22 results about "Lead chloride" patented technology

The application belongs to the technical field of ion batteries, and particularly relates to a lead-carbon composite material and a preparation method and application thereof. The preparation method comprises the following steps: grinding and tabletting a lead source and a carbon source, and roasting the tabletted tablet to obtain the lead-carbon composite material; the lead source comprises at least one of lead citrate, lead acetate, lead chloride and lead oxalate; and the carbon source comprises at least one of polyvinylpyrrolidone, carboxymethyl cellulose, glucose and sucrose. The lead-carbon composite material has a three-dimensional porous structure formed by metal lead particles embedded in a carbon skeleton, and the carbon skeleton can effectively alleviate the volume expansion generated in the alloying process of metal lead and metal sodium in the charging and discharging process, so as to improve the conductivity and electrochemical performance of the material.

The invention belongs to the field of perovskite devices, and particularly discloses a bromine-chlorine mixed blue-light perovskite thin film, a preparation method and a perovskite LED device. The bromine-chlorine mixed blue-light perovskite thin film is prepared from the following raw materials: cesium halide, lead bromide, lead chloride and alkaline earth metal bromide; the alkaline earth metal bromide comprises at least one of calcium bromide, strontium bromide and barium bromide; the ratio of the mole number of the alkaline earth metal bromide to the total mole number of Pb in lead bromide and lead chloride is not greater than 0.5. The bromine and chlorine mixed blue light perovskite is doped by adopting the alkaline earth metal bromide with a low-solubility perovskite phase, and the molar ratio of the doping amount of the alkaline earth metal bromide is not higher than 0.5, so that the nonuniform bromine and chlorine distribution of the blue light perovskite thin film in the film forming process is improved, the halogen separation under an electric field is inhibited, and the spectral stability is improved; by directly doping in the precursor, the preparation process is simple, and the method is suitable for large-scale industrial production.

This invention discloses a room-temperature phase pyroelectric material and its preparation method, relating to the field of pyroelectric material technology, with the chemical formula C4H. 14 N₂OPbCl₄ is prepared as follows: 2-Dimethylaminoethylamine is cooled and stirred in an ice-water bath, then hydrogen peroxide solution is added dropwise while stirring. After the reaction, the resulting reaction solution is vacuum dried to obtain the nitrogen oxide of 2-dimethylaminoethylamine. The nitrogen oxide of 2-dimethylaminoethylamine and lead chloride are added to a concentrated hydrochloric acid solution, heated in an oil bath, and stirred to obtain a pyroelectric material. The pyroelectric material of this invention has a perovskite structure and undergoes a reversible phase transition reaction at a phase transition temperature of 27°C. During the phase transition, a current is generated at the polar axis of the crystal. The phase transition temperature at room temperature allows the pyroelectric material to operate within a relatively stable temperature range, providing reliable energy collection performance and showing great application value in waste heat utilization, self-sustaining systems, and other fields.

The application discloses a method for preparing a heterojunction perovskite photodetector, comprising the following steps: preparing an electron transport layer; dissolving lead iodide and lead chloride in a mixed solution of dimethylformamide, N-methylformamide and N-methylpyrrolidone to obtain a precursor solution; in an air atmosphere, spin-coating the precursor solution onto the electron transport layer, immediately immersing into an anti-solvent after uniform spreading, and obtaining a PbI2-PbCl2 film after crystallization; spin-coating a methylammonium iodide solution onto the PbI2-PbCl2 film, and obtaining a perovskite film after vacuum annealing; spin-coating a long-chain ligand solution onto the three-dimensional perovskite film, vacuum annealing, and obtaining a perovskite heterojunction film; sequentially preparing a hole transport layer, a hole blocking layer and an anode on the perovskite heterojunction film to obtain the heterojunction perovskite photodetector. The method has the advantages that the prepared photodetector has high external quantum efficiency and high detection rate, and the preparation is simple.

This invention belongs to the field of solid waste recycling, specifically relating to a method for leaching and preparing hydroxyl chloride lead ore from steel metallurgical dust washing slag. The method involves leaching hydroxyl chloride lead ore-containing steel metallurgical dust washing slag in a composite leaching solution, converting the hydroxyl chloride lead ore into water-soluble PbCl. x y‑ The complex was then subjected to solid-liquid separation to obtain PbCl-rich material. x y‑ Leachate and iron slag of the complex; PbCl x y‑ In the above, x is 3 or 4, and y is 1 or 2; the composite leachate is an aqueous solution containing dissolved acid and auxiliaries; the acid is at least one of hydrochloric acid and acetic acid; the auxiliaries are water-soluble salts of at least one cation selected from Na, K, Ca, and Fe; an alkaline precipitant is added to the leachate to remove PbCl... x y‑ The complex is conditioned and precipitated, with the pH of the system during the conditioning and precipitation process being 6-10; subsequently, solid-liquid separation is performed to obtain lead chloride ore. This invention can selectively remove lead enriched in steel metallurgical dust washing slag, reducing its harm to the steel smelting process after return to sintering; at the same time, it realizes the resource recovery of lead.

The present application belongs to the technical field of waste lead acid battery resource and lead chloride crystal preparation, and discloses a method for preparing lead chloride crystal from waste lead paste by a short wet process, which specifically comprises the following steps: S1: stirring and reacting the waste lead paste in a carbonate solution to obtain desulfurized lead paste; S2: using an HCl-NaCl mixed solution as a leaching agent to leach the desulfurized lead paste to obtain a leaching solution; and S3: recrystallizing to obtain lead chloride crystals. The present application improves the overall process design of the preparation method, first uses a carbonate solution to desulfurize the waste lead paste, then uses an HCl-NaCl mixed solution as a leaching agent to leach the desulfurized lead paste, and finally recrystallizes to obtain high-purity lead chloride crystals, effectively solving the technical problems of long process steps, large reagent input, and low conversion rate of lead chloride in the prior art.

The application relates to a lead sulfide quantum dot preparation method, which specifically comprises the following steps: rapidly injecting a ZnS quantum dot solution into a mixed solution of lead chloride and oleylamine to make the solution nucleate; after maintaining for a certain time, rapidly injecting an amine solution of zinc dithiocarbamate; and controlling the size of the synthesized PbS quantum dots by controlling the temperature and the concentration of the sulfur source. The application provides a single precursor zinc dithiocarbamate to replace the ZnS quantum dots as the growth sulfur source, so that the time is saved, and the complex steps of synthesizing the ZnS quantum dots are omitted.

The invention relates to the technical field of flotation, in particular to a flotation reagent and method for recycling copper components in copper slag. The invention provides a flotation reagent for recycling copper components in copper slag. The flotation reagent comprises a composite activating agent and a composite collecting agent. The composite activating agent is prepared from 2, 5-dimercaptothiadiazole and a modifier I; the first modifier is selected from at least one of copper sulfate, copper chloride, copper nitrate, lead nitrate and lead chloride; the composite collecting agent is composed of xanthate and a second modifier. The modifier II is selected from at least one of black powder, thionocarbamate compounds, fatty acid compounds and hydroximic acid. According to the invention, the composite activator highly matched with the copper oxide component in the copper slag is constructed, so that the active sites on the surface of the copper oxide are fully exposed and directionally strengthened; and meanwhile, a composite collecting agent with ultrahigh selectivity on the copper component is introduced, so that copper oxide and copper sulfide are efficiently and synchronously collected in the same process, and deep enrichment and comprehensive recovery of the copper component in the copper slag are achieved.

The application relates to a lead sulfide quantum dot preparation method, which specifically comprises the following steps: rapidly injecting an amine solution of activated zinc dithiocarbamate into a mixed solution of lead chloride and oleylamine to make it nucleate and grow, and adjusting the size of the synthesized PbS quantum dots by adjusting temperature and growth time, etc. A single precursor zinc dithiocarbamate completely replaces ZnS quantum dots as a nucleation and growth sulfur source, does not need to be added dropwise, saves time, omits the complex steps of synthesizing ZnS quantum dots, and can be stably kept at a certain size for a long time without ripening.

The invention relates to the technical field of bismuth refining, and discloses a method for removing lead in bismuth refining, which comprises the following steps: introducing chlorine gas into a bismuth solution in a molten state to enable impurity lead in the bismuth solution to generate lead chloride, and separating the lead chloride from the bismuth solution; in the process of introducing chlorine, air or inert gas is intermittently introduced to stir the bismuth liquid, the interval time is 4-8 h, the continuous introduction time of the air or inert gas is 0.5 h, and the introduction pressure is 2-3 Mpa. The invention further discloses a lead removal device for bismuth refining, and the lead removal device is used for implementing the method. According to the method, lead in the bismuth liquid can be removed, the reaction time can be shortened, the reaction rate can be increased, and the content of lead in the bismuth liquid can be reduced to 10 ppm.

The invention discloses a rare earth smelting lead slag treatment process based on ferric trichloride regeneration cycle, which comprises the following steps: by taking associated ferric iron in rare earth smelting feed liquid as an initial oxidant source, obtaining a 0.6-0.8 mol / L ferric chloride solution through N235 non-saponification extraction-clear water reverse extraction; the method comprises the following steps: performing size mixing on lead slag generated by vulcanizing and removing lead from rare earth feed liquid by using the ferric chloride solution, adding the ferric chloride solution according to 2-3 times of the amount of sulfide in the lead slag, and oxidizing for 1-2 hours; after oxidation, supernate absorbs a rare earth smelting byproduct chlorine through a spray tower, ferrous chloride is regenerated into ferric iron, and the ferric iron is extracted, enriched and recycled through N235 to be used as an oxidizing agent; leaching the oxidized lead slag with hydrochloric acid to recover rare earth, adding 8-16 times by volume of water into the leached slag, heating to 90-110 DEG C by steam to dissolve lead chloride, subsequently cooling and crystallizing or adding calcium hydroxide to adjust the pH value to 7-9 to realize lead recycling, acidifying mother liquor, and then returning to dissolve lead chloride; according to the method, no additional oxidizing auxiliary material needs to be added, hydrogen sulfide is prevented from being generated during acid leaching, the chlorine treatment cost is reduced, and rare earth recovery and lead product high value are synchronously achieved.

The application belongs to the field of perovskite devices, and specifically discloses a bromine-chlorine mixed blue light perovskite film, a preparation method thereof and a perovskite LED device. The preparation raw materials of the bromine-chlorine mixed blue light perovskite film include cesium halide, lead bromide, lead chloride and an alkaline earth metal bromide; the alkaline earth metal bromide includes at least one of calcium bromide, strontium bromide and barium bromide; and the ratio of the mole number of the alkaline earth metal bromide to the total mole number of Pb in the lead bromide and the lead chloride is not greater than 0.5. The alkaline earth metal bromide with a perovskite phase of low solubility is used to dope the bromine-chlorine mixed blue light perovskite, and the mole ratio of the doping amount of the alkaline earth metal bromide is not higher than 0.5, so that the uneven distribution of bromine and chlorine in the blue light perovskite film during the film forming process is improved, the halogen separation under the electric field is inhibited, and the spectral stability is improved; the doping is directly performed in the precursor, the preparation process is simple, and the method is suitable for large-scale industrial production.

This invention discloses a method for preparing a blue light-emitting thin film, the blue light-emitting thin film, and a light-emitting device. The method involves dissolving a mixture of cesium bromide, lead bromide, lead chloride, and an organic ligand in dimethyl sulfoxide solvent to obtain a precursor solution. An additional ligand is added to the precursor solution to obtain a perovskite precursor solution. An additive is added to the perovskite precursor solution, and the mixture is stirred for a predetermined first time to obtain a homogeneous solution. The homogeneous solution is then spin-coated in a nitrogen-filled glove box, with an antisolvent added during the spin-coating process to obtain a raw thin film. The raw thin film is annealed and then vacuum-dried to obtain a blue light-emitting perovskite thin film. The above method uses amine salts as organic ligands and small-molecule amine salts as additional ligands, ultimately resulting in a significant improvement in the photoluminescence quantum efficiency, maximum external quantum efficiency, and maximum power efficiency of the prepared blue light-emitting perovskite thin film, as well as achieving high maximum brightness and a stable electroluminescence spectrum.

The invention provides a modified perovskite light absorption layer and a preparation method and application thereof, and the preparation method comprises the following steps: (1) carrying out the one-step evaporation treatment on the surface of a substrate through lead iodide, cesium bromide and lead chloride, and obtaining a first evaporation layer; (2) carrying out two-step evaporation treatment on the surface of the first evaporation layer by using lead iodide, cesium bromide and lead chloride to obtain a second evaporation layer; and (3) carrying out three-step evaporation treatment on the surface of the second evaporation layer by using organic cation amine salt to obtain an organic cation amine salt layer, and carrying out annealing treatment on the obtained material to obtain the modified perovskite light absorption layer, wherein the evaporation rate of the one-step evaporation treatment of lead chloride is gt; the evaporation rate of the two-step evaporation treatment of lead chloride is increased. According to the method for preparing the modified perovskite light absorption layer, the compactness of the thin film can be adjusted, the high perovskite phase conversion degree is promoted, and the quality of the perovskite light absorption layer is improved.

The invention discloses an efficient perovskite quantum dot with a quantum cutting effect and a preparation method thereof. The preparation method comprises the following steps: mixing cesium carbonate, oleic acid and 1-octadecene for reaction to obtain a solution A; mixing and reacting lead chloride, ytterbium chloride, oleic acid, oleylamine and 1-octadecene to obtain a solution B; injecting the solution A into the solution B, reacting, cooling, centrifugally precipitating, and extracting to obtain perovskite quantum dot supernate; mixing metal chloride and absolute ethyl alcohol, dropwise adding the mixture into the supernate, and performing ultrasonic treatment to obtain the efficient perovskite quantum dots with the quantum cutting effect. The method is simple and convenient to operate, does not need harsh reaction conditions, and can remarkably improve the preparation efficiency and reduce the preparation cost; according to the perovskite quantum dot, through the synergistic effect of metal ion doping and the quantum cutting effect, effective passivation of a defect state is achieved on the premise that quantum cutting near-infrared light emission is completely kept, non-radiative recombination is reduced, the overall fluorescence quantum yield is increased, and the comprehensive fluorescence performance is excellent.

The invention discloses a method for deeply purifying and removing impurities before flue gas desulfurization of an industrial furnace, which comprises the following steps: introducing sulfur-containing flue gas subjected to dust removal treatment into a wet washing tower; washing the sulfur-containing flue gas with a soluble metal salt solution to form a dilute sulfuric acid solution containing metal salt as an absorption solution; the obtained absorption liquid is in contact with the treated flue gas to be hydrolyzed, arsenic chloride, hydrogen chloride and lead chloride in the flue gas are converted into arsenate, lead ions and chloride ion soluble salt, the arsenate and metal cations in the absorption liquid are subjected to insoluble arsenate precipitation, and the treated flue gas is the purified and impurity-removed high-sulfur flue gas. By means of the method, arsenic, volatile inorganic matter and other pollutants in the sulfur-containing flue gas can be effectively removed and prevented from entering a subsequent desulfurization system, and the concentration of arsenic, chlorine and other pollutants in desulfurization products is effectively reduced.

The application discloses a kind of photocatalytic material and preparation method thereof, comprising the following steps: cesium chloride, lead chloride and manganese chloride are ground and mixed according to certain proportion, and perovskite quantum dot precursor is obtained;Perovskite quantum dot precursor and molecular sieve carrier are ground and mixed according to certain proportion, and mixture material is obtained;After calcining in inert atmosphere, the photocatalytic material of the application is obtained after curing;The chemical general formula of the photocatalytic material of the application is CsPb 1‑x Mn x Cl3@LTA (x=0, 0.2, 0.4, 0.6, 0.8);The photocatalytic material prepared by the method has the characteristics of simple process, does not contain any organic solvent, is environment-friendly, is convenient for large-scale synthesis, has good stability and excellent photocatalytic performance, and has good industrialization application prospect.

The method comprises the following steps: dissolving lead chloride, manganese chloride, hydrochloric acid and polyether amine D400 in N, N-dimethylformamide to form a polar precursor solution, mixing the polar precursor solution with an oleic acid / n-octane weak polar solvent containing cesium acetate, stirring for 1 hour at 20-30 DEG C and 400 r / min, centrifuging for 3-5 minutes at 8000-10000 r / min, and drying to obtain the manganese-doped flexible lead halide perovskite material. And washing with n-hexane for three times. The material is composed of an amorphous perovskite network and embedded nanocrystals with the average diameter of 6.8 nanometers, and has polymer-like viscoelasticity and 3D printing capacity; the photoluminescence quantum yield exceeds 50%, and the Stokes shift is gt; the X-ray excitation light yield is about 8.07 * 10 < 4 > photons / megaelectron volts, and the imaging resolution is 9.0 line pairs / mm. The material is still excellent in performance after being subjected to 300% stretching, 5000 times of bending circulation, air storage for nearly two months and 5 minutes of self-healing, and is suitable for flexible electronic devices, wearable X-ray detection equipment and complex three-dimensional common imaging systems.

The invention relates to a method for treating lead sulfate slag through a base hydrogen direct reduction process. The method comprises the following process steps that (1) the lead slag enters a pretreatment drying system through a feeding system to be dried and then is put into a hydrogen reduction smelting reaction furnace; (2) valuable components such as lead sulfate and lead chloride in the lead sulfate are directly reduced into crude lead in one step; (3) adding coke and caustic soda flakes into the crude lead, and further treating to obtain products A and B; (4) after the product A passes through an ingot casting system, preparing a lead ingot containing more than 99% of lead for sale; (5) the obtained product B is high-zinc alkaline residues, and part of the high-zinc alkaline residues enter a rotary kiln or a wastewater treatment system to replace caustic soda flakes to adjust the PH value; and the other part of high-zinc alkaline residues enter a second-section vacuum distillation furnace and are continuously treated, and zinc ingots containing more than 99% of zinc are generated from the obtained product through an ingot casting system and are sold. Compared with other methods or equipment, the method is more environmentally friendly and more energy-saving, cyclic utilization is facilitated, and the utilization efficiency is improved.

The invention belongs to the field of metal material processing, and particularly relates to a method for recovering metallurgical dust containing lead and alkali metal elements, which comprises the following steps of: leaching the metallurgical dust containing lead and alkali metal elements and a tempering agent in water; alkali metal elements in the metallurgical dust are dissolved out, and the lead element is converted into a hydroxamorphite precipitate; then carrying out solid-liquid separation to obtain a water leaching solution enriched with alkali metal and water leaching residues containing the hydroxylkadamite; the conditioning agent comprises an alkaline earth metal-based material and / or an alkali metal-based material, and the alkaline earth metal-based material is at least one of oxide, hydroxide, chloride and nitrate of alkaline earth metal; the alkali metal-based material is at least one of carbonate, bicarbonate and carboxylate of alkali metal. According to the method, lead in metallurgical dust can be selectively converted into a lead oxychloride mineral phase, accompanying precipitation of potassium is reduced, deep extraction of alkali metal is achieved, and the recovery rate of alkali metal elements is increased.

The invention relates to the technical field of zinc hydrometallurgy, and discloses a method for analyzing Zn, Ag, In and Pb in zinc smelting wet purification slag, which comprises the following steps of: firstly, carrying out stepped digestion on a sample by using hydrochloric acid, nitric acid and perchloric acid to completely decompose materials; then, dividing the test solution into two parts: directly metering the volume of one part, and directly measuring Zn, In and Pb by adopting an inductively coupled plasma emission spectrometry; the other part of silver ions are converted into an ammoniacal medium by adding ammonia water, so that the silver ions form stable silver-ammonia complex ions, the interference of lead chloride coprecipitation on silver determination is effectively overcome, and after dry filtration, ICP-OES is used for determining Ag. According to the method, optimized chemical pretreatment and instrument detection conditions are combined, so that the problem of interference of a complex matrix is solved, the accuracy of silver determination is particularly ensured, rapid, accurate and simultaneous determination of four valuable elements in the wet purification slag is realized, and a reliable analysis means is provided for production process optimization and metal recovery.

The invention belongs to the field of perovskite materials, and discloses high-purity lead chloride and a production method thereof. The production method comprises the following steps: heating a lead acetate solution, dropwise adding a diluted hydrochloric acid solution into the lead acetate solution, then adding a concentrated hydrochloric acid solution to adjust the pH value to 0.5-1.0, carrying out a heat preservation reaction, then cooling to room temperature, and then sequentially carrying out solid-liquid separation, washing and drying to obtain solid particles, namely the high-purity lead chloride. By accurately regulating and controlling the core reaction condition, the problems of uneven granularity, irregular morphology and insufficient purity of the product in the prior art are effectively solved, and a multiple optimization effect is realized.