193 results about "Bromide ions" patented technology

The utility model belongs to the technical field of bromine extraction electrolytic baths, and particularly relates to a series-parallel connection combined bromine extraction electrolytic bath and bromine extraction equipment. The electrolytic bath is packaged and formed through a bath body packaging structure, an electrolytic ion membrane is arranged in the middle of the interior of the electrolytic bath, the electrolytic bath is divided into a cathode chamber and an anode chamber through the electrolytic ion membrane, and electrolytic plates are arranged on the two sides of the electrolytic ion membrane; a cathode water inlet pipe is arranged in the middle of the cathode chamber, a cathode gas outlet pipeline is arranged at the top, and a cathode liquid outlet pipeline is arranged at the bottom; an anode gas outlet pipeline is arranged at the top of the anode chamber; and an anode liquid outlet pipeline is arranged at the bottom. The electrolytic cells can be connected in series or in parallel, bromide ions with different concentrations can be treated, and the treatment capacity can be adjusted according to the water volume; the problem of enrichment of hydrogen in the electrolytic bath is solved, and the pressure in the electrolytic bath is balanced; the function tank achieves the effects of gas-liquid separation, temperature control and water inlet adjusting and buffering.

The invention provides a synthesis method of a bromide ion adsorbent for salt lake bromine extraction, and belongs to the technical field of adsorbent preparation, a mixed solution of strontium chloride and manganese chloride and a mixed solution of sodium phosphate and sodium hydroxide are subjected to precipitation reaction to obtain A-Sr4Mn6 (PO4) 6 (OH) 2; the preparation method comprises the following steps: reacting A-Sr4Mn6 (PO4) 6 (OH) 2 with a sodium bromide solution to obtain B-Sr4Mn6 (PO4) 6Br2; and reacting the B-Sr4Mn6 (PO4) 6Br2 with a sodium hydroxide solution to obtain Sr4Mn6 (PO4) 6 (OH) 2, namely the bromide ion adsorbent. The prepared adsorbent can selectively adsorb bromide ions from high-salt brine, and has the advantages of high adsorption capacity, high selectivity, high recyclability and the like; in brine with extremely high chloride ion concentration, low-concentration bromide ions can be selectively adsorbed without being influenced by high-concentration chloride ions; in a high-salt water body, the adsorption capacity on bromide ions is higher; the selective adsorption separation of the chloride ions and the bromide ions is realized.

The invention discloses a two-phase electrolyte, a preparation method thereof and a liquid energy storage battery system, and belongs to the technical field of electrochemical energy storage. According to the invention, a liquid-liquid double-phase electrolyte is composed of a water-phase electrolyte and an organic-phase electrolyte, wherein the organic-phase electrolyte contains a coupling system of 1-(methyl-decyl)-3-methylimidazolium bromide, tris (methyl-decyl) methyl ammonium bromide and (10-octadecyl) alkyl trimethyl ammonium bromide in a molar ratio of (5-7): (2-4): 1. During charging, positive electrode bromide ions are subjected to an oxidation reaction to generate a bromine simple substance, and meanwhile, the bromine simple substance and a coupling system of the quaternary ammonium bromide compound and the bromine complexing agent provided by the invention form a stable polybromine complex product, so that the polybromine complex product is prevented from being migrated into a water-phase electrolyte, and the purpose of improving the stability of the water-phase electrolyte in the absence of a diaphragm is achieved. The self-discharge reaction of bromine is significantly inhibited at a high temperature exceeding the boiling point temperature of bromine, the coulombic efficiency and energy efficiency of the liquid energy storage battery are improved, the system cost is reduced, and the long-term cycle stability of the liquid energy storage battery is improved.

The main object of the present invention is to provide an organic EL display that has excellent light emission characteristics to enable low voltage driving and has light emitting elements with high reliability, thereby serving to realize a desired current density. Provided is a display device including a substrate, a first electrode, a second electrode, a pixel separation layer, and an organic layer containing a light emitting layer, wherein the pixel separation layer contains a colorant (D-DL), has an optical density of 0.5 to 3.0 in the visible light wavelength range per μm of the thickness of the pixel separation layer, and has a plurality of pixel parts in a plan view. The detection intensity of the sulfur ion (S−), the detection intensity of the chlorine ion (Cl−), the detection intensity of the bromine ion (Br−), and the sum of the detection intensity of the chlorine ion (Cl−) and the detection intensity of the bromine ion (Br−), all measured by time-of-flight secondary ion mass spectrometry at a position 3 nm deep in each pixel part from the surface of the first electrode, the surface being in contact with the organic layer containing a light emitting layer, satisfy relationships represented by specific general formulas.

A preparation method for passivating an inorganic perovskite solar cell based on an S-(2-aminoethyl) isothiourea bromine onium hydrobromide field is characterized in that S-(2-aminoethyl) isothiourea bromine onium hydrobromide is used as a passivation material to be applied to the surface of an inorganic perovskite thin film, and a uniform passivation layer is formed on the surface of perovskite; the electric field distribution between the perovskite layer and the electron transport layer is significantly improved, the separation and transport of carriers are promoted, and non-radiative recombination is inhibited. Amino groups and thiourea groups in S-(2-aminoethyl) isothiourea bromine onium hydrobromide molecules can form stable coordinate bonds with uncoordinated lead ions on the surface of perovskite, so that the S-(2-aminoethyl) isothiourea bromine onium hydrobromide molecules are effectively anchored on the surface. Meanwhile, bromine ions in the S-(2-aminoethyl) isothiourea bromide onium hydrobromide can fill halogen vacancies in perovskite crystal lattices, so that the defect density is further reduced. And the interface characteristic between the perovskite and the electron transport layer is obviously improved, so that the photoelectric conversion efficiency and the stability of the cell are improved.

The invention relates to an electrolyte for synergistically stabilizing positive electrode iodine multi-electron reaction through four-combination zinc salt and a high-surface-capacity zinc-iodine soft package battery. The electrolyte comprises the four-combination zinc salt and water, in the electrolyte, the total concentration of zinc ions in the four combinations of zinc salts is 2 + / -0.2 mol / L; the four-combination zinc salt is a four-combination zinc salt; the SO4 < 2-> in the electrolyte buffers the pH value of a system, so that side reaction of a negative electrode is reduced; cH3COO <-> can be cross-linked with I3 <->, so that shuttling of polyiodide is inhibited, and reversibility of a two-electron reaction is enhanced; bromide ions Br <-> in the electrolyte are chemically combined with I < + > through isohalogen to excite four-electron reaction; the trifluoromethanesulfonate OTf <-> with strong electronegativity surrounds the positive electricity I < + > by virtue of an ion atmosphere effect, so that active water molecule attack hydrolysis failure is avoided, a synergistic stable positive electrode iodine multi-electron reaction is realized, and the high-surface-capacity zinc-iodine soft package battery is beneficial to promoting the development of the zinc-iodine battery to practical application.

The invention discloses a method for removing bromine ions in a salt water body. The method comprises the steps of pretreatment before electrolytic oxidation, primary precise directional electrolysis, primary split-pole separated air real-time air stripping, secondary precise directional electrolysis, secondary split-pole separated air real-time air stripping, deep removal of bromine ions Br <-> by a reverse osmosis membrane, separation of bromine carrier airflow containing Br2 and the like. According to the method, the problems of environmental friendliness, economical efficiency, relatively good adaptability, directivity of a bromine ion Br <-> removal standard and how to deeply remove the bromine ion Br <-> in the prior art can be solved, and the Br <-> in the salt water body can be reduced to 10 ppm or below; the unit operation in the process path is basically conventional operation or universal operation, and has a good engineering feasibility foundation and an economic feasibility foundation.

The invention discloses a PbS quantum dot film which comprises a PbS-PbX2 quantum dot layer and a passivation layer covering the surface layer of the quantum dot layer. Wherein X is I and / or Br, and the passivation layer is made of iodine 3-aminopropionate and / or bromine 3-aminopropionate. Iodine 3-aminopropionate and / or bromine 3-aminopropionate are / is used as a passivator of the PbS-PbX2 quantum dot layer, amino (-NH2) and carboxylate radical (-COO-) in the iodine 3-aminopropionate and / or bromine 3-aminopropionate molecules can be used as bidentate ligands to be anchored on the surfaces of lead sulfide (PbS) quantum dots, the sulfur vacancy defect is filled, and the density of surface dangling bonds is reduced; and iodine or bromide ions are combined with Pb < 2 + > on the surfaces of the PbS quantum dots to form stable Pb-X bonds, so that non-radiative recombination can be inhibited, and the photoelectric conversion performance of the device is further optimized.

The invention relates to a silver nanowire preparation technology, and aims to provide a method for preparing a high-length-diameter-ratio silver nanowire in one step through a solvothermal synthesis reaction. Comprising the following steps: mixing and stirring silver ions and a PVP (Polyvinyl Pyrrolidone) solution, continuously adding bromide ions and chloride ions serving as a nucleating agent, and mixing and stirring to obtain a reaction solution; transferring the reaction solution into a hydrothermal reaction kettle, and reacting under a heating condition to obtain a silver nanowire mother solution; and sediments in the silver nanowire mother liquor are separated and cleaned, and the silver nanowires with the length-diameter ratio being 2148-3190 are obtained. By means of a cooperative regulation mechanism of bromide ions, chloride ions and polyvinylpyrrolidone, the problem that in existing research work, the length and the diameter of the silver nanowire are difficult to consider at the same time is solved, and it is ensured that the length of the silver nanowire is maintained while the diameter of the silver nanowire is reduced; the technological process is simplified, and the problems of nitrogen atmosphere reaction, secondary heating and the like in the prior art are solved; and by optimizing all reaction parameters, stable and controllable preparation of the silver nanowire with the high length-diameter ratio is finally achieved.

The invention relates to the technical field of preparation of propylene carbonate, and discloses a bromide ion intercalated magnesium-aluminum layered hydroxide as well as a preparation method and application thereof. The method comprises the following steps: (1) providing an aqueous solution containing an aluminum source and a magnesium source, mixing the aqueous solution containing the aluminum source and the magnesium source with an alkali source, aging the obtained mixed solution, and then separating out a solid phase; and (2) mixing the solid phase obtained in the step (1) with an aqueous solution containing a bromine source, aging the obtained turbid liquid, and then carrying out solid-liquid separation. The bromide ion intercalated magnesium-aluminum layered hydroxide prepared by the method provided by the invention can effectively catalyze ring opening of epoxypropane, can obtain obviously higher propylene carbonate yield under mild conditions, cannot be inactivated after being used as a catalyst for many times, and has higher stability.

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 provides a manganese dioxide / bismuth oxybromide heterojunction photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of photocatalytic reduction of carbon dioxide by a nano material. The preparation method of the manganese dioxide / bismuth oxybromide heterojunction photocatalyst comprises the following steps: dispersing a bismuth source and manganese dioxide into water to obtain a suspension, adding a bromine source into the suspension, and reacting bismuth ions in the bismuth source with bromine ions in the bromine source by a chemical precipitation method to obtain the manganese dioxide / bismuth oxybromide heterojunction photocatalyst. A bismuth oxybromide nanosheet is loaded on the surface of manganese dioxide, and the manganese dioxide / bismuth oxybromide heterojunction photocatalyst is obtained. In the preparation process, a bromine source and a bismuth source are subjected to in-situ synthesis on the surface of manganese dioxide to obtain bismuth oxybromide, and the prepared manganese dioxide / bismuth oxybromide heterojunction photocatalyst has excellent photocatalytic performance.

The invention belongs to the technical field of measurement, and relates to an intelligent correction method for an ultraviolet spectrum signal of a seawater nitrate sensor. The method comprises the following steps: 1, calculating absorbance data of each sample at different temperatures; 2, preprocessing the absorbance data by adopting a self-adaptive wavelet denoising algorithm; 3, performing linear fitting on the preprocessed data within the wavelength range of 240-260nm to obtain a linear equation; the absorbance data obtained after baseline correction is determined as the absorbance of the bromide ions; 4, calculating the molar extinction coefficient of the bromide ions, and solving a linear relation between the natural logarithm of the molar extinction coefficient of the bromide ions and the temperature; 5, temperature correction is conducted on the molar extinction coefficient of the bromide ions; 6, salinity correction is conducted through the salinity credible factor, and finally the bromide ion absorbance subjected to temperature salinity correction is obtained. According to the method, the problems of bromine ion spectrum overlapping interference, random noise, baseline interference, temperature-salt interference and the like can be effectively solved.

The invention provides a PTA wastewater treatment method, which comprises: carrying out biodegradation treatment and membrane separation treatment on to-be-treated PTA wastewater, carrying out adsorption treatment through an adsorption resin, and carrying out ultrafiltration and reverse osmosis treatment, wherein the adsorption resin is formed by compounding zeolite and a polymer, and is obtained by the following method: uniformly mixing zeolite, styrene, divinylbenzene, an initiator, a pore-foaming agent and 3-methyl-5-vinylpyridine to obtain an oil phase; uniformly mixing water and a dispersing agent to obtain a water phase; and uniformly mixing the oil phase and the water phase, stirring, and carrying out polymerization reaction to obtain the adsorption resin. According to the PTA wastewater treatment method disclosed by the invention, a physical process and a biochemical process are combined, so that pollutants such as bromide ions can be effectively removed, and the wastewater recycling requirement is met.

The invention relates to the technical field of organic synthesis, in particular to a method for synthesizing cyclopentane compounds through [3 + 2] cycloaddition reaction of aryl cyclopropane and olefin under the synergistic catalysis of bromide ions / visible light. The method comprises the following steps: in a nitrogen atmosphere, sequentially adding aryl cyclopropane, a benzyl malononitrile derivative, pyridine tribromide and a photocatalyst into a reaction solvent to obtain a mixture, stirring the mixture at the temperature of 40 DEG C under the irradiation of a 12W blue light LED lamp until the reaction is complete, and performing concentration and column chromatography purification to obtain the cyclopentane compound. The method has the advantages of mild reaction conditions, simple operation, simple and easily available raw materials and low cost.

The application discloses a vanadium-bromine flow battery electrolyte, a preparation method thereof and a flow battery. The electrolyte comprises a positive electrolyte and a negative electrolyte. The positive electrolyte contains water, bromine ions and an additive. The additive is a pyridine derivative and / or an imidazole derivative. The negative electrolyte contains an acid, vanadium ions and water. The preparation method comprises the following steps: mixing a bromine source with water, and then adding the pyridine derivative and / or the imidazole derivative to obtain the positive electrolyte; dissolving a vanadium source with an acid, and then filtering to obtain a filtrate; adding water to the filtrate, and then adjusting the concentration of vanadium ions to a target final concentration to obtain the negative electrolyte. The flow battery comprises the above-mentioned vanadium-bromine flow battery electrolyte, a positive electrode, an ion-conducting membrane and a negative electrode. The application solves the problems of low energy density, high price and cost, zinc dendrite and positive bromine volatilization of the current flow battery by introducing the coupling of a vanadium-based energy storage medium and a bromine oxygen reduction-oxidation couple.

The invention discloses a method for synthesizing a trace ruthenium modified cobaltosic oxide nanocage catalyst by an ion exchange method, which comprises the following steps: dropwise adding a methanol solution of dimethylimidazole into a methanol solution containing cobalt nitrate hexahydrate, and reacting to obtain a precursor ZIF67; dropwise adding the ethanol solution of ruthenium chloride into the ethanol solution containing the ZIF67 to obtain ruthenium modified ZIF67; and calcining the ruthenium modified ZIF67 to prepare the trace ruthenium modified cobaltosic oxide nanocage catalyst. The invention also discloses an application of the catalyst in preparation of 2-bromoethanol by electro-catalytic oxidation of ethylene, and the catalyst shows high intrinsic activity and high catalytic activity. A trace amount of metal ruthenium is introduced into the cobalt-based catalyst to form abundant Ru-O-Co asymmetric active sites, and meanwhile, the electronic structure on the surface of the catalyst and the activation energy barrier of bromide ions in the electro-catalytic reaction process are changed through dissimilar metal doping, so that the catalytic performance is improved.

The invention discloses a purification method of bromine, which comprises the following steps: continuously feeding crude bromine from the middle of a tower reactor, continuously feeding an aqueous solution containing bromine ions from the top of the tower reactor, and controlling the temperature of the tower reactor, so that chlorine in the bromine reacts with the aqueous solution containing the bromine ions in the tower, and purified bromine is extracted from the tower top. The tower reactor is adopted to purify bromine, continuous feeding and discharging are achieved, operation is easy, convenient and feasible, the purification efficiency is high, the chlorine content in bromine can be reduced to 0.01% or below, and the quality of bromine is improved to a large extent.

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 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 invention belongs to the technical field of organic electrochemical synthesis, and particularly relates to an electrochemical preparation method of 3, 4-dibromo pyrazole. 3, 4, 5-tribromopyrazole is adopted as a substrate, the problems that pyrazole is low in stability and prone to ring opening are effectively solved by adjusting the concentration of the substrate, cathode and anode electrode materials and the electrolytic potential, the yield of the prepared 3, 4-dibromopyrazole is higher than 60% and far exceeds the synthesis yield of an existing 3, 4-dibromopyrazole debromination synthesis method in the background technology, and the method is suitable for industrial production. And the preparation process is simpler. According to the application, 3-bromo pyrazole and 3, 4, 5-tribromo pyrazole are added and subjected to electrochemical reduction debromination at a cathode to generate 3, 4-dibromo pyrazole and bromide ions, the bromide ions lose electrons at an anode and are electrically oxidized into bromine, and the bromine reacts with the 3-bromo pyrazole to generate the 3, 4-dibromo pyrazole.

The invention discloses a method and a device for rapidly measuring the concentration of various inorganic anions in water. According to the method, rapid and high-precision colorimetric detection of eight ions such as fluorine ions, chloride ions, nitrite ions, bromide ions, nitrate ions, phosphate radicals, sulfite radicals and sulfate radicals is realized by adopting a reaction strategy of adding a color developing auxiliary agent and a specific color developing agent step by step and combining with step-by-step uniform mixing and optimizing a reagent combination, a concentration ratio and a reaction time sequence aiming at different target ions. The device comprises a sample groove, a multi-cavity color developing agent bin, a color developing auxiliary bin, a reaction tank, a liquid path conveying module, an image acquisition module and a control module which are integrated in a shell. Through deep integration of a chemical system and an automatic process, the problems of cross interference, poor color development stability, complicated operation and the like in multi-index detection of portable equipment are solved, and the method has the advantages of high detection speed, high accuracy, strong anti-interference performance, easiness in carrying and simplicity and convenience in operation.

The invention belongs to the field of post-treatment of organic chemical synthesis methods, and relates to a post-treatment method for propiconazole synthesis. A crude propiconazole product is used as a raw material and is subjected to an isomerization reaction under the combined action of a bromine-containing ionic liquid and sodium alkoxide to generate cis-propiconazole. The bromine-containing ionic liquid is imidazolium bromine salt: [CnH2n + 1-MIM] + Br <-> (n = 2-4) or pyridinium bromine salt: [CmH2m + 1-Py] + Br <-> (m = 2-4). The method is mild in process condition, low in reaction temperature, short in process path, simple to operate and high in safety, efficient conversion of low-efficiency trans-propiconazole and ineffective isomers is achieved, the content of cis-propiconazole in a treated sample is as high as 99%, the yield is as high as 97%, the economical efficiency of the process is improved, and the method is suitable for industrial production. And the ionic liquid used in the reaction can be further recycled, so that the atom utilization rate is increased.

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 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).

The present invention relates to the preparation and use of high-entropy nanozymes with multi-pathway synergistic antibacterial effects, belonging to the field of nanozyme catalytic materials. The present invention, for the first time, utilizes a hydrothermal method and high-temperature calcination method to synthesize oxygen-vacancy-rich high-entropy oxides with haloperoxidase-like, peroxidase-like, and glutathione oxidase-like activities. These oxides can catalyze bromide ions and hydrogen peroxide to generate hypobromous acid, which interferes with bacterial quorum sensing, and hydroxyl radicals, which disrupt structure and function. Furthermore, these oxides consume glutathione, which maintains the internal redox balance of bacteria. This allows for multi-pathway synergistic and efficient bacterial damage and inactivation, helping to address the problems of existing antifouling nanozyme materials, which suffer from a single catalytic pathway and poor component adjustability. This allows for the practical expansion of high-entropy nanozyme coatings, and has potential application prospects in the field of marine biofouling.

The invention relates to the technical field of water treatment, and discloses a method and a device for recycling bromine triions based on irradiation coupling electronic control ion exchange and application, the method comprises the following steps: placing a bromine-containing stock solution in an electronic control ion exchange device which is a single-chamber device, irradiating the bromine-containing stock solution by using gamma rays, bromine ions in the bromine-containing stock solution are oxidized and react to form bromine triions; and then switching on a circuit and applying an oxidation potential to the working electrode to drive the bromine triions to directionally move towards the membrane and adsorb the bromine triions, and selectively recovering the bromine triions. The device comprises a single-chamber reactor, a liquid path system, a gamma-ray irradiation source for the single-chamber reactor, an electrochemical driving system, a two-electrode system with electrodes immersed in a bromine-containing stock solution, and a potential control system.

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.

Disclosed is an alkali metal ion conductor which behaves as a liquid at a low temperature. The alkali metal ion conductor of the present disclosure is an alkali metal ion conductor comprising a salt, wherein the salt comprises a first cation, a second cation, and a first anion, the first cation is a tetraalkylammonium ion having an alkyl chain length of 5 or more, the second cation is an alkali metal ion, and the first anion is at least one anion selected from the group consisting of a bromine ion, a chlorine ion, and a hydrogen sulfate ion.

Methods and systems are provided for selectively extracting lithium from lithium ion batteries while avoiding the extraction of other metals from such batteries. The method involves contacting a sample including a lithium ion battery with an aqueous mixture of Br2 and a bromide reagent that dissociates in water to provide a bromide ion, and allowing the aqueous mixture to leach lithium ion from the sample as an aqueous solution of LiBr. LiBr is then recycled. For embodiments wherein the bromide reagent is HBr, hydrogen and bromine can be recovered as gases.