894 results about "Silver chloride" patented technology

Systems and methods of use for continuous analyte measurement of a host's vascular system are provided. In some embodiments, a continuous glucose measurement system includes an electrochemical sensor incorporating a silver/silver chloride reference electrode, wherein a capacity of the reference electrode is controlled.

A device, which is preferably disc shaped, has two primary layers. A first layer has one side, which is the lower side in use, for adhering to a patient's skin surface, a second, upper layer on the underside of which electrical circuitry is printed or affixed so that the electrical circuitry is sandwiched between the layers. The device can be made in several sizes to accommodate patient size and location of the acupuncture point to be stimulated. Two distinct forms of the device are presented: a single use and a reusable device for. In the single use device, the first, lower layer is preferably a foam with non-conductive adhesive on both sides: the bottom side for adhering to the skin and the top side for adhering to the upper polyester disc. The holes through this lower foam layer include, preferably, eight holes spaced concentrically about one central hole in the middle of the lower foam layer. All these holes are, preferably, overfilled with an electrically conductive gel that projects from the lower foam layer. The conductive circuitry preferably printed on the underside of the upper layer provides a series connection to the gel in each of the eight concentric holes and a separate connection to the gel in the center hole when the upper layer is adhered to the lower layer. The printed circuitry may be a silver/silver chloride polymer film, also provides for a tab(s) which can be permanently or temporarily affixed to an integral or remote simulator through direct contact or wire leads. In the reusable device a pressure-sensitive adhesive material forms the lower layer which allows for multiple applications to a patient's skin. The adhesive lower layer is transparent to show the circular central electrode the annular electrode. The electrodes are preferably silver/silver chloride polymer film. In either configuration, metal core insulated leads can be use for electrical connection with the opposite ends of the leads connected to jacks for connection to an impulse stimulator or can end in electrically conductive tabs.

The invention provides a load-type monoatomic catalyst. The catalyst is formed by uniformly loading monodispersed metal atoms on the surface of a nano substrate material. A preparation method thereofcomprises the following steps: in an electrolyte solution containing metal salt, performing electrochemical deposition by using a three-electrode system, using a glassy carbon electrode loaded with the nano substrate material as a working electrode, using a graphite rod as a counter electrode, using a silver/silver chloride electrode as a reference electrode, performing linear volt-ampere scanning, enabling the metal atoms to be monodispersely and uniformly deposited on the nano substrate material, to obtain the load-type monoatomic catalyst. The load-type monoatomic catalyst is capable of, based on electro-deposition, constructing a monoatomic structure, through an electro-deposition method, rapidly, efficiently, and controllably depositing single atoms, and realizing deposition of positive and negative electrodes, and the obtained load-type monoatomic catalyst has important significance to a general application in the catalytic and particle physical field.

The invention provides a bacteria cellulose membrane containing silver chloride nanometer particles, corresponding preparation method and application, which is characterized in that a plurality of silver chloride nanometer particles are adhered to the microfiber surface of the three-dimensional porous reticular structure of the bacteria cellulose membrane, the content of the silver chloride nanometer particle is 0.5 to 21% of the total weight and which particle diameter is 10 to 300nm. The preparation method is base on the principle of using the particular three-dimensional reticular microfibrillar structure and the high oxygen density (ether linkage and hydroxy) to constitute the synthetical effective nanometer reactors by the silver chloride nanometer particles in situ and the product is obtained after repeatedly soaking in the solution of silver salt and chloride salt, rinsing and drying. The bacteria cellulose membrane containing silver chloride nanometer particles has the advantages of excellent antibacterial performance, most simple preparation process, can be used as favorable antiseptic dressing and extracting the silver chloride nanometer particles.

The invention discloses a preparation method of a silver-loaded mesoporous silicon dioxide antibacterial agent. The preparation method disclosed by the invention comprises the following steps: dissolving a template agent, a silicon source and silver nitrate in water to obtain a silver sol solution, adding a chloride aqueous solution into the silver sol solution, stirring and mixing to form silicon dioxide/silver chloride gel, drying gel, and carrying out thermal treatment to obtain the mesoporous silicon dioxide antibacterial agent containing elemental silver. The prepared silver-loaded mesoporous silicon dioxide antibacterial agent is 200-1000 cm<2>/g in specific surface area, 5-30 nm in aperture and 1.0-5.0 cm<3>/g in pore volume; the mass percentage of elemental silver is 10-30%. The antibacterial agent prepared by the preparation method disclosed by the invention keeps the ordered porous structure, the uniform aperture, the larger specific surface area and the pore volume of the carrier material; the antibacterial agent prepared by the preparation method disclosed by the invention has the characteristics of being easy for controlling the content of antibacterial active bodies, simple in preparation method, broad-spectrum in antibacterial property, durable in antibacterial efficiency, steady in antibacterial property, nontoxic to human body and the like and can be widely applied in the fields of ceramics, plastics, textiles, coatings, water treatment and the like.

A hydrometallurgical process for the treatment of complex silver-bearing sulfide ores and concentrates that recovers substantially all silver, lead, antimony, zinc, copper and sulfur, along with the chemical reagents utilized during the process. Finely ground ores and concentrates are leached under heat and pressure with water, sulfuric acid, nitric acid, oxygen, and a catalyst, and are further treated to recover silver in the form of silver chloride; iron in the form of iron hydroxide; copper and all traces of soluble toxic metals as sulfides; zinc as zinc ammonium sulfate and specifically nitric acid, sulfuric acid, oxygen, ammonia, and ammonium compounds as valuable fertilizer products.

The invention discloses a method for integrating focusing and detection of cells and a miniaturized system thereof. The miniaturized system comprises a microfluidic chip, a data acquisition card, a miniature computer and a sample injection device, wherein the microfluidic chip is formed by a flow channel layer, a substrate layer and a PCB (Printed Circuit Board) which are aligned and packaged in sequence; the flow channel layer is provided with an asymmetric sinusoidal flow channel, a detection main flow channel, polyelectrolyte gel and a conductive-fluid storage pool; the polyelectrolyte gel, the conductive-fluid storage pool and a silver-silver chloride wire form a detection electrode; the silver-silver chloride wire is connected with the data acquisition card and the miniature computer by a transimpedance amplifier and a differential amplifier so as to form a differential impedance detection circuit of the cells; the miniature computer is used for realizing generation of pseudorandom excitation signals, processing of system response signals and analysis and display of multi-performance parameters of the cells. The method and the miniaturized system disclosed by the invention integrate the functions of focusing and detection of the cells, realizes miniaturization and portability of the system and can be widely used for biological study of blood cells and rare cells.

The present invention provides a nanometer silver/silver chloride visible light optical catalyzing material which consists of nanometer silver and silver chloride with a chemical formula of Ag/AgCl. The nanometer silver particles are loaded on the surface of the silver chloride and occupy 18 to 36 percent of the gross weight. The preparation method includes the following steps: (1) adopting a solid phase sintering method to synthesize silver molybdate, and obtain a mixture of molybdena and silver oxide, tabletting and then sintering; the sintered matter is the silver molybdate; (2) mixing the two according to a proportion of 1g of the silver molybdate and 20ml of concentrated hydrochloric acid and then putting into a high pressure kettle, heating to 150 to 220 DEG C and depositing for 48 to 72 hours; flushing the obtained deposit with a pH value of 7 to obtain the silver bromide; (3) mixing the silver chloride prepared by step (2) with the water solution of silver nitrate, stirring and adding glutamic acid, refluxing under a water bath of 70 DEG C, thus obtaining a nanometer silver/ silver chloride optical catalyst. The present invention effectively restrains silver chloride from decomposing by utilizing the plasma effect of the nanometer silver particles and can utilize the energy of solar light more effectively.

The invention provides a cellulose/silver chloride composite material and a preparation method thereof. The cellulose/silver chloride composite material is quickly prepared by adopting microcrystalline cellulose, sliver salt and chlorine compound as the materials, adopting water as solvent and adopting an ultrasonic-wave treatment method. The cellulose/silver chloride composite material prepared by the preparation method disclosed by the invention is uniform in silver/ silver chloride nanometer particle, capable of being uniformly distributed on a cellulose substrate and is extensive in application prospect in the antibacterial filed and the photocatalysis filed. Moreover, according to the preparation method disclosed by the invention, the materials are cheap, the process is simple, the operation is convenient, the preparation is quick and the process conditions are easy to control, so that the production process is greatly simplified, the time is saved and the cost is reduced. Meanwhile, the preparation method is free of any expensive and complex equipment and is beneficial to the industrial popularization.

The invention discloses a comprehensive recycling process for polymetallic material containing gold and silver, belongs to the field of non-ferrous metal comprehensive recovery, and mainly comprises the following steps: ball-milling polymetallic material containing gold and silver, leaching bismuth, copper and tin from the polymetallic material by sulfuric acid leaching agent and ferric chloride, recovering the bismuth, copper and tin; retaining lead, gold and silver in the first leaching residue; and recovering the lead, gold and silver. According to the comprehensive recycling process provided by the invention, bismuth, copper and tin are leached from the polymetallic material by sulfuric acid leaching agent and ferric chloride, the oxidation of the ferric in the ferric chloride, and the chloride solution function of the chloride ion to bismuth and tin are creatively utilized, the addition of sulfuric acid and ferric chloride has the effect of changing silver oxide and silver sulfide into silver chloride, so as to reduce the chlorination step cost, and further reduce the dosage of sodium chlorate and hydrochloric acid, and the leaching rate of gold and silver is greatly improved accordingly. The comprehensive recycling process provided by the invention has the advantages that the technology is simple and practicable, the process is short, the device is simple, and the operation is convenient; and the adopted raw material is common, cheap and pollution free.

The invention discloses a preparation method for a metal organic framework-derived tricobalt tetroxide-modified titanium dioxide nanotube array. The method comprises the following steps: firstly performing pretreatment on a titanium sheet substrate material; performing electrochemical treatment on the treated titanium substrate material by using an ethylene glycol solution containing ammonium fluoride and water as an electrolyte, and performing calcination by using a muffle furnace to change a titanium dioxide crystal form; secondly, performing cobalt hydroxide electrodeposition by means of athree-electrode electrochemical workstation and by using cobalt nitrate hexahydrate as an electrolyte, a titanium dioxide nanotube array as a working electrode, a platinum sheet as a negative electrode and silver/silver chloride as a reference electrode; performing hydrothermal treatment on the titanium dioxide nanotube array to form ZIF-67 in situ; and finally, performing secondary calcination byusing a muffle furnace to obtain the ZIF-67-derived porous tricobalt tetroxide-modified titanium dioxide nanotube array. The method disclosed by the invention can effectively improve absorption capacity of TiO2 on visible light, promote separation of electron hole pairs, and improve photocatalytic degradation efficiency of organic pollutants.

An electrically conductive fiber and a coupled biomedical sensor are described. An electrically conductive core of the fiber includes a multiplicity of synthetic conductive filaments and an outer nonconductive fiber layer. The sensor area of the electrically conductive fiber is coated by thin film of silver ink and thin film of silver-silver chloride ink. The electrically conductive fiber's porous surface contacts the thin silver ink coating and the silver coating contacts the silver-chloride ink coating. A surface of the biomedical sensor is coated by a thick film of ionically conductive media, containing an electrolyte, in contact with the silver-chloride coating. The electrolyte diffuses into a porous structure of electrically conductive yarn.

A process for preparing a combined miniature electrode used for cell measurement features that the capillary glass tubes are used to load the micron-class Ag wire, Pt wire and carbon fibre in a fine metallic tube by insulating enclosure. The capillary glass tube for carbon fibre or Pt wire is enclosed by fused paraffin wax. The capillary glass tube contains the saturated potassium chloride solution of silver chloride to become an enclosed reference electrode.

The invention discloses a three-electrode integrated electrochemical sensor based on a microelectrode array. The sensor comprises the bismuth film modified microelectrode array (gold working electrode), a silver/silver chloride electrode (reference electrode) and a platinum electrode (counter electrode). The three electrodes are prepared through a standard MEMS technology, and multiple discs at equal intervals are evenly distributed on the gold electrode to serve as the microelectrode array. In the electrochemical detection process, heavy metal gathering and dissolving-out reacting occur on the microelectrode array, and the surface of the microelectrode array is modified with a bismuth film in order to increase the detection type of heavy metal and expand the detection range of the heavy metal. The surface of the silver electrode is electroplated with silver chloride to form the Ag/AgCl reference electrode. The platinum electrode serves as the counter electrode and forms an access with the working electrode. Difference pulse stripping voltammetry is utilized for determining the concentration of the heavy metal, and a result shows that the sensor is high in detection sensitivity, low in detection limit and high in signal-to-noise ratio; the sensor is easy and convenient to operate, needs a small quantity of samples, can be used for rapidly detection heavy metal on site and is capable of efficiently monitoring environmental pollution in real time.

The invention relates to a method for preparing a metallic submicron microsphere array film and an electric deposition device. The method comprises the following steps of: vertically self-assembling polystyrene microspheres to obtain an ordered microsphere array film grown on conductive glass, synthesizing a silicon dioxide macroporous nano net by using the ordered microsphere array film as an initial template and adopting a sol-gel method, and obtaining the metallic submicron microsphere array film attached to the conductive glass by using the nano net as a second-step template and adopting an electrochemical deposition method. The electric deposition device comprises a glass tube filled with electroplating liquid; a tube orifice is sealed by using a plug containing platinum opposite electrodes and a silver/silver chloride reference electrode on the upper part of the glass tube; and the lower part of the glass tube is connected with an inverse opal film attached to the surface of the conductive glass through an O-shaped gasket and fixed on the inverse opal film. The method solves the problem of difficulty in preparing the high-ordered metallic microsphere array film, and lays a foundation for researching three-dimensional photonic band gap performance of a metallic microsphere array, particularly silver spheres with special optical property.

The inorganic antiseptic consists of zinc oxide with semiconductor characteristic and Ag ion, where the Ag ion is in the mass fraction of 0.1-10 %, and the zinc oxide is one or several kinds of four-needle zinc oxide whisker, nanometer zinc oxide and common zinc oxide powder. The Ag ion is provided by one or several kinds of silver nitrate, silver carbonate, silver sulfate, silver chloride and sliver oxide, and is carried in the lattice of zinc oxide by means of high temperature solid solution technology. The inorganic antiseptic of the present invention has wide antiseptic spectrum, high efficiency, lasting antiseptic effect and high safety, and is suitable for food packing, building material, medical equipment, fabric, sanitary article and other fields.

The invention discloses a method for preparing high pure gold and enriching silver, platinum and palladium from silver anode mud. The process of separating silver with nitric acid, recycling silver, platinum and palladium with silver-enriched liquid, decomposing silver separating slag with aqua regia and preparing high pure gold with a one-time unsaturation reduction method is adopted and comprises the steps: leaching the silver anode mud with nitric acid to obtain separated silver, adding sodium chloride into the silver separating liquid to deposit the silver to obtain silver chloride sediment and silver depositing liquid, adding iron powder into the silver chloride sediment for replacement, returning the crude silver back to a Kaldo furnace for melting, and adding sodium hydrogen sulfite into the silver depositing liquid to reduce, deposit and recycle platinum and palladium; performing gold separating on the silver separating slag with aqua regia to obtain gold separating liquid and gold separating slag, performing the iron powder replacement step on the gold separating slag, adding the sodium hydrogen sulfite into the gold separating liquid to perform unsaturation reduction to obtain gold powder and gold depositing liquid, washing, drying and ingotting the gold powder to obtain a product gold ingot, and adding the sodium hydrogen sulfite into the gold depositing liquid to reduce and recycle the platinum and palladium for the second time to obtain the crude gold powder, and returning back to the previous steps. The method solves the problems of long leaching flow, high agent cost, complex operation, more devices and low recycle rate of the silver anode mud.

Anti-microbial lyocell fibres incorporate an anti-microbial composition which comprises a silver compound deposited on a support material in the form of porous particles having an extended surface area and comprising an oxidic material which is essentially insoluble in water and incapable of forming hydrates. A preferred composition is silver chloride on titanium dioxide particles. The anti-microbial effect is durable to processing and the fibres are not adversely discoloured. Low concentrations of the anti-microbial composition of below 0.1 percent by weight on weight of cellulose may be used. In the process of making the fibres, the anti-microbial composition preferably is added to the pasty pre-mix of the spinning solution.

A process for preparing antibiotic ABS product includes bal-grinding inorganic antibiotic powder containing nanosilicon dioxide and silver chloride as well as cladded by titanium dioxide with polymethyl methyl acrylate for obtaining inorganic antibiotic composite micropowder, adding prepared composite micropowder into ABS resin for producing antibiotic high polymer product through mixing and processing.

The invention relates to a method for preparing high-purity silver from silver-containing waste liquid. The method comprises the following steps of: adding a silver participating agent into the silver-containing waste liquid, and filtering and washing to obtain silver slime with high sliver content; adding acid and surfactant into the obtained silver slime for oxidation; adding sodium chloride solution into the obtained filtrate to participate the silver again; filtering and washing to obtain high-purity silver chloride solid; dissolving the silver chloride solid in any one of aqueous solution of ammonia and solution of ammonium carbonate; adding any one of hydrazine hydrate, ascorbic acid, and glucose into the obtained silver-containing solution for reduction; filtering and washing to obtain high-purity silver powder; and drying the pure silver powder and casting ingot to obtain a high-purity silver ingot. Equipment is simple, the method is easy to operate, investment is small, production cost is low, silver yield is high, a product has high quality, and the method can be easily industrially implemented.