78results about "Hydrogen peroxide" patented technology

The utility model discloses a gasified hydrogen peroxide supply device which comprises an evaporator, a hydrogen peroxide supply pipeline, a sterile air supply pipeline for atomization and a sterile hot air supply pipeline for gasification. The hydrogen peroxide supply pipeline and the sterile air supply pipeline for atomization are connected with the mist input end of the evaporator, the sterile hot air supply pipeline for gasification is connected with the hot air input end of the evaporator, and the gasified hydrogen peroxide supply device further comprises a descaling pipeline. The hydrogen peroxide evaporation path is covered with the descaling agent conveying path, it is guaranteed that the descaling agent makes contact with all dirt, the dirt is removed along the original gasified hydrogen peroxide generation path, the heat conduction efficiency of the evaporator is maintained, and the gasification quality of the whole gasified hydrogen peroxide supply device is guaranteed.

Improved methods for reducing and preventing nosocomial infections is provide comprising installing one or more dry hydrogen peroxide (DHP) generating devices into a healthcare treatment area, producing DHP, and maintaining the concentration between 1.0 parts-per-billion (ppb) and 200 ppb.

The invention provides a ketone-enol tautomeric structure catalyst as well as a preparation method and application thereof in photosynthesis of hydrogen peroxide, and belongs to the technical field of catalysts. The preparation method comprises the following steps: mixing a first organic linker, a second organic linker, an acid catalyst and an organic solvent, and carrying out solvothermal reaction to obtain the ketone-enol tautomeric structure catalyst. According to the beta-keto-enamine COFs and the preparation method thereof, keto-enol tautomerism can be effectively adjusted through integration of different amounts of-OH groups in the beta-keto-enamine COFs, so that the visible light absorption capacity and the charge generation efficiency of the COFs are improved. When the keto-enol tautomeric structure catalyst provided by the invention is used for photosynthesis of hydrogen peroxide, water and oxygen can be effectively activated, so that the keto-enol tautomeric structure catalyst shows excellent hydrogen peroxide photosynthesis activity. The result of the embodiment shows that the H2O2 production rate of the ketone-enol tautomeric structure catalyst provided by the invention can reach 3474 mu mol / gcat <-1 > h <-1 >.

This invention relates to the field of hydrogen peroxide gel technology, specifically to a hydrogen peroxide gel containing amphiphilic Bola molecules and its preparation method. The gel comprises, by mass percentage: 93-99.4 wt% of a hydrogen peroxide aqueous solution (30-98%); 0.5-5 wt% of a gelling agent; and 0.1-2 wt% of a stabilizer. The gelling agent is an amphiphilic Bola molecule, HDGA, synthesized with glutamic acid as the hydrophilic head group and a long alkyl chain as the hydrophobic chain. The preparation method involves heating and cooling HDGA in a hydrogen peroxide solution system to obtain a hydrogen peroxide hydrogel with a three-dimensional network structure. The preparation method provided by this invention is simple, and the prepared hydrogen peroxide hydrogel exhibits stable low-temperature performance, is easy to store and transport, and shows enhanced flowability after shearing, making it convenient for use.

Decomposition apparatus for hydrogen peroxide, comprising at least one reaction chamber which, when used as intended, contains an immobilized catalyst, characterized in that the catalyst used can be separated from the reaction mixture by decantation.

The application provides high-crystalline carbon nitride, a preparation method thereof and application thereof in photocatalytic production of hydrogen peroxide. The preparation method of the high-crystalline carbon nitride comprises the following steps: S1: calcining melamine under a nitrogen atmosphere, and cooling, washing and drying after calcination to obtain bulk-phase carbon nitride; and S2: uniformly mixing potassium chloride, lithium chloride and the bulk-phase carbon nitride, and then calcining under a nitrogen atmosphere, and cooling, washing and drying after calcination to obtain high-crystalline carbon nitride. The high-crystalline carbon nitride has high crystallinity, a large surface area and more active sites, and has excellent photocatalytic performance, which is conducive to efficient photocatalytic production of hydrogen peroxide.

The invention belongs to the field of green chemical industry, and discloses a preparation method of a J-type porphyrin supramolecule (TCPP-LSA-J) with ultra-long near-infrared absorption performance and application of the J-type porphyrin supramolecule in preparation of hydrogen peroxide through photo-thermal catalysis under the condition of no sacrificial agent. The method comprises the following steps: mixing the prepared TCPP-LSA-J with ultrapure water (50.0-100.0 mL), irradiating by a xenon lamp (lambda is greater than or equal to 420 nm) under the conditions of 20-100 DEG C, O2 flow of 25.0-50.0 mL / min and continuous stirring, reacting, filtering and concentrating to obtain a high-concentration hydrogen peroxide aqueous solution. Under the LDH confinement effect, the TCPP molecular layers are arranged in an inclined and staggered mode to form J-type supramolecules, the absorption wavelength is expanded to the second near-infrared region (1750 nm), and efficient utilization of solar energy is achieved. The system does not need an organic sacrificial agent, is green and environment-friendly, takes O2 as an oxygen source, and is safe, low in energy consumption, mild in reaction condition, simple and convenient to operate and high in yield.

The invention discloses a photo-induced self-sacrifice stripping photocatalyst and a preparation method and application thereof, and belongs to the technical field of catalysts.The preparation method of the photocatalyst comprises the following steps that 2, 4, 6-trimethylpyridine and alkyl halide are placed in a first solvent for a reaction, and a monomer ETMP-X is obtained; x is any one of Cl, Br and I; and in an inert atmosphere, putting the monomer ETMP-X, TAPB and a base catalyst into a second solvent, and heating to 100-150 DEG C for reaction to obtain the photocatalyst. The prepared photocatalyst is an ionic covalent organic framework material and has high crystallinity and long-range orderliness, the particle size and thickness of the material can be remarkably reduced by conducting photoinduced self-sacrifice stripping on the photocatalyst, and the stripping process of the material is successfully achieved; in addition, the stripped material is applied to the field of photocatalytic hydrogen peroxide production and is coupled with aerobic oxidation of the benzyl alcohol compound, so that ultrahigh hydrogen peroxide generation rate and higher conversion selectivity of the benzyl alcohol compound are realized.

The invention relates to the field of hydrogen peroxide production, in particular to a hydrogen peroxide decomposition inhibition device for hydrogen peroxide production, which comprises a tank body, the device further comprises a feeding pipe; a cooling cavity is formed in the tank body; the tank body is communicated with a feeding pipe, and the feeding pipe is provided with a feeding valve; the tank body is communicated with a discharge pipe, and the discharge pipe is provided with a discharge valve; the tank body is fixedly connected with a plurality of spring rods I; the telescopic ends of all the spring rods I are jointly and fixedly connected with a cover plate, and the cover plate makes contact with the tank body. The cover plate is fixedly connected with a circular plate, and the circular plate is slidably connected with the interior of the tank body. When the water bag sprays water to dilute the hydrogen peroxide in the leakage area, the electromagnetic valve is controlled to be opened, so that cooling water in the cooling cavity enters the water bag, water in the water bag is cooled, then the hydrogen peroxide in the leakage area is cooled by the cooling water sprayed out of the water bag, and the decomposition rate of the leaked hydrogen peroxide is effectively restrained.

To provide a discharge device capable of discharging highly concentrated ejection product material.SOLUTION: A discharge device 1 ejects ejection product material into the air. The discharge device 1 comprises: a housing 11; a discharge electrode 131; and two protection portions 141 and 141. The discharge electrode 131 projects from the housing 11. The discharge electrode 131 ejects the ejection product material into the air by performing a discharge. Each protection portion 141 is one portion and the housing 11 is another portion. The two protection portions 141 and 141 are provided with the discharge electrode 131 interposed between the two protection portions. Each protection portion 141 includes: a pair of supporting portions 161 and 161; and an electrode protection portion 151. The pair of supporting portions 161 and 161 is provided in the housing. Each supporting portion 161 extends toward a direction separated from the housing 11. A terminal end portion of each supporting portion 161 is arranged at a position more separated from the housing 11 than a distal end portion 13A of the discharge electrode 131. The electrode protection portion 151 connects the terminal end side of one support portion 161 to the other support portion 161.SELECTED DRAWING: Figure 4

The invention relates to a composition comprising: an aqueous solution of hydrogen peroxide; one or more organic carbonates selected from dialkyl carbonates and alkylene carbonates or one or more lactones; and one or more organic acids selected from monocarboxylic acids comprising at least 10 carbon atoms and polycarboxylic acids. The invention also relates to the use of this composition for recycling a material comprising a polyepoxy matrix, as well as to a recycling process for such a material using this composition.

The reaction kettle for hydrogen peroxide production comprises a reaction kettle shell, supporting columns are installed on the left side and the right side of the bottom of the reaction kettle shell, shockproof bases are fixedly installed at the bottoms of the supporting columns, a feeding port is formed in the left side of the upper surface of the reaction kettle shell, and an exhaust hole is formed in the right side of the upper surface of the reaction kettle shell. A discharge port is formed in the bottom of the reaction kettle shell, a control valve is arranged on the right side of the discharge port, a partition plate is horizontally arranged on the upper portion of the interior of the reaction kettle shell, a material control disc is arranged above the partition plate, a large gear is fixedly installed on the bottom face of the partition plate, tripods are arranged at the bottom of the large gear, and rotating rods are arranged below the tripods. According to the reaction kettle for hydrogen peroxide production, the material feeding amount is controlled through the material control disc, potential safety hazards caused by material proportioning are prevented, meanwhile, the stirring structure can revolve and rotate at the same time, the stirring range is widened, and hydrogen peroxide production is fully reacted.

The present application relates to a kind of preparation of ion liquid modified carbon nitride composite and photosynthesis hydrogen peroxide.The present application provides a new type of ion liquid doped carbon nitride photocatalytic synthesis hydrogen peroxide, to solve the existing carbon nitride material photocatalytic synthesis hydrogen peroxide production low and the problem of not high visible light utilization rate.Method: one, the preparation of carbon nitride raw material;Two, the preparation of ion liquid doped carbon nitride sample.The preparation process of the present application is simple and effective, reagent consumption is less and the yield is high;And the photocatalyst provided by the present application can effectively improve the photosynthesis hydrogen peroxide efficiency.The present application is applied to the field of photocatalytic synthesis hydrogen peroxide, and experiment shows that the material has excellent photocatalytic synthesis hydrogen peroxide performance, and the synthesis hydrogen peroxide rate can reach 657 μmol·g ‑1 ·h ‑1 under visible light irradiation.

The invention discloses a transition metal oxyhydroxide modified BiOCl photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of photocatalytic materials. According to the photocatalyst, a BiOCl nano-plate serves as a carrier, transition metal oxyhydroxide MOOH is loaded on the surface of the BiOCl nano-plate, M is at least one of Co, Fe, Mn and Ni, and the mass ratio of MOOH to BiOCl ranges from 1: 20 to 1: 5. The preparation method comprises the following steps: synthesizing a BiOCl nano-plate through a hydrothermal method, dispersing the BiOCl nano-plate in a solution containing sulfate radicals and transition metal ions, and growing MOOH on the surface of BiOCl in situ through a photo-induced deposition method under an alkaline condition. Through surface modification of MOOH, separation and migration of BiOCl photon-generated carriers are effectively promoted, attack of photo-generated holes to Cl in BiOCl crystal lattices is inhibited, photo-corrosion of BiOCl is remarkably reduced, and the structural stability and photocatalytic activity of BiOCl are improved. The catalyst shows excellent performance in the aspects of degradation of organic pollutants (such as glyphosate wastewater) and photocatalytic generation of H2O2, and has the advantages of low cost, simple process and easiness in large-scale production.

The invention discloses a donor-receptor type carbon nitride photocatalyst as well as a preparation method and application thereof, and the preparation method of the donor-receptor type carbon nitride photocatalyst comprises the following steps: mixing a carbon nitride precursor with molten salt, and calcining to obtain cyano-modified carbon nitride; and mixing the cyano-modified carbon nitride with 4, 4 '-diphenyldicarboxylic acid, and calcining to realize a covalent bonding reaction, thereby obtaining the donor-receptor type carbon nitride photocatalyst. According to the carbon nitride photocatalyst, an asymmetric donor-acceptor structure is constructed, a strong built-in electric field is induced, meanwhile, cyano serves as a proton / electron repository, the charge separation efficiency and the proton transmission capacity are remarkably improved, and therefore photocatalytic preparation of hydrogen peroxide is efficiently achieved.

This invention discloses a method for preparing hydrogen peroxide using ultra-low temperature photocatalysis. The method includes: adding a photocatalytic material to water or a solution and dispersing it completely, adjusting the pH to obtain a reaction solution; adding O2 to the reaction solution until saturation, and turning on a light source to initiate the photocatalytic reaction; after the reaction, detecting the concentration of H2O2 using potassium iodide-ammonium molybdate spectrophotometry; the photocatalytic material is a semiconductor metal oxide; and the temperature of the photocatalytic reaction is -5 to -60°C. This method significantly increases the reactant concentration by concentrating the catalyst and oxygen in micron-sized intercrystalline water at ultra-low temperatures. Furthermore, the ultra-low temperature allows for rapid desorption of the catalytically generated hydrogen peroxide, inhibiting its decomposition reaction, thereby significantly improving the production of hydrogen peroxide per unit mass and per unit time.

The invention relates to the field of porous materials, in particular to a method for loading metal nanoparticles on a functionalized metal organic framework and catalytic application. The conventional method for loading metal nanoparticles on a metal organic framework carrier is faced with the problem of serious agglomeration caused by high surface energy of atoms, so that the formed particles are large and non-uniform in size, the pore channels of the metal organic framework are blocked, the number of active sites is reduced, and the catalytic performance is seriously influenced. In order to solve the problems, different functionalization regulators are anchored at metal nodes of the metal organic framework, the nucleation and growth processes of metal nanoparticles are regulated and controlled by utilizing the unique coordination effect of the functionalization regulators, the dispersity of the metal nanoparticles is effectively improved, the size of the metal nanoparticles is controllably regulated, and the metal organic framework material is endowed with excellent performance in the aspect of photocatalysis.

The invention discloses a P / S co-doped C3N5 composite material as well as a preparation method and application thereof, and belongs to the technical field of photocatalytic materials. The preparation method comprises the following steps: firstly, calcining 3-amino-1, 2, 4-triazole, so as to obtain powdery g-C3N5; then adding g-C3N5 and sodium hydroxide into water and mixing to obtain a reaction system; the reaction system is subjected to a hydrothermal reaction, and after the reaction is completed, washing, drying and grinding are performed to obtain powdery ultrathin C3N5; the preparation method comprises the following steps: grinding and uniformly mixing ultrathin C3N5, sodium hypophosphite and thioacetamide to obtain mixed powder, and calcining, washing, drying and grinding the mixed powder to obtain the powdery P / S-C3N5 composite material. According to the method, calcination is carried out in two steps, effective and uniform doping of P and S elements in ultrathin C3N5 is facilitated, active sites on the surface of the catalyst are further improved, meanwhile, the selectivity of generating hydrogen peroxide through an oxygen reduction path (ORR) is improved, and therefore the catalytic performance is improved.

The invention discloses a photocatalytic material with a heptazine-triazine structure as well as a preparation method and application of the photocatalytic material. Relates to the field of photocatalysis. The photocatalytic material with the heptazine-triazine structure comprises a boron-doped heptazine-triazine heterojunction structure, and the content of a triazine unit in the heptazine-triazine heterojunction structure is higher than that of a heptazine unit; the raw material of the boron-doped heptazine-triazine heterojunction structure comprises the following components: a boron-containing carbon nitride precursor and alkali metal salt, the raw materials of the boron-containing carbon nitride precursor comprise melamine and a boron source. The photocatalytic material shows excellent performance under visible light, the H2O2 yield can reach 2423 mol L <-1 > h <-1 > (44.1 times of that of traditional carbon nitride), and the hydrogen evolution rate is increased by 70 times; the apparent quantum yield of 450nm single wavelength reaches 14.4%, and the visible light absorption range is effectively expanded; and after continuous 24-hour illumination, the activity is not attenuated, and the stability is excellent.

The present invention belongs to the field of photocatalysis and discloses a method for preparing a Zn3In2S6 photocatalyst with a defective hollow structure and its application in the co-production of hydrogen peroxide and benzaldehyde. The present invention synthesizes the Zn3In2S6 photocatalyst with a defective hollow structure by a solvent thermal method. Zinc sulfate heptahydrate, indium chloride tetrahydrate, thioacetamide, and ethylene glycol are uniformly mixed and then transferred to a polytetrafluoroethylene-lined autoclave for solvent thermal treatment to obtain the Zn3In2S6 photocatalyst with a defective hollow structure. The Zn3In2S6 photocatalyst with a defective hollow structure increases the specific surface area of ​​the material, while also increasing the number of active sites and improving reaction performance. The synthesized Zn3In2S6 photocatalyst with a defective hollow structure has the advantages of simple synthesis operation and being green and pollution-free. In addition, the catalyst has excellent photocatalytic co-production performance and stability for hydrogen peroxide and benzaldehyde.

The invention relates to the technical field of inorganic and organic nano composite materials, and discloses preparation and application of a sulfur vacancy regulated Zn0. 5Cd0. 5S / MIL-68 (In)-NH2 composite material, firstly, MIL-68 (In)-NH2 microrods are synthesized, then the MIL-68 (In)-NH2 microrods are dispersed in deionized water, Zn (NO3) 2.6 H2O, Cd (NO3) 2.4 H2O and thioacetamide are sequentially added, sulfur vacancy is introduced through hydrazine hydrate, the sulfur vacancy regulated Zn0. 5Cd0. 5S / MIL-68 (In)-NH2 composite material is obtained, and the sulfur vacancy regulated Zn0. 5Cd0. 5S / MIL-68 (In)-NH2 composite material is prepared. The catalyst is used for converting light energy into chemical energy under sunlight to realize preparation of chemical energy H2O2 and treatment of MBT wastewater. The prepared composite material has good light absorption performance and light energy conversion activity.

The present invention belongs to the field of semiconductor photocatalysis technology, specifically a COF-TpBpy@VNbC composite photocatalyst and a preparation method thereof. The present invention comprises: etching and peeling VNbAlC to obtain high-quality single-layer / few-layer VNbC nanosheets, and modifying the surface of the VNbC nanosheets by hydroxylation modification; in situ growing a COF-TpBpy layer on the modified VNbC nanosheets through a Schiff base condensation reaction between the aldehyde group and the amino group of the monomer to obtain a heterogeneous structure composite catalyst, denoted as COF-TpBpy@VNbC; by adjusting the amount of VNbC added, COF-TpBpy@VNbC composite catalysts of different proportions are obtained. The catalyst exhibits high selectivity and high activity in a photocatalytic H2O2 synthesis and selective styrene epoxidation coupling reaction system. The present invention has a simple process, low cost, and readily available reactants; and has industrial application prospects.

The invention discloses a method for regulating and controlling sulfur vacancies in sulfide, and relates to the field of functional materials. The preparation method comprises the following specific steps: S1, dissolving metal salt and a sulfur source in deionized water to obtain a mixed solution A; s2, adjusting the pH value of the mixed solution A to 2-5 by using a pH regulator, and adding a sulfur vacancy regulator into the mixed solution A to obtain a mixed solution B; and S3, carrying out a hydrothermal reaction on the mixed solution B, cooling to room temperature, and filtering, washing and drying the reacted solution to obtain the sulfide rich in sulfur vacancies. The sulfur vacancy regulator is introduced before hydrothermal treatment, the sulfide rich in sulfur vacancies can be directly prepared, the process is simple, the concentration of the sulfur vacancies in the sulfide can be directly regulated, and the prepared sulfide has good photocatalytic performance.

The invention discloses an MOFs (Metal-Organic Frameworks) material as well as a preparation method and application thereof. The chemical formula of the MOFs material is Zn (H2PDP); wherein the H2PDP is an organic ligand 2, 7-bis (1H-pyrazole-4-yl) pyrene, and the organic ligand 2, 7-bis (1H-pyrazole-4-yl The MOFs material is crystallized in an orthorhombic crystal system I212121 space group, and the cell parameters are as follows: a is equal to 12.6707 (5), b is equal to 27.9539 (13), c is equal to 16.0906 (13), alpha is equal to 90 degrees, beta is equal to 90 degrees, and gamma is equal to 90 degrees. The invention provides an MOFs material with a novel structure. The material has stability in a high-alkali environment; the photocatalyst can still efficiently produce hydrogen peroxide through photocatalysis under a high-alkali condition.

An aqueous composition comprising: sulfuric acid; a compound comprising an amine moiety; a compound comprising a sulfonic acid moiety; and a peroxide. Said composition being capable of delignifying biomass.

The application discloses anthraquinone-based polysulfate and a preparation method and photocatalytic application thereof, and belongs to the field of polymer material synthesis and photocatalytic technology. The polysulfate takes 2,6-dihydroxyanthraquinone derivative as a core monomer, is connected through a sulfate bond to form a conjugated polymer, and has excellent visible light absorption capacity and electron transport performance. The preparation method takes 2,6-dihydroxyanthraquinone as a starting material, synthesizes a double silyl ether protected anthraquinone intermediate and a thiofluoride activated anthraquinone intermediate respectively, and finally performs polycondensation on the two intermediates under a potassium hydrogen fluoride / crown ether catalytic system. The material can catalyze hydrogen peroxide to be generated from water and oxygen under visible light irradiation, and the yield reaches 2667 μmol·h ‑1 ·g ‑1 , is a new type of efficient photocatalytic material, and has wide application prospects in the fields of green synthesis and environmental catalysis.

The application discloses a method for in-situ growth of perovskite quantum dots on carbon nitride nanosheets, and products and applications thereof. Perovskite quantum dot precursors are mixed and ground with graphite-phase carbon nitride nanosheets to realize mechanical chemical pre-reaction. Then, low-temperature freezing treatment is performed, and the mixture after the freezing treatment is calcined in an inert atmosphere to realize in-situ synthesis of perovskite quantum dots on the carbon nitride nanosheets. The calcined sample is sequentially subjected to water washing, alcohol washing, and then drying to obtain a perovskite quantum dot / graphite-phase carbon nitride nanosheet composite material. The synthesis of the quantum dots is directly synthesized under high-temperature solid-phase conditions without adding ligands, the quantum dots have few interface defects with the carbon nitride, which is beneficial to carrier transmission and eliminates the influence of ligands on photo-generated carriers.

The application discloses an olefin-connected pyridyl covalent organic framework material and a preparation method and application thereof, and belongs to the technical field of photocatalysis. The material is formed by olefin bridging of 2,4,6-trimethyl-1,3,5-triazine monomers and aromatic aldehyde monomers containing pyridine units and bipyridine units, and 2,4,6-trimethyl-1,3,5-triazine, pyridine-2,5-dimethyl formaldehyde or 2,2'-bipyridine-5,5'-dimethyl formaldehyde are heated and reacted under sealed conditions; after the reaction is completed, natural cooling to room temperature is carried out, vacuum filtration is carried out and filter residues are collected, washing is carried out, and vacuum drying is carried out, and the material is obtained. The pyridine and bipyridine units are used for constructing different oxygen adsorption modes of Pauling type and Yeager type respectively, the oxygen reduction reaction path is changed, a two-step single electron path and a one-step two electron path are realized, the photocatalytic efficiency is effectively improved, and the material has a wide application prospect as a photocatalyst for photocatalytic oxygen reduction and synthesis of hydrogen peroxide.

The present invention relates to the technical field of photocatalytic materials, and in particular to a tannic acid@sulfur vacancy cadmium sulfide composite material, a preparation method thereof, and an application thereof. The preparation method provided by the present invention comprises the steps of: S1. preparing a base catalyst; and S2. coating the base catalyst with tannic acid. The method comprises the steps of introducing sulfur vacancies into cadmium sulfide and coating the surface of the sulfur-vacancy cadmium sulfide with tannic acid, wherein the tannic acid is only loaded on the surface of the cadmium sulfide base catalyst as a co-catalyst without changing the crystal structure of the catalyst itself. By introducing sulfur vacancies into the cadmium sulfide, the utilization rate of light is increased, thereby improving the activity of the catalyst. At the same time, by coating with tannic acid, the recombination of photogenerated carriers is suppressed, thereby improving the separation efficiency of surface photogenerated electron-hole pairs, and thus having better catalytic activity, which can better meet the needs of photocatalytic applications and has good application prospects.