78results about How to "Atom utilization is high" patented technology

The invention relates to a non-noble metal fuel cell oxygen reduction catalyst based on a self-assembled semi-interpenetrating polymer network and a preparation method and application thereof, and belongs to the technical field of fuel cell oxygen reduction catalysts. The preparation method of the catalyst comprises the following steps: S1, dissolving polysaccharide in ultrapure water, heating and stirring, then adding a polymer monomer, a polymerization initiator, a salt template and a non-noble metal source solution, heating and stirring until uniform orange red hydrogel is obtained, then adding a nitrogen source, continuously heating and stirring, and evaporating a solvent to dryness, so as to obtain a polysaccharide solution; freezing and drying to obtain an orange powder sample; s2, performing pyrolysis treatment on the orange powder sample to obtain a black powder sample, and performing acid pickling, suction filtration and drying to obtain a precursor product; s3, pyrolyzing the precursor product again to obtain the catalyst. The semi-interpenetrating polymer network hydrogel is synthesized in a self-assembly mode, and the catalyst with high loading capacity and atomic-scale dispersion is formed through pyrolysis.

The invention relates to the technical field of nitrobenzene production, in particular to a method for preparing nitrobenzene by adopting a microreactor under a low-acid condition, the method for preparing nitrobenzene comprises the following steps: introducing a nitrating agent and raw material benzene into the microreactor for nitration reaction to obtain nitrobenzene, the microreactor is provided with at least four reaction modules which are connected in series, a nitrating agent and raw material benzene are fed into the first reaction module, and concentrated sulfuric acid is supplemented into at least one reaction module in other reaction modules except the first reaction module in the nitration reaction process; the effective concentration of sulfuric acid in the nitrating agent is not higher than 77%. The method for preparing nitrobenzene solves the production problems that benzene in a micro-reaction system is poor in reaction stability, incomplete in conversion and large in residual quantity in a low-acid environment, dinitration is affected, and the yield of waste acid is large. Finally, a mechanical application process of the dinitration waste acid and the acidic benzene is realized, the production process is safe and reliable, the operation flexibility is high, and the stability is high.

The invention discloses an application of cobalt-loaded nitrogen-doped hollow carbon spheres in hydrodechlorination of electric catalytic florfenicol. According to the invention, cobalt is loaded on nitrogen-doped hollow carbon spheres to obtain cobalt-loaded nitrogen-doped hollow carbon spheres (Co / N-HCS). The cobalt-loaded nitrogen-doped hollow carbon spheres (Co / N-HCS) can efficiently remove carbon-chlorine bonds in antibiotic florfenicol molecules, and show very high florfenicol degradation rate and dechlorination rate.

The invention discloses a preparation method of a self-supporting carbon nanofiber loaded high-spinning Fe monatomic catalyst and application of the self-supporting carbon nanofiber loaded high-spinning Fe monatomic catalyst in a flexible zinc air battery, and the self-supporting carbon nanofiber loaded high-spinning Fe monatomic catalyst (Fe-N4 / NGC-C) is prepared by using an electrostatic spinning technology in combination with a high-temperature pyrolysis strategy; the carbon nanofiber has the advantages of high length-width ratio, large specific surface area, strong stability and the like, can realize uniform distribution of metal Fe monatomic, and inhibits aggregation of electrocatalytic active sites in the carbonization process. According to the preparation method, the atom utilization rate and the conductivity can be improved, and low load and high catalytic performance are realized.

The invention relates to the technical field of electrochemical synthesis, in particular to an electrochemical preparation method of dimethyl sulfoxide, which comprises the following steps: uniformly mixing a solvent, dimethyl sulfide, water and electrolyte to obtain an electrolysis system, and carrying out electrolytic reaction on the obtained electrolysis system to obtain dimethyl sulfoxide. According to the electrochemical preparation method of the dimethyl sulfoxide, the dimethyl sulfide is taken as a raw material, and the dimethyl sulfoxide is obtained in one step with high Faraday efficiency. Compared with a traditional dimethyl sulfoxide synthesis method, the method has the advantages of small pollution, high atom utilization rate and weak corrosion to devices, and meets the requirements of green and safe production. According to the electrochemical preparation method of the dimethyl sulfoxide, an additional oxidant is not needed, and the only by-product is hydrogen, so that the requirement of green synthesis is met. And moreover, the Faraday efficiency of the reaction is high, and the method has a better industrial application prospect.

The invention relates to the technical field of synthesis of antibody-coupled drug linkers, in particular to a synthesis method of MC-Val-Cit-PAB. The synthesis method comprises the following steps: carrying out amide condensation reaction on L-citrulline and M1 to form M2; carrying out amide condensation reaction on L-valine and M3 to form M4; and carrying out amide condensation reaction on M2 and M4 to form M5. The synthesis method improves the problems of low product purity, high initial raw material cost, low reaction conversion rate and the like in the existing synthesis method.

The invention relates to a method for preparing a methyl propionate palladium complex through free coordination cage effect stabilization ethylene hydrogen esterification, which aims at the problem that central metal of the palladium complex for preparing methyl propionate through ethylene methyl esterification is easy to gather and inactivate, and utilizes the cage effect of a stabilizer to construct a cage network around the palladium complex; meanwhile, the free coordination effect is utilized to cooperate with a bidentate phosphine ligand, so that the formation of palladium black inactivation of an active component palladium is effectively slowed down, the stabilization time is maximally prolonged by 360 hours, the TOF value is as high as 20000 h <-1 >, and the selectivity is 100%. The hydrogen esterification reaction system comprises ethylene, CO, methanol, a stabilizer and a palladium complex catalyst; the palladium complex catalyst comprises palladium acetate, 1, 2-bis (di-tert-butylphosphinomethyl) benzene and an acid accelerant. According to the method, the stability of the palladium complex is greatly improved while high catalytic activity and selectivity of the reaction are guaranteed, the reaction condition is mild, the atom utilization rate is high, and the method has a good application prospect in the reaction for synthesizing methyl propionate through ethylene hydrogen esterification.

The application discloses a preparation method of a silodosin key intermediate and belongs to the technical field of drug chemical synthesis. The silodosin key intermediate is prepared from indoline as raw material through halogenation, cyanation, N-benzoylpropylamine protection, substitution, amination, reduction and salt formation, and the silodosin key intermediate is compound 1. The synthesis line is novel, the raw reagents are easy to obtain or prepare, high-risk and high-pollution reagents are not used, the method is safe, environment-friendly, mild in reaction condition, easy and controllable to operate, the prepared silodosin key intermediate is good in purity, high in yield and high in atom utilization rate, and the industrial production problem of silodosin can be practically solved.

The invention relates to the technical field of organic synthesis, in particular to a rapid synthesis method of a polysubstituted pyrimidine carboxylic acid compound. The rapid synthesis method of the polysubstituted pyrimidine carboxylic acid compound comprises the following steps: by taking 4, 6-dichloro-5-methoxypyrimidine as a raw material and tetrahydrofuran as a solvent, carrying out Grignard reaction to prepare an intermediate I, then carrying out Suzuki reaction to obtain an intermediate II, carrying out saponification reaction on sodium hydroxide, and then reacting with hydroiodic acid to obtain the polysubstituted pyrimidine carboxylic acid derivative. According to the rapid synthesis method of the polysubstituted pyrimidine carboxylic acid compound, the reaction only needs four steps, the conditions are mild, the atom utilization rate is high, the route is safer and more environmentally friendly, industrial production is facilitated, and the polysubstituted pyrimidine carboxylic acid compound can be used as an important pharmaceutical and chemical building block to be conveniently used for subsequent derivatization.

The present invention proposes a dihydropyrroloquinazolinone compound containing trifluoromethyl and a synthesis method thereof, and belongs to the technical field of organic synthesis. The dihydropyrroloquinazolinone compound containing trifluoromethyl of the present invention is prepared by a free radical tandem cyclization reaction of CF3Br and N-cyano-N-alkenylamide in an organic solvent under visible light induction and the presence of a photocatalyst and a base. The present invention is the first to regulate the regioselectivity of the substrate under photocatalysis, directly introduce the trifluoromethyl group into the dihydropyrroloquinazolinone ring, and obtain a trifluoromethyl-substituted dihydropyrroloquinazolinone, which can be further used to prepare drugs with anti-Alzheimer's disease. The present invention provides a new method for the synthesis of functionalized dihydropyrroloquinazolinone compounds, which has the advantages of cheap and readily available raw materials, short reaction steps, high regioselectivity of the reaction, simple operation, mild reaction conditions, and good reaction yield.

The invention relates to a preparation method of a suvorexant intermediate, and belongs to the field of medical compounds. According to the invention, 2-bromo-5-methyl benzoic acid with low price is used as a reaction raw material, and the Ullmann coupling reaction can be carried out at a lower temperature by adding amine, amino acid or oxamide ligands, so that the yield and selectivity of the product are greatly improved, and the ratio of the product to a regioisomer is remarkably increased. The route is low in cost, high in yield, simple and convenient to operate, mild in reaction condition and safe, and better meets the requirements of industrial production.

The invention provides a preparation method of a micromolecular ALK kinase inhibitor (2-((5-chloro-2-((2-methoxy-4-(9-methyl-3, 9-diazaspiro [5.5] undecyl-3-yl) phenyl) amino) pyrimidine-4-yl) amino) phenyl) dimethyl phosphine oxide (compound I), and the method has the advantages of mild reaction conditions and high yield and purity, and is suitable for industrial production.

The present invention discloses a portable hydrogen generating device based on water free radical cations, and the technical scheme thereof is as follows: comprising a housing, a power source, a reaction chamber with an air inlet and an air outlet, a benzene generator for generating a benzene gas flow, and a deionized water generator for generating a deionized water gas flow, wherein the benzene generator and the deionized water generator are both connected to the air inlet of the reaction chamber, an anode plate and a cathode plate are respectively provided on both sides of the reaction chamber, a plurality of corona needles arranged toward the cathode plate are provided on the anode plate, and the anode plate and the cathode plate are both connected to the power source. Compared with the prior art, the hydrogen generating device of the present invention is easy to use, the conditions required for the preparation of hydrogen are simple, the hydrogen production concentration is high, the energy consumption is low, dry burning does not occur, and the safety is good.

The invention discloses a preparation method of an intermediate of macloxvir. The preparation method comprises the following steps: step 1, carrying out halogenation reaction; step 2, elimination reaction; step 3, addition reaction; step 4, ring closing reaction; the starting raw materials, the solvent and the catalyst selected in the invention are industrial-grade cheap and easily available products, have the advantage of low production raw material cost, and provide economic feasibility support for industrial large-scale production; reaction conditions of each step in the reaction process are mild, byproducts are few, the yield is high, and a target product can be prepared more efficiently; meanwhile, the synthesis route is high in atom utilization rate and excellent in atom economy, the used solvent and reagent are high in stability and easy to recycle and reuse, generation and emission of industrial three wastes are greatly reduced, the environment-friendly treatment cost is reduced, and the concept of green chemistry and sustainable development is met; the method gives consideration to economy, high efficiency and environmental friendliness, and solves the problems of low yield, violent reaction conditions and high cost of raw materials and auxiliary materials in the existing method.

The invention discloses a method for preparing cyclopropanecarboxylic acid by using phosphorus trichloride as a chlorination reagent, and belongs to the technical field of medicines and pesticides, the method comprises the following steps: adding cyclopropanecarboxylic acid into a reactor, starting stirring, heating to the reaction temperature of 40-60 DEG C, introducing nitrogen to carry out nitrogen replacement, carrying out nitrogen sealing in the whole process, starting dropwise adding phosphorus trichloride, controlling the dropwise adding speed, and reacting for 1-2 hours; the temperature of the reaction system is maintained at the reaction temperature, and the fluctuation temperature does not exceed + / -2 DEG C; after the dropwise adding of the phosphorus trichloride is finished, continuously carrying out heat preservation reaction for 0.5-2 hours, and then standing and separating the reaction liquid to obtain an upper layer which is a cyclopropanecarbonyl chloride crude product; and distilling the crude product of cyclopropanecarbonyl chloride to obtain a refined product of cyclopropanecarbonyl chloride. The method provided by the invention solves the problems of low chlorine atom utilization rate, incomplete catalysis of the adopted catalyst, easy generation of impurities, generation of toxic by-products sulfur dioxide and carbon monoxide, great threat to the environment, and three-waste emission in the existing acyl chloride preparation method.

This invention discloses an axially chiral 1,4'-biquinolinone and its derivatives, and a synthetic method thereof. The method uses MBH carbonate and quinoline-2(1 H Using β-ketones as raw materials, (DHQD)₂PYR as catalyst, and DME as solvent, a centrally chiral β-substituted allyl intermediate was synthesized; then, using iron powder as a reducing agent and acetic acid as solvent, enantiomeric enriched centrally chiral γ-lactam compounds were obtained; finally, using DBN as a base and DME as solvent, enantiomeric enriched compounds were obtained. (S) -Axial chiral 1,4'-biquinolinone or its derivatives. The method of this invention has mild reaction conditions, readily available raw materials, high enantioselectivity of the product, and excellent yield. The synthesized 1,4'-biquinolinone or its derivatives can be further used to synthesize novel substituted quinolinone phosphonate compounds, and to synthesize drugs with antibacterial, antimalarial, anticancer, antitumor, or herbicidal activities, showing broad application prospects.

The application discloses a preparation method of a metal catalyst material and application of the metal catalyst material in controllable degradation of polysaccharides, and the preparation comprises the following steps: mixing and reacting a ligand material with a metal ion solution, solid-liquid separation, washing, and drying; grinding the dried solid into powder, and then high-temperature calcining to obtain a metal monatomic catalyst, namely the metal catalyst material; or uniformly mixing and grinding the obtained metal monatomic catalyst with a metal organic framework material, and then high-temperature calcining to obtain a composite metal catalyst material. The metal catalyst material prepared by the application can make up for the limitations of Fenton oxidation principle in degrading polysaccharides, such as large iron consumption, strong pollution, and difficult control, and can avoid the adverse effects caused by the corrosiveness of hydrogen peroxide in actual production and operation. Different molecular weight polysaccharides can be obtained by adjusting the proportion and dosage of the metal catalyst material, the method can prepare polysaccharides with different molecular weights, and the prepared polysaccharides have good uniformity.

The invention provides a preparation method of gemcitabine hydrochloride, and belongs to the technical field of medicine synthesis. The preparation method of gemcitabine hydrochloride comprises the following steps: firstly, carrying out condensation reaction on a compound in a formula I and protected cytosine II to obtain a gemcitabine hydrochloride compound III; the method comprises the following steps: synthesizing a gemcitabine hydrochloride compound III (alpha / beta configuration mixture), splitting the synthesized gemcitabine hydrochloride compound III (alpha / beta configuration mixture), and carrying out configuration conversion on a key compound III (alpha / beta configuration mixture) in a splitting mother solution by adopting a continuous flow technology to realize recovery of an alpha configuration product, so that the purity and yield of the gemcitabine hydrochloride compound III beta are improved, and the method is suitable for industrial production. And thus, high-quality gemcitabine hydrochloride is obtained. The purity of the key compound is improved through resolution and configuration transformation, and the purity reaches 99.2% after resolution. The gemcitabine hydrochloride is prepared from the high-purity key compound III, so that the product purity is high; the product loss is reduced, and the product yield is improved.

The invention relates to the technical field of fine chemical engineering, in particular to a method for high-temperature and high-pressure catalytic synthesis of 4, 6-dichloropyrimidine by using a composite catalyst, which at least comprises the following steps: S1, mixing 4, 6-dihydroxypyrimidine, a solvent, triphenylphosphine oxide, a metal catalyst and an organic nitrogen-containing catalyst to obtain a material suspension; s2, dissolving solid triphosgene with an organic solvent to obtain a triphosgene solution; s3, dropwise adding the triphosgene solution into the material turbid liquid for reaction, and filtering, desolventizing and distilling the reacted material to obtain the 4, 6-dichloropyrimidine, so that the defects of slow reaction, low atom utilization rate and high cost of the existing triphosgene method for synthesizing the 4, 6-dichloropyrimidine are overcome, phosphorus-containing wastewater is avoided, an acid-binding agent is not needed, and the method is suitable for industrial production. And large-scale industrial popularization and application are easy to realize.

The invention relates to the technical field of organic synthesis, and discloses a synthesis method of (E)-2-methyl-alpha-methoxyimino methyl phenylacetate. According to the invention, o-methyl phenylacetonitrile is used as a raw material, and a series of steps such as oximation, first methylation, alkaline hydrolysis, second methylation and acidic rearrangement are carried out to obtain (E)-2-methyl-alpha-methoxyimino methyl phenylacetate. According to the method provided by the invention, the byproduct salt amount is greatly reduced, and the atom utilization rate is greatly improved; the organic solvent dosage is reduced, and the equipment utilization rate is greatly improved; according to the method, methylation reaction conditions are optimized, high reaction activity is obtained while the use amount of a methylation reagent is reduced, meanwhile, excessive methane chloride needing to be recycled is greatly reduced due to the fact that the use amount of methane chloride is reduced, the tail gas treatment amount is small, equipment is relatively simple, and the operation cost is low; besides crystallization operation, the whole reaction process is gas-liquid or liquid-liquid reaction, so that the mass and heat transfer effect is improved, and subsequent continuous transformation is facilitated.

The application discloses a kind of carbon black supported iron manganese composite oxide cluster catalyst's Joule heat preparation method and its application in electrocatalytic nitrate reduction preparation ammonia, belong to electrocatalytic ammonia preparation technical field.The catalyst Ketjenblack EC-600JD carbon black is used as carbon carrier, iron manganese composite oxide cluster is uniformly dispersed on the surface of carbon carrier, and the carbon carrier is worm-like mesoporous structure, with high specific surface area and high defect concentration.The application uses sodium citrate as complexing agent, acetylacetone iron and manganese acetate as metal precursor, after complexing, loading, gelation, freeze drying, the target catalyst is prepared by Joule heat instantaneous heat treatment under nitrogen atmosphere;The preparation process has high heat conversion efficiency, low energy consumption, can realize atomic dispersion of iron manganese composite oxide cluster, effectively improves the exposure degree of catalytic active site.The catalyst shows high catalytic activity, high selectivity and excellent stability in electrocatalytic nitrate reduction preparation ammonia reaction, and the ammonia preparation faraday efficiency can reach more than 85%, and the preparation process does not need noble metal and toxic reagent, and the process is green and efficient, easy to scale production, can efficiently convert nitrate wastewater into ammonia, with environmental governance and nitrogen resource recycling value.

The invention relates to a palladium-copper bimetal-based nano-catalyst as well as a preparation method and application thereof, and belongs to the technical field of metal-based catalysts. The problems of low carbon dioxide conversion rate, low selectivity of low-carbon alcohol and the like in the existing technology for converting carbon dioxide into low-carbon alcohol with high added value are solved. The palladium-copper bimetallic-based nano-catalyst is prepared through a step-by-step reduction method, firstly, a palladium precursor is reduced into palladium nano-particles through a reducing agent I, the palladium nano-particles are deposited on an oxide carrier, then, a copper precursor is deposited on the surfaces of the palladium nano-particles through a reducing agent II, and finally the palladium-copper bimetallic-based nano-catalyst is obtained. The preparation method is simple in operation process, convenient to operate and wide in applicability, the prepared catalyst is high in activity, good in stability and high in atom utilization rate, and when the catalyst is applied to the reaction for preparing the low-carbon alcohol through carbon dioxide hydrogenation, the conversion rate of carbon dioxide is high, and the selectivity of the low-carbon alcohol is high.

This invention provides a method for manufacturing dibenzylamine. Benzonitrile and a reaction solvent are mixed in a high-pressure reactor, and a hydrogenation reaction is carried out under the action of a ruthenium-iron bimetallic catalyst supported on cerium oxide to obtain a crude product. After cooling and filtering the catalyst, the crude product is purified by distillation to obtain the final dibenzylamine. This method features mild reaction conditions, high atom utilization, and meets the requirements of clean and green production.

The invention discloses a method for synthesizing 2-phenylpropionic acid through reaction of styrene and carbon dioxide under the catalysis of nickel, which comprises the following steps: adding styrene, a nickel compound, an organic ligand and manganese into a reactor, reacting with carbon dioxide in an organic solvent medium at a certain temperature and pressure, then adding diluted hydrochloric acid, and stirring at normal temperature to complete the reaction, and extracting the reaction mixed solution with an organic extractant to separate out an organic phase, and carrying out reduced pressure distillation on the organic solvent on the organic phase to obtain 2-phenylpropionic acid. According to the invention, styrene is taken as a raw material, under the action of the nickel compound catalyst, direct carboxylation reaction of styrene and carbon dioxide is effectively realized, and compared with the traditional oxidation, hydrolysis and other multi-step carboxylic acid preparation methods, the method provided by the invention has the advantages of high atom utilization rate, simple technical process and other industrial application sustainable development characteristics; particularly, the atom economy of the synthetic reaction is highlighted by recycling the carbon dioxide.

The application belongs to the field of agricultural chemistry, and particularly relates to an activator based on structural modification of L-methionine and a synthesis method and application thereof; the application takes L-methionine as a core raw material, which is of natural origin, cheap and easy to obtain and excellent in biocompatibility, and performs structural modification through one-step esterification to synthesize a target compound 2-(diethylamino)ethyl-L-methionine ester; biological activity experiments prove that the compound can effectively promote the germination rate of crops at a low concentration, significantly optimize the growth state of roots and stems, and greatly enhance the stress resistance potential of seedlings; in addition, the compound has outstanding industrialization advantages, and is simple in production process, controllable in raw material cost and excellent in water solubility, with a solubility in water of greater than or equal to 30 g / L at 25 DEG C, so that it can be mass-produced without complex post-treatment, thereby not only effectively reducing the input cost of agricultural production, but also significantly improving the yield and quality of crops, and providing a new path for the development of green and environmentally-friendly plant growth activators.

The invention relates to a copper monatomic carbon dot nano-enzyme with SOD (superoxide dismutase) enzyme activity as well as a preparation method and application thereof. The copper monatomic carbon dot nano-enzyme with the SOD enzyme activity is obtained by loading copper monatomic on the surface of a nitrogen-doped carbon quantum dot, and the copper monatomic is dispersed on the surface of the nitrogen-doped carbon quantum dot in the form of Cu < 2 + >. Various asymmetric C and N sites exist on the surfaces of the nitrogen-doped carbon quantum dots, the existence of N is beneficial to promoting Cu < 2 + > dispersion and reducing Cu < 2 + > agglomeration, stable Cu < 2 + > atomic-scale dispersion is realized through coordination of N and Cu < 2 + >, and the high activity, the stability and the metal economy of the copper monatomic carbon dot nano-enzyme with the SOD enzyme activity are ensured.

The invention belongs to the field of chemical engineering, and particularly relates to an ultralow-platinum-doping Raney type catalyst for hydrosilylation as well as a preparation method and application of the ultralow-platinum-doping Raney type catalyst. The catalyst disclosed by the invention is obtained by crushing and leaching the ternary metal alloy, so that the interaction between platinum atoms and skeleton metal is stronger, active metal is more beneficial to adsorption and conversion of reactant molecules in catalysis, and the activity of the catalyst is remarkably improved; and common catalyst sintering and aggregation in the traditional supported catalytic reaction are effectively avoided. The invention also provides a room-temperature hydrosilylation method, which comprises the following steps: placing the ultralow-platinum-doping Raney type skeleton catalyst, unsaturated alkane and hydrogen-containing silane in a reaction tube, and reacting at room temperature to obtain a corresponding product.

In order to reduce the use amount of raw material methanol, improve the atom utilization rate and reduce byproduct chloromethane and the like, the invention discloses a process, a system and a control system for efficiently preparing dimethyl phosphite, and belongs to the technical field of synthesis of intermediate dimethyl phosphite of pesticide glyphosate. Wherein water and methanol are jointly used as raw materials (one molecule of water is used for replacing one molecule of methanol), the use amount of methanol is reduced, meanwhile, the byproduct chloromethane is greatly reduced, and the atom utilization rate is increased; a continuous flow reactor, a gas-liquid separator and the like are adopted, so that the whole reaction system is in a state from normal pressure to micro-positive pressure, the negative pressure state of a traditional kettle type continuous reactor is replaced, the reaction system does not need to use a vacuum pump, and the power consumption is greatly reduced; in addition, by controlling temperature, pressure, flow and the like, continuity, orderliness and controllability of the preparation process are guaranteed.

This invention discloses a parallel-interface engineered viologen-based defective carbon nitride composite material, its preparation method, and its applications, belonging to the field of energy catalysis and photochemical materials technology. The material comprises: a defective graphitic carbon nitride support; single-atom platinum catalytic sites supported on the support; and a selenium-containing viologen compound anchored by covalent bonds in a configuration parallel to the support surface. Through a bilateral covalent bonding strategy, viologen molecules are stably anchored in a parallel configuration to the single-atom platinum-modified defective carbon nitride surface, constructing a highly efficient and stable "electron bridge" structure, significantly enhancing interfacial bonding and photogenerated electron transport efficiency. This composite material exhibits excellent photocatalytic hydrogen evolution activity and efficient coupling ability with benzylamine oxidation under visible light, and its activity retention rate reaches over 92% after 144 hours of cycling. It provides a new paradigm for solving the problem of poor interfacial stability in photocatalysts and has significant application prospects in the field of solar fuel synthesis.

The invention discloses an electrochemical preparation method of tris (1, 1, 1, 3, 3, 3-hexafluoro-2-propyl) phosphite, and belongs to the technical field of electrolysis processes for producing compounds. The method comprises the following steps: mixing white phosphorus, hexafluoroisopropanol, an activation additive, an organic alkali, an electrolyte and an organic solvent to form an electrolytic reaction solution; the electrolytic reaction solution is electrolyzed under the action of direct current, white phosphorus is oxidized at an anode and then subjected to nucleophilic attack by hexafluoroisopropanol to generate tri (1, 1, 1, 3, 3, 3-hexafluoro-2-propyl) phosphite, and hydrogen atoms are reduced at a cathode to form hydrogen. The method has the advantages of simplicity, convenience, rapidness, high safety, few byproducts, high utilization value and low cost; the method is high in atom utilization rate and weak in corrosion to devices, meets the requirements of green and safe production, and has a good industrial application prospect.