95results about "Silve compounds" patented technology

The invention provides a graphene-based hydrogen sulfide gas sensor and a preparation method thereof, and relates to the technical field of gas sensors. The preparation method of the graphene-based hydrogen sulfide gas sensor comprises the following steps: soaking the wood substrate in a mixed metal salt solution containing a water-soluble silver salt and a water-soluble transition metal salt; irradiating the soaked wood substrate by using a laser beam at room temperature under the condition of no shielding gas, so that lignin and cellulose in the wood substrate are cracked and reconstructed to form graphene; meanwhile, the mixed metal salt immersed in the wood substrate is decomposed to form bimetallic oxide nanoparticles including silver oxide nanoparticles and transition metal oxide nanoparticles, and the bimetallic oxide nanoparticles are dispersed on the surface of each layer of graphene to obtain a sensitive layer; and coating conductive materials on the wooden substrate and on the two sides of the sensitive layer to form a connecting electrode in contact with the sensitive layer, thereby obtaining the graphene-based hydrogen sulfide gas sensor.

Particular embodiments may provide an anode material, comprising a compound of formula Li2—X—Y, wherein: X and Y are each independently a metal atom or a metalloid atom; the anode material has a discharge potential of less than about 0.4 V vs. Li / Li+; and the molar ratio of Li:X:Y is 2:1:1.

The invention discloses a wide-spectrum electromagnetic wave modulation method based on silver-based chalcogenide, and belongs to the technical field of electromagnetic wave modulation. According to the invention, the abrupt-change modulation of 1GHz-300THz wide-spectrum electromagnetic waves is realized based on the electronic phase change characteristic of the metal insulator under the triggering of the silver-based chalcogenide under the characteristic external field, and the resonant structure design is combined, so that the functions and applications of electromagnetic wave switching, electromagnetic wave intelligent shielding, dynamic information communication encryption, multi-spectrum camouflage and passive electromagnetic wave protection are realized. The main conception is that a silver-based chalcogenide material with an electronic phase change characteristic is introduced as a sensitive medium, and mutation of electromagnetic wave optical characteristics covering microwave, terahertz and infrared frequency bands caused by electronic phase change of the silver-based chalcogenide is triggered by utilizing characteristic temperature, characteristic pressure and characteristic current. According to the invention, the technical barrier of wide spectrum response and multi-mode dynamic modulation is broken through, and the modulation effect can be cooperatively regulated and controlled by the components of the silver-based chalcogenide material and the structure of the resonant array.

The invention relates to the technical field of silver nitrate preparation, in particular to a production method of high-purity silver nitrate. According to the method, impurities are precipitated by adopting an impurity removing agent, then the impurities are removed by utilizing solid-liquid separation, and impurity metals and impurities in the silver nitrate solution are subjected to chemical reaction and physical solid-liquid separation by virtue of three-stage precision filtering equipment, so that the impurity content of the separated silver nitrate solution is relatively low, and meanwhile, the filtering parameter requirements are specified; according to the method, impurities are effectively removed, introduction of other ions is avoided, the purity of silver nitrate is guaranteed, the production efficiency is improved, the risk of secondary pollution is reduced, the product quality is improved, the production period is shortened, the single-batch treatment capacity is large, the product yield is high, the labor amount is reduced, and labor personnel are reduced.

The embodiment of the invention provides a preparation method of octahedral Ag2O nano-enzyme and a method for detecting H2O2 through a colorimetric method, and relates to the technical field of H2O2 detection. The method for detecting H2O2 by using the colorimetric method comprises the following steps: step S11, taking a plurality of centrifugal tubes, adding quantitative Ag2O solution and H2O2 with different concentrations into each centrifugal tube, and uniformly mixing; step S12, adding a NaAc-Hac buffer solution and a TMB (Tetramethylbenzidine) solution into each centrifugal tube treated in the step S11 to form an Ag2O-TMB-H2O2 reaction system, heating the Ag2O-TMB-H2O2 reaction system in each centrifugal tube in a water bath for a preset time, and observing the color change of the solution in each centrifugal tube; and step S13, determining a light absorption value of the Ag2O-TMB-H2O2 reaction system at a preset wavelength through an ultraviolet photometer, and recording data. The method for detecting H2O2 through the colorimetric method has the advantages of being simple in operation process, accurate in detection, visual in result and the like.

Provided is a production method for semiconductor nanoparticles that can exhibit band edge emission at a short peak emission wavelength. The production method for semiconductor nanoparticles involves obtaining a first mixture that includes a Ag salt, an In salt, a compound that includes Ga and S, and an organic solvent and performing a heat treatment on the first mixture at a temperature of 125°C–300°C to obtain first semiconductor nanoparticles.

The present invention refers to an antimicrobial composite material based on a semiconductor (WO3), a metal (Ag), and a carbon support. The present invention also relates to the procedure of its preparation from chitosan and soluble salts of Ag and W. The antimicrobial material can be used as a surface coating or additive in many different areas, such as automotive and construction industry.

The invention relates to a silver-nitrate recovery method comprising the process steps of preparing a nitric-acid solution in a reactor tank and feeding silver sludge into the prepared acid solution to obtain an intermediate product. The silver-nitrate recovery method further comprises introducing N2 onto the intermediate product, sweeping the resulting NOx gases with the introduced N2 and reacting them with H2O2 so as to eliminate them, and collecting the silver nitrate formed in a vessel.

A sintering powder comprising: a particulate having a mean longest diameter of less than 10 microns, wherein at least some of the particles forming the particulate comprise a metal at least partially coated with a capping agent. A sintering paste and sintering film comprising the sintering powder. A method for making a sintered joint by sintering the sintering powder, paste, or film in the vicinity of two or more workpieces.

The present invention relates to a nanoparticle system comprising a metal selected from silver and gold, coated with polyethylene glycol (PEG) and functionalised with a polyphenol organic acid selected from caffeic acid, gallic acid and ferulic acid. The present invention also relates to a method for manufacturing said nanoparticle system and to the therapeutic and cosmetic use of said nanoparticle system.

The invention provides a deleading agent FT236 and a preparation method and application thereof, the deleading agent FT236 is prepared by taking cellulose nanocrystals CNC as a matrix, diethylenetriamine pentaacetic acid DTPA as a collecting agent, gamma-mercaptopropyltrimethoxysilane MPTMS as a cross-linking agent and chitosan quaternary ammonium salt HTCC as a flocculating agent through the steps of main reaction and post-treatment. The nano structure of the CNC substrate can uniformly load DTPA and MPTMS to provide a stable framework; a collecting agent DTPA is extremely high in chelating capacity for lead ions and is not combined with silver ions, and loss of precious metal is avoided; mPTMS can strengthen the structural stability of the medicament; the HTCC has flocculation activity and can promote agglomeration of the nanoparticles.

The invention relates to a sulfur-gallium-silver-sodium compound and a sulfur-gallium-silver-sodium infrared nonlinear optical crystal as well as a preparation method and application thereof, the molecular formula of the compound is NaAg3Ga8S14, the molecular weight is 1353.20 g / mol, the compound has an asymmetric center and is crystallized in a Cm space group of a monoclinic system, and the cell parameters are as follows: a is equal to 12.2616 (8), b is equal to 11.0956 (7), c is equal to 9.2131 (6), beta is equal to 114.981 (2) degrees, Z is equal to 2, and the volume is 1136.18 (13) 3. The crystal is prepared by a high-temperature melt method, a chemical vapor transport method or a Bridgman-Stockbarger method. The crystal has the advantages of being high in laser damage resistance, moderate in nonlinear optical effect, wide in light-transmitting wave band, large in hardness, good in mechanical performance, not prone to fragmentation and deliquescence, easy to process and store and the like, and can be used for manufacturing infrared nonlinear optical devices.

Disclosed is a method for safe oxidative dissolution of metallic silver, comprising the following steps: step 1, preparing a silver dissolving solution, the silver dissolving solution being a solution containing an ammonium salt; and step 2, mixing metallic silver, the silver dissolving solution, and hydrogen peroxide, to cause the metal silver to undergo a chemical reaction in the silver dissolving reaction solution containing the silver dissolving solution and the hydrogen peroxide, to generate a silver salt and / or a silver complex product, and, during the reaction process, controlling the pH value of the silver dissolving reaction solution to be pH 0.5-10.5. The present invention achieves safe production during a process of dissolving metallic silver, reduces pollution, and lowers energy consumption.

The invention discloses a process for preparing high-purity silver nitrate from coarse silver powder, and belongs to the technical field of silver nitrate preparation, the technical scheme is characterized in that the process for preparing the high-purity silver nitrate from the coarse silver powder comprises the following steps: S1, washing, drying and grinding the coarse silver powder to obtain fine silver powder; s2, after the fine silver powder, electronic-grade nitric acid and water react, filtering is conducted, and a silver nitrate solution is obtained; s3, reacting the silver nitrate solution with an acidic sodium chloride solution to generate a silver chloride precipitate; s4, adding an acidic sodium chlorate solution into the silver chloride precipitate, and filtering after reaction to obtain silver chloride; s5, after silver chloride and an alkaline hydrazine hydrate solution react, filtering is conducted, and high-purity silver powder is obtained; s6, the high-purity silver powder reacts with electronic-grade nitric acid and water to prepare a dilute nitric acid solution; s7, the dilute nitric acid solution is subjected to evaporative crystallization to obtain high-purity silver nitrate, high-purity silver powder is obtained through a two-step impurity removal method and reduction of silver chloride, and then the high-purity silver powder reacts with electronic-grade nitric acid to obtain the high-purity silver nitrate.

This invention relates to the field of nanocomposite materials technology, specifically to a carbon-based silver sulfide composite aerogel with synergistically enhanced light-harvesting and biofouling resistance, its preparation method, and its applications. The method involves pouring a chitosan-graphene solution into a polystyrene mold and using different cryogenic casting methods to obtain chitosan-graphene aerogels with different orientations. Carbonization under a N2 atmosphere yields carbon-based aerogels with different structures. Immersion in a tannic acid-Tris solution allows for the adsorption of tannic acid molecules. After washing with deionized water, the aerogels are immersed in a silver nitrate solution to form tannic acid-silver ion complexes. Further washing with deionized water and immersion in a thioacetamide solution yields carbon-based silver sulfide composite aerogels with different structures. This method solves the problem of performance loss due to biofouling in carbon-based three-dimensional porous materials. The carbon-based silver sulfide aerogel exhibits superior light absorption and photothermal properties compared to carbon-based zinc oxide aerogels, overcoming the problem of weakened evaporation performance in conventional anti-biofouling designs.

To provide an oxide complex improved in resistance to dissolution of a silver compound in water, adhesion to a substrate, and the like.SOLUTION: The invention provides an oxide complex.SELECTED DRAWING: None

Provided is a method of producing semiconductor nanoparticles exhibiting band-edge emission with a short emission peak wavelength. The method of producing semiconductor nanoparticles comprises: obtaining a first mixture that contains a Ag salt, an In salt, a compound containing Ga and S, and an organic solvent; and performing a heat treatment of the first mixture at a temperature in a range of 125° C. or higher and 300° C. or lower to obtain first semiconductor nanoparticles.

The invention provides a synergistic preparation method of a silver-based chalcogenide electronic phase change multi-dimensional material, and relates to the technical field of inorganic functional materials. According to the silver-based chalcogenide electronic phase change multi-dimensional material collaborative preparation method, the ion concentration, the pH value and the temperature of various precursors are sequentially set in the same precursor solution environment, and the relationship between the ion equilibrium concentration and the reaction equilibrium between ions in a solution system is dynamically adjusted step by step, so that the silver-based chalcogenide electronic phase change multi-dimensional material is obtained. The synergistic preparation of the silver-based chalcogenide electronic phase change multi-dimensional material is realized. The method has the advantage that the collaborative preparation of the multi-component silver-based chalcogenide electronic phase change material film and powder can be realized. The prepared multi-component silver-based chalcogenide electronic phase change material has the metal insulator phase change characteristic at the characteristic temperature, and has potential application value in the aspects of mutation type thermistors, infrared camouflage and microwave weapon protection.

The invention relates to the technical field of scintillator materials, in particular to a scintillator material, a scintillator film and a preparation method and application of the scintillator material and the scintillator film. The preparation method of the scintillator material comprises the following steps: mixing RbCl, AgCl and LiCl in a first solvent, heating and stirring to obtain a precursor solution; and adding the precursor solution into an anti-solvent, and carrying out centrifugal separation to obtain the Li-doped Rb2AgCl3 scintillator material. The Li-doped Rb2AgCl3 scintillator material can be prepared by doping Li in an Rb2AgCl3 system, and the obtained scintillator material is short in attenuation life, high in stability, high in quantum efficiency, high in light yield and suitable for dynamic real-time X-ray imaging.

The invention belongs to the technical field of conveying, and particularly relates to an accurate matching conveying device for silver nitrate production and a production process. The invention provides an accurate proportioning and conveying device for silver nitrate production, which comprises a metering pump, a water outlet end of which is provided with a connecting pipe communicated with an accommodating tank; the adjusting assembly is hinged to the water outlet of the connecting pipe, and the adjusting assembly is suitable for opening and closing the connecting pipe; when the metering pump conveys liquid into the containing tank, the fluid pushes the adjusting assembly to turn over outwards. The adjusting assembly is suitable for blocking the water flow direction at the water outlet of the connecting pipe; when the metering pump stops working, the adjusting assembly is suitable for sealing the water outlet so that the connecting pipe can be filled with liquid. When the metering pump conveys liquid into the containing tank, the adjusting assembly can adjust the water flow direction of the liquid, and the situation that the liquid is splashed out of the containing tank due to too large pressure is avoided; and when the metering pump stops working, the volume of the liquid actually flowing into the accommodating tank can be accurately metered, so that the conveying and metering accuracy is improved.

The invention belongs to the technical field of non-ferrous metal smelting environmental protection, and particularly relates to a silver nitrate electrolytic waste liquid regeneration and copper recovery method which comprises the following steps: (1) heating silver-containing electrolytic waste liquid, dropwise adding a sodium hydroxide solution to react in a stirring state, and filtering to obtain copper-removed filtrate and copper hydroxide precipitate; (2) heating the copper-removed filtrate, dropwise adding a sodium hydroxide solution to react under a stirring state, and filtering to obtain filtrate and silver hydroxide precipitate; and (3) adding the silver hydroxide precipitate into a nitric acid solution to prepare the silver nitrate electrolyte. According to the method, a sodium hydroxide solution is added into the silver-containing waste electrolyte, copper ions and silver ions in the silver nitrate waste electrolyte respectively react with sodium hydroxide to generate a copper hydroxide precipitate and a silver hydroxide precipitate through graded regulation and control of the pH value, and the silver hydroxide precipitate is regenerated into a silver nitrate solution after nitric acid is added into the silver hydroxide precipitate. The method is easy and convenient to operate, good in impurity removal effect and high in copper recovery rate.

The application provides a single-core double-module graphene-based gas sensor and a preparation method thereof, and relates to the technical field of gas sensors.The preparation method comprises the following steps: dividing the main surface of a wooden substrate into a first surface and a second surface which are arranged adjacently; coating a first metal salt solution on the first surface and a second metal salt solution on the second surface; irradiating the first surface and the second surface by using a laser beam, so that lignin and cellulose in the wooden substrate are cracked and restructured to form graphene, the first metal salt immersed in the first surface is decomposed to form first metal oxide nanoparticles, and the second metal salt immersed in the second surface is decomposed to form second metal oxide nanoparticles, so that a first sensitive layer and a second sensitive layer are obtained; and coating a conductive material on the wooden substrate and on the two sides of the first sensitive layer and the second sensitive layer respectively, so that a connecting electrode which is in contact with the first sensitive layer and the second sensitive layer respectively is formed, and a single-core double-module graphene-based gas sensor is obtained.

Provided are a superatomic material, as well as a sol, a preparation method therefor, and application thereof. The superatomic material comprises a carrier and superatoms doped in the carrier, the superatoms being one or more of silver, copper, zinc superatoms and rare earth element superatoms, the scale of superatoms being 100-3000 pm, and the carrier being an inorganic carrier. The superatomic material and the sol have superior antimicrobial and antiviral properties, have a long service life, and are environmentally friendly.

This disclosure provides an α-alkene extractant comprising an alcoholamine, a saturated monoketone having a carbon chain length of 7-10, and a monovalent salt of a Group IB metal, wherein the mass ratio of the alcoholamine, the saturated monoketone having a carbon chain length of 7-10, and the monovalent salt of the Group IB metal is (0.9-2.0):(0.8-1.5):(0.1-0.6), and a method for separating alkanes and α-alkenes. This disclosure utilizes the principle of complexation extractive rectification technology, and by adding a complexation extractant, a relatively stable complex is formed between the metal and the alkene, achieving the goal of separation from the alkane, with good separation efficiency and high product yield.

The present invention provides an easy and scalable process for producing a compound of formula (I): N(2y / z)[Mx(GO3)y](I), wherein [Mx(GO3)y] is an anion, wherein Mx is an Atomic Quantum Cluster (AQC) consisting of x number of zero valent metal atoms; wherein G is Si or Ti; and y is an integer selected from 1, 2, 3, 4, 5 and 6; and wherein the compound of formula (I) has no net charge. In addition, the present invention is directed to a composition comprising the compound of formula (I), a process for producing the compound of formula (I); the uses of the compound of formula (I) and the compound of formula (I) for use as a medicament, its second medical uses, a pharmaceutical composition, kit-of-parts and an apoptotic agent comprising said compound of formula (I).

Particular embodiments may provide an anode material, comprising a compound of formula Li2—X—Y, wherein: X and Y are each independently a metal atom or a metalloid atom; the anode material has a discharge potential of less than about 0.4 V vs. Li / Li+; and the molar ratio of Li:X:Y is 2:1:1.

The present invention patent application relates to a dressing (1) pertaining to the technical field of medical-use materials; said dressing (1) comprises a textile material body (2) and a medicinally functional element (3) incorporated into the textile material body (2), consisting of copper and / or gold (AuNPs) and / or zinc and / or zinc oxide and / or titanium dioxide and / or silver nanoparticles.

A method to synthesize a silver nanohybrid material. The method includes mixing a nitrate solution with a citrate solution to form silver nanoparticles (AgNPs). The method further includes esterifying a first mixture including octadecanoic acid, octadec-9-enoic acid, and octadeca-9,12-dienoic acid with caffeic acid in the presence of an acid catalyst and a solvent to form an unsaturated carboxylic acid mixture including first, second, and third acrylic acid derivatives. The method includes reacting the unsaturated carboxylic acid mixture with ethylene glycol to form a second mixture including first, second, and third ester derivatives. The method further includes mixing the AgNPs with the second mixture to form a third mixture. The method includes evaporating water from the third mixture to form the silver nanohybrid material. The silver nanohybrid material includes a AgNP core covered with the first, second, and third ester derivatives bonded to the AgNP core.

The present invention discloses a composite sulfide solid electrolyte material, a preparation method and an application, which relate to the technical field of energy materials. By mixing a precursor material and a quantum dot material and then performing hot pressing and sintering treatment, a composite sulfide solid electrolyte material is obtained. The quantum dot material is a metal compound quantum dot or a carbon quantum dot with semiconductor properties. The mass ratio of the precursor material to the quantum dot material is 100:(1-10). The introduction of the quantum dot with semiconductor properties significantly improves the ion conductivity and interface stability of the material and other properties. The prepared electrolyte material has excellent interface compatibility, ionic conductivity, electrochemical stability, etc., and is suitable for application in all-solid-state soft-pack lithium metal batteries, effectively improving the cycle stability of the battery, enabling the battery to maintain a high capacity during long-term use, and extending the service life of the battery.

Oxidized metal complexes are formed using methods which adjust the pH of solutions to obtain oxidized metal complexes having particular physicochemical properties. A method for preparing an oxidized metal complex includes providing a first solution comprising a highly oxidized metal and having a pH between 0 to 7; providing a second solution comprising one or more ligands or a ligand precursor and having a pH between 7 to 13 or greater; and combining the first solution and the second solution to form a third solution comprising the first oxidized metal complex. A method for preparing an oxidized metal complex includes providing a species solution comprising a first oxidized metal complex and having a pH of at least pH 11; and adjusting the pH of the species solution to form a second oxidized metal complex. Compositions and methods for preparing and using same are provided.