37 results about "Hydrogen peroxide synthesis" patented technology

Provided in the present invention are a spherical catalyst for hydrogen peroxide synthesis via an anthraquinone process and a preparation method therefor, belonging to the technical fields of catalytic materials and catalyst preparation. The method comprises: reacting a first aluminum source, which has P123 mixed therein, with a precipitant to obtain an aluminum oxide precursor, redispersing the aluminum oxide precursor in P123 and assembling to obtain a porous aluminum oxide precursor; dispersing the porous aluminum oxide precursor and a second aluminum source in deionized water, and adding a solution of a palladium-containing compound and an additive-containing compound to prepare a catalyst precursor slurry; adding gelatin and gum arabic to the catalyst precursor slurry and uniformly mixing same to prepare a composite colloidal solution, adding the colloidal solution dropwise to a liquid column consisting of an upper-layer oil phase and a lower-layer curing agent, and then carrying out aging, drying, calcining, and reduction to obtain the spherical catalyst. The present invention is doped with the porous aluminum oxide precursor, thereby improving the pore structure of the catalyst, increasing the utilization rate of the interior of spherical aluminum oxide, and reducing the mass transfer resistance of the reaction.

The invention discloses preparation of a graphite-phase carbon nitride-based composite photocatalyst and application of the graphite-phase carbon nitride-based composite photocatalyst in hydrogen peroxide synthesis, and belongs to the technical field of photocatalyst preparation. The efficiency of the composite photocatalyst for synthesizing hydrogen peroxide in an alkaline environment is different from that of catalysts in most of other reports, the optimal catalyst prepared by the invention shows good adaptability in a wider pH (potential of hydrogen) range (3-10), and hydrogen peroxide synthesized by photocatalysis in the alkaline environment is superior to hydrogen peroxide synthesized by photocatalysis in an acidic environment; the prepared optimal catalyst can be used for efficiently photosynthesizing hydrogen peroxide under an alkaline condition, and the result shows that when the pH is 10, the yields of hydrogen peroxide are 1.43 times and 1.35 times of the yields of hydrogen peroxide with the pH being 3 and 5 respectively.

This invention proposes a photocatalytic material based on Bi2O2S, its preparation method, and its application. The Bi2O2S-based photocatalytic material comprises Bi2O2S, oxygen vacancies introduced onto the Bi2O2S, and an S-type heterojunction constructed on the Bi2O2S. The Bi2O2S-based photocatalytic material is O... V -Bi2O2S / Bi4O5I2 composite photocatalytic material; the O V The preparation method of the -Bi2O2S / Bi4O5I2 composite photocatalyst material includes: Step 1) preparing O V -Bi2O2S catalyst; Step 2) Preparation of O V -Bi2O2S / Bi4O5I2 composite photocatalytic material; the O V The Bi2O2S / Bi4O5I2 composite photocatalytic material is suitable for hydrogen peroxide synthesis; this invention is a novel composite photocatalytic material with a novel structure and excellent performance.

The invention discloses a hydrogen peroxide synthesis device and a hydrogen peroxide preparation method, the device comprises: an anode tank, two sides of which are respectively provided with an electrolyte inlet and an electrolyte outlet; an electrolyte inlet and a product outlet are respectively formed in two sides of the cathode tank; a gas inlet and a gas outlet are respectively formed in two sides of the gas chamber; an anode electrode is arranged between the anode tank and the cathode tank, an anion exchange membrane is arranged between the anode electrode and the cathode tank, and a cathode electrode is arranged between the cathode tank and the gas chamber. The device is a three-chamber flow type electrolytic cell, a three-phase interface formed by the device is uniform and stable, and gas and liquid can be in uniform contact with a catalyst, so that catalytic sites on the surface of the catalyst are fully utilized. Excessive oxygen penetrates through the carbon paper to cause extra pressure on a catalytic interface, so that newly generated hydrogen peroxide is quickly extruded into electrolyte from active sites, the local high-concentration effect of hydrogen peroxide is reduced, the preparation efficiency of hydrogen peroxide is improved, and meanwhile, catalytic sites are protected.

The invention relates to the technical field of catalyst preparation, in particular to a homojunction photocatalyst as well as a preparation method and application thereof.The cyano and nitrogen defect co-modified C3N4 / C3N5 homojunction photocatalyst is constructed through simple mixing, grinding and thermal polymerization, and the C3N4 / C3N5 homojunction photocatalyst shows excellent catalytic performance in the aspect of photocatalytic production of H2O2 and has a good application prospect. The industrialization requirement of photocatalytic synthesis of H2O2 is expected to be met. The C3N4 / C3N5 homojunction photocatalyst containing the nitrogen defect and the cyano group provided by the invention has the advantages of simple preparation method, low raw material price, high stability and high hydrogen peroxide synthesis efficiency.

The invention relates to the field of photocatalytic materials, in particular to a photocatalytic material for hydrogen peroxide synthesis and a preparation method and application thereof. The preparation method of the photocatalytic material provided by the invention comprises the following steps: (1) grinding and mixing melamine, potassium chloride (KCl) and hexagonal phase boron nitride (h-BN) to obtain a uniform mixture; and (2) heating the uniform mixture to 500-650 DEG C, carrying out heat preservation treatment, cooling, grinding, washing, and drying to obtain the product. According to the preparation method, a molten salt effect of KCl and a dual-modification strategy of constructing a Type II heterojunction with h-BN are adopted, g-C3N4 is effectively modified, the potassium-doped g-C3N4 / h-BN composite photocatalytic material rich in nitrogen defects is prepared, the material has excellent activity of photocatalytic synthesis of H2O2 and good cycle stability, and the preparation method is suitable for industrial production. A new effective way can be provided for green and sustainable synthesis of hydrogen peroxide.

The invention discloses a preparation method of an oxyacid radical modified graphite-based cathode for electro-catalysis hydrogen peroxide synthesis. An oxyacid (sulfuric acid or phosphoric acid) and nitric acid are compounded to form a mixed acid solution, and the graphite-based electrode is subjected to oxyacid radical modification by using the mixed acid solution. The preparation method of the oxygen-containing acid modified graphite-based electrode is simple and low in cost, does not need harsh conditions such as high temperature and the like, and has great industrial and large-scale production potential; the oxygen-containing acid radical modified graphite-based cathode prepared by an acid treatment method is used for reducing oxygen to produce hydrogen peroxide, the yield of the hydrogen peroxide exceeds 21.79 mg.cm <-2 >. H <-1 > and is increased by about 20 times compared with the yield (1.13 mg.cm <-2 >. H <-1 >) of oxygen oxidation by using unmodified original commercial carbon paper, and meanwhile, the highest selectivity of the hydrogen peroxide is up to 97.5%.

The invention relates to preparation of a quinoline covalent organic framework material and photosynthesis of hydrogen peroxide. The invention provides a quinoline covalent organic framework material for photocatalytic synthesis of hydrogen peroxide, and solves the problems of low yield and low visible light utilization rate of photocatalytic synthesis of hydrogen peroxide. The method comprises the following steps: dispersing two reaction monomers into an organic solvent to form a mixed solution, carrying out ultrasonic treatment on the mixed system for a period of time, adding the organic solvent and acid, and continuously stirring; after heating reaction for a period of time, cooling to room temperature, carrying out solid separation, collecting the solid, washing, drying and grinding to finally obtain the quinoline covalent organic framework. The preparation process is simple and effective, the reagent consumption is low, and the yield is high; the photocatalyst provided by the invention can effectively improve the efficiency of photosynthesis of hydrogen peroxide. The material is applied to the field of photocatalytic synthesis of hydrogen peroxide, experiments show that the material has excellent performance of photocatalytic synthesis of hydrogen peroxide, and the hydrogen peroxide synthesis rate can reach 4120 [mu] mol.g <-1 >. H <-1 > under visible light irradiation.

Described is a catalyst obtained by supporting magnesium and cerium on activated alumina, firing same to immobilize the metals, and then impregnating same with palladium and performing reduction thereon, and is applied, when hydrogen peroxide is prepared by means of an anthraquinone process, to operation solution regeneration or hydrogenation, and thus an efficient regeneration conversion rate or synthesis yield is achieved.

The invention relates to the technical field of hydrogen peroxide synthesis, and discloses a hydrogen peroxide electrochemical synthesis device which comprises a movable modular box body, a fluid treatment module, a reaction module, a detection module, a safety module and a temperature control module, the fluid treatment module is arranged in the movable modular box body and comprises an alkali liquor box, a cathode process circulating pump, an anode process circulating pump, an anode alkali supplementing pump, a pure water inlet and a product collecting box; the reaction module is arranged in the middle of the movable modular box body and comprises a plate frame type electrolytic cell, a cathode gas-liquid separator and an anode gas-liquid separator, an outlet of a cathode of the plate frame type electrolytic cell is communicated with an inlet in the top of the cathode gas-liquid separator, and an outlet of an anode of the plate frame type electrolytic cell is communicated with an inlet in the top of the anode gas-liquid separator; the mode that a traditional intermittent electrolytic cell frequently stops to change liquid is abandoned, and continuous production is achieved through the cathode process circulating pump, the anode process circulating pump, the gas-liquid separator and closed-loop control.

The application discloses a carvacol-loaded covalent organic framework composite photocatalyst and a preparation method and application thereof, and belongs to the technical field of photocatalysis. The catalyst is prepared by introducing carvacol into a covalent organic framework through an impregnation method. Under visible light irradiation, the composite catalyst has a hydrogen peroxide synthesis yield of up to 7681 μmol·g ‑1 ·h ‑1 in pure water, and can directly utilize in-situ generated hydrogen peroxide to achieve efficient inactivation of escherichia coli in water bodies without adding any exogenous iron ions, and can completely kill in 75 min. The carvacol is first compounded with the covalent organic framework as an electron transfer medium in the application, which significantly improves the photogenerated carrier separation efficiency and photocatalytic performance, and has the advantages of high efficiency, greenness and simple process, and provides a novel integrated solution for photocatalytic preparation of hydrogen peroxide and water body disinfection.

The present invention provides a method for regenerating a working solution used in the production of hydrogen peroxide by the anthraquinone process, belonging to the technical field of hydrogen peroxide synthesis. The regeneration method is as follows: the working solution is introduced into a regeneration bed and contacted with an internal regenerant for a period of time for regeneration, and then the working solution is output to obtain the regenerated working solution. The preparation method of the regenerant includes preparing modified alumina, compounding, and surface modification. The method of surface modification is as follows: the CaOMnO2 / modified alumina composite is added to deionized water, stirred for 5-7 h, then tetraethyl orthosilicate is added, ultrasonically dispersed, and reacted for 20-30 h. Then, centrifugation is carried out. After the precipitate is washed clean, it is added to an ethylenediaminetetraacetic acid solution, and then 3-aminopropyltriethoxysilane is added, and stirred and reacted for 3-4 h. After filtration and drying, the regenerant is obtained. The regenerant of the present invention has good regeneration effect, the regeneration increment is 16.12-21.45 g / L, and the service life reaches 99-108 days.

This invention discloses a method for the photocatalytic degradation of bisphenol A and the synergistic generation of H2O2 based on O-ZnIn2S4, comprising: adding the O-ZnIn2S4 photocatalytic material to wastewater containing bisphenol A, and performing photocatalytic degradation of bisphenol A and in-situ generation of H2O2 under visible light irradiation. Under light conditions, the O-ZnIn2S4 photocatalytic material of this invention exhibits excellent activity in the organic matter degradation reaction, while its H2O2 generation rate is high. The system of this invention achieves synergistic coupling of organic pollutant removal and in-situ hydrogen peroxide generation, providing a new photocatalytic strategy for green and efficient hydrogen peroxide synthesis and environmental remediation.

The invention discloses a preparation method and application of a chiral engineering fluorinated covalent organic framework material. By preparing the chiral engineering fluorinated covalent organic framework material, the electron spinning direction is directionally regulated and controlled, the decomposition path of hydrogen peroxide is inhibited, and the photocatalytic performance is improved. The preparation method comprises the following steps: dissolving (R)-(+)-1-phenylethylamine or (S)-(-)-alpha-methylbenzylamine and 1, 3, 5-triformyl phloroglucinol in an organic solvent for reflux reaction to obtain an intermediate; and dissolving 1, 3, 5-triformyl phloroglucinol, the intermediate TP-R or TP-S and amino tetrafluorophenyl (F) in a mixed solvent, carrying out ultrasonic treatment, and reacting to obtain the photocatalytic material. The method is low in cost, easy and convenient to operate, green and free of pollution, the obtained material is good in stability and high in photocatalytic activity in a complex water environment, the defects in the prior art are overcome, and development and application of a photocatalytic hydrogen peroxide synthesis technology are promoted.

The application discloses a flow field structure device suitable for electrochemical synthesis of high-purity hydrogen peroxide, which adopts an integrated configuration as a whole, and is integrated with a fluid input port, a fluid output port, a multi-channel parallel flow distribution flow path, a cathode medium through port, an anode medium through port and a circumferential positioning assembly structure. The positive and negative end faces of each medium through port are provided with sealing configurations, so that a closed integrated fluid transmission distribution system is formed. The application discloses abandoning the traditional series bending flow path design and adopting a parallel equal distribution flow path topology structure, so that the fluid realizes global pressure equal distribution in the interior and is symmetrically and slowly released to both sides, the problem of uneven flow field pressure is effectively improved, the core functional components of the reactor are protected, the risk of leakage and sealing failure caused by local high pressure is avoided from the structural level, meanwhile, the parallel flow path layout scale and the flow field action area size can be flexibly adjusted according to actual working conditions, different reaction areas and production capacity demands can be adapted, a specification-adjustable electrochemical reactor system can be constructed, the application meets the hydrogen peroxide synthesis application in multiple scenes, the overall structure is compact and regular, and the disassembly, maintenance and reassembly are simple, the equipment operation and maintenance costs can be significantly reduced, and the device has excellent operation stability, sealing reliability and engineering industrial application prospect.

The invention relates to a 1, 1, 3, 3-tetramethylbutyl hydroperoxide synthesis system and a 1, 1, 3, 3-tetramethylbutyl hydroperoxide synthesis process, belongs to the technical field of fine chemical engineering and dangerous chemical synthesis, and provides a 1, 1, 3, 3-tetramethylbutyl hydroperoxide synthesis system and a 1, 1, 3, 3-tetramethylbutyl hydroperoxide synthesis process for solving the problem of low reaction rate caused by immiscibility of substrates and reduction of effective collision of molecules in the synthesis process of 1, 1, 3, 3-tetramethylbutyl hydroperoxide. The system comprises a feeding unit, a micro-reaction unit, a product collection and post-treatment unit and a safety control unit which are communicated with one another, reaction heat can be instantaneously removed by virtue of mutual cooperation of the units and the extremely high heat transfer efficiency of a micro-channel reactor, heat accumulation and local overheating are avoided, and the reaction efficiency is improved. And the risk that the reaction is out of control is fundamentally eliminated. And the safety control unit realizes real-time monitoring and automatic emergency treatment of temperature and pressure, and provides double insurance for high-risk reaction.

The invention belongs to the technical field of energy materials, and relates to a preparation method of a material for electrocatalytic synthesis of hydrogen peroxide by efficiently recycling a waste battery silicon-based negative electrode material. Aiming at the problems of low recovery efficiency and large environmental burden of the existing waste battery, the method comprises the following steps: performing surface modification on a recovered silicon-based material through high-temperature oxidation, introducing a cationic surfactant (CTAB) to construct an ordered carbon structure, doping tin (Sn) metal, and calcining to remove impurities, thereby obtaining the high-performance electrocatalyst. The catalyst shows excellent selectivity and activity in a two-electron oxygen reduction reaction (2eORR), the hydrogen peroxide synthesis efficiency is remarkably improved, and the energy consumption is reduced. According to the method, high-value resource utilization of the waste battery silicon material is realized, an environment-friendly, economical and feasible technical path is provided for green preparation of hydrogen peroxide, and the method has an important application prospect.

The invention discloses an electrogenerated hydrogen peroxide micro-water-flushing sanitary device driven by photovoltaic power generation. A photovoltaic power generation system with devices such as a thin-film solar cell panel is used for driving hydrogen peroxide electrosynthesis. In an electrochemical system, a titanium electrode is used as an anode, and a carbon black / graphite air breathing cathode is used as a cathode to construct the hydrogen peroxide synthesis device. And the synthesized hydrogen peroxide disinfectant or water is pumped out by the intermittent water distribution device through a water suction pump and is used for disinfecting a toilet and flushing defecation objects. The surface of the squatting pan is provided with the organic silicon coating and the lubricant, so that the squatting pan has a lubricating function, and the cleaning effect can be achieved through micro water flushing. Generally speaking, the toilet provided by the invention is used for generating power by utilizing a solar cell panel and driving an electrochemical synthesis system to produce hydrogen peroxide in areas lack of resources such as rural areas, and a small amount of water or hydrogen peroxide passes through a squatting pan with an organic silicon coating surface and is successfully disinfected and flushed; therefore, the toilet has the effects of wide application scene, real-time disinfection and deodorization and low water consumption.

The present invention discloses a preparation method and application of a chiral engineered fluorinated covalent organic framework material. The present invention prepares a chiral engineered fluorinated covalent organic framework material, directionally controls the direction of electron spin, suppresses the decomposition path of hydrogen peroxide, and improves photocatalytic performance. The preparation method includes dissolving (R)-(+)-1-phenylethylamine or (S)-(-)-α-methylbenzylamine and 1,3,5-triformylphloroglucinol in an organic solvent and refluxing to obtain an intermediate; then dissolving 1,3,5-triformylphloroglucinol and the intermediate TP-R or TP-S with 1,3,5-tris-(2,3,5,6-tetrafluoro-4-aminophenyl)-benzene (F) in a mixed solvent and reacting after ultrasonic treatment to obtain a photocatalytic material. The method of the present invention is low in cost, simple to operate, green and pollution-free. The obtained material has good stability in complex water environments and high photocatalytic activity, which solves the defects in the prior art and promotes the development and application of photocatalytic hydrogen peroxide synthesis technology.

The invention discloses an acid self-supply electro-Fenton water treatment system based on a proton exchange membrane, and belongs to the technical field of advanced oxidation water treatment. The system is composed of an electrochemical unit and a Fenton degradation unit, synthesis of hydrogen peroxide (H2O2) and self-acidification of the system are completed synchronously, and a generated acidic H2O2 solution can be directly subjected to Fenton reaction with ferrous ions without adding acid to adjust pH, so that organic pollutants are efficiently degraded; protons in the electrochemical unit are continuously supplied by an anode hydrogen oxidation (HOR) reaction, are directionally migrated to a cathode through a proton exchange membrane, and generate an acidic hydrogen peroxide solution in situ with oxygen in air under the action of a high-efficiency catalyst; under the high current density of 500 mA. Cm <-2 >, the degradation rate and the total organic carbon (TOC) removal rate of various simulated organic pollutants in a Fenton unit can exceed 90%. The method integrates endogenous supply of protons, efficient reduction of oxygen in air and self-construction of an acidic reaction environment, overcomes the dependence of a traditional Fenton technology on external acid addition and high-concentration H2O2, has the advantages of flow simplification, low operation cost, environmental friendliness and the like, and is suitable for distributed and modularized water treatment scenes.

Disclosed is a method for preparing a polyimide material for photocatalytic hydrogen peroxide synthesis, belonging to the fields of environmental chemistry, chemical engineering and materials science. The present invention prepares a polyimide catalytic material by means of thermal imidization of an aromatic triamine monomer and an aromatic dianhydride monomer, the aromatic triamine monomer being selected from TABPB, TAB and TBZ, and the aromatic dianhydride monomer being BDA. The present invention uses widely available raw materials and a simple synthesis method to obtain a polyimide material having excellent photocatalytic activity. This polyimide material, as a catalyst, is dispersed in an oxygen-containing aqueous solution for photocatalytic hydrogen peroxide production, and after irradiation with light for a period of time, hydrogen peroxide is obtained. The present method has the advantages of being green and environmentally friendly, safe and pollution-free, using water and oxygen as raw materials, using solar energy as an energy source, and having simple synthesis, mild reaction conditions, a stable and easily recyclable catalyst, and high hydrogen peroxide yield.

The present invention relates to a regeneration catalyst for a working solution used in the synthesis of hydrogen peroxide, a method for manufacturing the regeneration catalyst, and a method for regenerating the working solution. In particular, the present invention relates to a palladium catalyst using a spinel support as a catalyst used in the regeneration process of a working solution for hydrogen peroxide production, a method for manufacturing the catalyst, and a regeneration technique for the working solution using the catalyst. The catalyst of the present invention exhibits high efficiency and high physical / chemical durability in the regeneration reaction and the hydrogenation reaction.

The invention discloses an electrochemical hydrogen peroxide synthesis system capable of being used and produced at any time in an air atmosphere, which belongs to the technical field of electrochemical synthesis and comprises a cathode shell, a cathode, an anion exchange membrane, a solid electrolyte layer, a cation exchange membrane, a counter electrode and an anode shell which are sequentially overlapped, the cathode shell is provided with an air inlet and an air outlet; a membrane electrode solid electrolyte is placed in the solid electrolyte layer, and a pure water inlet and an H2O2 solution outlet are formed in the solid electrolyte layer; the anode shell is provided with an anolyte inlet and an anolyte outlet; the cathode is composed of a cathode catalyst, and specifically, the cathode catalyst is a functionalized XC-72 carbon black catalyst loaded with 8-12% of surface oxygen coverage rate; the anode is composed of an anode catalyst. The catalytic electrolysis technology is utilized, only water and electricity basic supply needs to be connected, oxygen in water and air can be converted into a pure hydrogen peroxide solution, and the bottleneck that in the prior art, dependence on high-purity oxygen is high, and the synthesis efficiency is low under the low-oxygen condition is broken through.

The invention relates to a monatomic tellurium catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, dissolving a tellurium source and a natural polymer precursor in hot water, carrying out hydrothermal reaction on the obtained mixture, and cooling and freeze-drying to obtain a head product; then, putting the initial product into a tubular furnace, pyrolyzing in an atmosphere, and naturally cooling to room temperature; and finally, washing with deionized water and ethanol for three times, and drying in a drying oven to obtain the monatomic tellurium catalyst. The monatomic tellurium catalyst has excellent performance and cycle stability frequency in zinc air batteries and synthesized hydrogen peroxide. Compared with the prior art, the raw materials are cheap and easy to obtain, the preparation process is simple, the cost is low, and the problem that a metal free monatomic catalyst is easy to aggregate and unstable can be solved. And the cost of large-scale energy storage can be reduced, the carbon cycle industry chain is perfected, and the application prospect is good.

The invention belongs to the technical field of hydrogen peroxide preparation, and discloses a method for synthesizing hydrogen peroxide under mild conditions. According to the method, oxygen and water are taken as raw materials, a defect-rich IV-VI family binary semiconductor material is taken as a catalyst, and high-efficiency, safe and low-cost hydrogen peroxide synthesis can be realized by thermocatalysis under mild conditions without additional energy input (such as light and an electric field) and a sacrificial agent. The technology is simple to operate, low in energy consumption and environment-friendly, fills the technical blank of synthesizing hydrogen peroxide by using water and oxygen under mild conditions, and has important industrial application prospects.

The application belongs to the technical field of catalysts, and particularly relates to a carbon-loaded MoO x The application relates to preparation of a cluster catalyst and application of the cluster catalyst to electro-synthesis of hydrogen peroxide. The catalyst comprises an oxygen-doped carbon carrier and a MoO x cluster active component; the oxygen-doped carbon carrier is a two-dimensional nanosheet structure, and the MoO x cluster is a sub-nanometer cluster with a size of <2 nm. The application successfully prepares a sub-nanometer molybdenum oxide cluster composite material loaded on an oxygen-doped carbon carrier by combining pre-adsorption and low-temperature pyrolysis. The composite material utilizes the excellent conductivity and stable structure of the functionalized carbon carrier to provide stable anchoring sites for the sub-nanometer molybdenum oxide cluster with high surface energy, and through construction of a strong interface coupling, the catalytic activity, selectivity and long-term stability of the catalyst in the electro-synthesis of hydrogen peroxide are synergistically enhanced, thereby providing a new material design idea for development of a high-efficiency, stable and low-cost non-noble metal hydrogen peroxide synthesis catalyst.

The invention belongs to the technical field of quantitative analysis, and provides a quantitative analysis method of tert-butyl hydroperoxide synthesis reaction feed liquid. The quantitative analysis method comprises the following steps: placing an internal standard substance 2-hexanol in a volumetric flask, and fixing the volume with methanol to obtain an internal standard substance solution; and mixing the tert-butyl hydroperoxide synthesis reaction feed liquid with the internal standard substance solution, carrying out gas chromatography detection, and calculating the contents of tert-butyl hydroperoxide, tert-butyl alcohol and di-tert-butyl hydroperoxide in the tert-butyl hydroperoxide synthesis reaction feed liquid according to the peak area and the relative correction factor standard curve. The 2-hexanol is used as an internal standard substance, the tert-butyl hydroperoxide synthesis reaction feed liquid is subjected to gas chromatography internal standard method quantitative analysis, the content of a main product tert-butyl hydroperoxide, the content of a byproduct di-tert-butyl hydroperoxide and the content of a raw material tert-butyl alcohol in the feed liquid can be obtained under the same detection condition, the method is safe and efficient, the steps are simple and rapid, and the method is suitable for industrial production. The detection result is high in accuracy and good in repeatability.

The invention belongs to the technical field of catalyst preparation and hydrogen peroxide synthesis, relates to a preparation method and application of a bimetallic hydroxyl compound catalyst, and particularly provides a preparation method of a bimetallic hydroxyl compound catalyst and a preparation method of a rare earth doped bimetallic hydroxyl compound catalyst. According to the preparation method, stannate, zinc salt and rare earth salt are taken as reactants, and the bimetallic hydroxyl compound catalyst is obtained through a co-precipitation reaction; wherein the molar ratio of the tin element in the stannate to the zinc element in the zinc salt to the rare earth element in the rare earth salt is 1: (0.8-1): (0-0.2). According to the method, the ZnSn (OH) 6 catalyst or the rare earth doped ZnSn (OH) 6 catalyst is prepared by taking the water-soluble zinc salt and stannate as raw materials through one-step coprecipitation under the condition of not adding or adding rare earth salt and not adding any additive, the preparation method is simple, high-pressure closed containers such as a hydrothermal kettle and other morphology control agents do not need to be used, and the method is suitable for industrial production. And the performance of the ZnSn (OH) 6 catalyst for piezoelectric catalytic synthesis of hydrogen peroxide is improved through rare earth doping.

The invention belongs to the technical field of photocatalysis, and particularly discloses a modified carbon nitride-based composite photocatalyst as well as a preparation method and application thereof. According to the composite photocatalyst, graphite-phase carbon nitride (g-C3N4) is taken as a matrix, and a cyano-functionalized potassium ion-doped electronic structure system is constructed through a synergistic modification strategy of combination of ammonia gas pretreatment and potassium bromide post-treatment. The preparation method is simple in process, mild in condition and low in cost. The composite photocatalyst is driven by visible light, the generation rate of hydrogen peroxide prepared through photocatalysis by taking water and oxygen as raw materials reaches up to 3.824 mmol.g <-1 >. H <-1 >, is 48 times of that of unmodified carbon nitride (g-C3N4), and is 2.1 times of that of only KBr doped carbon nitride (g-C3N4-KBr), and the composite photocatalyst has high selectivity and good cycle stability, and can be used for preparing hydrogen peroxide. The problems that an existing hydrogen peroxide synthesis technology is large in pollution and insufficient in catalyst activity are solved, and the method has wide industrial application prospects in the fields of clean energy synthesis and green chemical engineering.

The application provides a beta-ketoenamine type covalent organic framework material COF-N32 with a triazine structure and a preparation method and application thereof in photosynthesis of hydrogen peroxide. The preparation method comprises the following steps: adding 2,4,6-trihydroxybenzene-1,3,5-trimethyl formaldehyde and 2,4,6-tris(4-aminophenyl)-1,3,5-triazine into a solvent system comprising 1,4-dioxane, mesitylene and a 3 mol / L acetic acid solution, performing ultrasonic oscillation, heating and reacting, and washing and drying to obtain the covalent organic framework material COF-N32. The beta-ketoenamine type covalent organic framework material COF-N32 with a triazine structure is synthesized through a solvothermal reaction, is used as a photocatalyst for synthesis of hydrogen peroxide, does not need to be modified through a heterojunction, protonation and the like subsequently, is simple and convenient to operate, is simple, efficient, safe, stable, and has no risk of release of metal ions in the photocatalytic synthesis of hydrogen peroxide, and the prepared material can be effectively regenerated and reused after use.