86 results about "Ammonium iodide" patented technology

Disclosed in the present invention is a method for in-situ NH4I-assisted preparation of CsPbI3 colloidal nanoplateles, comprising the following steps: S1. respectively preparing a lead iodide precursor solution, an ammonium iodide precursor solution, and a cesium oleate precursor solution; and S2. mixing the lead iodide precursor solution with the ammonium iodide precursor solution under stirring, adding the cesium oleate precursor solution for reaction to obtain a nanoplatele stock solution, and purifying and separating the nanoplatele stock solution to obtain CsPbI3 nanoplateles. In the present invention, in the method for the in-situ NH4I-assisted preparation of CsPbI3 colloidal nanoplateles, NH4I is used for in-situ replication synthesis of the CsPbI3 nanoplateles, the regulation of the growth kinetics of a system is achieved, the reaction process is more controllable, and the synthesized nanoplateles have a narrower peak width at half height, and a more uniform phase distribution, meeting requirements of light emitting in a red light range.

The invention belongs to the field of chemical reagent moisture detection, and particularly relates to a coulometry Karl Fischer reagent for aldehyde ketone moisture detection and a preparation method of the coulometry Karl Fischer reagent. The coulometry Karl Fischer reagent for aldehyde ketone moisture detection is prepared from the following components in parts by weight: 1 to 15 percent of imidazole, 1 to 15 percent of 2-methylimidazole, 25 to 70 percent of ethylene glycol monomethyl ether, 5 to 30 percent of trichloromethane, 2 to 30 percent of trifluoroethanol, 2 to 10 percent of sulfur dioxide, 1 to 10 percent of methyl iodide, 0.1 to 5 percent of tetrabutylammonium iodide and 0.1 to 5 percent of iodine. The method does not contain hydroxyl compounds, effectively inhibits the generation of side reactions in detection, ensures the detection accuracy, and improves the product stability and effectively shortens the instrument equilibrium time by adding iodomethane and tetrabutylammonium iodide.

To provide a new method for producing a fluorinated organic compound in which removal or separation of an auxiliary is easy and which is advantageous in production cost.SOLUTION: A compound represented by the following formula (1): wherein R1, R2 and n are as defined in the description. The method comprises reacting the compound represented by the formula (1) with (A) at least one fluorine source selected from hydrogen fluoride, a hydrogen fluoride salt and a fluoride salt, (B) at least one iodine source selected from iodine and ammonium iodide, and (C) a compound having at least one fluorinated quaternary nitrogen atom in the molecule. A step of difluorinating the compound represented by the formula (1), wherein the amount of the iodine source (B) used is less than 1.0 mol per 1 mol of the compound represented by the formula (1).SELECTED DRAWING: None

The invention relates to a fuel cell catalyst and a preparation method thereof, and belongs to the technical field of fuel cells. The preparation method of the fuel cell catalyst provided by the invention comprises the following steps: (1) performing heat treatment on conductive carbon black to obtain graphitized conductive carbon black; (2) mixing ammonium iodide with the graphitized conductive carbon black obtained in the step (1) to obtain mixed powder, and calcining the obtained mixed powder to obtain an iodine-doped carrier; and (3) dipping the iodine-doped carrier obtained in the step (2) in a platinum salt solution, drying, and carrying out heat treatment in a reducing atmosphere to obtain the fuel cell catalyst. According to the preparation method, ammonium iodide easy to sublimate and conductive carbon black subjected to graphitization heat treatment are uniformly mixed, the ammonium iodide sublimates to the surface of the graphitized conductive carbon black in the heat treatment process to realize in-situ doping, an iodine-doped voltage-resistant carrier is formed, and then Pt is loaded on the iodine-doped voltage-resistant carrier, so that the Pt-loaded iodine-doped voltage-resistant composite material is obtained. The fuel cell catalyst with high stability and excellent electrochemical performance is obtained.

This disclosure relates to trimethyl[2-(5-methyl-1H-indol-3-yl)ethyl]azanium iodide (5-methyl-A / ,A / ,A / trimethyltryptammonium iodide or 5-Me-TMT iodide), crystalline 5-Me-TMT iodide, triethyl ┌2-(5-methyl-1H-indol-3-yl)ethyl┘azanium iodide (5-methyl-A / , / V, / V-triethyltryptammonium iodide or 5-Me-TET iodide), crystalline 5-Me-TET iodide, triethyl[2-(1-methyl-1H-indol-3-yl)ethyl]azanium iodide (1-methyl- / V, / V, / V-triethyltryptammonium iodide or 1-Me-TET iodide), crystalline 1-Me-TET iodide, [2-(5-methyl-1H-indol-3-yl)ethyl]tripropylazanium acetonitrile iodide (5-methyl- / V, / V, / V-tri-n-propyltryptammonium iodide acetonitrile or 5-Me-TPT iodide acetonitrile), crystalline 5-Me-TPT iodide acetonitrile, [2-(7-methyl-1H-indol-3-yl)ethyl]tripropylazanium iodide (7-methyl-A / ,A / ,A / -tri-n-propyltryptammonium iodide or 7-Me-TPT iodide), crystalline 7-Me-TPT iodide, and specific crystalline forms thereof, including crystalline form 1 of 5-Me-TMT iodide, crystalline form 1 of 5-Me-TET iodide, crystalline form 1 of 1-Me-TET iodide, crystalline form 1 of 5-Me-TPT iodide acetonitrile, and crystalline form 1 of 7-Me-TPT iodide, to compositions containing the same, and to methods of treatment using them.

The invention relates to a preparation method of an ammonium ion intercalation two-dimensional material, which comprises the following steps: by taking a two-dimensional material single crystal as a raw material and ammonium iodide as an intercalation agent, putting the two-dimensional material single crystal into an ammonium iodide solution, heating, cooling, cleaning, and drying in vacuum to obtain an ammonium ion intercalation two-dimensional material compound. The preparation method is simple, quick, green, environment-friendly, high in efficiency and low in cost; the prepared ammonium ion intercalation type two-dimensional material has great application prospects in the aspects of energy storage, catalysis, ion exchange and the like.

The invention discloses a method for detecting silicon dioxide, calcium oxide and magnesium oxide in fly ash, which comprises the following steps: firing the fly ash at a certain temperature for a certain time, weighing a certain amount of fired sample, preparing a glass sheet by using lithium tetraborate-lithium metaborate as a flux and ammonium iodide as a release agent in a melting furnace at a certain temperature for a certain time, and then sintering the glass sheet in a sintering furnace at a certain temperature for a certain time. The X-ray fluorescence intensity of silicon, calcium and magnesium is determined through an X-ray fluorescence spectrometer, so that the determination of silicon dioxide, calcium oxide and magnesium oxide is completed. The method is simple to operate, high in analysis speed, accurate in result and easy to master.

The present invention belongs to the technical field of preparation of oxadiazole derivatives. The present invention provides a method for preparing 2-amino-1,3,4-oxadiazole derivatives by electrocatalysis, comprising the following steps: adding 0.2mmol of benzoylhydrazide compounds, 0.4mmol of tetrabutylammonium iodide, 0.4mmol of 1,4-diazabicyclo[2.2.2]octane, 0.4mmol of sodium bicarbonate, and 6mL of acetonitrile to an electrolytic cell; then adding 0.3mmol of phenyl isothiocyanate compounds dropwise; reacting under a DC constant current between an electrode anode and an electrode cathode. The present invention adopts electrocatalysis with benzoylhydrazide and phenyl isothiocyanate as reaction substrates, acetonitrile and other cheap and less toxic reagents as solvents, and passing current to replace the oxidant in conventional reactions, thereby synthesizing oxadiazole compounds under mild and green conditions.

The application is a preparation method and application of an iodine-doped cobalt-based electrocatalyst. The method uses mild ammonium iodide to perform a doping and synchronous etching strategy, successfully anchoring cobalt in the form of single atoms and clusters on an iodine-doped carbon substrate in one step; the obtained iodine-doped cobalt-based electrocatalyst has tandem catalytic active sites composed of iodine-coordinated cobalt single atoms and cobalt clusters, which can simultaneously promote the deoxygenation and hydrogenation steps in the electrocatalytic reduction of nitrate. The electrocatalytic synthesis of ammonia obtained by the application exhibits an ammonia yield of more than 17000 μg h ‑1 mg cat. ‑1 and a Faraday efficiency of more than 95%, achieving the simultaneous coexistence of high ammonia yield and high Faraday efficiency, and providing a new idea for green, efficient and sustainable ammonia synthesis.

The application relates to the fine chemical technology field and discloses a preparation method of 2-substituted-2,3-dihydro-4 H benzothiazine-4-ketone. The specific steps are as follows: 1,2-benzisothiazolin-3-ketone and carbonyl compound are used as raw materials, hydrogen iodide and ammonium iodide are used as important additives, one-step reaction is carried out in an organic solvent, and the target product can be obtained after purification. The method is simple in operation, high in yield and has potential application value.

The invention discloses a method for preparing an oxygen / thioxanthone compound. 2-aryloxy group / sulfanyl aromatic formaldehyde is heated and reacted in the presence of tetrabutylammonium iodide, water, and a solvent to prepare the oxygen / thioxanthone compound. The present invention uses inexpensive and readily available tetrabutylammonium iodide as a catalyst. In the presence of water, the oxygen / thioxanthone compound is efficiently prepared in a one-pot, one-step process by directly annulating the 2-aryloxy group / sulfanyl aromatic formaldehyde. This method has the advantages of not requiring transition metals, having a wide substrate range, low cost, and being environmentally friendly. It avoids the limitations of using hazardous reagents, transition metal catalysts, and multi-step reactions, and is conducive to industrialized production.

The application discloses a method for synthesizing N-(hetero) aryl sulfonamide compounds. The method uses bipyridine as a ligand, nickel acetate or nickel chloride as a catalyst, low-cost low-activity (hetero) aryl chloride and different types of sulfonamides as substrates, 1,8-diazabicycloundec-7-ene, tetramethyl guanidine, 7-methyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene and the like as organic bases, and tetra-n-butylammonium iodide as an additive. The C-N coupling reaction of (hetero) aryl chloride and sulfonamide is realized by light-induced nickel catalysis in an argon atmosphere, so as to realize the synthesis of various (hetero) aryl sulfonamide compounds. The reaction system is simple, the operation is simple, the reaction condition is mild, the post-treatment is simple, the yield is good, the substrate range is wide, the use of traditional expensive metal catalysts and inorganic bases is avoided, the problems of complex catalytic system reaction and poor functional group compatibility are solved, and the method is a simple and efficient method for synthesizing (hetero) aryl sulfonamide compounds. The method has good application prospect.

The invention provides a marine antifouling coating as well as a preparation method and application thereof. The marine antifouling coating comprises a base material, epoxy resin primer and a composite antifouling layer which are sequentially stacked, and the composite antifouling layer comprises a copolymer of 2-acrylamide-2-methyl-1-propanesulfonate and trimethyl (acrylamide propyl) ammonium iodide and a polydopamine-metal ion complex. Epoxy resin primer is arranged on the surface of a base material, then a composite coating containing PDA (at) M and AMPs + / TMAAI is prepared on the epoxy resin substrate through a co-deposition method, the composite coating and the epoxy resin primer act together, and the long-acting antifouling performance of the coating in the marine environment is improved.

The invention discloses a preparation method of a heterojunction modified C60 supported monatomic iodine catalyst, and belongs to the technical field of nano materials and catalysis. According to the method, iodine atoms are stably loaded on a C60 carrier through oxidation pretreatment, heterostructure construction and a pyrolysis anchoring process. The method comprises the following steps: firstly, carrying out surface carboxylation activation on C60 by adopting nitric acid / sulfuric acid mixed acid; then mixing with thiourea, and performing high-temperature annealing to realize nitrogen-sulfur co-doping, so as to form a donor-acceptor pair heterojunction in a C60 skeleton; and finally, ball-milling and mixing with ammonium iodide or potassium iodate, and pyrolyzing in an inert atmosphere, so that iodine atoms and defect sites of the carrier form a C-I-N or C-I-S coordination structure, and monatomic-scale dispersion is realized. Topological defect anchoring points are created in C60 through heterojunction engineering, so that the iodine loading capacity reaches 5.0 wt% or above, the cycling stability is remarkably improved, the electron structure is optimized through nitrogen and sulfur synergistic doping, the half-wave potential of the catalyst in the oxygen reduction reaction reaches 0.85 V or above, and the apparent rate constant of persulfate for activating and degrading pollutants reaches 0.45 min <-1 >. The method has the advantages of simple process and low raw material cost, and is suitable for preparing efficient non-metal catalysts in the fields of fuel cells, metal-air battery electrodes, advanced oxidation water treatment and the like.

The invention provides an organic-inorganic hybrid perovskite nanowire material, a preparation method thereof and a gas sensor, and relates to the technical field of semiconductor materials and devices. The preparation method comprises the following steps: mixing lead iodide, methylamine hydriodic acid / cesium iodide and phenylethylamine hydriodic acid / butylammonium iodide in a set molar ratio according to the metering number in the general formula of the organic-inorganic hybrid perovskite, and adding a perovskite benign solvent to obtain an organic-inorganic hybrid perovskite precursor solution; and dripping the organic-inorganic hybrid perovskite precursor solution on a substrate, exposing the organic-inorganic hybrid perovskite precursor solution in an anti-solvent atmosphere, and crystallizing to obtain the organic-inorganic hybrid perovskite nanowire material. The organic-inorganic hybrid perovskite nanowire material with a three-dimensional network structure is prepared by controlling the concentration of the perovskite precursor solution and the experimental temperature based on raw materials in a molar ratio required by a quasi-two-dimensional perovskite crystal, and the obtained product has a higher specific surface area.

The application relates to application of a millimeter-level cadmium ammonium iodide monohydrate second-order nonlinear optical crystal, and the optical crystal is used for outputting 532nm green light under 1064nm laser irradiation. Compared with the prior art, the millimeter-level second-order nonlinear optical crystal NH4CdI3.H2O provided by the application can output 532nm green light under 1064nm laser irradiation, the powder frequency doubling effect thereof under 1064nm laser irradiation is 2.5 times that of KH2PO4, phase matching can be realized, the band gap is 3.8eV, and the optical crystal belongs to a wide band gap crystal. The optical crystal can be applied to the fields of laser frequency conversion, photoelectric modulation or laser signal holographic storage and the like.

The invention relates to the technical field of film preparation, in particular to a preparation method for preparing an ultra-thick formamidine and methylamine mixed perovskite film through a blade coating method and application of the super-thick formamidine and methylamine mixed perovskite film through the blade coating method. The preparation method comprises the following steps that a precursor solution is prepared, specifically, methyl ammonium iodide, formamidine ammonium iodide and lead iodide are put into a ternary mixed solvent, and preparation of the precursor solution is completed; and performing deposition treatment, namely depositing the precursor solution prepared in the step 1 on a glass substrate by adopting a blade coating method to form a thin film, and completing the deposition treatment of the glass substrate. In the ternary mixed solvent, ethylene glycol monomethyl ether ensures rapid drying, N, N-dimethylformamide stabilizes the morphology of the wet film, dimethyl sulfoxide regulates and controls the crystallization process, and after the perovskite wet film prepared under the system is subjected to vacuum flash evaporation and thermal annealing, the perovskite wet film can be rapidly dried. And finally, the high-quality perovskite thin film with large crystal grains, uniform distribution, black and bright mirror surfaces on the upper surface and the lower surface and no void defect is formed, and the requirement of a high-performance solar cell on an active layer structure is met.

This invention discloses a process and active carrier catalyst for the catalytic synthesis of acetyl empagliflozin. The process utilizes a yeast cell wall-mediated active carrier nickel-phosphorus composite catalyst. The catalyst is activated in a water / glycerol mixed solvent via microwave-ultrasound dual-field synergistic activation, catalyzing the reaction of compound 5 with compound 4 to obtain compound 3. In a supercritical CO2 / ionic liquid system, leveraging the photoisomerization properties of spiropyran-quaternary ammonium iodide, under low-voltage electrocatalysis and UV-Vis switching conditions, the directional glycosylation reaction of compound 3 with compound 2 is achieved to obtain compound 1. This invention utilizes the porous structure and functional groups of the yeast cell wall to stabilize nano-nickel-phosphorus particles, improving catalytic efficiency and reusability. Through the synergistic guiding effect of photoresponsive molecules and ionic liquids, high selectivity of the reaction is achieved. The entire process uses green solvents, and a closed-loop catalyst recovery process is established, offering advantages such as environmental friendliness, low cost, and high product purity.

The present disclosure relates to the technical field of hydrogen production, in particular to a sulfur-iodine cycle hydrogen production process and system based on ammonium iodide crystallization. The process includes S1, Bunsen reaction and two-phase separation; S2, sulfuric acid decomposition and gas circulation; S3, ammonium iodide crystallization and circulation; S4, ammonium iodide drying and decomposition; S5, gas circulation and hydrogen purification. The present disclosure adopts a process of circulating ammonia-ammonium iodide, successfully extracts anhydrous and iodine-free hydrogen iodide gas, and at the same time adopts a pressurization and cooling process to realize the condensation and reuse of excess ammonia, making the economy of the sulfur-iodine cycle hydrogen production reach the industrialization threshold.

The present invention discloses an organic ammonium iodide-based electrolyte and its preparation method and application. The organic ammonium iodide-based electrolyte is composed of a metal iodide salt, an organic ammonium iodide, and an organic solvent. The organic ammonium iodide-based electrolyte of the present invention has stable properties and is easy to prepare. When applied to secondary batteries, it significantly improves the electrochemical performance. At a current density of 0.02 mA cm ‑2 , the symmetric battery formed by it can stably cycle for more than 400 h, greatly reducing the overpotential, and has broad application prospects in the field of secondary batteries.

The invention provides a cobalt-manganese leaching agent, a preparation method thereof and application of the cobalt-manganese leaching agent in recycling of waste lithium batteries, the cobalt-manganese leaching agent comprises trialkyl methyl ammonium iodide and an alcohol compound, and cobalt-manganese and nickel-lithium in the waste lithium batteries can be effectively separated to obtain leaching liquid containing cobalt and manganese; the method comprises the following steps: diluting and thermally treating a leaching solution containing cobalt and manganese to obtain a manganese dioxide precipitate, obtaining a cobalt precipitate by using tannic acid, and roasting to obtain high-purity Co2O3; according to the cobalt-manganese leaching agent, use of highly corrosive mineral acid is avoided, the process is simple, the condition is mild, and the metal separation degree is high.

The invention provides a method for detecting tetrabutylammonium iodide and / or tetrabutylammonium bromide in a medicine, the method is efficient and rapid, tetrabutylammonium iodide and tetrabutylammonium bromide can be quantified by detecting iodide ions and bromide ions, and the method has the characteristics of short analysis time, simple analysis steps, low analysis cost and the like. The method provided by the invention is a general analysis method, is applicable to detection of most drugs, and can replace an expensive ion chromatograph, so that the equipment cost is greatly reduced.

The disclosure relates to [2-(5-chloro-1H-indol-3-yl)ethyl](propan-2-yl)azanium iodide (5-chloro-N isopropyltryptammonium iodide or 5-Cl-NiPT iodide), crystalline 5-Cl-NiPT iodide, [2-(5-methoxy-1H-indol-3-yl)ethyl](propan-2-yl)azanium iodide (5-methoxy-N-isopropyltryptammonium iodide or 5-MeO-NiPT iodide), crystalline 5-MeO-NiPT iodide, [2-(5-methyl-1H-indol-3-yl)ethyl](propan-2-yl)azanium iodide (5-methyl-N-isopropyltryptammonium iodide or 5-Me-NiPT iodide), crystalline 5-Me-NiPT iodide, [2-(2-methyl-1H-indol-3-yl)ethyl](propan-2-yl)azanium iodide (2-methyl-N-isopropyltryptammonium iodide or 2-Me-NiPT iodide), crystalline 2-Me-NiPT iodide, [2-(7-methyl 1H-indol-3-yl)ethyl](propan-2-yl)azanium iodide (7-methyl-N-isopropyltryptammonium iodide or 7-Me-NiPT iodide), crystalline 7-Me-NiPT iodide, [2-(5-fluoro-1H-indol-3-yl)ethyl](propan-2-yl)azanium iodide (5-fluoro-N-isopropyltryptammonium iodide or 5-F-NiPT iodide), crystalline 5-F-NiPT iodide, and specific crystalline forms thereof, including crystalline form 1 of 5-Cl-NiPT iodide, crystalline form 1 of 5-MeO-NiPT iodide, crystalline form 1 of 5-Me-NiPT iodide, crystalline form 1 of 2-Me-NiPT iodide, crystalline form 1 of 7-Me-NiPT iodide, and crystalline form 1 of 5-F-NiPT iodide, to compositions containing the same, and to methods of treatment using them. This disclosure relates to monoalkylated and dialkyled tryptamine analogs, and to methods of treatment / therapeutic uses thereof. This disclosure relates to an improved method of making monoalkylated and dialkylated tryptamine analogs.

This disclosure relates to (2-{4-[ethanesulfonyl)oxy]-1H-indol-3-yl}ethyl)dipropylazanium chloride (4-(ethylsulfonyloxy)-N,N-di-n-propyltryptammonium chloride or 4-(ethylsulfonyloxy)-DPT chloride), crystalline 4-(ethylsulfonyloxy)-DPT chloride, [2-(1H-indol-3-yl)ethyl]tripropylazanium iodide (N,N,N-tri-n-propyltryptammonium iodide or TPT iodide), crystalline TPT iodide, [2-(5-chloro-1H-indol-3-yl)ethyl]bis(propan-2-yl)azanium iodide (5-chloro-A / ,A / -di-n-isopropyltryptammonium iodide or 5-CI-DiPT iodide), crystalline 5-CI-DiPT iodide, 2-(5-chloro-1H-indol-3-yl)ethan-1-aminium hydrogen oxalate (5-chlorotryptammonium hydrogenoxalate or 5-CI-T hydrogenoxalate), crystalline 5-CI-T hydrogenoxalate, bis(2-(5-chloro-1H-indol-3-yl)ethan-1-aminium) dihydrate oxalate (5-chlorotryptammonium oxalate hydrate or 5-CI-T oxalate hydrate), crystalline 5-CI-T oxalate hydrate, and specific crystalline forms thereof, including crystalline form 1 of 4-(ethylsulfonyloxy)-DPT chloride, crystalline form 1 of TPT iodide, crystalline form of 1 of 5-CI-DiPT iodide, crystalline form 1 of 5-CI-T hydrogenoxalate, and crystalline form 1 of 5-CI-T oxalate hydrate, to compositions containing the same, and to methods of treatment using the.

The invention relates to the technical field of flexible photoelectric detection, in particular to a flexible perovskite thin film, a preparation method and a flexible perovskite photoelectric detector. The preparation method of the flexible perovskite thin film comprises the following steps: mixing phenethyl ammonium iodide, methyl ammonium chloride, PbI2 and PbCl2 in a solvent system to obtain a perovskite precursor solution; carrying out spin coating on the perovskite precursor solution under the protection of nitrogen, and adding an anti-solvent in the spin coating process; and then carrying out annealing treatment to obtain a flexible perovskite thin film. The anti-solvent is an SEBS (styrene-ethylene-butylene-styrene)-toluene solution. The method not only can improve the mechanical stability and flexibility of the flexible perovskite film, but also can enhance the absorption of ultraviolet visible light by the flexible perovskite film, thereby effectively improving the performance of the flexible perovskite photoelectric detector.

The invention discloses a low-noise infrared detector and a preparation method thereof, the low-noise infrared detector comprises a substrate, a metal electrode, an electron transport layer and a quantum dot layer, the ligand of quantum dots in the quantum dot layer is at least one of dithioglycol and tetrabutylammonium iodide, the electron transport layer is one of a graphene layer and a transition metal disulfide layer. The quantum dot layer replaced by the specific ligand is matched with the electron transport layer, contact between the quantum dot layer and the electron transport layer is improved, the defect mode of the quantum dot layer is reduced, the surface of the quantum dot is further passivated, the performance of the electron transport layer is more stable, noise in the infrared detector is reduced, and the performance of the infrared detector is improved. And the noise performance of the device is improved.

The invention relates to a purification method of high-purity quartz sand, and belongs to the technical field of quartz sand purification. According to the purification method of the high-purity quartz sand, the pretreated quartz sand and the solid halogenating agent (containing ammonium iodide and ammonium bromide) are mixed, activated roasting is conducted under microwave irradiation, inclusion in the quartz sand is burst through the selective heating effect of microwaves, and impurity elements are promoted to react with the solid halogenating agent to generate volatile halides to be removed. Then, the microwave halide material is further purified through chlorination of a gas chlorinating agent, and finally, a high-purity quartz sand product is obtained through aftertreatment. According to the method, gas-solid synergistic halogenation and microwave activation are combined, so that the activation energy and the reaction temperature of the halogenation reaction are remarkably reduced, the removal efficiency of impurities difficult to remove such as boron, aluminum and titanium is improved, 99.9% of quartz sand can be purified to 99.99% or above, and the method has the advantages of low energy consumption and high product purity.

Provided is a novel method for producing a fluorinated organic compound that facilitates removal or separation of an auxiliary agent and that is advantageous in terms of production costs. The production method is a method for producing a difluoride which is a compound represented by formula (1) (in the formula, R1, R2, and n have the same definitions as the symbols described in the specification). The method involves a step for reacting the compound represented by formula (1) with (A) at least one fluorine source selected from hydrogen fluoride, hydrogen fluoride salts, and fluoride salts, (B) at least one iodine source selected from iodine and ammonium iodide, and (C) a compound having at least one fluorinated quaternary nitrogen atom in the molecule to difluorinate the compound represented by formula (1), wherein the amount of the iodine source (B) used is less than 1.0 mol with respect to 1 mol of the compound represented by formula (1).

The present invention discloses a method for electrochemically promoting the construction of N-sulfide-substituted sulfoximine derivatives. The synthesis method of the method is as follows: in a three-necked round-bottom flask, tetrabutylammonium iodide, sulfoximine compounds, disulfide compounds, tert-butyl alcohol, and a solvent are added, electrodes are inserted, and the reaction is stirred under power at room temperature. The crude product can be separated and purified to obtain N-sulfide-substituted sulfoximine derivatives. The present invention realizes an efficient coupling reaction of sulfoximine compounds and disulfide compounds under electrochemical conditions, and a series of functionalized N-sulfide sulfoximine derivatives can be constructed by simple operation. In addition, the reaction does not require the addition of a metal catalyst, an oxidant, and a base, and has good functional group tolerance.

The application discloses a preparation method of a double-layer composite material and application thereof, and the preparation method of the double-layer composite material comprises the following steps: dissolving formamidinium hydriodide, methylammonium iodide, lead iodide, stannous iodide and an additive in a mixed solution of dimethylformamide and dimethyl sulfoxide to prepare a perovskite precursor solution; coating the perovskite precursor solution on a substrate in a spin coating mode; treating the precursor solution with an anti-solvent during the spin coating process to obtain an intermediate phase thin film; and performing annealing treatment on the intermediate phase thin film to obtain a fully crystallized double-layer perovskite thin film. By using the method, the problems that the existing perovskite battery has poor absorption to near-infrared light, the photoelectric conversion efficiency is reduced, the utilization rate of light is not high, the device temperature is increased, and the application field is limited, and the existing double-layer perovskite thin film is prepared in layers, the preparation process is increased, and the production efficiency of the battery is reduced and the like can be solved.