63 results about "Bismuth iodide" patented technology

The invention relates to an all-vanadium flow battery double-function negative electrode, wherein a carbon material is adopted as a substrate, a Bi-containing electro-catalyst is modified on the surface of the substrate, the Bi-containing electro-catalyst is one or more than two selected from a Bi elementary substance, Bi2O3, a Bi halide and a Bi metal salt, the Bi halide is bismuth fluoride, bismuth trichloride, bismuth bromide, or bismuth iodide, and the Bi metal salt is bismuth sulfate, bismuth nitrate, bismuth phosphate, bismuth formate or bismuth acetate. According to the present invention, the electrode is suitable for the negative electrode of the all-vanadium flow battery, the electrocatalysis activity and the electrochemical reversibility of the electrode material on the V<2+> / V<3+> oxidation reduction reaction can be substantially improved, and the charge transfer resistance can be reduced; and the high hydrogen evolution overpotential is provided so as to inhibit the occurrence of the hydrogen evolution reaction and prolong the service life of the battery.

The invention discloses a preparation method of a metal oxide SnO2 and halide perovskite quantum dot Cs3Bi2I9 heterojunction visible-light-driven photocatalyst, which comprises the following steps of (1) preparing a tin tetrachloride pentahydrate solution and a sodium hydroxide solution, dropwise adding the sodium hydroxide solution into the tin tetrachloride pentahydrate solution, stirring, dropwise adding absolute ethyl alcohol, stirring, heating, reacting, then washing, drying and grinding, (2) adding cesium iodide and bismuth iodide into N, N-dimethylformamide, and performing ultrasonic treatment to obtain a precursor solution, then adding the solution into toluene for reaction, and then centrifuging, drying and grinding, and (3) adding the two kinds of powder into isopropanol liquid for ultrasonic treatment, then stirring and centrifuging, drying and grinding to obtain the heterojunction visible-light-driven photocatalyst. The method for preparing the heterojunction photocatalyst is easy to operate, mild in reaction condition, low in equipment requirement and free of a complex synthesis device, and the catalyst is applied to nitrogen oxide degradation and can remarkably improve the nitrogen oxide removal efficiency.

The invention discloses a metal layer molten pool heat transfer characteristic simulation material, and a preparation method and application thereof. The metal layer molten pool heat transfer characteristic simulation material comprises metal bismuth and bismuth iodide, and the Pr of the metal layer molten pool heat transfer characteristic simulation material under the condition of 500 DEG C is 0.08-0.12. The preparation process of the metal layer molten pool heat transfer characteristic simulation material comprises the following steps: preparing a bismuth iodide molten salt; heating the metal bismuth until the metal bismuth is completely molten, and continuously heating to a temperature T; slowly adding the prepared bismuth iodide molten salt into the molten metal bismuth for multiple times at the temperature T; and completely melting the bismuth iodide crystals on the surface layer of the metal bismuth to obtain the metal layer molten pool heat transfer characteristic simulation material. The Pr number of the metal layer molten pool heat transfer characteristic simulation material provided by the invention in a working state is 0.08-0.12, is closer to the Prandtl number of a real material; therefore, the real material of the metal layer can be simulated more accurately and reliably, the heat transfer characteristic of the metal layer of the metal layer molten pool in the reactor prototype lower end socket can be reflected more accurately, the uncertainty of the heat transfer relational expression obtained through experiments is effectively reduced, and data support is provided for formulation and implementation of a melt in-reactor retention strategy.

The invention provides an asymmetric bismuth catalysis system, a preparation method and an application thereof, relates to the technical field of asymmetric catalysis and provides an asymmetric bismuth catalysis system. By adoption of the asymmetric bismuth catalysis system, the problem of high Substrate specificity of the bismuth catalysis system is solved. The asymmetric bismuth catalysis systemcomprises a metal activity center and a chiral ligand, wherein the metal activity center is selected from one or more of bismuth acetate, bismuth hydroxide, bismuth bromide or bismuth iodide; the chiral ligand is selected from chiral phosphoric acid. The asymmetric bismuth catalysis system is used for catalyzing multiple types of asymmetric transformations such as asymmetric allylation of ketoneand imine, asymmetric allylation of oxonium ions and asymmetric reaction of imine and phenolic substrates and the like.

The invention discloses a method for preparing a molybdenum-doped bismuth vanadate photoelectrode modified by cobalt phosphide. First, a bismuth iodide oxide photoelectrode is prepared on the surface of a conductive glass by a deposition method, and a vanadium source and molybdenum are added dropwise on the bismuth iodide oxide photoelectrode. source solution, after annealing and cleaning, the molybdenum-doped bismuth vanadate photoelectrode was obtained, and then in the three-electrode system, cobalt phosphide was deposited on the surface of the molybdenum-doped bismuth vanadate photoelectrode through photo-assisted electrodeposition, and the new bismuth vanadate photoelectrode was obtained. The invention also discloses the application of the composite bismuth molybdovanadate photoelectrode in photoelectric catalytic water decomposition. The photoelectrode prepared by the present invention is used for photoelectrocatalytic water splitting to produce hydrogen. Doping molybdenum can effectively increase the concentration of carriers and increase the photocurrent, while electrodeposition of cobalt and phosphorus can effectively delay the recombination loss in the photoelectrode and increase the The lifetime of the photogenerated carriers can promote the oxygen evolution reaction on the surface of the photoelectrode, thereby improving the solar-to-hydrogen conversion efficiency of the semiconductor photoelectrode.

A dual-functional negative electrode for an all-vanadium redox flow battery, the dual-functional negative electrode is based on a carbon material, and its surface is modified with a Bi-containing electrocatalyst, and the Bi-containing electrocatalyst is Bi simple substance, Bi2O3, Bi halide or Bi One or more than two kinds of metal salts; Bi halides are bismuth fluoride, bismuth chloride, bismuth bromide or bismuth iodide; Bi metal salts are bismuth sulfate, bismuth nitrate, bismuth phosphate, bismuth formate or bismuth acetate . This electrode is suitable for the negative electrode of the all-vanadium redox flow battery, which can greatly improve the electrocatalytic activity and electrochemical reversibility of the electrode material for the V2+ / V3+ redox reaction, reduce the charge transfer resistance; it also has a high hydrogen evolution overpotential, It can inhibit the occurrence of hydrogen evolution reaction and prolong the working life of the battery.

The invention discloses a method for preparing an amide compound, which comprises the steps of configuration of reaction system. Methyl ketone, amine, catalyst, an oxidizing agent and solvent are use, wherein the general formula of the methyl ketone is RCOCH3, and R is selected from one kind of C6-C14 aryl group, C2-C8 alkenyl group, and five-or six-membered heterocyclic group; the amine is primary amine; the catalyst is selected from one kind of potassium iodide, iodine, tetramethyl ammonium iodide, tetrabutyl ammonium iodide, tetrahexyl ammonium iodide, bismuth iodide, lithium iodide, phenyl trimethyl ammonium iodide, benzyl trimethyl ammonium iodide or sodium iodide; the oxidizing agent is tert-butyl hydroperoxide; the solvent is selected from one kind of water, dichloromethane, ethyl acetate, toluene, 1,2-dichloroethane, 1,1,1-trichloroethane, acetonitrile, and isopropanol. The methyl ketone, the catalyst and the amine are added into the reaction system under the temperature of 0 DEG C and stirred for 5 minutes, and then the oxidizing agent is added to react for 2-48 hours to obtain the amide compound. The method provided by the invention is green, moderate, high in selectivity and wide in application range.

The present invention relates to the TLC identification method of eucommia ulmoides and preparations containing eucommia and the application of bismuth potassium iodide solution. The TLC identification method of eucommia ulmoides comprises the following steps: (1) making the test sample and the standard product of eucommia ulmoides into test samples respectively solution and contrast solution; (2) need testing solution and contrast solution are spotted respectively on the thin-layer plate, develop with developing agent; (3) thin-layer plate is taken out after developing, dry, and spray chromogenic agent bismuth iodide Potassium solution, air-dried or oven-dried, and placed until the spots develop clear color, so as to realize TLC identification of Eucommia ulmoides. The bismuth potassium iodide solution selected in the present invention is particularly suitable for color development of the eucommia medicinal material and the eucommia-containing preparation, has the advantages of good reproducibility, strong specificity, simplicity and practicality, and can effectively control the quality of the eucommia medicinal material and the eucommia-containing preparation.

The invention relates to a preparation method of a Z-form bismuth-based photocatalyst, and belongs to the technical field of nanomaterials. By adding the bismuth salt and the iodine source into the solvent to dissolve completely or to disperse uniformly, a reaction solution containing the precursor of bismuth iodide is obtained after sufficient reaction; the composite phase substance and the reducing agent are added to the reaction solution prepared in step (1) to react , obtain a reaction solution with a reducing chemical atmosphere, containing bismuth iodide-composite phase precursor; heat the reaction solution obtained in step (2) with a solvent, and separate and dry the reaction solution after the solvent heat treatment to obtain the catalyst. . The catalyst can retain a high redox potential on the basis of effectively separating electron-hole pairs; compared with the heterojunction structure obtained without adding a reducing agent, it has the ability to complete the photocatalytic degradation of organic compounds such as rhodamine B faster. Effect.

The invention relates to synthesis of a bismuth iodine hybrid material and application to preparation of a BiOI nano-sheet, and aims to synthesize the bismuth iodine hybrid material, wherein the bismuth iodine hybrid material can be directly applied to hydrolysis to prepare the BiOI nano-sheet. A bismuth iodine based hybrid (Habtz)BiI4 is prepared by taking bismuth iodide and 2-aminobenzothiazoleas reaction raw materials and taking mixed liquid of ethanol and hydroiodic acid as a reactant and a solvent and under the solvothermal condition, wherein the abtz is 2-aminobenzothiazole. The bismuthiodine hybrid material is simple to prepare, the raw materials are low in price and the yield is high. The hybrid material serving as a precursor can be hydrolyzed rapidly without adding other reaction raw materials in distilled water and without adjusting the pH value of the reaction, so that simple and efficient preparation of the BiOI nano-sheet is realized.

The invention belongs to the technical field of environmental protection functional materials, and specifically relates to a novel bismuth halide salt, which is a compound composed of hexaiodobismuth anion and benzylpyridinium cation. The preparation method comprises the following steps: taking a certain amount of benzyl bromide and pyridine, Add an appropriate amount of solvent to mix and dissolve, stir and reflux, then evaporate and concentrate, and then wash with ether to obtain benzylpyridinium bromide; take BiI 3 Dissolve in an appropriate amount of concentrated iodic acid, take a certain amount of benzylpyridinium bromide salt and dissolve it in an appropriate amount of solvent, mix and stir the two solutions to reflux to obtain a clear filtrate, and freeze and crystallize to obtain a new type of bismuth iodide salt. The novel bismuth halide of the invention emits strong orange-red light under the irradiation of 365nm ultraviolet light, rapidly degrades rhodamine B and methyl orange under visible light, and has good cycle degradation efficiency. The invention also provides a preparation method of the novel bismuth iodide salt, the method has high yield, saves cost, is easy to operate, and is beneficial to industrialized production.

The invention discloses synthesis of a bismuth iodine based inorganic-organic hybrid material and an application of the hybrid material in selective color fading of rhodamine B. The purpose of the invention is to synthesize the inorganic-organic hybrid material (Habtz)BiI4 which can conveniently, quickly, efficiently and selectively fade color of the rhodamine B, wherein abtz represents 2-aminobenzothiazole. Bismuth iodide, 2-aminobenzothiazole, ethanol and hydroiodic acid can be selected as reaction raw materials, and a single crystal of the compound (Habtz)BiI4 is obtained under the solvothermal synthesis condition. The (Habtz)BiI4 disclosed by the invention has excellent properties, and can be used for chemical selective treatment of the rhodamine B in a dye waste liquid without any energy provided by the outside.