115 results about "Ammonium iodide" patented technology

The present invention relates to an electrochemical synthesis method of 2-aminothiazole compounds with the structural formula shown below: 1 =4‑Me‑, 3‑Me‑, 2‑Me‑, 4‑Et‑, 4‑MeO‑, 4‑OH‑, 4‑F‑, 4‑Cl‑, 3‑Cl‑, 2‑Cl‑.R 2 =H, Me, Et, Ph. The main process is: in a single-chamber electrolytic cell, ketone (0.589 g, 3 mmol), thiourea (0.076 g, 1 mmol), anhydrous ammonium iodide (0.145 g, 1 mmol), TsOH·H 2 O (0.951g, 5mmol), DMSO (10ml), H 2 O (5ml). Both the cathode and the anode are inserted into graphite sheets, and the current density is 5mA / cm 2 The reaction temperature was 70°C and the current was 3F / mol. The corresponding 2-aminothiazole compound 3 was obtained with a yield of 38-72%.

The invention belongs to the technical field of photovoltaic solar materials, and particularly relates to a high-conversion-efficiency perovskite precursor material and a preparation method thereof. The high-conversion-efficiency perovskite precursor material is composed of phenyl ammonium cesium composite cations, metal halide, an additive, a nuclear auxiliary agent and a solvent. By compounding phenylethyl ammonium iodide and cesium iodide, phenylammonium and cesium cations are introduced into perovskite crystal lattices, organic-inorganic balance of the material is optimized, phenylammonium promotes formation of a quasi-two-dimensional structure, and damp-heat stability is enhanced; cesium ions fill A-site gaps, so that crystal lattices are tighter, and the thermal stability and the photoelectric conversion efficiency are improved; the synergistic matching addition of the metal halide realizes band gap regulation and control and spectrum matching, and quaternary ammonium salt adjusts nucleation and grain growth, so that a uniform film structure is ensured, and defects are reduced; and guanidine salt passivates defects after crystal growth, stabilizes crystal lattices, and improves charge life and device efficiency.

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 relates to a degradable high-strength medical adhesive and a preparation method and application thereof.The medical adhesive is prepared from raw materials through reaction, the raw materials comprise a component A, a component B and a component C. The component A is trihydric alcohol and derivatives thereof and / or trihydric alcohol modified by polyethylene glycol carboxylic acid derivatives and derivatives thereof, and the component C is trihydric alcohol modified by polyethylene glycol carboxylic acid derivatives and derivatives thereof. The component B is isocyanate, amino acid or an amino acid derivative, and the component C is N-methyldiethanolamine and / or bis (2-ethoxyl)-N-methyl-N-trifluoromethyl ammonium iodide and a derivative of the bis (2-ethoxyl)-N-methyl-N-trifluoromethyl ammonium iodide; the molar ratio of-NCO groups in the component B to total-OH groups in the component A and the component C is 2: 1, and the molar ratio of the component A to the component C is (1-9): 2. The component A and the component C are mixed, heated and dissolved, then a catalyst and the component B are added, and a mixed reaction system is obtained; and cooling after the reaction is completed, adding a rheology modifier, a foaming catalyst and a stabilizer, and uniformly mixing to obtain the degradable high-strength medical adhesive which can be applied to a functional composite material.

The invention provides a preparation method of a perovskite thin film and a perovskite light-emitting diode. The method comprises the steps that lead iodide, lead bromide, a cesium iodide mixture and organic ammonium iodide salt are dissolved in a polar solvent, a perovskite precursor solution is obtained, and the cesium iodide mixture comprises cesium iodide and cesium triiodide; and dispensing the perovskite precursor solution on a substrate, enabling the substrate to rotate in an accelerated manner, and dropwise adding an anti-solvent in the rotation process to obtain the perovskite thin film. The perovskite thin film prepared by the invention is more compact and has fewer holes, meanwhile, the formation of a low-dimensional phase in the perovskite thin film is reduced, the defect density in the perovskite thin film is reduced, halogen movement is reduced, and better spectral stability and operation stability are realized while the efficiency and the brightness of a pure red light perovskite light-emitting diode are improved.

The invention relates to a preparation method and application of an iodine-doped cobalt-based electrocatalyst. According to the method, cobalt is successfully anchored on an iodine-doped carbon substrate in a form of coexistence of single atoms and clusters in one step by using a strategy of carrying out doping and synchronous etching by using mild ammonium iodide; the obtained iodine-doped cobalt-based electrocatalyst has series catalytic active sites composed of iodine-coordinated cobalt single atoms and cobalt clusters, and can promote deoxidation and hydrogenation steps in an electrocatalytic nitrate reduction reaction at the same time. The obtained electrocatalytic synthesis ammonia shows the ammonia yield exceeding 17000 microgram h <-1 > mgcat.-1 and the Faraday efficiency larger than 95%, high ammonia yield and high Faraday efficiency are achieved at the same time, and a new thought is provided for green, efficient and sustainable ammonia synthesis.

The invention provides a hole transport layer precursor solution, a solar cell and a method for preparing the solar cell. The hole transport layer precursor solution contains a carbazole hole transport material, an organic iodine ammonium salt and a solvent, wherein the organic iodine ammonium salt is selected from alkyl ammonium iodide and / or aryl amine iodide. By applying the technical scheme of the invention, the limitation of the preparation of the self-assembly layer in the prior art can be solved, the photoelectric conversion efficiency of the perovskite solar cell is also remarkably improved, and an important technical support is provided for the industrial application of the perovskite photovoltaic technology.

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 invention belongs to the technical field of preparation of oxadiazole derivatives. The invention provides a method for preparing a 2-amino-1, 3, 4-oxadiazole derivative through electro-catalysis, which comprises the following steps: adding 0.2 mmol of benzoyl hydrazine compound, 0.4 mmol of tetrabutylammonium iodide, 0.4 mmol of 1, 4-diazabicyclo [2.2. 2] octane, 0.4 mmol of sodium bicarbonate and 6 mL of acetonitrile into an electrolytic tank; then, 0.3 mmol of a phenyl isothiocyanate compound is added dropwise; the reaction is carried out under a direct-current constant current between the electrode anode and the electrode cathode. According to the method, benzoyl hydrazine and phenyl isothiocyanate are taken as reaction substrates through electro-catalysis, reagents such as acetonitrile which is low in price and low in toxicity are taken as solvents, an oxidizing agent in a conventional reaction is replaced by a mode of introducing current, and the oxadiazole compound is synthesized under mild and green conditions.

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 invention discloses a high-foaming-multiple sole material and a preparation method thereof, and belongs to the technical field of sole materials. According to the high-foaming-multiple sole material, firstly, bio-based polyurethane, modified crab shell powder, tetrabutylammonium iodide and L-ascorbic acid are evenly mixed and then subjected to foaming treatment through supercritical carbon dioxide, and then the mixture is heated and subjected to a heat preservation reaction in a carbon dioxide environment under the specific pressure; the synthetic process of the bio-based polyurethane comprises the following steps: pre-polymerizing castor oil and a diisocyanate monomer, then adding a chain extender 1, 4-butanediol and a catalyst, carrying out a mixed reaction, and finally carrying out epoxidation treatment, thereby obtaining the bio-based polyurethane. In the formula, 1, 4-butanediol is selected as a chain extender, namely 1, 4-butanediol, and lysine diisocyanate is selected as a diisocyanate monomer; the modified crab shell powder is obtained by carrying out surface modification treatment on crab shell powder by utilizing 3-aminopropyltriethoxysilane; the high-foaming-multiple sole material disclosed by the invention is good in wear resistance, good in shrinkage resistance, good in high temperature resistance and good in environmental protection performance.

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 invention discloses a two-dimensional electro-catalysis hydrogen evolution material constructed based on cation-pi interaction and a preparation method and application, and particularly relates to the field of catalysts, the two-dimensional electro-catalysis hydrogen evolution material comprises a plurality of two-dimensional electro-catalysis hydrogen evolution monomers, the two-dimensional electro-catalysis hydrogen evolution monomers are connected end to end, and the preparation method of the monomers comprises the steps that 4, 4 '-biphenyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3 The preparation method comprises the following steps: carrying out coupling reaction on 4, 4 '-dihydroxyazobenzene, bromo-aromatic hydrocarbon, tetrabutylammonium iodide and cesium carbonate to obtain a product; the product, 1, 2-dibromoethane and cesium carbonate are subjected to an etherification reaction, and an R2-bromo-azobenzene compound is obtained; the preparation method comprises the following steps: carrying out nucleophilic substitution reaction on an R2-bromo-azobenzene compound and aromatic cations, adding an ammonium hexafluorophosphate solution into the R2-bromo-azobenzene compound and the aromatic cations, and carrying out anion exchange reaction, so as to obtain the R1-ethyoxyl-phenyl-azo-phenoxy-ethyl-R2-hexafluorophosphate. The exposure of hydrogen adsorption active sites can be obviously increased, so that the electro-catalytic hydrogen evolution performance is obviously improved.

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 invention discloses a preparation method of difluoroethylamine, and relates to the technical field of chemical synthesis. The method comprises the following steps: S1, preparing a catalyst: preparing the catalyst by taking one of aluminum oxide, activated carbon and silicon dioxide as a carrier, taking one of ammonium iodide, sodium iodide and potassium iodide as a main active component and taking nickel nitrate, magnesium nitrate and copper nitrate as auxiliary catalytic components; s2, filling the fixed bed reactor with a catalyst; s3, introducing difluorochloroethane and ammonia water into the fixed bed reactor; and S4, difluorochloroethane and ammonia water react under the action of the catalyst to generate difluoroethylamine and a byproduct, difluoroethylamine is led out from the lower part of the reactor and is cooled and collected by a cold trap, and non-condensable gas is guided to a tail gas treatment system after being absorbed by water. The method has the advantages of mild reaction conditions, simple reaction equipment and easy operation conditions, and can be used for synthesizing difluoroethylamine under continuous conditions. The method has the advantages of low cost, simple post-treatment, less three-waste generation, high product yield and easiness in industrial large-scale production.

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.