224 results about "Iodide ion" patented technology

The invention discloses a method for preparing a solar cell by inhibiting perovskite iodine migration and modifying a thin film through a piperazine derivative, and belongs to the technical field of perovskite solar cells. According to the method, a piperazine derivative is used between a perovskite layer and an electron transport layer, so that the piperazine derivative has the functions of modifying a perovskite thin film and inhibiting iodine migration. A modified perovskite light absorption layer is obtained by spin-coating a piperazine derivative solution on the surface of perovskite. The piperazine derivative can act with the iodine simple substance generated after the perovskite material is degraded, and decomposes the iodine simple substance to generate iodide ions, so that further degradation of the perovskite film is prevented, contact between the iodine simple substance and a silver electrode is reduced, and the stability of perovskite is improved. Meanwhile, the material can effectively passivate lead site defects on the surface of the perovskite thin film, and non-radiative recombination generated at the defects is reduced. According to the method, perovskite degradation and silver electrode damage caused by iodine elementary substance volatilization can be effectively inhibited, and an efficient and stable perovskite solar cell device is finally obtained.

The invention relates to a multifunctional mixed electrolyte for high-magnification long-cycle multi-electron reaction. The electrolyte is an aqueous electrolyte containing zinc salt, iodized salt and bromine salt; wherein the molar concentration of the zinc salt is 1-3 M, the molar concentration of the iodized salt is 0.1-1 M, the molar concentration of the bromine salt is 0.1-1 M, and the molar ratio of bromine ions to iodide ions is 0.1-10. The zinc-double-halogen battery has high ionic conductivity, efficient active substance utilization rate, excellent cycle performance and higher rate capability, and the electrochemical performance of the zinc-double-halogen battery can be remarkably improved.

The invention belongs to the technical field of water electrolysis hydrogen production, and discloses a branched polyaromatic piperidine anion exchange membrane, a preparation method and application. The preparation method comprises the following steps: preparing a branched polymer precursor, preparing a quaternized branched polymer, and preparing the branched anion exchange membrane: dissolving the quaternized branched polymer in a third solvent, and drying in a vacuum drying oven to obtain the branched anion exchange membrane in the form of iodide ions, and soaking the branched anion-exchange membrane in the form of iodide ions in a NaOH solution for ion exchange, so that the branched anion-exchange membrane in the form of iodide ions is completely converted into a form of hydroxyl ions. According to the invention, ether-free skeleton polyaromatic hydrocarbon is selected as a main chain and has the characteristic of strong alkali-resistant stability, six-membered nitrogen heterocyclic ions are adopted as functional groups, and a large steric hindrance structure can hinder nucleophilic substitution and elimination reaction, so that the alkali-resistant stability of the anion exchange membrane is improved, and the service life of the anion exchange membrane is prolonged.

The invention discloses a zinc-iodine battery positive electrode material and a preparation method and application thereof, the zinc-iodine battery positive electrode material comprises carbon cloth, a covalent organic framework and an active substance, the covalent organic framework is 8F-COF, the covalent organic framework 8F-COF grows on the carbon cloth in situ, and the active substance is adsorbed on the carbon cloth. The material is flexible and self-supporting, energy storage is further improved, the service life of the zinc-iodine battery is further prolonged, an 8F-COF material is grown on carbon cloth in situ, 8F-COF has a microporous structure containing F atoms, when polyiodide ions pass through the porous structure, the 8F-COF connects polyiodide to a polymer skeleton through an aromatic nucleophilic substitution reaction, and thus the energy storage capacity of the zinc-iodine battery is improved. The iodide is effectively inhibited through space and electrostatic hindering, and the shuttle effect is reduced. And after being loaded with iodine, the material can be directly used as an electrode material without adding any conductive agent and binder.

The present invention discloses a method for adsorbing radioactive iodide ions in radioactive wastewater, which includes the following process: adding silver copper oxide to the radioactive wastewater, and the iodide ions in the radioactive wastewater react with the silver copper oxide, so that the concentration of iodide ions in the radioactive wastewater is reduced. The adsorption of radioactive iodide ions in radioactive wastewater by the silver copper oxide of the present invention belongs to chemical adsorption, which has the characteristics of fast adsorption speed, high adsorption efficiency and adsorption capacity, the adsorbed product is not easy to desorb, is easy to solidify and dispose, is convenient for recycling, is convenient to use and is not easily affected by interfering ions and pH. The silver copper oxide has a strong selective adsorption effect on iodide ions in the wastewater environment of long half-life radioactive element iodine, and can effectively improve the radioactive pollution of iodine in the water environment, and solve the main problems of spent fuel reprocessing and radioactive water pollution.

The invention provides a passivation method of a perovskite solar cell and the perovskite solar cell. The passivation method of the perovskite solar cell comprises the following steps: passivating the perovskite solar cell by using a multi-component passivation system; wherein the multi-component passivation system comprises a passivator containing double amino groups and iodide ions; a passivator containing a benzene ring and an amino group; the invention relates to a passivator containing piperazine rings and iodide ions. Through the synergistic effect of the ternary passivating agent, crystal defects are better passivated, energy level matching is improved, and cell interface filling is better, so that the series resistance of the solar device is lower, and the open-circuit voltage is higher.

The invention relates to a multi-metal hydroxide and iodine composite material as well as a preparation method and application thereof. According to the invention, efficient chemical adsorption of negatively charged iodine species (such as I <-> and I3) in the electrolyte is realized by utilizing the unique layered structure and the characteristic that the surface of the multi-metal hydroxide material is positively charged, so that the iodine-loaded positive electrode material is successfully prepared. The physical confinement and strong electrostatic interaction of the material can effectively anchor an iodine active substance, inhibit the dissolution and shuttle effect of polyiodide ions, and significantly reduce the loss of the active substance in the cycle process. Meanwhile, bromide ions or chloride ions are introduced into the electrolyte to anchor I < + >, so that a four-electron transfer reaction mechanism of iodine is realized, and the specific capacity of the battery is greatly improved. Experimental results show that the capacity retention rate of the zinc-iodine battery adopting the positive electrode material reaches 88% or above after circulation for 30000 times under the current density of 10 Ag <-1 >, and the zinc-iodine battery shows excellent high-capacity performance and long circulation stability. The invention provides a new technical scheme for developing a high-performance aqueous zinc-iodine battery, and has a wide application prospect in the field of energy storage.

The invention belongs to the technical field of organic synthesis, and particularly relates to a preparation method of an olefin monomer of benzocrown ether imidazole polymerized ionic liquid. Comprising the following steps: adding benzo-12-crown-4-ether, iodo-alkyl acid and polyphosphoric acid into a heat preservation kettle, carrying out heating reaction, adding chloro-alkyl acid, carrying out heating reaction, dropwise adding water to hydrolyze residual polyphosphoric acid, extracting an organic phase by chloroform, washing chloro-alkyl acid by using a sodium carbonate aqueous solution, drying, carrying out suction filtration, and transferring into a reaction kettle; adding 1-methylimidazole, carrying out heating reaction, carrying out rotary evaporation to obtain chloroform, adding dioxane, triethylamine and hydroquinone, carrying out heating reaction, and carrying out rotary evaporation to obtain dioxane; the ionic liquid, organic salt and pure water are added into a dissolving kettle, dichloromethane is used for extracting an organic phase, pure water is used for washing chloride ions and iodide ions in the organic phase, dichloromethane is obtained through rotary evaporation, and a product is dried in vacuum. According to the method, the steps of acylation, quaternization and dehydrohalogenation are used, so that the steps are simplified, and the purification treatment process of acylation after quaternization is avoided.

This invention discloses a zinc-iodine battery and an electrode carrier that can simultaneously suppress polyiodine ion shuttle and regulate zinc deposition behavior, wherein the electrode carrier is Cu. + Coordinated poly(3,4-ethylenedioxythiophene) (Cu-PEDOT), via a solvothermal method, to convert Cu... + It was prepared by coordinating with S atoms in the PEDOT framework. I₂ was loaded onto this support as the positive electrode, and Zn was electrochemically deposited as the negative electrode to assemble a battery. The atomically monodisperse Cu in this invention... + It not only enhances the chemisorption of polyiodides as a Lewis active site, but also significantly reduces I... ‑ / I 0 Conversion energy barrier, accelerates reaction kinetics and suppresses shuttle effect; at the same time, Cu + The zinc-affinity property of the substrate reduces the Zn nucleation overpotential, guides Zn to deposit uniformly along the (002) crystal plane, and suppresses dendrites. Zinc-iodine batteries based on this substrate exhibit excellent rate performance and ultra-long cycle stability, and achieve dendrite-free negative electrode growth even under high depth-of-discharge conditions. This invention solves the problem of simultaneous multi-iodide shuttle in the positive electrode and zinc dendrite growth in the negative electrode using a single substrate, significantly improving the energy density and cycle life of the battery.

The application relates to a liquid flow energy storage device and relates to the technical field of new energy sources. The liquid flow energy storage device comprises an energy storage system and a discharge system, the energy storage system and the discharge system both comprise an electric membrane stack, the electric membrane stack comprises a positive electrode chamber, a proton chamber and a negative electrode chamber which are sequentially arranged and are in fluid communication, liquid in the proton chamber only transmits protons and does not participate in electrochemical reactions in the energy storage system and electrochemical reactions in the discharge system, so that even if a small amount of iodine ions enter the proton chamber, the iodine ions will leave the electric membrane stack along with the circulation of the liquid, and thus the iodine ions in the proton chamber cannot migrate to the positive electrode chamber, the membrane damage caused by the migration of the iodine ions is avoided, and therefore the service life and the efficiency of the electric membrane stack can be greatly improved.

The application relates to the technical field of catalysts, and discloses a limited type iodine-based homogeneous immobilized catalyst as well as a preparation method and application thereof. The catalyst comprises a carrier and iodine ions, magnesium ions and quaternary ammonium ions loaded on the carrier, wherein the molar ratio of the magnesium ions, the quaternary ammonium ions, the iodine ions and the carrier is 0.01-1:4-15:1-30:1. The limited type iodine-based homogeneous immobilized catalyst disclosed by the application enhances the electrostatic interaction between iodine ions and quaternary ammonium ions through the molecular sieve limiting effect to construct a limited type structure. The catalyst has significantly enhanced CO2 adsorption and activation capacity, can activate an epoxide compound, and accelerates the ring opening of the epoxide compound. In a cycloaddition reaction catalyzed by the catalyst under the conditions of no solvent and no auxiliary agent, the conversion rate of propylene oxide can reach more than 73%, and the propylene carbonate selectivity can reach more than 85%.

The invention provides a method for resource utilization of iodine-containing organic waste and recovery of iodine, and belongs to the technical field of waste resource utilization. The method comprises the following steps: gasifying the iodine-containing organic waste at a high temperature of 1100-1750 DEG C in a pure oxygen atmosphere, and carrying out partial oxidation reaction, namely incomplete combustion, on the iodine-containing organic waste by controlling the oxygen amount to generate crude synthesis gas with H2, CO, CO2, H2O and HI as main components; the obtained crude synthesis gas is washed with water, HI is converted into a solution containing-1 valence iodide ions, then the iodide ions are further converted into iodized salt, recovery of iodine in the iodine-containing organic waste is achieved, and the difficulty and cost of the iodine recovery process are reduced; and in the high-temperature gasification process of 1100-1750 DEG C, hydrocarbon elements in the iodine-containing organic waste are converted into synthesis gas mainly comprising H2 and CO, so that resource utilization of the hydrocarbon elements can be realized, and secondary pollution cannot be caused.

The invention provides a composition containing metal type theta-iron carbide and epsilon / epsilon '-iron carbide as well as a preparation method and application of the composition. The method comprises the following steps: preparing a metal type theta-iron carbide compound; preparing a metal type epsilon / epsilon '-iron carbide compound; and mixing the metal type theta-iron carbide compound and the metal type epsilon / epsilon '-iron carbide compound to obtain the metal type iron carbide composition containing theta-iron carbide and epsilon / epsilon'-iron carbide, or mixing the metal type theta-iron carbide and the metal type epsilon / epsilon '-iron carbide to obtain a metal type iron carbide mixture; and carrying out dipping treatment on the metal type iron carbide mixture to enable the metal type iron carbide mixture to contain bromide ions and / or iodide ions. According to the composition disclosed by the invention, halide ions such as bromine or iodine are introduced into the components of the composition to serve as a catalyst for a synthesis gas conversion reaction, so that the reaction has a relatively high CO conversion rate and the like, and comprehensive optimization of a reaction result is realized.

The invention relates to a hydroiodic acid preparation device and method, and relates to the technical field of new energy. The hydriodic acid preparation device comprises a first phosphoric acid circulating device, a second phosphoric acid circulating device, a hydriodic acid circulating device, a deiodide ion device and a membrane module, and the membrane module comprises a first phosphoric acid chamber, a second phosphoric acid chamber and a hydriodic acid chamber which are sequentially arranged and are in fluid communication. The second phosphoric acid chamber is communicated with the iodide ion removal device, so that even if a small amount of iodide ions enter the second phosphoric acid chamber, the iodide ions can enter the iodide ion removal device along with the circulation of the liquid to be subjected to deiodination treatment, the liquid subjected to deiodination treatment returns to the membrane module again to be recycled, and at the moment, the iodide ions contained in the circulating liquid do not exceed the standard; the iodide ions in the second phosphoric acid chamber cannot migrate to the first phosphoric acid chamber, so that the anode membrane cannot be damaged due to migration of the iodide ions, the service life of the membrane module can be greatly prolonged, and the production efficiency of the membrane module can be greatly improved.

This operation method of an electrodialysis device includes an electrodialysis step for electrodialyzing an aqueous solution that contains halide ions and a polar organic solvent using an electrodialysis device which is provided with an anion exchange membrane manufactured by a crosslinking polymerization method. The aqueous solution contains 200 mg / L or more of iodide ions. In the electrodialysis step, if an electrodialysis test using a desalination liquid that contains iodide ions and sulfate ions is performed, the anion exchange membrane includes an anion exchange membrane with which TI / TSO4 is 3.5 or more, where TI is the transmission rate (%) of iodide ions (I-) and TSO4 is the transmission rate (%) of sulfate ions (SO4 2-) in the concentrated liquid, at the time when the residual ratio of iodide ions in the desalination liquid is 5%.

The application discloses polylactic acid polyol as well as a preparation method and application thereof, and the preparation method comprises the following steps: preparing an in-situ catalyst by heating reaction of a zinc salt, an organic ammonium salt and bis(ethylene carbonate) ether; the anion of the organic ammonium salt is selected from any one of bromide, chloride and iodide; and a lactide monomer is added to obtain polylactic acid polyol through a polymerization reaction. The polylactic acid polyol prepared by the application has a flexible chain segment, can provide better flexibility, and can be applied to preparation of polyurethane materials.

The application discloses a guanidyl-sulfide covalent organic polymer for efficiently capturing iodine ions and a preparation method thereof, and relates to the technical field of iodine-containing wastewater treatment. The guanidyl-sulfide covalent organic polymer has a core structure of guanidyl and a sulfide group, and is formed by being connected through a strong covalent bond, and exhibits excellent chemical stability, thermal stability and radiation resistance, and is especially suitable for application requirements in extreme environments. Meanwhile, the unique N(+) cation in the guanidyl and the C-S-C bond in the sulfide cooperatively act, and the guanidyl-sulfide covalent organic polymer exhibits high removal efficiency and excellent selectivity for iodine ions in iodine-containing wastewater, and has a significant application prospect.

The application provides a preparation method of a hydrogel adsorption material, comprising the following steps: preparing layered double hydroxides (LDHs); loading zero-dimensional carbon nanomaterial into nanocellulose to obtain solution A; dissolving chitosan in acetic acid to obtain solution B; uniformly mixing solution A, solution B and the LDHs dispersed in ethanol to obtain a pre-polymerization solution; adding a crosslinking agent into the pre-polymerization solution, and heating to fully gelate, and then washing to obtain the hydrogel adsorption material. The preparation method of the hydrogel adsorption material can effectively capture and fix iodine ions, and the prepared hydrogel adsorption material has good cycle stability. The application also provides an application of the hydrogel adsorption material in iodine ion adsorption.

The invention relates to the technical field of solar cells, in particular to a solar cell, a preparation method thereof and a photovoltaic module, and the preparation method comprises the steps: sequentially forming a composite layer and a hole transport layer on a bottom cell; forming a PbI2 skeleton layer on the hole transport layer, and coating the PbI2 skeleton layer with a cation wet film to prepare a perovskite light absorption layer; wherein the cationic wet film comprises an anthocyanin antioxidant and a cationic material. According to the preparation method, an anthocyanin antioxidant is introduced into cations to inhibit cation deprotonation and iodide ion oxidation processes, defects formed in the perovskite light absorption layer are reduced, and the film forming quality of the perovskite light absorption layer is improved; and meanwhile, active oxygen free radicals on the surface of the perovskite light absorption layer can be removed, and the problem that the perovskite light absorption layer is easy to accelerate degradation due to water and oxygen in the air is solved, so that the efficiency and the stability of the prepared solar cell are improved.

The invention belongs to the technical field of nylon 66 polymer performance testing, and particularly relates to a method for simultaneously testing the content of iodide ions and bromide ions in a nylon 66 polymer, which comprises the following steps of: extracting the iodide ions and the bromide ions in the polymer by using weak acid salt (sub-carbonate or bicarbonate) instead of potassium nitrate as an ionic strength regulator; the acid environment in the extracted solution is adjusted with formic acid, silver nitrate is adopted as a titrant, iodide ions and bromide ions in the extract liquor are detected at the same time through potentiometric titration, and the problem that the iodide ions and the bromide ions cannot be detected at the same time is solved.

The utility model provides a carbon black iodine absorption value measuring device which comprises a rotating wheel disc, a magnetic stirrer, a transmission filtering device and a reaction tank, a plurality of sample cups can be placed on the rotating wheel disc, after a mixed liquid sample is stirred by the magnetic stirrer, an iodine solution and a sodium thiosulfate solution are extracted by a plunger pump, and the iodine absorption value of the carbon black is measured. In the extraction process, carbon black in the iodine solution is filtered through the filter pipe, filtrate is added into the reaction tank and chemically reacts with the sodium thiosulfate, and the iodine ion electrode in the reaction tank can judge the end point of the reaction by detecting the electron exchange capacity of the iodine solution and the sodium thiosulfate in the reaction tank when the iodine solution and the sodium thiosulfate are subjected to oxidation-reduction reaction. And meanwhile, the measured current data is transmitted to a microcomputer for automatic processing, so that accurate carbon black iodine absorption value data is obtained. The problems that manual operation is low in efficiency and the precision is greatly influenced by human factors are solved, and the advantages of high efficiency and high precision are achieved.

The invention belongs to the field of photovoltaic materials, and provides a flexible perovskite photovoltaic material and a preparation method thereof. The flexible film comprises a flexible substrate layer which is composed of polyethylene glycol terephthalate, and the surface of the flexible substrate layer is modified with nanoscale silicon dioxide particles; the chemical formula of the perovskite active layer is ABX3, A is mixed positive ions of formamidine ions and cesium ions, B is lead ions, and X is mixed halogen of iodide ions and bromide ions; a flexible packaging layer, wherein the flexible packaging layer is formed by compounding polydimethylsiloxane and graphene; according to the invention, by adopting the collaborative design of the flexible substrate (polyethylene glycol terephthalate) with the surface modified by nano silicon dioxide particles and the polydimethylsiloxane and graphene composite packaging layer, the photovoltaic material can bear more than 1000 times of 180-degree bending circulation, and the efficiency attenuation is less than 5%; the perovskite material is obviously superior to a traditional rigid perovskite material (fracture failure can be achieved after 100 times of bending).

This invention discloses an iodine cathode interface conductive polymer slurry, an iodine cathode and its preparation method, and its application in I... ‑ / I2 / I + In the application of positive-valence zinc-iodine batteries, the conductive polymer slurry at the iodine cathode interface is formed by combining an aqueous adhesive and a PEDOT:PSS dispersion. This conductive polymer slurry is uniformly coated onto the surface of the iodine cathode, and after drying, a dense conductive polymer film is formed on the iodine cathode surface. The PEDOT:PSS film of this invention can inhibit polyiodine ion shuttle and I₂ from both physical barrier and chemical adsorption perspectives. + Hydrolysis; when the iodine cathode loading is 10 mg cm⁻¹ ‑2 At that time, the discharge plateau of the zinc-iodine battery was 1.6 V (I 0 / I + ) and 1.2 V(I ‑ / I 0 Its capacity retention rate after 3500 stable cycles is over 91%, effectively improving the performance of the iodine cathode and enhancing the overall performance of the battery; it belongs to the field of battery technology.

The invention relates to the technical field of chemical analysis and detection, in particular to a method for detecting iodide ions in nylon slices. The method for detecting the iodide ions in the nylon slices comprises the following steps: placing the nylon slices in a microwave digestion tank, adding a potassium sulfate aqueous solution with the mass concentration of 0.9-1%, placing the nylon slices in a microwave digestion instrument for digestion, cooling after digestion is finished, and recording the nylon slices as a sample A; and directly introducing the prepared test solution A into an inductively coupled plasma emission spectrometer for determination, and calculating through an iodide ion standard curve to obtain the actual iodide ion content in the sample. According to the method for detecting the iodide ions in the nylon slices, only one-time microwave digestion is needed, multiple times of transfer or complex reaction are not needed, the extraction efficiency is high, and operation is easy; meanwhile, potassium nitrate is replaced by potassium sulfate, so that the accuracy and repeatability of a measurement result are further improved.

The present invention discloses a perylene tetracarboxylic acid ester fluorescent probe for detecting fluoride ions and a detection method thereof, belonging to the technical field of analytical chemistry. The perylene tetracarboxylic acid ester fluorescent probe contains a copper ion and bipyridine-like complex structure and an O-H group. The fluorescent probe of the present invention is simple to synthesize and convenient to use. The coordination effect of copper ions enhances the ability of the O-H group to donate protons, and can specifically react with fluoride ions. Chloride ions, bromide ions, iodide ions, sulfate ions, acetate ions, perchlorate ions and dihydrogen phosphate ions have no obvious interference on the determination of fluoride ion concentration, and have the characteristics of good selectivity and high sensitivity.

The invention provides an I2 / Bi2S3 (at) C composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: step 1, stirring a carbon source, ammonium persulfate, bismuth salt, a sulfur source and polyvinylpyrrolidone to obtain a mixed solution; 2, putting the mixed solution into a reaction kettle for heating reaction, and then putting a reaction product into a tubular furnace for calcining to obtain Bi2S3 at C; and 3, heating the Bi2S3 (at) C and iodine in a closed reaction kettle, and carrying out steam adsorption on the iodine by the Bi2S3 (at) C to obtain the I2 / Bi2S3 (at) C composite material. According to the preparation method, bismuth sulfide is doped on carbon, so that the adsorption capacity and the iodine fixation capacity on iodide ions are improved; the I2 / Bi2S3 (at) C after adsorbing the iodine steam is applied to the positive electrode of the aqueous zinc-iodine battery, so that the battery has the advantages of high specific capacity, slow specific capacity attenuation, good battery stability and the like.

The invention provides a modified glass fiber membrane, a preparation method and application thereof, and a zinc-iodine battery, and belongs to the technical field of zinc-iodine batteries. The modified glass fiber membrane provided by the invention comprises a glass fiber membrane matrix and a halogen-containing polymer bonded on the surface of the glass fiber membrane matrix through a binder. Halogen atoms in the halogen-containing polymer are elements with extremely high electronegativity, and can strongly attract electrons in a polymer chain of a high polymer material, so that electron cloud shift is caused, and negative charges are enriched on the surface of the high polymer material; when the glass fiber membrane adhered with the halogen-containing polymer is assembled into the zinc-iodine battery, due to the electrostatic repulsion effect, iodide ions on the positive electrode side are limited on the surface of the positive electrode, shuttling of the iodide ions is limited, and the cycling stability of the zinc-iodine battery is improved.

The invention provides a pretreatment method of an iodine-containing substance and a determination method of iodine content in the iodine-containing substance, and belongs to the technical field of chemical analysis. The iodine determination method comprises the following two steps: the first step is pretreatment for converting organic iodine into inorganic iodine, and the second step is determination of inorganic iodine. According to the pretreatment, iodine-containing substances are subjected to thermal combustion in a closed environment, iodine in a sample can be forcibly converted into iodine elementary substances, and the situation that the iodine conversion rate is low due to the fact that the sample is not flammable is avoided; the gas generated by combustion is introduced into the absorption liquid and is fully contacted and absorbed with the absorption liquid in a foaming manner, so that the recovery rate of iodine is increased; the iodate reacts with the reducing agent to generate iodide ions by utilizing the oxidability of the iodate under an acidic condition, so that the problem that the iodate is difficult to detect is avoided. The inorganic iodine is determined by an automatic potentiometric titration method, and standard solutions with different concentrations can be used for titration according to the iodine content, so that the detection requirements of different iodine contents are met.

The invention relates to the technical field of aqueous batteries, in particular to a porous non-metal organic framework material, a preparation method thereof and an aqueous zinc-iodine battery, and the preparation method comprises the following steps: mixing organic amine with an organic solvent, mixing the obtained organic amine solution with an inorganic acid solution, and stirring to obtain the porous non-metal organic framework material. Organic amine cations and inorganic acid anions are combined to form metal-free closely-packed ionic clusters, a porous organic halogenated ammonium salt framework material is formed, and the iodine loading capacity of a host can be further improved based on high porosity and large specific surface area of a non-metal organic framework material; due to interaction between nitrogen-containing active sites of the porous non-metal organic framework material and iodine, the shuttle diffusion effect of polyiodide ions can be effectively inhibited, the mutual conversion rate of iodine is improved, reaction kinetics of iodine is accelerated, coulombic efficiency and cycling stability of the zinc-iodine energy storage battery are remarkably improved, self-discharge of the zinc-iodine energy storage battery is inhibited, and specific capacity fading is reduced.

The invention discloses a PBT composite material and a preparation method thereof, and relates to the technical field of modified PBT composite materials. The invention provides a polybutylene terephthalate composite material. The polybutylene terephthalate composite material is prepared from the following components in parts by weight: 50-85 parts of polybutylene terephthalate, 1-10 parts of a titanium dioxide coloring agent, 1-10 parts of an acrylic acid toughening agent, 6-20 parts of ionic liquid and 0.1-1.5 parts of an antioxidant, the ionic liquid is composed of positive ions and negative ions, the positive ions comprise at least one of 1-methylpyridinium ions, 1-butylpyridinium ions, 1-butyl-4-methylpyridinium ions, 1-allyl-1-methylpyrrolidinium ions and 1-butyl-1-methylpyrrolidinium ions, and the negative ions comprise at least one of 1-methylpyridinium ions, 1-butylpyridinium ions, 1-butyl-4-methylpyridinium ions, 1-allyl-1-methylpyrrolidinium ions and 1-butyl-1-methylpyrrolidinium ions. The anions comprise at least one of chloride ions, bromide ions, iodide ions and bis (trifluoromethylsulfonyl) imine ions. Through the special compounding effect of all the components, the polybutylene terephthalate composite material with good fluidity and excellent hydrolysis resistance is prepared.