalyst is used for catalyzing the reaction of 2, 5-dimethylfuran and ethanol to prepare p-xylene. The tin tungsten phosphate solid acid catalyst is synthesized by ammonium metatungstate, tin tetrachloride, polyether P123 and phosphoric acid through a one-pot hydrothermal method, and the catalyst can catalyze 2, 5-dimethylfuran to react with ethanol to prepare p-xylene by optimizing the tungsten-tin ratio, the temperature, the reaction time and the like. According to the catalyst disclosed by the invention, the route of preparing p-xylene by using ethanol as an alkene donor instead of a conventional fossil-sourced ethylene is realized, a relatively high yield is obtained, and a new thought and a new method are provided for green production of p-xylene.

The invention discloses a transparent ceramic target material for heat dissipation of a vehicle-mounted OLED (Organic Light Emitting Diode) and a preparation method of the transparent ceramic target material, and belongs to the technical field of ceramic target materials. The preparation method comprises the following steps: firstly, enabling aluminum powder to generate AIN nano powder under the action of nitrogen, then dispersing the AIN nano powder into a solvent, sequentially adding gallium nitrate, zinc nitrate and acetylacetone, and treating after reaction to obtain AlN-coated GZO nano powder; gallium nitrate and zinc nitrate are dispersed in a solvent, a complexing agent and magnesium nitrate hexahydrate are added for dispersion, polyethylene glycol is added for a reaction, GZO-MgO composite sol is obtained, AlN-coated GZO nanopowder and the GZO-MgO composite sol are mixed, yttrium nitrate, tin tetrachloride, a binder and an ammonium polyacrylate aqueous solution are added, the mixture is stirred uniformly, and the GZO-MgO nanopowder is obtained. After the pH value is adjusted, ball milling, degassing treatment and sintering are conducted, and the transparent ceramic target material for vehicle-mounted OLED heat dissipation is obtained. The ceramic target material provided by the invention has the characteristics of high light transmittance, high electric conductivity and high heat conductivity, and can effectively prolong the service life of an OLED device.

The application discloses a kind of carbon five petroleum resin for improving paint leveling and preparation method thereof, and specifically relates to petroleum resin technical field.The method comprises the following steps: refining carbon five petroleum resin, mixed with organic solvent under nitrogen protection and heated to carry out thermal polymerization;After cooling, polar modified monomer and composite catalyst are added, and catalytic polymerization and grafting reaction are carried out;Add alkaline terminator to terminate the reaction, and the finished product is obtained after washing, solvent removal and granulation.The composite catalyst is prepared by loading tin tetrachloride-phosphorus tributyl ester complex on activated clay.The application solves the problems of poor leveling, poor weather resistance, halogen residue and other problems of traditional resin through raw material refining, step-by-step polymerization and synergistic effect of polarity grafting.The obtained resin can significantly improve the leveling of paint, improve the gloss and weather resistance of coating film, has good compatibility and high stability, is suitable for various coating systems, and the process is environmentally friendly and easy to industrialize.

The invention discloses a carboxyl-functionalized metal organic framework material and preparation and application thereof in treatment of thorium-containing wastewater, and the method comprises the following steps: adding MIL-101-Cl and amino acid into an organic solvent, carrying out ultrasonic dispersion, adding triethylamine, and stirring; reacting at 100 DEG C, centrifuging, washing, and carrying out vacuum drying at 50-70 DEG C; the MIL-101-Cl is prepared by carrying out a reaction on MIL-101 powder, paraformaldehyde, tin tetrachloride and trimethylchlorosilane in anhydrous dichloromethane. The problems that in the prior art, the structure is disordered, stability is poor, selectivity is lost, and industrialization is difficult are solved. According to the invention, a carboxyl donor is grafted on the surface of chloromethylated MIL-101, and meanwhile, the increase of the carboxyl content obviously enhances the adsorption capacity of the material; due to the increase of the carboxyl density, the MIL-101-2COOH has more excellent Th (IV) adsorption selectivity and chemical stability.

The present invention belongs to the technical field of friction nanogenerators, and specifically relates to a friction nanogenerator based on tin tetrachloride / modified polyvinyl alcohol film, a preparation method and an application thereof. The nanogenerator is composed of a contact separation mode part and a lateral sliding mode part, with SnCl4-modified PVA film and a PTFE spray-coated film on a metal mesh substrate as a power generation layer. The contact separation mode part and the lateral sliding mode part work together to convert mechanical energy in the environment into electrical energy. The nanogenerator is applied to a friction power generation motion detection system, and the friction power generation motion detection system can be used to detect motion characteristics at different joints of the human body. The friction power generation motion detection sensor proposed by the present invention has a faster response speed and better motion intensity resolution. The friction nanogenerator converts external mechanical stimulation into electrical pulses of corresponding intensity, does not require battery power supply, and avoids the sensor's dependence on battery power supply.

A simple and efficient method for preparing high-purity rubidium chloride includes the following steps: Adding crude rubidium salt to glacial acetic acid, heating and stirring to dissolve, filtering to remove insoluble impurities, yielding a crude rubidium salt solution in glacial acetic acid; adding a certain amount of antimony trichloride solution to the crude rubidium salt solution in glacial acetic acid, stirring the reaction to obtain a small amount of pale yellow precipitate and solution until the reaction reaches equilibrium, yielding a clear liquid and precipitate, the precipitate being used to prepare high-purity cesium salt; secondary precipitation: adding a certain amount of tin tetrachloride solution in glacial acetic acid to the clear liquid, stirring the reaction to obtain a white precipitate and solution; standing, filtering, and washing: cooling and standing the solution until the reaction reaches equilibrium, filtering, washing the precipitate with glacial acetic acid, yielding a precipitate and washing liquid; double salt decomposition: adding high-purity water to the precipitate to form a slurry, then adding ammonia to adjust the pH value, filtering to obtain tin hydroxide precipitate and rubidium chloride solution; sending the filtrate for testing: evaporating the qualified rubidium chloride solution to dryness, calcining to obtain rubidium chloride; recrystallization: obtaining the high-purity rubidium chloride product. It has the advantages of effectively removing cesium ions from crude rubidium salt and avoiding the influence of alkali metal ions on the purity of the final product, without loss, and with high product purity.