89 results about "Silver oxide" patented technology

The nano titanium oxide main body photocatalytic sterilization multi-element material provided by the invention comprises 85%-98% of a nano titanium oxide material, 2%-15% of a perovskite material and a modifier, the modifier comprises silver, silver oxide and graphene, and the modifier comprises a nano titanium oxide main body and a nano titanium oxide main body. The nano titanium oxide main body photocatalytic sterilization multi-element material can fully utilize the characteristics of a perovskite structure material, overcomes the defects of a nano titanium oxide material, improves the light utilization rate, inhibits carrier recombination, improves the antibacterial durability, can utilize ultraviolet light to carry out catalytic sterilization and can also utilize ions to carry out sterilization, and the antibacterial effect is good. Sterilization can be achieved through the photolysis reaction of visible light, the synergistic composite sterilization effect is achieved, harmful germs are rapidly and effectively killed, the environment is kept fresh and safe, and the comprehensive sterilization and deodorization effect can be achieved by adding the modifier; the preparation method of the nano titanium oxide main body photocatalytic sterilization multi-element material provided by the invention is simple in steps, convenient to operate and easy to implement.

The application discloses a heat-insulating and light-shielding curtain and a preparation method thereof, and relates to the field of curtains. The graphene oxide is first prepared into a hydrogel, and modified carbon black is added to improve the light-shielding performance of the curtain; then, silver carboxylate is generated by the reaction between silver oxide and the carboxyl in the hydrogel, so that the antibacterial effect of the curtain is improved; the hydrogel is then frozen and spun, and is woven to obtain an aerogel fabric layer; bamboo charcoal microsphere particles are added to a bottom glue layer, and form spherical protrusions with tin foil, so that the light can be reflected, and the light-shielding effect is improved; the main raw material of a surface glue layer is titanium dioxide modified polyurethane, which is rolled on the surface of the tin foil to further improve the light-shielding, heat-insulating and antibacterial performances; finally, electrostatic flocking is performed to obtain the curtain with the heat-insulating and light-shielding effects.

The invention belongs to the technical field of electrocatalytic carbon dioxide reduction catalysts, and discloses a silver-based catalyst suitable for fluctuating carbon dioxide electrolysis and a preparation method of the silver-based catalyst. The preparation method comprises the following steps: uniformly and continuously dropwise adding a potassium hydroxide solution into a silver nitrate solution to prepare a silver oxide catalyst, and further applying a constant reduction current to the silver oxide catalyst in the presence of carbon dioxide gas for in-situ reduction to prepare the quintuple twin crystal silver-based catalyst. The preparation method disclosed by the invention combines precipitation titration and in-situ electroreduction methods, and has the characteristics of simplicity in operation, greenness, high efficiency and suitability for mass production; meanwhile, the catalyst can maintain high selectivity to carbon monoxide products in an extremely wide potential window range of 3V when being used in an electro-catalysis carbon dioxide conversion reaction, and is very suitable for being directly matched and coupled with fluctuating renewable energy sources.

The present application relates to the field of medicine synthesis, and discloses a preparation method and application of brominated piperonal carboxylic acid, wherein the brominated piperonal carboxylic acid compound is prepared from o-vanillin as a starting material through acetyl protection, bromination reaction, deprotection and demethylation reaction, cyclization reaction and Pinnick oxidation reaction.No longer through a brominated piperonal intermediate, and without using a live LDA reagent low-temperature lithiation reaction, the safety and stability are greatly improved.The deprotection and demethylation reaction is carried out in one pot, and the use of boron tribromide and other reagents is avoided;finally, the oxidation step from aldehyde to acid avoids using traditional silver oxide or potassium permanganate oxidation, and adopts Pinnick oxidation, which is economic, environmental protection and cost reduction, and greatly improves the yield.The whole has the advantages of easy-to-obtain raw materials, short steps, mild reaction conditions, low production cost, environmental protection, high yield and high purity, and can meet the high quality requirements of pharmaceutical products.

The application discloses a method for comprehensive recovery and utilization of oxidized lead-tin-silver ore, which comprises the steps of pretreatment, oxidized lead flotation, mixed concentrate concentration, table operation and post-treatment. The oxidized lead-silver-tin is recovered through the combined process of flotation and gravity separation, and the process flow is simple, easy to operate, energy-saving, environment-friendly, and good in applicability. The obtained lead concentrate is high in lead grade and high in recovery rate, and tin and silver are comprehensively recovered and utilized in the form of various valuable minerals.

The present invention provides a method for producing silver nanoparticles, which can produce silver nanoparticles having a fine particle diameter with high production efficiency. One embodiment of the present invention is a method for producing silver nanoparticles, comprising: a raw material preparation step for preparing a silver oxide suspension containing a silver oxide and a solvent; and a silver nanoparticle formation step in which silver nanoparticles are formed by irradiating a suspension of a silver oxide with microwaves at an absorption amount in the range of 41-81 W / mL while flowing the suspension.

The present application provides a kind of defective catalyst and its preparation method and application, the defective catalyst includes defective titanium dioxide carrier and the metal oxide active center supported on the defective titanium dioxide carrier;The metal oxide active center includes silver oxide;The defective catalyst has high specific surface area and high catalytic activity, can be used for catalytic degradation N-VOCs and synergistic production NH3, the conversion rate of N-VOCs is preferably up to 98.0% or more, while the yield of NH3 is preferably up to 100%;Realize the efficient degradation of N-VOCs and its green resource utilization of nitrogen resource.

The application provides a preparation method of a catalyst and a preparation method of HMFCA, and relates to the technical field of organic synthesis. In the application, an inorganic base and an oxidant are used to oxidize a silver salt aqueous solution to obtain a silver oxide catalyst with good oxidation performance. The silver oxide catalyst is used to oxidize HMF under the action of the base and the oxidant, and the conversion rate of HMF is high and the selectivity is good.

The invention discloses antioxidant silver-coated copper powder and a preparation process thereof, and relates to the technical field of silver-coated copper powder. The process comprises the steps of copper powder pretreatment, two-step complexing silver coating, hydrophobic membrane forming and airflow powder mixing. The compactness and oxidation resistance of a silver layer on the surface of the copper powder are enhanced through two-step complexing, the oxidation resistance of the silver-coated copper powder is improved to a great extent, meanwhile, the cost of the treatment, complexing and silver plating processes of the copper powder is controlled to a low degree, and the cost is reduced by combining organic passivation treatment; and the preparation cost of the silver-coated copper powder is low, batch production of the silver-coated copper powder is facilitated, and the market competitiveness is improved.

This invention belongs to the field of meat preservation films in food packaging materials, specifically relating to a preservation film material. The invention employs a chemical precipitation method to deposit the metallic antibacterial agent silver oxide onto plant fibers, and adds tannic acid, a polyphenolic compound with excellent antioxidant properties, mixed with a polymer matrix and solvent to prepare a spinning precursor solution. Then, an antibacterial and antioxidant film is prepared by electrospinning. When applied to meat preservation, it can extend the shelf life of chilled meat by more than 6 days. This invention utilizes the reduction of silver ions released from silver oxide to nano-silver under the action of tannic acid, achieving a synergistic effect of antibacterial and antioxidant properties with tannic acid. It also possesses good mechanical properties and hydrophobicity, showing broad application prospects in the meat and fruit / vegetable preservation industries.

The invention discloses a radioactive methyl iodide filtering material and a preparation method thereof, and belongs to the technical field of nuclear fuel waste gas treatment. The preparation method comprises the following steps: preparing a nitrogen-carbon skeleton from a reaction monomer through a cross-linking reaction; dispersing the nitrogen-carbon skeleton, a silver nitrate solution and an ionic liquid in water to obtain a mixed solution; the mixed solution is subjected to nano silver oxide in-situ growth in the environment of ultraviolet lamp irradiation and ultrasonic oscillation, and the radioactive methyl iodide filtering material is prepared. The radioactive methyl iodide filtering material is a nano silver oxide in-situ loaded nitrogen-carbon skeleton composite material and can be used as a radioactive methyl iodide filtering and storing material, efficient adsorption of radioactive methyl iodide is achieved through the chemical adsorption effect of nano silver oxide and methyl iodide, meanwhile, it is ensured that the adsorption process is stable and irreversible, and the radioactive methyl iodide filtering material can be used for filtering and storing radioactive methyl iodide. And no methyl iodide is released in a deep stratum treatment environment.

The invention discloses low-temperature non-pressure rapid sintering silver paste and a preparation method thereof, and belongs to the technical field of electronic component packaging materials. The silver paste comprises the following components in percentage by weight: 75wt%-82wt% of silver sheet particles, wherein the silver sheet particles comprise silver sheet powder particles with sheet structures and fatty acid and / or fatty acid silver layers covering the surfaces of the silver sheet powder particles; the modified silver oxide comprises silver oxide particles, a silver particle layer coating the outer surfaces of the silver oxide particles, and a fatty acid layer coating the outer surface of the silver particle layer; the sintering silver paste comprises the following components in percentage by weight: 20-30% of silver paste and 8-20% of organic solvent, the organic solvent is a mixed solution of terpilenol and 2-ethyl-1, 3-hexanediol, and the sintering silver paste does not need a pre-baking step and can be rapidly sintered at low temperature without pressure. The packaging process of connection of the chip and the metalized substrate is simplified, the production efficiency is improved, and the manufacturing cost is reduced.

The present application relates to silver powder preparation technical field, specifically to a kind of solar cell back silver paste silver powder preparation method;The silver powder preparation method includes: preparation silver powder, preparation pretreatment silver powder and preparation solar cell back silver paste silver powder three processes;In the present application, glycerol is used as reducing agent, which plays the dual role of reducing agent and emulsifier, can effectively regulate the size of silver powder, reduce the amount of dispersing agent;In addition, silver nitrate solution and sodium hydroxide solution are used as raw materials in the present application, and silver oxide is used as intermediate, and the process design of in-situ reduction is used, so that the particle dispersion of silver powder is good in the reaction process, and the particle size distribution is uniform;In addition, the chemical bond formed by silver powder and the polymer grafted on its surface will be broken under heating conditions, that is, while improving the dispersion performance of silver powder, the conductivity of silver powder will not be affected, effectively ensuring the dispersion performance and conductivity of silver powder.

The invention provides a special coating agent for an antibacterial lamp tube and a preparation method thereof, and relates to the technical field of antibacterial material preparation, the preparation method comprises the following steps: carrying out heating dissolution treatment on an initial mixture through a constant temperature heating device to form a dissolved mixed solution, carrying out cooling treatment on the dissolved mixed solution through a cooling device to form a cooled mixture, the heating and dissolving treatment adopts ultrasonic-assisted dispersion, and the cooling treatment adopts a pH online monitoring and dynamic adjustment combined mode. According to the special coating agent for the antibacterial lamp tube and the preparation method of the special coating agent, the uniformity and stability of the coating agent are ensured by accurately controlling the proportions of the components such as the nanoscale silver oxide, the titanium dioxide powder and the nanoscale zinc oxide and adopting technologies such as ultrasonic-assisted dispersion and constant-temperature heating. And the fine preparation process is beneficial to improving the antibacterial performance and the photocatalytic effect of the antibacterial lamp tube.

The invention discloses a synthesis method of 2, 4, 5-trifluorophenylacetic acid, and belongs to the technical field of organic chemical industry, 1, 2, 4-trifluorobenzene is used as a raw material and reacts with tetrachloromethane and aluminum chloride passivated by pseudo-boehmite to generate 2, 4, 5-trifluoro-(trichloromethyl) benzene, after the reaction is finished, an oil phase is separated and extracted, a zinc chloride aqueous solution and 2, 4, 5-trifluoro-(trichloromethyl) benzene are dropwise added into the oil phase, a reaction is carried out, and the 2, 4, 5-trifluoro-(trichloromethyl) benzene is obtained. The preparation method comprises the following steps: hydrolyzing 2, 4, 5-trifluoro-(trichloromethyl) benzene to generate 2, 4, 5-trifluorobenzoyl chloride, then adding azido methane and silver oxide, and converting acyl chloride into carboxylic acid by utilizing an Ardt-Eister reaction to generate 2, 4, 5-trifluorophenylacetic acid; the synthesis route is simple to operate, the route is simplified, the use of high-toxicity raw materials in the intermediate process is reduced, the corrosion to equipment is low, the risk is low, the generation amount of byproducts is reduced, and the separation is easier, so that the synthesis route is a safer, environment-friendly and high-selectivity route for synthesizing the 2, 4, 5-trifluorophenylacetic acid.

This invention provides a high-temperature resistant catalyst for the methanol-to-formaldehyde oxidation process and its preparation method, belonging to the field of catalysts. The catalyst comprises a high-temperature resistant material, an active component, an active additive, and a molding aid. The high-temperature resistant material includes a composite oxide of magnesium oxide and aluminum oxide or aluminum oxide and silicon oxide; the active component includes iron oxide and molybdenum oxide; the active additive includes silver oxide, niobium oxide, zinc oxide, and erbium oxide; and the molding aid includes aluminum stearate, calcium stearate, magnesium stearate, and graphite. This invention also provides a method for preparing the catalyst. By adding high-temperature resistant materials and active additives during the catalyst preparation process, this invention enables the catalyst to maintain high strength and catalytic activity even after long-term operation under high-temperature conditions, resulting in a high yield of formaldehyde from methanol oxidation, good thermal stability, and extended catalyst lifespan, thus showing broad application prospects in industry.

A method for preparing a silver impregnation solution comprises (a) charging a neutralization reactor R1 with an aqueous organic amine; (b) adding oxalic acid powder through a first feeding conduit to the neutralization reactor R1 to obtain an aqueous oxalic acid-organic amine solution; (c) directing the aqueous oxalic acid-organic amine solution from the neutralization reactor to a complexation reactor R2; (d) adding particulate silver oxide through a second feeding conduit to the complexation reactor R2 to obtain a silver impregnation solution; and, optionally, (e) subjecting the silver impregnation solution to filtration. The silver impregnation solution is used for producing a catalyst effective in the oxidative conversion of ethylene to ethylene oxide. The method allows for the preparation of a silver impregnation solution in an efficient and occupationally and environmentally safe way. Security hazards which can occur when oxalic acid and silver oxide are added to an aqueous amine solution using the same powder feeding equipment or the same reactor are avoided.

The invention discloses a cage compound for specific recognition of lithium ions and a synthesis method of the cage compound, and belongs to the technical field of synthetic chemistry. The synthesis method comprises the following steps: (1) preparation: taking a tri-imidazolium salt compound, silver oxide and alkali metal carbonate as raw materials, mixing, and carrying out mechanical ball milling, so as to obtain the product; and (2) preparation: taking tetrahydrothiophene aurous chloride as a raw material, and reacting in a solvent in a dark place. The synthesis method has the advantages that synthesis is simple, raw materials are easy to obtain, the method is easy to operate, the reaction rate is high, the reaction condition is mild, the yield is high, the product singleness is good, the stability is good and the like, and the prepared cage-shaped compound has high selectivity and high stability in lithium ion recognition and is expected to be applied to lithium ion acceptors, sensors and the like.

The present application provides a kind of synthesis method of Biolimus A9, the method steps as follows: rapamycin and monohalogen ether are dissolved in polar aprotic solvent, then silver oxide is added, avoid light processing, stirring is carried out at room temperature to 60 DEG C or below, after reaction, remove insoluble solid by filtration, after extraction purification of filtrate, product Biolimus A9 is obtained;The halogen of the monohalogen ether is chlorine, bromine or iodine.The present application has the characteristics of mild reaction condition and low reaction temperature, high product yield, less reaction byproduct, especially the byproduct of lactone ring opening is effectively controlled;And also has the advantage of low reaction cost.

The application discloses a silver-nickel electric contact material added with lanthanum oxide and a preparation method thereof. The method comprises the following steps: calculating the required amounts of lanthanum oxide, nickel powder and Ag element for preparing the contact, weighing the Ag element as silver nitrate and preparing a silver nitrate solution by adding water; first, reacting the lanthanum oxide with the silver nitrate solution, calculating the total amount of sodium hydroxide required for completely reacting the generated lanthanum nitrate and the unreacted silver nitrate with sodium hydroxide to generate lanthanum hydroxide and silver oxide respectively, weighing the sodium hydroxide and preparing a sodium hydroxide solution by adding water; then, reacting the sodium hydroxide solution with the aforementioned suspension to obtain a composite powder of silver oxide and lanthanum hydroxide; washing the composite powder to neutral, drying and roasting to obtain a silver-lanthanum hydroxide composite powder; and mixing the obtained silver-lanthanum hydroxide composite powder with the nickel powder, and then performing the processes of isostatic pressing, sintering and extrusion to obtain the silver-nickel electric contact material. The method can make the lanthanum oxide more uniformly distributed in the silver matrix, and obtain a uniform metallographic structure.

The invention relates to the technical field of plastic modification, and particularly discloses a water body deodorization plastic functional master batch and a preparation method thereof. Aiming at the defects of poor slow release property, high processing thermal decomposition rate and single function of the traditional plastic deodorization master batch, the invention provides a method for loading a plant extract water-soluble deodorant through vacuum adsorption of mesoporous silica microspheres, so that high loading capacity and leakage prevention are realized; nano silver oxide is adopted as a Pickering emulsion stabilizer, the surfaces of loaded microspheres are coated with crosslinked polystyrene shells through an inverse emulsion template polymerization method, and the triple functions of blocking precipitation of a deodorant in processing, slowly releasing silver ions, resisting bacteria and cooperatively deodorizing and delaying the release rate of the deodorant are synchronously achieved; a PLA / PBAT (polylactic acid / poly (butylene adipate-co-terephthalate)) mixture with an adjustable proportion is used as a master batch carrier, and the master batch carrier and loaded microspheres are subjected to internal mixing and single-screw extrusion to obtain the deodorizing plastic functional master batch. The master batch supports dual-mode application of direct putting into a water body or injection molding of a container, overcomes the problems of long-acting slow release and high-temperature processing stability, has the characteristics of full biodegradation and biosafety, and is suitable for fish ponds, hydroponic systems and other scenes.

The purpose of the present invention is to provide a silver oxide paste capable of achieving an excellent bonding strength even from bonding at a low temperature and capable of yielding a bonding layer having a thickness exceeding 20 µm. The present invention provides a silver oxide paste containing: silver oxide particles that are in flake shapes and have an average thickness of 1-100 nm and D50 of 100-350 nm; and silver-containing particles having an aspect ratio of 6.0 or lower and D50 of 2.0 µm or smaller.

A method for producing a particulate water-insoluble inorganic material comprising silver oxide and ruthenium oxide, and a preparation containing water, particles of the water-insoluble inorganic material, at least one silver oxide precursor, and at least one ruthenium oxide precursor, by drying and thermal decomposition treatment carried out in a non-reducing atmosphere.

The invention belongs to the technical field of packaging, and particularly relates to silver paste for a power amplifier and a preparation method thereof.The preparation method comprises the steps that a silver source material is dissolved in deionized water to obtain a silver source solution, an alkaline solution is dropwise added, stirring reaction and separation are conducted to obtain silver oxide precipitates, the silver oxide precipitates are added into a long-chain alcohol solvent, and the silver paste is obtained; sieving to obtain modified silver oxide active powder; the preparation method comprises the following steps: adding a polyol solvent and resin into a reaction kettle, heating and stirring, adding a functional auxiliary agent, continuously stirring and dispersing, and cooling to obtain a premixed solution, and mixing the premixed solution and the silver complex solution, continuously adding the modified silver oxide active powder, and heating and stirring to obtain the silver paste for the power amplifier. The technical characteristics of the whole preparation steps form functional complementation, so that the problem that traditional silver paste cannot be compacted into silver is solved.

The invention discloses a low-temperature fast curing silver paste for an FPC antenna and a preparation method thereof, and belongs to the technical field of FPC antennae, the silver paste comprises a composite conductive filler, a composite resin system, a solvent and an auxiliary agent system according to a mass ratio of (2.0-3.5): 1: (0.6-1.0), wherein the composite conductive filler is formed by compounding supported silver oxide-MXene composite powder, micron-sized flaky silver powder and submicron-sized spherical silver powder according to the mass ratio of 1: (10-15): (6-8); the composite resin system is formed by compounding organic silicon modified polyurethane acrylate resin, an epoxy resin curing component and a reactive diluent according to a mass ratio of (12-14): (4-6): 1, and contains a photoinitiator; the epoxy resin curing component is composed of bisphenol A epoxy resin and a latent microencapsulated dicyandiamide curing agent; according to the invention, the comprehensive balance of the conductivity, adhesion, flexibility and long-term reliability of the silver paste is successfully realized under the condition that the curing temperature is obviously reduced, and a key material solution is provided for the manufacturing of high-reliability flexible electronic devices.

The application belongs to the field of catalysis technology, and particularly relates to a process for preparing chloro iridic acid solution by using waste iridium black catalyst, which comprises the following steps: step S1, alkali fusion of silver peroxide: waste iridium black catalyst is calcined with silver peroxide at 200-400 DEG C for 2-5h; step S2, dissolution of crude iridium in hydrochloric acid to obtain crude chloro iridic acid solution and filter residue rich in metallic silver; step S3, impurity removal: column chromatography separation is used to remove impurities from the crude chloro iridic acid solution; step S4, vacuum concentration of the purified chloro iridic acid solution. The waste iridium black catalyst is mixed with silver peroxide and calcined, so that high-efficiency conversion of the insoluble iridium black can be realized at normal pressure and low temperature, and the generated silver after the reaction can be regenerated into silver peroxide, thereby realizing reagent circulation and reducing the introduction of impurities. The resin is used for impurity removal, so that new impurity ions are not introduced to pollute the product during the purification of chloro iridic acid, and the prepared chloro iridic acid solution has the characteristics of nitrate-free and high purity.

Topical formulations for application to exposed body tissue.

This invention relates to the field of coating technology, and more particularly to a wear-resistant and antibacterial corrosion-resistant coating, comprising, by weight, 100 parts of epoxy resin matrix, 5 to 20 parts of nano-antibacterial wear-resistant composite material, 20 to 40 parts of curing agent, 10 to 25 parts of diluent, 0.3 to 1 part of defoamer, 0.5 to 2 parts of leveling agent, 2 to 8 parts of nano-wear-resistant synergistic filler, and 1 to 5 parts of layered anti-permeability and anti-corrosion filler; in the nano-antibacterial wear-resistant composite material, RE is a rare earth oxide prepared by the sol-gel method, and AgO is nano-silver oxide with a particle size of 1nm to 100nm. In this invention, by employing chemical grafting modification technology of nano-antibacterial wear-resistant composite material and epoxy resin matrix, and combining the multifunctional compound design of nano-wear-resistant synergistic filler and layered anti-permeability and anti-corrosion filler, the wear-resistant and antibacterial corrosion-resistant coating has significant advantages such as long-lasting antibacterial properties, wear and impact resistance, strong adhesion, high temperature and high pressure resistance, and anti-permeability and anti-corrosion properties, and is suitable for protective coating of the inner wall of oil and gas field production and transportation pipelines.

The purpose of the present invention is to provide a button type alkaline battery excellent in battery characteristics such as storage characteristics and discharge characteristics.　This button type alkaline battery according to the present invention has a positive electrode, a negative electrode, and a separator enclosed in a battery container that has an outer can and a sealing can. The positive electrode has a mixture layer A containing a silver oxide as a positive electrode active material and a mixture layer B containing a manganese oxide as a positive electrode active material, where the inner bottom surface of the outer can faces the mixture layer A and is electrically connected thereto, and the separator faces the mixture layer B. The mixture layer A contains 98 mass % or more of the silver oxide and 0.1 mass % or more of a carbon material. The mixture layer B contains 94 mass % or more of the manganese oxide and 0.5 mass % or more of the carbon material, where the mass ratio of the silver oxide and the manganese oxide in the entire positive electrode is 55:45-95:5.

The invention belongs to the technical field of catalysis, and particularly relates to a process for preparing a chloroiridic acid solution by using a waste iridium black catalyst, which comprises the following steps: S1, silver peroxide alkali fusion: roasting the waste iridium black catalyst and silver peroxide at 200-400 DEG C for 2-5 hours; s2, dissolving the crude iridium with hydrochloric acid to obtain a crude chloroiridic acid solution and filter residues rich in metal silver; s3, impurity removal: removing impurities from the crude chloroiridic acid solution by utilizing column chromatography separation; and S4, carrying out vacuum concentration on the purified chloroiridic acid solution. According to the method, silver peroxide and the waste iridium black catalyst are uniformly mixed and roasted, efficient conversion of indissolvable iridium black can be achieved at normal pressure and medium and low temperature, silver generated after reaction can be regenerated into silver peroxide, reagent circulation is achieved, and introduction of impurities is reduced; new impurity ions are not introduced to pollute the product in the chloroiridic acid purification process, and the prepared chloroiridic acid solution has the characteristics of no nitrate and high purity.