92 results about "Palladium chloride" patented technology

The invention belongs to the technical field of conductive microsphere preparation, and particularly relates to a preparation method and application of conductive microspheres with convex particles on the surfaces. The preparation method comprises the following steps: acidizing resin microspheres by using imidazole disulfate ionic liquid, and combining the acidized resin microspheres with aminated activated carbon through chemical bonds to obtain microspheres with convex particles on the surfaces; and sequentially carrying out stannous chloride sensitization, palladium chloride activation and chemical nickel plating on the microspheres with the convex particles on the surfaces to obtain the conductive microspheres with the convex particles on the surfaces. The conductive microspheres with the raised particles on the surfaces can generate more and more effective local contact points in the crimping process, so that the connection resistance is obviously reduced, and the excellent conductive performance is realized.

The invention discloses a silver-coated copper powder preparation method based on nickel layer enhanced palladium catalysis and active hydrogen synergistic deposition, and relates to the technical field of powder surface treatment. The method specifically comprises the following steps that copper powder is soaked in acid liquor, then filtering, washing and drying are conducted, and pretreated copper powder is obtained; immersing the pretreated copper powder into a hydrochloric acid solution of nickel chloride hexahydrate, and then filtering, washing and drying to obtain sensitized copper powder; immersing the sensitized copper powder into a hydrochloric acid solution of palladium chloride, and then filtering, washing and drying to obtain activated copper powder; mixing the activated copper powder with the reduction solution to obtain a solid-liquid mixture, adding a silver-ammonia solution into the solid-liquid mixture, heating for reaction, and filtering after the reaction is finished to obtain a solid product; and washing and drying the solid product to obtain the silver-coated copper powder based on nickel layer enhanced palladium catalysis and active hydrogen synergistic deposition. The silver-coated copper powder with a compact silver layer and high binding force is prepared through the ternary synergistic effect of nickel layer sensitization, palladium nanometer activation and formaldehyde reduction.

The invention relates to the technical field of organic synthesis, in particular to 4-chloro-1-methyl-6H-heterochromene [3, 4-c] pyridine as well as a synthesis method and application of the 4-chloro-1-methyl-6H-heterochromene [3, 4-c] pyridine. The synthesis method comprises the following steps: (1) synthesizing 2-chloro-3-fluoro-4-iodine-5-methylpyridine from 2-chloro-3-fluoro-5-methylpyridine and an iodine elementary substance to obtain 2-chloro-3-fluoro-4-iodine-5-methylpyridine; (2) synthesizing 2-(2-chloro-3-fluoro-5-methylpyridine-4-yl) benzaldehyde from the 2-chloro-3-fluoro-4-iodo-5-methylpyridine, the 1, 1-bis (diphenylphosphine) ferrocene palladium dichloride, the tripotassium phosphate and the (2-formyl phenyl) boric acid, and further synthesizing the 2-(2-chloro-3-fluoro-5-methylpyridine-4-yl) benzaldehyde from the 2-chloro-3-fluoro-4-iodo-5-methylpyridine and the 1, 1-bis (diphenylphosphine) ferrocene palladium dichloride. And (3) synthesizing the 4-chloro-1-methyl-6H-heterochromene [3, 4-c] pyridine by using the 2-(2-chloro-3-fluoro-5-methylpyridine-4-yl) benzaldehyde and sodium tert-butoxide. The 4-chloro-1-methyl-6H-heterochromene [3, 4-c] pyridine compound constructed by the invention can be used for detecting the content of pesticide residue glyphosate.

The invention relates to the technical field of new energy chemical catalysis, in particular to a catalyst for preparing formaldehyde through photo-thermal catalysis of methane under gas-solid continuous flow as well as a preparation method and application of the catalyst. The preparation method comprises the following steps: S1, preparing a pretreatment carrier; s2, preparing a precursor solution: S201, adding a palladium chloride solution into the zinc oxide suspension, stirring at room temperature, carrying out vacuum suction filtration, washing and drying to obtain a Pd / ZnO precursor; s202, dispersing the Pd / ZnO precursor in deionized water, adding rare earth metal salt, dropwise adding triethylene tetramine, stirring, and adding sodium hypophosphite to obtain a precursor solution; s3, preparing a composite precursor; and S4, carrying out post-treatment. The invention provides a catalyst for preparing formaldehyde through photo-thermal catalysis of methane under gas-solid continuous flow as well as a preparation method and application of the catalyst, and aims at solving the problems that in related technologies, the activation difficulty of methane C-H bonds is high, formaldehyde is prone to deep oxidation, and the operation efficiency of the catalyst in a gas-solid continuous flow system is low.

A method for recovering platinum group precious metal in a silicon carbide DPF catalyst comprises the steps that S1, smelting treatment is conducted, specifically, the silicon carbide DPF catalyst is crushed and then mixed with a smelting agent in a layered mode, a smelting reaction is conducted at the high temperature, and the smelting agent is composed of sodium carbonate and sodium peroxide; s2, leaching and separation are conducted, specifically, after the smelting product obtained in the step S1 is cooled, acid leaching treatment is conducted through hydrochloric acid, leaching liquid containing platinum group precious metal and residues are obtained through filtering separation, the residues are washed, and washing liquid is added into main leaching liquid; and S3, precious metal enrichment is conducted, specifically, the leachate obtained in the step S2 is enriched through a chemical precipitation method, the obtained precipitate is dissolved with aqua regia, and a platinum-palladium chloride mixed solution is obtained. The method is high in recovery rate, and under the optimal condition, the recovery rate of platinum can reach 91% or above, and the recovery rate of palladium can reach 96% or above; the process is simple, the cost is controllable, the used smelting agent is a common chemical raw material, and the cost is low.

The utility model discloses a blocky palladium chloride crushing device, which relates to the technical field of crushing devices and comprises a crushing bin, a feeding hopper is mounted at the upper end of the crushing bin, a rotating hole is formed in one end of the feeding hopper, a groove roller is mounted at the middle end of the rotating hole, and a convex groove roller is mounted at one end of the rotating hole. A roller connecting motor is installed at one end of the convex groove roller, a collecting hopper is installed at the lower end of the material crushing bin, a bottom motor is installed at the lower end of the collecting hopper, a hammer connecting shaft is installed at the upper end of the bottom motor, and a material crushing hammer is installed at the upper end of the hammer connecting shaft. Through the arrangement of the material crushing bin, the feeding hopper, the groove roller, the convex groove roller, the hammer connecting shaft and the material crushing hammer, blocky palladium chloride is fed into the hopper, the convex groove roller is driven by the roller connecting motor to rotate, and the blocky palladium chloride is primarily extruded and crushed through a gap between the convex groove roller and the groove roller; and then the bottom motor drives the hammer connecting shaft and the material crushing hammer to rotate and grind in the material crushing bin, so that the crushing efficiency of the device is improved.

The application discloses a preparation method of a phenylacetic acid compound, and particularly, the application uses a substituted or unsubstituted aromatic hydrocarbon as a starting material, and under the action of a palladium catalyst (such as palladium acetate, palladium on carbon, palladium chloride, tetra-triphenyl palladium, etc.), the starting material is reacted with formaldehyde, HCl (aq) and CO to efficiently generate the phenylacetic acid compound. The method disclosed by the application only needs to start from the aromatic hydrocarbon, greatly reduces the difficulty and cost of obtaining the raw material, and avoids stimulating, sensitizing or toxic raw materials. Compared with the prior art, the method disclosed by the application has the advantages of simplicity and efficiency, cheap and easy-to-obtain raw materials, high atomic economy, high yield, green and pollution-free, easy industrialization and the like.

The application discloses a sulfuric acid acidified palladium carbon catalyst and a preparation method and application thereof, and the preparation process of the catalyst comprises the following steps: sulfuric acid acidification of activated carbon, washing, preparation of a palladium chloride hydrochloride solution as a precursor, preparation of a suspension of the sulfuric acid acidified activated carbon in deionized water, dropwise addition of the palladium chloride hydrochloride solution into the suspension of the sulfuric acid acidified activated carbon, vigorous stirring, filtration, vacuum drying, and obtaining of the sulfuric acid acidified palladium carbon catalyst, and application of the catalyst to preparation of 2,5-dimethyltetrahydrofuran. The application self-prepares a high-efficiency sulfuric acid acidified palladium carbon catalyst to catalyze a reaction, the catalyst has good circulation stability, and has the advantages of simple reaction, low reaction temperature, easy separation of a product, high yield and the like.

The invention provides a preparation process of palladium chloride dihydrate, which comprises the following steps: S1, respectively adding palladium powder, high-purity water and a reducing agent into a reactor, stirring and heating, and carrying out constant-temperature reaction and standing for layering to obtain activated palladium powder; s2, hydrochloric acid is added into the activated palladium powder, then stirring and heating are conducted, hydrogen peroxide is dropwise added, a reaction is conducted till the palladium powder is completely dissolved, and a dissolved solution is filtered; s3, transferring the filtrate into an evaporator for dissolving, and then carrying out vacuum concentration; s4, repeating the step S3 for 3-5 times until the pH value of the solution reaches 1-5.5; and S5, carrying out vacuum concentration on the solution, and obtaining palladium chloride dihydrate when the palladium content reaches a set value. The direct recovery rate of the preparation process is high, the raw material loss can be effectively reduced, the production benefit is improved, the operation process is simple, and the prepared palladium chloride dihydrate has the nitrate-free characteristic, also has good water solubility and can meet the use requirements in different scenes.

The present application relates to the technical field of catalytic materials, and discloses a halloysite nanotube loaded palladium-platinum bimetallic alloy catalyst and a preparation method thereof, the catalyst comprising heat pretreated halloysite and uniformly dispersed palladium-platinum bimetallic alloy particles, and the mass ratio of palladium, platinum and heat pretreated halloysite being 0.012-0.022:0.012-0.022:1. The preparation method comprises mixing the heat pretreated halloysite with palladium chloride and chloroplatinic acid hexahydrate, adding concentrated ammonia water to adjust the pH to 9-11 to form an ammonia complex; obtaining a precursor through a hydrothermal reaction, and adding sodium borohydride for liquid phase reduction. The bimetallic alloy phase produces geometric and electronic synergistic effects, thereby reducing the reaction activation energy; the ammonia complex ion is chemically bonded with the hydroxyl group of the carrier to prevent the loss of active components in the hydrothermal environment. The catalyst is combined with glycerol to produce hydrogen in situ, thereby avoiding the safety hazards and equipment investment of external high-pressure hydrogenation, and realizing the high-yield conversion of green diesel under extremely low noble metal loading.

The invention relates to the technical field of waste liquid treatment, in particular to a cyclic utilization method and application of palladium in a circuit board ion palladium waste liquid. Comprising the following steps: S1, separating metal impurities from the palladium waste liquid to obtain feed liquid I; s2, carrying out palladium ion concentration on the feed liquid I to obtain feed liquid II; s3, reducing the feed liquid II to generate a palladium monomer, and collecting palladium powder; and S4, taking palladium powder to react with an oxidizing agent in an acidic medium to obtain a salt solution containing palladium ions. According to the method, an ion exchange resin adsorption separation method and a liquid membrane extraction method are combined, on one hand, the content of metal impurities in the palladium recovery process is reduced, and the recovery purity of the metal palladium is guaranteed; on the other hand, the recovery rate of metal palladium is effectively increased; the purity of the palladium chloride prepared by the method is up to 98% or above, the quality of the synthesized colloidal palladium activating solution is stable, a closed-loop recovery and utilization process mode can be realized, and the application prospect is wide.

The invention discloses an alpha-fluoro alpha, beta-unsaturated amide derivative as well as a synthesis method and application thereof. The preparation method comprises the following steps: by taking amyl-1, 1, 2-trifluoro-1, 4-diene which is simple and convenient to prepare and a cheap and abundant amine compound as raw materials, an allyl palladium chloride dimer as a transition metal catalyst, 1, 4-bis (diphenylphosphine) butane as a ligand and 2, 5-di-tert-butylbenzoquinone as an oxidant, reacting in an organic solvent at a proper temperature under a nitrogen condition, thereby obtaining the 1, 1, 2-trifluoro-1, 4-diene compound. The alpha-fluoro alpha, beta-unsaturated amide derivative is obtained with good yield, and the structural formula of the derivative is shown in the specification. The synthesis method disclosed by the invention has the characteristics of simplicity and convenience in operation, mild conditions, greenness, economy, wide substrate compatibility, high chemical selectivity and high regioselectivity, and solves the technical problem that the synthesis conditions of the alpha-fluoro-alpha, beta-unsaturated amide derivative are complicated and harsh. Meanwhile, the alpha-fluoro drug molecules can be efficiently and highly selectively obtained, and the method has a wide application prospect.

The invention discloses a catalytic synthesis method of methyl nitrite, belongs to the technical field of methyl nitrite synthesis, and is used for solving the technical problem that the selectivity of catalytic synthesis of methyl nitrite in the prior art needs to be further improved. The catalytic synthesis method specifically comprises the following steps: adding lanthanum nitrate, copper nitrate, palladium chloride and deionized water into a beaker; the preparation method comprises the following steps: adding amino graphene and aluminum silica gel into a reaction kettle, stirring at room temperature for 10-20 minutes, adding ethylene glycol, continuously stirring for 15-30 minutes, adding a composite carrier into a system, adjusting the pH value to 3-4 by using saturated dilute nitric acid, heating to 50 DEG C, reacting for 12-15 hours, and performing post-treatment to obtain the modified catalyst. The reaction conversion rate, selectivity and catalyst stability are improved.

The invention discloses a preparation method and application of a composite electrode for removing chlorinated PPCPs in water through electro-catalytic hydrodechlorination, and the preparation method of an electrochemical cathode comprises the following steps: placing foamed nickel in a mixed solution of nickel nitrate hexahydrate and manganese sulfate for electro-deposition, and after the reaction is finished, drying the foamed nickel to obtain a NiMn-LDH / NF electrode, and placing the NiMn-LDH / NF electrode and anhydrous sodium hypophosphite in a tubular furnace, carrying out calcination phosphorization in a nitrogen atmosphere, placing the electrode in a mixed solution of palladium chloride and sodium chloride, and carrying out electro-deposition palladium loading to finally obtain the Pd / NiMn-LDH-Ov / NF composite electrode. The Pd / NiMn-LDH-Ov / NF composite electrode prepared by the method has good electro-catalytic performance, the removal rate of losartan potassium can reach 96.45%, meanwhile, the Pd / NiMn-LDH-Ov / NF composite electrode has excellent recycling performance, and secondary pollution is avoided.

The invention discloses a preparation method of a magnetic metal composite nanomaterial. The invention relates to a preparation method of a metal palladium-iron nano material. The preparation method comprises the following steps: adding spherical nano ferroferric oxide powder into a solvent (water, ethanol, acetonitrile, methylbenzene and the like), carrying out ultrasonic reaction for half an hour, adding pentacarbonyl iron (1-10mmol / L) and palladium compounds (0.1-1mmol / L, palladium chloride, palladium nitrate, palladium sulfate, palladium acetate, bis (dibenzylideneacetone) palladium, bis (acetonitrile) palladium dichloride and the like, and the ratio of the amount of substance of the palladium element to the amount of substance of all iron elements is 0.01-0.1), sealing a reaction container, carrying out ultrasonic reaction for half an hour, and cooling to room temperature to obtain the spherical nano ferroferric oxide. Reacting at 80 DEG C for 2 hours, opening the reaction container, cooling to room temperature, and continuously reacting for 2 hours; and centrifuging the obtained reaction liquid to obtain brown solids, washing the brown solids, and carrying out vacuum drying on the obtained black solids to obtain black powder, namely the palladium-iron composite nanomaterial loaded on the spherical ferroferric oxide. The composite material obtained according to the method is good in dispersity and uniform in particle size, and the size is intensively distributed between 2 nm and 3 nm.

The invention belongs to the technical field of catalyst preparation and application, and particularly relates to a method for large-scale preparation of a supported palladium monatomic catalyst and application of the catalyst in production of hydrogen peroxide by an anthraquinone method. The preparation method comprises the following steps: dissolving palladium chloride and an aryl complex or a palladium amine complex in a mixed organic solvent; then dipping with a gamma-Al2O3 microsphere carrier with a specific crystal phase according to a certain mass ratio; then reducing a palladium monatomic precursor in situ through an ultraviolet irradiation method; and carrying out medium-low temperature hydrogenation to obtain the supported palladium monatomic catalyst. The large-steric-hindrance monatomic dispersion technology and in-situ carrier regulation and control are combined, large-scale production of the catalyst is achieved, and the obtained catalyst has high activity, high dispersity and excellent mechanical property and stability, is suitable for hydrogenation reaction in anthraquinone process hydrogen peroxide production, and has wide application prospects. The equivalent hydrogenation efficiency can be improved, and the production cost of the catalyst can be reduced.

This invention discloses a catalyst for the synthesis of indoxacarb intermediates and its preparation method, belonging to the field of precious metal catalyst preparation technology. The preparation method includes the following steps: S1, adding a surfactant and 1-2 mol / L hydrochloric acid to an aqueous ethanol solution to obtain solution A; adding an aminosilane coupling agent and tetraethyl orthosilicate to the aqueous ethanol solution for hydrolysis to obtain solution B; mixing solutions A and B, then adding an ethanol solution of modified phenolic resin, reacting, washing, and freeze-drying to obtain a solid; S2, subjecting the solid obtained in S1 to low-temperature thermosetting, followed by calcination under an inert atmosphere to obtain a support; S3, mixing the support with a palladium chloride solution, shaking at room temperature, drying, and reducing under hydrogen to obtain the catalyst. This invention, through a three-step synergistic process, ultimately enables the catalyst to exhibit high activity and high selectivity in the synthesis of indoxacarb intermediates.

The application provides a palladium-based composite metal oxide semiconductor material and a preparation method thereof and a hydrogen sensor. The preparation of the palladium-based composite metal oxide semiconductor material comprises the following steps: separating and drying a material after a hydrothermal reaction of tin dichloride, urea and nickel nitrate in deionized water to obtain a composite metal oxide; dispersing the composite metal oxide in deionized water, then adding palladium chloride and a reducing agent to perform a reaction; and separating and drying the material after the reaction to obtain the palladium-based composite metal oxide semiconductor material. The mass ratio of the tin dichloride, the nickel nitrate and the palladium chloride is (17-100):(0.05-3):1. The mass ratio of the tin dichloride and the urea is 1:(0.2-1). The palladium-based composite metal oxide semiconductor material prepared by the application has high hydrogen-sensitive selectivity, can quickly detect hydrogen with a low hydrogen concentration, has excellent detection stability, and can be widely used for preparing hydrogen sensors.

The application discloses a preparation method and application of a hollow conjugated microporous polymer. It belongs to the field of photocatalytic organic synthesis and comprises the following steps: step S1, dispersing SiO2 nanosphere templates in a triethylamine solvent; step S2, adding 4,7-dibromo-2,1,3-benzothiadiazole, dichlorobistriphenylphosphine palladium and cuprous iodide; step S3, slowly adding a toluene solution of 1,3,5-triethynylbenzene; step S4, heating, stirring, washing, etching with a hydrofluoric acid solution, washing and drying to obtain the hollow conjugated microporous polymer. The hollow spherical structure of the hollow conjugated microporous polymer enhances light capture; high specific surface area and hierarchical pores promote mass transfer and active site exposure; the D-A type conjugated system constructed by BT units effectively narrows the band gap, expands the visible light response range and greatly improves the charge separation efficiency; and the all-organic composition makes the hollow conjugated microporous polymer environmentally friendly and relatively low in cost.

The invention discloses a synthetic method of an organic phosphine palladium G3 metal catalyst, and belongs to the technical field of metal complex catalysts, and the synthetic method comprises the following steps: in an argon atmosphere, carrying out stirring heating reaction on carbazole, 1, 5-cyclooctadiene palladium dichloride and sodium methanesulfonate in isopropanol; 2-dicyclohexylphosphine-2 ', 4', 6 '-triisopropyl biphenyl is added for a reaction, and after the reaction is stopped, filtering and recrystallization are performed to generate the target product organic phosphine palladium metal catalyst. According to the invention, carbazole is taken as a reaction raw material, a target product is synthesized in isopropanol by adopting a direct one-step method, the reaction temperature is lower, the reaction condition is milder, the operation is simpler and more convenient, the yield can reach more than 90%, and the method is very beneficial to actual industrial production.

The invention discloses a catalyst for synthesizing 1-butene through selective hydrogenation of butadiene as well as preparation and application of the catalyst. The catalyst is prepared by taking palladium chloride, a platinum-containing precursor, an iridium-containing precursor and silicon nitride as raw materials through a flame jet cracking method in one step, and the platinum-containing precursor, the iridium-containing precursor, the palladium chloride and the silicon nitride are fed according to the element molar ratio of Pt: Ir: Pd: N being 1: (1-1.5): 1: (77-163); wherein the molar weight of the N element is based on the total molar weight of the platinum-containing precursor, the iridium-containing precursor and the N element in the silicon nitride. A flame jet cracking device is used in the preparation process of the catalyst, and the catalyst is good in structural characteristic, high in component regulation and control performance, simple and convenient in preparation process, high in catalytic activity and good in stability.

The invention relates to the field of sodium ion batteries, and discloses an electrolyte for a sodium ion battery and a preparation method thereof, the electrolyte for the sodium ion battery comprises a sodium salt, an organic solvent and a composite additive; the composite additive is formed by mixing fluoroethylene carbonate and a modified additive according to the mass ratio of (1-3): 1; the modified additive is prepared by the following steps: reacting 2-cyano-6-hydroxybenzothiazole with liquid bromine to generate 2-cyano-6-hydroxy-5-bromobenzothiazole, then carrying out substitution reaction on phenolic hydroxyl group in the 2-cyano-6-hydroxy-5-bromobenzothiazole and diethyl chlorophosphate, and then under the catalysis of bis (triphenylphosphine) palladium dichloride and cuprous iodide, carrying out substitution reaction on the phenolic hydroxyl group in the 2-cyano-6-hydroxy-5-bromobenzothiazole and diethyl chlorophosphate to obtain the modified additive. According to the invention, the electrolyte with a good flame retardant effect is prepared by adding the modified additive, and the sodium-ion battery is endowed with good capacity performance and cycle performance by carrying out a coupling reaction on the prepared 2-cyano-6-diethyl phosphate 5-bromobenzothiazole and trimethylsilylacetylene.

This invention discloses a cell sample viability detection kit and method based on mass spectrometry flow cytometry. The cell sample viability detection kit based on mass spectrometry flow cytometry includes separately packaged solutions C, P, Pd, F, M, and D; solution C includes bovine serum albumin and phosphate buffer; solution P includes phosphate buffer; solution Pd includes palladium dichloride and double-distilled water. The effective component of palladium dichloride, palladium, has the following natural isotope abundances: isotope 102 The relative abundance of Pd was 1.02%. 104 Pd was 11.14%. 105 Pd is 22.33%. 106 Pd is 27.33%. 108 Pd was 26.46%. 110 Pd is 11.72%; Solution F includes paraformaldehyde and phosphate buffer; Solution M includes methanol; Solution D includes... 191 / 193 Ir, paraformaldehyde, and phosphate buffer. This invention's kit features high detection sensitivity, reduced detection interference, improved experimental efficiency, and reliable results.

This invention relates to a bipolar organic material, its preparation method, and its application in sodium-ion batteries, belonging to the field of organic electrode materials technology. The bipolar organic material is prepared from 4,4-dibromoazobenzene, 5,10-dihydrophenazine, 2-bicyclohexylphosphine-2',6'-diisopropoxybiphenyl (Ruphos), [2'-(amino)[1,1'-biphenyl]-2-yl][[2',6'-di(1-methylethoxy)[1,1'-biphenyl]-2-yl]dicyclohexylphosphine]palladium chloride (Ruphos Pd G2), and sodium tert-butoxide. Because the chemical structure of this material simultaneously contains substances that can react with sodium... + Azo units for reversible storage and for ClO4 ‑ The phenazine unit stores anions, thus exhibiting bipolar characteristics. When used as a cathode material in coin cells, it demonstrates excellent electrochemical performance. Its preparation method is simple, easy to operate, and suitable for large-scale industrial production.

The invention relates to the technical field of petrochemical engineering, and particularly discloses a preparation method of a high-performance palladium-based catalyst, according to the catalyst, monodisperse or near-monodisperse loading of Pd species can be achieved through the uniform dispersion effect of a sol-gel method and the auxiliary dispersion effect of a dispersing agent in the formula, and the catalyst has the high performance. The excellent catalytic effect can be achieved without increasing the loading capacity of palladium chloride, the dosage of palladium chloride can be reduced under the same catalytic activity requirement, precious metal resources are greatly saved, and the raw material cost of the catalyst is reduced; meanwhile, Pd species are uniformly dispersed, local aggregation and waste phenomena are avoided, and the precious metal utilization rate is high.

The invention relates to a preparation method of a chlorinated indolocarbazole compound, and belongs to the technical field of chemical synthesis. The preparation method comprises the following steps: in a reaction solvent and an alkali environment, controlling the reaction temperature and time, and reacting a reaction substrate under the condition of a bimetallic salt catalyst to obtain a chloroindolocarbazole compound product, the bimetallic salt catalyst comprises palladium salt and copper salt. The palladium salt is selected from at least one of palladium acetate and palladium chloride; the dosage of the palladium salt is 0.0005-0.01 times of the mole number of the reaction substrate. The copper salt is selected from at least one of copper powder, cuprous chloride, cuprous bromide, cuprous iodide and cuprous oxide; the dosage of the copper salt is 0.01-1 time of the mole number of the reaction substrate. When the chloroindolocarbazole structure is prepared, the dosage of the palladium catalyst can be remarkably reduced, no ligand is needed, the raw material conversion rate is high, post-treatment is simple and convenient, and the method is suitable for industrial production.

The application discloses a dual-functional catalytic material with a coating structure and a preparation method and application thereof. A silicon source is added into deionized water, mixed uniformly, then a structure directing agent is added, mixed uniformly, and then a cobalt acetylacetone ethanol solution is added to obtain a transparent solution; the transparent solution is crystallized to obtain a solid powder; palladium chloride and o-phenanthroline are dissolved in dimethyl sulfoxide, mixed uniformly to obtain a transparent solution; the solid powder is added into the transparent solution, mixed uniformly, and then heated to 80-120 DEG C, stirred for 6-12 hours, centrifuged, dried to obtain a powder, and the powder is calcined to obtain the dual-functional catalytic material with the coating structure. x The dual-functional catalytic material with the coating structure is constructed by a two-step ligand pyrolysis method, and the synergistic effect of the dual-functional catalytic material with the coating structure makes the dual-functional catalytic material have excellent ethyl acetate deep oxidation activity and stability.

The application belongs to the technical field of hydrogen peroxide preparation, and particularly relates to a method for efficiently and spontaneously preparing H2O2 by using low-valence element molybdenum and palladium. Molybdenum powder and palladium chloride are added into oxygen-containing water, and the strong reduction capacity of the molybdenum powder is used to reduce the palladium ions in the solution into palladium single substance and load the palladium single substance on the surface of the molybdenum powder. The molybdenum powder is used as a carrier and an electron donor, and the palladium single substance is used as an active site. Through the synergistic effect between the molybdenum powder and the palladium single substance, the oxygen widely existing in nature is reduced into H2O2. The method for preparing H2O2 is a spontaneous reaction occurring under natural conditions, does not need to input photoelectric energy, does not need to add complex chemical reagents, and can generate H2O2 only by oxygen, and has the excellent characteristics of convenient and efficient preparation of H2O2.

The application provides a gas sensor surface anti-interference coating, which comprises the following materials in parts by mass: nanometer silicon dioxide 5.5-10.5 parts, nanometer titanium dioxide 3.5-5.6 parts, nanometer tin dioxide 10-15.5 parts, palladium chloride substrate 1-2 parts and distilled water. The application also provides a preparation method of the gas sensor surface anti-interference coating, which comprises the following steps: mixing nanometer tin dioxide, nanometer silicon dioxide and nanometer titanium dioxide, grinding, sintering treatment, mixing the sintered nanometer composite material with a water solution of the palladium chloride substrate and a polar protic solvent, grinding again, drying treatment, removing the solvent, and forming a final gas sensor nanometer composite anti-interference material coating. The nanometer composite anti-interference material coating prepared by the application has strong adsorption capacity for interference substances of the gas sensor, meanwhile, the permeability of detection gases such as methane is not affected, the response voltage of the gas sensor to the interference substances is significantly reduced, the anti-interference capacity is improved, and the surface coating does not have a failure phenomenon.

The invention provides an F and Pd modified single crystal BiVO4 photocatalyst and application of the F and Pd modified single crystal BiVO4 photocatalyst to photocatalytic degradation of glyphosate and synergistic production of H2O2. The preparation method comprises the following steps: dispersing single crystal BiVO4 powder in a deionized water solution to prepare a suspension; adding a fluoride solution into the suspension, stirring for a certain time under illumination, washing and drying to obtain a photocatalyst (BiVO4-F-110) of which F <-> is modified on a crystal face (110) of a single crystal BiVO4 enriched photohole; the preparation method comprises the following steps: dispersing BiVO4-F-110 into a methanol aqueous solution, adding a certain amount of a palladium chloride aqueous solution, continuously introducing Ar, removing O2 dissolved in a suspension, and then carrying out light treatment under a stirring condition; and after illumination is finished, washing and drying the obtained precipitate to obtain the photocatalyst. F ions are selectively modified on the hole-rich crystal face of the single crystal bismuth vanadate, so that glyphosate adsorption can be promoted, photogenerated holes can be effectively captured, the Pd-loaded (010) crystal face can effectively enhance the reduction of O2 to produce H2O2, and the synergistic interaction of pollutant degradation and H2O2 synthesis is further realized.