167 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 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 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 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 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 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 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 relates to a high-stability perovskite quantum dot film and a preparation method thereof, and belongs to the technical field of photoelectric functional materials.The high-stability perovskite quantum dot film is obtained by compounding and curing a composite perovskite quantum dot colloidal solution and polydimethylsiloxane under a certain condition. Calcium ions in a composite perovskite quantum dot colloidal solution serve as Lewis acid, surface oleic acid molecules are effectively replaced, stable chemical bonding is established, the structural stability is enhanced, meanwhile, vacancy defects are filled with iodide ions, surface defects are passivated, in addition, carboxylate radical groups on the surfaces of Zr-MOFs have the very high electron donating characteristic, and therefore the Zr-MOFs material can be used for preparing the high-electron-donating Zr-MOFs material. Pb ions on the surface of after-treatment perovskite quantum dot powder can be effectively passivated, a hydrophobic shell of Zr-MOFs can reduce contact between water molecules and composite perovskite quantum dots, and then a physical protective shell is formed after curing of polydimethylsiloxane, so that erosion of gases such as hydrogen sulfide and oxygen is further isolated.

The invention belongs to the technical field of iodine removal of light salt brine, and particularly relates to a method for removing high-valence iodine in ionic membrane caustic soda light salt brine. Comprising the following steps: (1) adding a pH regulator and sodium sulfite into light salt brine, regulating the pH to 1-3, stirring until the reaction is completed, and carrying out primary adsorption deiodination by adopting a composite adsorbent to obtain light salt brine 1; and (2) adding a pH regulator and hydrogen peroxide into the light salt brine 1, regulating the pH value to 1-2, stirring until the reaction is completed, and carrying out secondary adsorption by adopting a composite adsorbent to remove iodine, thereby obtaining the deiodinated light salt brine. According to the removal method disclosed by the invention, high-valence iodine such as periodate and iodate in the light salt brine is converted into low-valence iodine such as iodate and iodide ions by utilizing the reducibility of sodium sulfite and the oxidation-reduction property of hydrogen peroxide in the coexistence of iodide ions and iodate, and then is further converted into simple substance iodine, and the simple substance iodine is efficiently removed by utilizing a composite adsorbent; the process is simple, the cost is low, the removal rate is high, and the removal effect is good.

The present invention relates to the recovery method of precious metal catalyst in low-pressure methanol carbonylation synthesis acetic acid process, comprise the steps:The rhodium iodine series catalyst solution in acetic acid unit reactor is sampled and analyzed, the content of iodide ion in rhodium iodine series catalyst solution is measured, the methanol reacted with iodide ion is added, to increase the methyl content in rhodium iodine series catalyst solution;Nitrogen is then passed into acetic acid unit reactor, CO volume content is reduced in acetic acid unit reactor, to reduce the generation of CO intercalation reaction;Then acetic acid unit reactor is synchronously heated and boosted to set temperature and pressure, and after maintaining a certain length of time under the set temperature and pressure, decompression at this temperature and gradually pressure relief to normal pressure, rhodium iodine series catalyst solution is cooled to room temperature and standing stratification filtration recovery.The present invention, by increasing methyl content, reduces CO volume content, prompts rhodium to be converted into precious metal precipitation precipitation from the stable state of homogeneous reaction, realizes the recovery of precious metal rhodium.

The application discloses a preparation and purification method of high-purity radioiodine-labeled antigen. The method comprises the following steps: pre-activating carrier-free sodium iodine[125I] solution in an orthogonal solvation sensitization buffer containing lithium sulfate, 18-crown-6 and beta-cyclodextrin; adding antigen and chloramine-T for a labeling reaction; and performing magnetic separation and purification by using a suspension containing adamantane-modified magnetic microspheres and quaternary ammonium salt-modified strong anion exchange magnetic microspheres after the reaction. The orthogonal solvation effect is used to enhance the nucleophilic activity of iodine ions, and the amount of oxidizing agent is reduced to reduce protein damage; impurities are quickly removed through the double mechanisms of electrostatic adsorption and host-guest recognition. The application has the advantages of high labeling efficiency, high radiochemical purity of the product and complete retention of biological activity.

This invention relates to the field of oil additives for power generation, specifically a method for in-situ preparation of black phosphorus nanoparticles (BPNPs) using PVA / PAAM interpenetrating network hydrogel as a microreactor and its application as a wear-resistant additive in lubricating oils. The confinement effect of the interpenetrating network hydrogel results in uniform BPNP size and high crystallinity, thus endowing BPNPs with excellent air / water / oil stability, with an oxidation rate of <5% within 7 days. Swelling allows RP / KI to permeate uniformly and be physically embedded in the network. Subsequently, under a nitrogen protective atmosphere, photolysis of iodine ions generates solvated electrons (e). ‑ (aq) restores RP to P ‑ P ‑ The BP crystal nucleus is formed by recombination, and the IPN three-dimensional nanochannels (pore size 30~120nm) confine and inhibit excessive growth of the crystal nucleus. At the same time, the PVA hydroxyl groups and PAAm amide groups passivate the BP surface in situ through hydrogen bonding / coordination, preventing oxidation.

This invention provides a novel powder and method for its use for the extraction and complexation of gold from sources containing this metal. The powder comprises an optimized combination of borax, sodium bicarbonate, and glycine as a triple buffer system, iodide ion as a leaching agent, a complementary combination of potassium persulfate and potassium monopersulfate (Oxone®) as an oxidant, and a copper salt as a catalyst for the oxidation-reduction cycle. In the proposed method, the powder is contacted with a solid gold-containing feed under mild alkaline conditions and ambient temperature to form a stable iodide-gold complex. This complex can be recovered to pure metallic gold through chemical or electrochemical reduction, and the leaching solution can be reused after recovery without loss of yield.

The invention relates to a quantum dot material, a preparation method and a quantum dot film and a backlight module applying the quantum dot material. The quantum dot material comprises a core layer, a ligand layer and a coating layer. The ligand layer is formed and covers at least a partial region of the surface of the core layer and forms a bond with the core layer. And the coating layer is formed and covers at least partial area of the surface of the ligand layer and is bonded with the ligand layer. The ligand layer is formed by at least three ligand compounds, and the at least three ligand compounds comprise a first type of ligand compound and a second type of ligand compound; the first type of ligand compound has a first coordination group to form a bond with the core layer, and the second type of ligand compound has a second coordination group to form a bond with the coating layer. The core layer has an ABX3 crystal structure, the A site is occupied by formamidine ions, the B site is occupied by lead ions, and the X site is occupied by one of chloride ions, bromide ions and iodide ions. When the wavelength of incident light is 450 nm, the highest emission wavelength of the quantum dot material responding to the incident light is 450-760 nm.

The present invention relates to a method for obtaining iodide ions from a solution comprising a small amount of an iodine-containing aromatic compound, such as a non-ionic X-ray contrast agent, the method comprising the steps of: contacting the solution comprising a small amount of an iodine-containing aromatic compound with activated carbon, thereby adsorbing the iodine-containing aromatic compound contained therein onto the activated carbon; and deiodinating the iodine-containing aromatic compound adsorbed onto the activated carbon.

The invention discloses a method for predicting the pH value and iodide ion concentration of iodine-containing wastewater based on deep learning, and belongs to the field of analysis and detection. The method comprises the following steps: constructing a CNN-ResNet-RF prediction model by combining a light fluorescence spectrum with deep learning; the method comprises the following steps: extracting an internal relationship among a pH value, iodide ion concentration and fluorescence lifetime through a deep neural network, performing feature extraction on a one-dimensional spectrum by using a single convolutional layer and a pooling layer, constructing a decision tree through a random forest, performing a regression task according to a result of the decision tree, and outputting a final prediction result. Therefore, the accurate prediction of the pH value and the iodide ion concentration of the iodine-containing wastewater is realized; more efficient and more accurate prediction is realized, and the overall treatment efficiency of sewage treatment is improved.

The application discloses a preparation method of hollow square block Cu / CuI catalyst and application of the catalyst in photocatalytic reduction of CO2 into multi-carbon products, and belongs to the technical field of photocatalysts. The preparation method comprises the following steps: firstly, taking water, an alkali source, a copper source and a reducing agent as precursors to obtain Cu single-element square blocks through one-step precipitation; then, adding acid into a mixed solution of the Cu single-element square blocks and iodine ions, etching the Cu single-element square blocks through the acid, and growing CuI on the surface of the Cu single-element square blocks in situ through reaction between copper ions and I ‑ ions under oxidation / reduction conditions, so as to prepare the Cu / CuI catalyst. The preparation method of the Cu / CuI catalyst has the advantages of simple process and adjustable proportion, and the prepared catalyst has the advantages of small crystal grain size and large specific surface area; CO2 can be reduced into CO, CH4, C2H4 and C2H6 under light irradiation, and the electron selectivity for C2 can reach 57%, so that the Cu / CuI catalyst has the advantage of excellent photocatalytic reduction of CO2 into double-carbon products.