15 results about "Bismuth chloride" patented technology

The application discloses a first main group metal gradient doped Cs2NaBiCl6 perovskite material and a preparation method and application thereof, and belongs to the technical field of photocatalytic material for preventing and treating air pollution. The preparation method comprises the following steps: dissolving cesium chloride, sodium chloride, lithium chloride and bismuth chloride in hydrochloric acid and stirring uniformly; placing the mixture into a reaction kettle to perform hydrothermal reaction; after the reaction is completed, centrifuging, washing and drying are performed to obtain Cs2Na 1‑ x Li x BiCl6, wherein x is 0.1-0.5. The lithium-doped cesium-sodium-bismuth-chlorine double perovskite photocatalyst has stronger photocatalytic reduction capacity, and can greatly improve the activity of the lithium-doped cesium-sodium-bismuth-chlorine double perovskite in photocatalytic reduction of carbon dioxide, and the generation rate of carbon monoxide can reach 10.25 mu mol per hour ‑1 ·g ‑1 .

The application discloses a single crystal growth method of Bi-O-Se-Cl four-component semiconductor material. The chemical formula of the Bi-O-Se-Cl four-component semiconductor material is Bi 10 O 12 SeCl4, each unit cell of the crystal contains 98 atoms, has a layered structure with two layers of [Bi 12 O 12 Se2Cl], two layers of [Bi6O 10 ] and four layers of [3Cl] alternately stacked along the c-axis. The growth method is as follows: bismuth powder and selenium powder are ground and mixed, and then a solid phase reaction is caused to obtain bismuth selenide; bismuth oxide, bismuth chloride and bismuth selenide are ground and mixed to obtain mixed powder 2, which is placed at the bottom of a quartz tube, vacuumized and sealed; the sealed quartz tube is horizontally placed in a two-zone furnace, and gas phase transportation is started; the hot end and the cold end of the two-zone furnace are respectively subjected to gradient heating and heat preservation, and after the end, the two-zone furnace is cooled, and thus Bi 10 O 12 SeCl4 crystals are obtained. The Bi 10 O 12 SeCl4 crystal has a complex layered structure and is a candidate material with intrinsic low thermal conductivity, and the growth method is simple and reliable.

The application provides a composite solid-state electrolyte and a solid-state sodium metal battery and a preparation method thereof, and belongs to the field of solid-state sodium metal batteries. The preparation method of the composite solid-state electrolyte comprises the following steps: spin coating a precursor liquid on the surface of a solid-state electrolyte and drying to obtain a composite solid-state electrolyte; the precursor liquid comprises a bismuth-containing precursor liquid and / or an antimony-containing precursor liquid; the preparation method of the bismuth-containing precursor liquid / antimony-containing precursor liquid comprises the following steps: mixing a mixed solution of bismuth chloride / antimony chloride and an organic solvent with water to perform a hydrolysis reaction, so as to obtain the bismuth-containing precursor liquid / antimony-containing precursor liquid. The solid-state sodium metal battery prepared from the composite solid-state electrolyte prepared by the preparation method has good electrochemical performance and cycle stability.

The invention discloses a method for preparing 4N-grade bismuth oxychloride from a complex high-lead bismuth chloride solution, which comprises the following steps: hydrolyzing the high-lead bismuth chloride solution, adjusting the pH value to 0.8-3.0 to obtain crude bismuth oxychloride, washing the crude bismuth oxychloride by using an acid solution to obtain a solid substance, dissolving the solid substance by using a mixed acid solution of hydrochloric acid and sulfuric acid to obtain a dissolved solution and dissolved slag, and drying the dissolved solution and the dissolved slag to obtain the 4N-grade bismuth oxychloride. And carrying out deep lead removal on the dissolved solution, and hydrolyzing to obtain purified 4N-grade bismuth oxychloride. According to the invention, a specific mixed acid system composed of hydrochloric acid and sulfuric acid is innovatively introduced to dissolve crude bismuth oxychloride obtained by preliminary hydrolysis. According to the process, reverse mass transfer of bismuth and lead can be achieved, bismuth selectively enters the solution in the form of bismuth chloride, and lead is synchronously converted into lead sulfate sediment to be fixed in slag.

The invention discloses an MOF (Metal Organic Framework) capable of being used for preparing ammonia by electroreduction of a nitrate-containing solution and a preparation method, and belongs to the technical field of nano materials. Comprising the following steps: firstly, treating carbon cloth with a saturated potassium permanganate solution; then adding an organic ligand 2, 3, 6, 7, 10, 11-hexahydroxy triphenylene and cobalt acetate monohydrate into deionized water and N-methyl pyrrolidone, and carrying out ultrasonic treatment to fully disperse the solid medicine in the solution; obliquely putting the pretreated carbon cloth into the mixed solution, transferring into a reaction kettle, carrying out hydrothermal treatment, repeatedly cleaning the surface of the carbon cloth by using deionized water and absolute ethyl alcohol, and drying to obtain the MOF capable of being used for preparing ammonia by electroreduction of a nitrate-containing solution. According to the method, bismuth chloride can also be added into the organic ligand 2, 3, 6, 7, 10, 11-hexahydroxy triphenylene and cobalt acetate monohydrate to prepare Bi-doped MOF. The invention aims to provide the method for preparing the MOF which can be used for preparing the ammonia by electroreduction of the nitrate-containing solution, can be massively produced, has uniform morphology and can be used for preparing the ammonia by electroreduction of the nitrate-containing solution under a hydrothermal condition.

The application discloses a Ni-doped Cs2NaBiCl6 photocatalyst, a preparation method thereof and application of the photocatalyst in photocatalytic reduction of carbon dioxide, and belongs to the technical field of photocatalytic material for preventing and treating air pollution. The preparation method comprises the following steps: dissolving sodium chloride, bismuth chloride and nickel chloride in hydrochloric acid, and reacting under the condition of heating and stirring; adding cesium chloride, immediately generating white precipitate, and after the reaction is completed, centrifuging, washing and drying to obtain Cs2Na 1‑x Ni x BiCl6, and x is 0.1-0.5. The nickel-doped Cs2NaBiCl6 double perovskite photocatalyst has stronger photocatalytic reduction capacity, can greatly improve the activity of the nickel-doped Cs2NaBiCl6 double perovskite photocatalyst in photocatalytic reduction of carbon dioxide, and the generation rate of carbon monoxide reaches 12.71 mu mol per hour ‑1 ·g ‑1 .

The application provides a Bi2Te 2.7 Se 0.3 The application relates to a AgBiSe2 composite thermoelectric material and a preparation method thereof, and belongs to the technical field of thermoelectric material preparation. The method comprises the following steps: reacting selenium powder, silver nitrate and bismuth chloride to synthesize AgBiSe2 nanoparticles, and then mixing the AgBiSe2 nanoparticles with Bi2Te 2.7 Se 0.3 After grinding, vacuum hot-pressing sintering is carried out to obtain the Bi2Te 2.7 Se 0.3 The application introduces the nano-structured AgBiSe2 prepared by a chemical method as a second phase into a Bi2Te 2.7 Se 0.3 matrix, and the ZT value of the composite material can be obviously improved.

The invention provides a mercury-free catalyst and a preparation method and application thereof in vinyl chloride synthesis, and belongs to the technical field of catalysts.The preparation method of the catalyst comprises the steps that copper chloride, bismuth chloride, cerium chloride, phosphoric acid and N-methyl pyrrolidone are dissolved in water in proportion to obtain steeping liquor, the steeping liquor is mixed with washed coal-based activated carbon, and a mixture is obtained; and dipping under negative pressure, filtering, and drying. The mercury-free catalyst provided by the invention has excellent catalytic activity and stability, the conversion rate and selectivity of the mercury-free catalyst respectively reach 98.1% and 99.29%, the preparation difficulty is low, the cost is low, and the mercury-free catalyst has application potential in industrial production of vinyl chloride.

This invention discloses a method for preparing an S-mechanism BiOBr / BiSBr heterojunction with a shared Bi atomic layer at the interface. Using choline bromide and polyethylene glycol as raw materials, a transparent, low-melting-point eutectic is obtained by heating. Bismuth chloride pentahydrate is then added, resulting in a light yellow BiOBr precipitate. The obtained BiOBr is transferred to a ceramic boat and placed in a tube furnace purged with nitrogen. Another ceramic boat is filled with sublimed sulfur and placed upstream of the nitrogen flow. The sample is heated and sulfided at a specific heating rate. Through an in-situ anion exchange-induced strategy, an S-mechanism oxygen-vacancy BiOBr / BiSBr heterojunction nanosheet photocatalyst with a shared Bi atomic layer at the interface is obtained. This photocatalyst exhibits excellent photocatalytic activity and stability in visible light-driven photocatalytic N2 fixation, photocatalytic degradation of organic pollutants in water, and selective photocatalytic reduction of organic matter.

The invention relates to a preparation method and application of a Zn (at) Bi / BiOCl integrated zinc metal negative electrode. According to the method, the Zn (at) Bi / BiOCl integrated negative electrode is prepared in situ by carrying out replacement and hydrolysis reaction in a bismuth salt solution. The used bismuth salt comprises one or more of bismuth trifluoromethanesulfonate, bismuth nitrate and bismuth chloride, the bismuth salt is dissolved in one or a combination of more of ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, tetrahydrofuran and N, N-dimethylformamide, and the soaking time is controlled to be 30 seconds to 30 minutes. According to the prepared Zn (at) Bi / BiOCl integrated zinc metal negative electrode, the synergistic effect of BiOCl with semiconductor characteristics and a built-in electric field and zinc-philic Bi metal can be achieved. The synergistic effect effectively adjusts the uniform distribution of an interface electric field and an ion field, and reduces the potential barrier of a hydrogen evolution reaction at the same time. Through the adjustment, not only is the hydrogen evolution potential barrier increased, but also the zinc nucleation potential barrier is reduced, and the interface electric field is homogenized, so that the hydrogen evolution reaction, the side reaction and the formation of zinc dendrites are effectively inhibited. Therefore, under the multiple effects of the Zn (at) Bi / BiOCl integrated zinc negative electrode, the long cycle performance, hydrogen evolution reaction inhibition and corrosion resistance of the water-based zinc ion battery / capacitor are remarkably improved.

The application belongs to the technical field of photocatalytic materials, and particularly relates to a copper-doped Cs2NaBiCl6 photocatalyst, a preparation method thereof and application thereof in photocatalytic reduction of carbon dioxide. The preparation method comprises the following steps: dissolving cesium chloride, bismuth chloride, sodium chloride and copper chloride in dimethyl sulfoxide to obtain a precursor solution; and then injecting the mixed solution into isopropyl alcohol to obtain the copper-doped Cs2NaBiCl6 photocatalyst by using an anti-solvent crystallization method. Compared with a pure-phase substrate without doping, the copper-doping modification can significantly improve the catalytic activity of the Cs2NaBiCl6 photocatalyst in photocatalytic reduction of carbon dioxide, and the carbon monoxide generation rate reaches 18.06 mu mol* g ‑1 •h ‑1 .

The application discloses a kind of nickel-doped Cs2AgBiCl6 Composite material and its preparation method and application.Belongs to photocatalytic material technical field, in the nickel-doped Cs2AgBiCl6 Composite material, 10% by mole percentage, contain 50% nickel chloride.Preparation method includes: cesium chloride, bismuth chloride, silver chloride and nickel chloride are placed in agate mortar and mixed.Mix the mixture, then continuously grind at room temperature, air environment, then put into muffle furnace and calcine, obtain target product.Compared with existing photocatalyst, the nickel-doped Cs2AgBiCl6 Composite material photocatalyst of the application improves the photocatalytic CO2 photoreduction efficiency, wherein doping can modify semiconductor photocatalytic material, to accelerate the separation and transfer of carrier, to improve the purpose of photocatalytic activity.

The invention discloses a large-scale treatment method for an Al-Bi-Sn alloy hydrolysis byproduct. The large-scale treatment method comprises the following steps: S1, crushing the byproduct into fine particles; s2, feeding crushed by-products into an alkaline leaching reaction kettle for alkaline leaching treatment; s3, centrifugally separating the filtrate and the filter residue; s4, the filter residues are fed into an enamel reaction kettle for acid leaching treatment, and bismuth elements and tin elements in the filter residues are converted into bismuth chloride and tin chloride; s5, aluminum powder is added into the solution obtained after acid leaching for a replacement reaction, and a spongy bismuth and tin mixture is obtained; s6, the mixture is heated, and liquid tin and solid bismuth are obtained; s7, performing high-pressure dissolution reaction on the filtrate; s8, performing seed crystal decomposition on the filtrate, and crystallizing the sodium aluminate solution to separate out aluminum hydroxide; s9, calcining the aluminum hydroxide to convert the aluminum hydroxide into alpha-type aluminum oxide; the method has the advantages that comprehensive and efficient recovery of aluminum, bismuth and tin in byproducts can be achieved, comprehensive power consumption is low, and resource waste is reduced.

The application belongs to the technical field of aqueous zinc ion batteries, and discloses a preparation method of a graphene oxide / bismuth selenide composite material and application of the graphene oxide / bismuth selenide composite material in an aqueous zinc ion battery. The composite material is synthesized through a simple secondary hydrothermal method. First, bismuth selenide is synthesized by taking bismuth chloride and selenium powder as raw materials, and then graphene oxide is added to perform secondary hydrothermal treatment, so that bismuth selenide uniformly coated with reduced graphene oxide (Bi2Se3@rGO) is obtained. The synthesis process is simple, environment-friendly and low in production cost. Compared with the prior art, the conductivity of bismuth selenide is increased by graphene coating, and the capacity attenuation caused by volume change is relieved. The prepared graphene oxide / bismuth selenide composite material is used as a positive electrode to assemble a battery, and the battery exhibits excellent specific capacity and cycle stability.