169 results about "Silver chloride" patented technology

The invention belongs to the technical field of rare and precious metal recovery, and particularly relates to a method for recovering metallic silver from waste crystalline silicon battery pieces, which comprises the following steps: (1) putting the waste crystalline silicon battery pieces into an inorganic alkali aqueous solution for soaking reaction to obtain an aluminum-containing solution and dealuminized crystalline silicon pieces; (2) adding the dealuminized crystal silicon wafer into a mixed solution of organic acid and hydrogen peroxide for soaking reaction, filtering and washing to respectively obtain silver-containing filtrate and a silver-removed silicon wafer; (3) carrying out chlorination precipitation reaction on the silver-containing filtrate and a chlorine source, filtering and drying to obtain silver chloride powder; (4) adding silver chloride powder into an ammonia water solution, heating and stirring to completely dissolve silver chloride to obtain a silver-ammonia solution; (5) adding PVP (Polyvinyl Pyrrolidone) into the silver-ammonia solution, heating and stirring until the PVP is completely dissolved, adding ascorbic acid, and carrying out reduction reaction at room temperature to obtain metal silver powder precipitate; and filtering, washing and drying the precipitate to obtain the spherical silver powder. According to the method, the silver recovery efficiency is high, the spherical nanoscale silver powder can be prepared, and the purity is high.

The invention belongs to the technical field of metal surface treatment, and relates to a preparation method of a metal surface lattice passivation corrosion-resistant film, which comprises the following steps of: polishing and cleaning a metal surface, constructing a three-electrode system, and applying cathode voltage to the metal to carry out surface modification treatment so as to realize metal surface lattice reconstruction, thereby obtaining the metal surface lattice passivation corrosion-resistant film. A compact adsorption layer of corrosion inhibition molecules is formed; the three-electrode system comprises metal as a working electrode, a platinum sheet as an auxiliary electrode and silver / silver chloride or saturated calomel as a reference electrode. According to the method, metal surface lattice reconstruction is achieved through cathode voltage treatment, the technical thought of traditional anodic oxidation is subverted, the passive film forms a regular lattice structure, defects in the film are greatly reduced, permeation of a corrosion medium is effectively blocked, and the corrosion resistance of metal is remarkably improved.

The utility model discloses an anti-corrosion sensor for monitoring corrosion of an in-service FPS0 ballast tank, which comprises a sensor shell, a waterproof cable extending into an inner cavity is arranged on the sensor shell, a silver chloride electrode is arranged at the bottom of the sensor shell, one end of the silver chloride electrode extends into the inner cavity and is electrically connected with the waterproof cable in the inner cavity, and the other end of the silver chloride electrode extends downwards. A flange plate used for sealing the inner cavity is arranged at the top end of the sensor shell, a connecting hole allowing the waterproof cable to extend out is formed in the flange plate, a first connecting part used for sealing and fixing the waterproof cable is arranged on the flange plate, and a second connecting part used for sealing and fixing the silver chloride electrode is arranged at the bottom end of the sensor shell. And the surface of the sensor shell is provided with a fixed connecting device for quickly installing the sensor shell and a rib plate on the inner wall of the ballast tank. Installation can be achieved in the offshore FPSO operation period, damage to a ship body is avoided, thermal treatment is not needed, and rapid installation and replacement can be achieved.

The invention belongs to the technical field of photovoltaic module recycling, and discloses a method for efficiently extracting and recovering valuable components from waste solar cell fragments, which comprises the following steps: firstly, carrying out aluminum removal leaching by using chlorate, then carrying out silver extraction leaching by using a choline chloride / ethylene glycol / water / mixture as a silver leaching solvent, and finally, carrying out high-efficiency recycling on the valuable components. Diluting the silver leaching solution to obtain silver chloride with relatively high purity; and finally, carrying out silicon nitride removal leaching through a hydrogen fluoride solution to obtain a high-purity silicon-containing material. By the adoption of the method, the aluminum removal rate reaches up to 97% or above, the non-silver nitrate leaching solvent is adopted, the purity of obtained silver chloride is larger than 97%, the silicon material with the purity larger than 99% is finally obtained, and efficient, economical and environment-friendly comprehensive extraction and recovery of the waste solar cell fragments are achieved.

An activatable dressing of the present disclosure comprises a biocompatible battery including a magnesium-based (Mg) anode; a silver / silver chloride-based (Ag / AgCl) cathode; and a sodium chloride (NaCl) impregnated separator disposed between the anode and cathode in a dry state, the separator comprising an inlet pad configured for introduction of a water-based fluid to the separator for activation of the battery. The activatable dressing further comprises stimulation electrodes electrically coupled to the Mg anode and Ag / AgCl cathode.

The invention discloses a method for recovering valuable metals from copper anode slime step by step, and belongs to the technical field of metallurgy and chemical industry. According to the method, through control over the oxidation-reduction potential, the oxidation-reduction potential is high in the leaching stage, and it is guaranteed that gold, selenium, tellurium and the like can be oxidized to enter a leaching solution; in the reduction stage, gold, selenium and tellurium products are reduced step by step according to the difference of gold, selenium and tellurium in reduction potentials; in the leaching stage, soluble chlorine salt is added while enough oxidation potential is guaranteed, enough chloride ions are provided for the solution, and therefore gold can enter the solution in the form of AuCl4-(tetrachloroauric acid); meanwhile, in the oxidation leaching stage, a small amount of silver enters the solution in the form of silver sulfate or silver complex, and under the condition that enough chloride ions are provided, silver is precipitated and retained in residues in the form of silver chloride, so that separation of gold and silver is achieved, and meanwhile dispersion of gold and silver in the leaching process is reduced. According to the method, valuable metal is efficiently separated and recycled.

The utility model provides an electrocardio-electrode slice, including paste piece, electrocardio-electrode and PET transparent film, the electrocardio-electrode includes the gel layer, silver chloride layer and electrode button sub-button that set in proper order from close to the skin side to far away from the skin side, paste side of paste piece and silver chloride layer attach, the PET transparent film is attached to the paste side of paste piece, and the PET transparent film is attached to the paste side of paste piece. The base of the electrode button is fixed with the silver chloride layer, and the sticking piece is provided with a through hole for the electrode button to pass through; the PET transparent film is attached to the pasting side of the pasting piece and can be torn down before the electrocardiogram electrode slice is pasted on the body surface of the human body. The electrocardio-electrode slice at least comprises two electrocardio-electrodes, a plurality of electrodes are pasted at a time, attaching operation of a user is facilitated, and the user experience degree and the wearing comfort degree are improved.

The invention discloses preparation and application of a gold electrode and an electrochemical detection device. The preparation method of the modified gold electrode comprises the following steps: activating a polished and ground bare gold electrode with nitric acid, and immersing the polished and ground bare gold electrode into a deoxidized cysteamine (Cyst) solution for 2 hours; washing with double distilled water and soaking for about 12 hours, and removing physically adsorbed Cyst to obtain a Cyst modified gold electrode; immersing the Cyst modified gold electrode into a nanogold solution for 18 hours, taking out and airing to obtain a colloidal gold-Cyst modified gold electrode; and finally, immersing the colloidal gold-Cyst modified gold electrode into Cyst for 2 hours, taking out and airing to obtain the target modified gold electrode. The modified gold electrode prepared by the method, a platinum wire electrode and a silver-silver chloride electrode form a three-electrode system. The modified gold electrode in the three-electrode system has a good electrochemical catalytic oxidation function on the uric acid, the peak current and the content of the uric acid are in a linear relation, and the system can be directly used for detecting the uric acid in the urine.

The invention discloses a method for enriching valuable elements by collaborative smelting of magnesium slag and desulfurized gold concentrate, which comprises the following steps: uniformly mixing desulfurized gold concentrate, magnesium slag and solvent powder, granulating and drying to obtain mixed granules; the mixed granules are added into a reduction furnace, a reducing agent is added for reduction smelting, and slag and precious iron alloy are obtained; the method comprises the following steps: crushing the precious iron alloy, and leaching to obtain leaching residues and a leaching solution 1; acid is added into the leaching residues for gold dissolving, leaching liquid 2 is obtained, then sodium sulfite is added into the leaching liquid 2, and gold powder is obtained; adding hydrochloric acid into the leachate 1 to obtain a silver chloride solid and a leachate 3; and heating and pressurizing the leachate 3, and adjusting the pH value to obtain the hematite-form precipitate. According to the method, calcium oxide, silicon oxide and magnesium oxide in the magnesium slag serve as slag formers for reduction smelting of the desulfurized gold concentrate in the high-temperature process, iron alloy is obtained through synergistic reduction smelting, meanwhile, valuable elements such as gold, silver and copper in raw materials are captured, the gold recovery rate is increased to 98% or above under the cyanidation-free condition, the silver recovery rate is increased to 95%, and the iron recovery rate reaches 92%.

The invention relates to a silver recovery technology, in particular to a method for preparing high-purity silver powder by recovering silver from retired photovoltaic module cells, which comprises the procedures of pretreatment, leaching treatment, suction filtration treatment, silver precipitation treatment, silver chloride precipitation and purification treatment, silver ammonia solution reduction and the like. The method comprises the following steps: by taking a disassembled retired photovoltaic module battery piece as a raw material, firstly, removing dust on the surface of the battery piece and metal impurities partially attached to the surface of the battery piece through pretreatment, leaching the cleaned battery piece by using a nitric acid solution, carrying out suction filtration by using a suction filtration machine, and separating to obtain silicon slag and a silver nitrate solution; the method comprises the following steps: adding a chlorinating agent into a silver nitrate solution, reacting to generate silver chloride precipitate, dissolving the separated silver chloride precipitate by using ammonia water to form a silver-ammonia solution, and finally adding a reducing agent into the silver-ammonia solution to obtain high-purity silver powder and ammonia water; compared with the conventional technology, the method for recovering silver has the advantages of low cost, no wastewater generation and simpler process, and meets the requirements of economy, high efficiency and environmental protection.

The invention relates to a method for analyzing and testing chlorine content in a ternary precursor battery material, and belongs to the technical field of chemical analysis of ternary materials. The method comprises the following steps: distilling a sample, separating a part of solution, adding nitric acid, acetone and a silver nitrate solution, diluting with water to prepare a test solution, drawing a standard working curve, determining the content of the chlorine element and the like. The analysis and test method adopts silver chloride turbidimetric spectrophotometry for testing, has the advantages of high sensitivity, strong anti-interference capability, good selectivity, high accuracy, wide applicable concentration range, low analysis cost and simplicity, convenience and rapidness in operation, and can be used as a conventional method for analyzing and testing the chlorine content in the ternary precursor battery material. The samples suitable for the method comprise ternary precursor battery material products of NCM series, NCA series, NCM90, NCMA series and the like.

The invention provides a preparation method of a hydrophobic silver nanoparticle doped coating, which comprises the following specific steps: preparing silicon shell silver chloride nanoparticles (AgCl (at) SiO2NPs) by taking cetyltrimethylammonium chloride (CTAC), silver nitrate, sodium chloride and tetraethyl orthosilicate (TEOS) as raw materials through a one-pot method, and introducing carbon-carbon double bonds by 3-(methacryloyloxy) propyltrimethoxysilane (MPS) under an acidic condition. In the subsequent distillation-precipitation polymerization process, 4-chloromethyl styrene (VBC) is grafted with chloromethyl, and finally, perfluoropolyether methyl acrylate (PFPEMA) is introduced through atom transfer radical polymerization (ATRP) to form AgCl (at) SiO2-F NPs. Nanoparticles are added into polydimethylsiloxane (PDMS) to be evenly mixed, a silica gel catheter is used for pulling and curing to form the hydrophobic nanoparticle coating SR-F. The hydrophobic nanoparticle coating SR-F is mature in step, firm in film and good in hydrophobicity, and experimental results show that the coating has long-acting antibacterial ability.

A hydrogen storage alloy-based all-solid-state pH sensor is disclosed, comprising a counter electrode, a working electrode, a reference electrode, and a flexible substrate. The counter electrode is a platinum electrode, the working electrode is a hydrogen storage alloy electrode, the reference electrode is a silver / silver chloride electrode, and the flexible substrate is PET. Using the hydrogen-storage titanium-iron alloy electrode as the working electrode and an Ag|AgCl electrode as the reference electrode, the potential of the test solution is measured, and the pH value of the test solution is obtained through a standard curve. This invention explored the optimal ratio of titanium and iron elements through a series of experiments, enabling the sensor to simultaneously achieve both accuracy and stability. While ensuring good hydrogen ion response, optimal stability is obtained by adjusting the titanium-iron element ratio, making it suitable for long-term real-time online in vivo pH detection.

The invention relates to the technical field of oxygen free radical detection, in particular to a manufacturing process of a portable and reliable oxygen free radical detector. Comprising the following steps: mixing superoxide dismutase, potassium ferricyanide, an isothiazolinone preservative, hexammine ruthenium chloride, polyethylene glycol octylphenol ether, trehalose and bovine serum albumin, and uniformly stirring to prepare an enzyme preparation; mixing an enzyme preparation with the high polymer material solution to form reagent layer slurry with viscosity; uniformly coating the reagent layer slurry on a substrate material, and drying; printing an electrode material on the substrate material to form a working electrode and a counter electrode; the silver electrode is placed in an electrolyte containing chloride ions, potential is applied, the silver surface is subjected to a chlorination reaction, and a silver / silver chloride electrode is formed; covering the reagent layer above the electrode, tightly combining the reagent layer with the electrode in a sticking or hot pressing manner, and cutting to obtain the test paper; the prepared portable oxygen free radical detector can be used for conveniently and efficiently detecting oxygen free radicals of a human body at low cost.

The invention relates to the technical field of detection, and particularly provides a method for determining the quality and purity of silver in a silver-gold-plated product. The determination method comprises the following steps: dissolving a surface gold plating layer of a silver-plated product with aqua regia, and then dissolving a silver chloride protective film on the surface of silver with ammonia water, so that the problem that the mass of silver cannot be accurately weighed after the gold plating layer in the product is removed is solved, and the problem that the silver chloride protective film hinders the dissolution of pure silver with nitric acid to influence the determination is also solved. Thiourea is further adopted to dissolve a complex of diamine and silver, the situation that when silver is dissolved, added nitric acid reacts with the complex of diamine and silver to generate silver chloride precipitates is prevented, an ammonium nitrate solution is used for washing thiourea, a flame atomic absorption spectrometry method is adopted for conducting mass correction on silver in the solution obtained after aqua regia gold is dissolved, and the total silver mass is obtained through calculation. According to the determination method, the quality and the purity of the silver in the silver-plated product can be relatively accurately obtained.

A single-use disposable potentiometric reference sensor includes an insulating base substrate; a reference electrode disposed on the insulating base substrate, wherein the reference electrode is a silver-silver chloride electrode; an inner layer disposed on the reference electrode, wherein the inner layer is an amorphous salt layer including an amorphous polysaccharide and a salt having equally-mobility cations and anions; and a semi-permeable cover membrane disposed over the inner layer, wherein the semi-permeable cover membrane has water vapor and ion permeability.

The invention relates to a surface modified Fe / Cu-Co3O4 catalyst for nitrite detection and a preparation method thereof, a sensor and application, and the preparation method comprises the following steps: dissolving a cobalt source, an iron source, a copper source, urea and NH4F in deionized water, carrying out a hydrothermal reaction, washing, drying and calcining to obtain a Fe and Cu co-doped Co3O4 nanotube; and pre-hydrolyzing by using a KH792 silane coupling agent ethanol-water solution, and reacting with nanotubes to prepare the surface modified catalyst. The sensor takes carbon cloth or a screen-printed electrode subjected to ultrasonic cleaning and plasma treatment as a substrate, catalyst ink is coated to form a catalytic layer, and the catalytic layer, a platinum counter electrode and a silver / silver chloride reference electrode form a three-electrode system. Through molecular modification and material design, the interfacial force between the catalyst and nitrite is improved, the electrode stability is enhanced, and the catalyst is applied to a disposable printed electrode and portable detection equipment, so that high-sensitivity, stable and portable detection of nitrite is realized.

An electrode that includes: a substrate; a silver / silver chloride electrode section on at least a part of a surface of the substrate; and a film containing particles of a two-dimensional material including one layer or a plurality of layers on at least a part of a surface of the silver / silver chloride electrode section exposed to an external environment, wherein the one layer or the plurality of layers include a layer body represented by: MmXn, wherein M is one or more metals of Group 3, 4, 5, 6, and 7 and includes Ti, X is a carbon atom, a nitrogen atom, or a combination thereof, n is 1 to 4, and m is more than n but not more than 5; and a modifier or terminal T is present on a surface of the layer body.

The invention provides a screen printing sensor for underwater electric field detection, a preparation method and application, the sensor comprises an insulating substrate layer, an electrode wire arranged on the insulating substrate layer, an electrode sensing area electrically connected with the electrode wire, and an insulating layer covering the electrode wire and partially exposing the electrode sensing area, the electrode sensing areas are prepared from conductive silver paste subjected to silk-screen printing through electrochemical chlorination, and the sensor can integrate a plurality of electrode sensing areas to form a sensing array. According to the method, a silk-screen printing technology is combined with an electrochemical chlorination technology, and a silver layer part in an electrode sensing area is converted into a silver / silver chloride layer. According to the sensor, the method and the application provided by the invention, the preparation cost and the process complexity of the sensor are reduced, and the technical bottlenecks of high preparation cost and low batch consistency of the traditional rod-shaped electrode are overcome. The sensor has extremely low background noise and excellent long-term potential stability, and has wide practical application value.

The invention relates to the field of graphite felt electrodes, in particular to a graphite felt composite electrode and a preparation method and application thereof. The preparation method of the graphite felt composite electrode comprises the following steps: calcining a graphite felt in a mixed gas of ammonia gas and inert gas to obtain a nitrogen-graphite felt; performing electro-deposition in an electrolyte containing cobalt salt and stannous salt by taking the nitrogen-graphite felt as a working electrode and silver / silver chloride as a reference electrode to obtain an electro-deposited nitrogen-graphite felt; and carrying out annealing treatment on the nitrogen-graphite felt after electro-deposition to obtain the graphite felt composite electrode. The preparation method provided by the invention is low in cost, and the prepared electrode has a high degradation effect on antibiotics in wastewater.

The invention provides a reflective integrated electrochromic device. The reflective integrated electrochromic device sequentially comprises a first substrate layer, a working electrode layer, an integrated electrochromic layer, a counter electrode layer and a second substrate layer, the integrated electrochromic layer comprises a metal source compound; the metal source compound is selected from silver chloride, silver acetate, silver nitrate, silver perchlorate, silver sulfate, silver cyanide, silver sulfide, silver hexafluorophosphate, silver tetrafluoroborate, silver tetrachloroaluminate, silver trifluoromethanesulfonate, silver bis (trifluoromethane sulfonimide), copper fluoride, copper chloride, copper cyanide, copper sulfate, copper acetate, copper aluminate, cuprous fluoride, cuprous chloride, cuprous cyanide, gold chloride and gold cyanide; the catalyst is one or more of gold sulfide, gold chloride, gold (II) sulfide, nickel chloride, nickel sulfate, cobalt chloride and platinum chloride. The device has a relatively large transmittance / reflectivity dynamic change range, can perform light and heat management at the same time, and can keep a stable coloring or fading state for one month or even several months under a no-load condition.

The invention discloses a wearable molecular imprinting sensor and application thereof in cortisol detection, and belongs to the technical field of electrochemical analysis and detection. The molecular imprinting sensor sequentially comprises a sweat absorbing pad, a three-electrode system, an annular polydimethylsiloxane mold and a medical bonding patch from the skin contact surface to the outside, the front surface of the sweat-absorbent pad is in contact with the skin, and KCl and K3 [Fe (CN) 6] are adsorbed on the back surface of the sweat-absorbent pad; the three-electrode system takes an MIP / AuNWs / PET sensor as a working electrode, a platinum wire as a counter electrode and a silver / silver chloride electrode as a reference electrode; the annular polydimethylsiloxane mold and the medical adhesive patch form a sweat collection chamber. The molecular imprinting sensor based on in-situ growth of gold nanowires (AuNWs) on the porous PET film is used for rapidly detecting the cortisol level in human sweat in real time, natural receptor ligand interaction is simulated through the molecular imprinting technology, and high-specificity recognition of cortisol is achieved.

This invention discloses a waste acid recovery method based on ion exchange separation technology, belonging to the field of waste acid recovery technology. The method includes the following steps: passing a waste nitric acid solution containing aluminum and chloride ions through a cation exchange resin to adsorb aluminum ions; adding silver nitrate solution to the adsorbed waste liquid to allow silver ions to react with chloride ions to form silver chloride precipitate; filtering out the silver chloride precipitate to obtain a nitric acid solution; removing the silver chloride precipitate, using aluminum foil as a reducing agent, and adding a small amount of hydrochloric acid to reduce the silver chloride to silver powder; washing the reduced silver powder and dissolving it in nitric acid to obtain a silver nitrate solution for recycling. This waste acid recovery method based on ion exchange separation technology solves the problem of excessive total nitrogen in wastewater discharge; it also significantly reduces waste acid treatment costs and improves economic efficiency.

The application belongs to the technical field of electrode materials, and specifically discloses an electrode material based on ink direct writing 3D printing and a preparation method thereof. By controlling the rheological property of silver / silver chloride ink in ink direct writing, silver / silver chloride filaments of different sizes are printed. The silver / silver chloride ink in filament form is used to print silver / silver chloride rods or sheets with high surface area in a hollow shape. After degreasing and sintering at different temperatures, a silver / silver chloride reference electrode with high specific surface area and high mechanical strength is obtained. The reference electrode has higher specific surface area and mechanical strength, stronger impact and vibration resistance, lower polarization resistance, better long-term stability, higher polarization resistance of the electrode body with the same mass, minimum potential deviation under the same current, and minimum open circuit potential drift in natural seawater with certain temperature and salinity.

In some embodiments, a dispensable suspension composition can include a liquid carrier, silver (Ag) particles, silver chloride (AgCl) particles, and cellulose nanofibers. The dispensable suspension composition can be used to effectively fabricate electrodes via microdispensing. Such Ag / AgCl electrodes can be used as a reference electrode or an indicating electrode in electrochemical sensing systems. Accordingly, Ag / AgCl electrodes formed from the dispensable suspension and sensors using the same are provided, as well as methods of fabricating Ag / AgCl electrodes using the dispensable suspension. Other aspects including the dispensable Ag / AgCl suspension composition are disclosed.

A sterilization system for sterilizing a biofilm formed on an object, the sterilization system being provided with: a sterilization composition containing an organic compound having a standard oxidation-reduction potential (pH7) of-0.7 V to-0.2 V and water; a bactericidal composition supply unit for holding the bactericidal composition; a nozzle for supplying the bactericidal composition held by the bactericidal composition supply unit to the biofilm; an electrode provided on the nozzle so as to be in contact with the bactericidal composition; and a control unit which is connected to the electrode and which applies, to the electrode, a potential that is greater than the lower limit value of the potential window and that is-0.4 V or less based on the silver / silver chloride electrode.

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.

The invention discloses a quick-cooling type low-temperature ice bag without precooling. The quick-cooling type low-temperature ice bag is prepared from, by weight, 10-30 parts of sodium chloride, 10-30 parts of urea, 10-30 parts of potassium chloride, 5-20 parts of sodium sulfate decahydrate, 1-5 parts of borax, 0.5-3 parts of nanometer aluminum oxide, 0.1-1 part of silver chloride and 10-40 parts of ice blocks. The preparation method comprises the following steps: S1, weighing according to the proportion, and sequentially pouring the sodium chloride, the urea, the potassium chloride, the sodium sulfate decahydrate, the borax, the nano aluminum oxide and the silver chloride into a mixing stirrer; s2, stirring parameters configured by the mixing stirrer in the stirring process are as follows: the stirring rotating speed is 50-70r / min, the stirring time is 10-12min, and the environment temperature is controlled to be-5 DEG C to 35 DEG C, so that mixed powder is obtained; s3, the mixed powder is packaged with a bag, and packaged ice bag powder is obtained; and S4, adding the corresponding parts by weight of ice blocks into the packaged ice bag powder, standing for 2 minutes in an environment of 5-25 DEG C, and cooling the mixture to-23 DEG C to-25 DEG C to obtain the quick-cooling type low-temperature ice bag without precooling.

Various examples are directed to a glucose sensor comprising a working electrode to support an oxidation reaction and a reference electrode to support a redox reaction. The reference electrode may comprise silver and silver chloride. The Glucose sensor may also comprise an anti-mineralization agent positioned at the reference electrode to reduce formation of calcium carbonate at the reference electrode.

The invention discloses a recovery method of a catalyst containing platinum, silver, chromium, vanadium, molybdenum and aluminum, which comprises the following steps: uniformly mixing a waste catalyst, caustic alkali and iron powder, reacting at high temperature, cooling to obtain a melt, dissolving the melt, and filtering to obtain a first filter residue and a first filtrate; dissolving the first filter residue with nitric acid, and filtering to obtain platinum-containing waste filter residue and second filtrate; adding a sodium chloride solution into the second filtrate, and filtering to obtain silver chloride filter residues and third filtrate which contains chromic nitrate; adding a barium chloride solution into the third filtrate, reacting at room temperature, and filtering to obtain barium chromate solid filter residues and fourth filtrate; adjusting the pH value of the first filtrate to 7-8 by using an acid, reacting at room temperature, and filtering to obtain activated aluminum oxide filter residues and a fifth filtrate; adding ammonium chloride into the fifth filtrate, reacting at room temperature, and filtering to obtain ammonium vanadate filter residues and sixth filtrate; and adjusting the pH value of the sixth filtrate to be less than 1 by using sulfuric acid, reacting at room temperature, and filtering to obtain molybdic acid filter residues and a seventh filtrate.