214 results about "Silver chloride" patented technology

The invention provides a process for recovering various valuable elements such as lead, zinc, silver and potassium from soot of a steel mill. The process comprises the following steps of water leaching, fluorine removal, high-temperature concentration, primary cooling crystallization, secondary cooling crystallization, secondary leaching, ammonia leaching and ammonia distillation. According to the recovery process, potassium in the soot of the steel mill is recovered in the form of potassium chloride, zinc is recovered in the form of zinc sulfate, silver is recovered in the form of silver chloride, only auxiliary materials such as sulfuric acid, ammonia water and calcium chloride which are low in price are used in the whole recovery process, the cost is low, no waste water or waste residues are generated in the whole process, the direct recovery rate of lead and zinc is 95% or above, and the production cost is low. The direct recovery rate of silver is 98% or above, and the method has practical application value.

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 provides a method for synergistically recovering all elements of crystal silicon cells of a decommissioned photovoltaic module, which comprises the following steps of: collecting large-particle waste crystal silicon cells and grinding the large-particle waste crystal silicon cells to obtain powder; the powder is leached with nitric acid, and leach liquor and impurity-removed silicon powder are obtained; leaching the silicon powder subjected to impurity removal by using an HF solution to remove a silicon nitride layer, and filtering, washing and drying to obtain the silicon powder meeting the industrial standard; the leaching solution is subjected to chlorination precipitation to obtain silver chloride and a leaching solution with silver removed, and after the silver chloride is filtered, the silver chloride is subjected to acid pickling and water washing to obtain silver chloride; sodium sulfide is added into the leaching solution after silver removal, metal in the leaching solution is precipitated, and a solution containing Al < 3 + > can be obtained after filtering; the method comprises the following steps: adding an alkaline substance into a solution containing Al < 3 + >, filtering to obtain an aluminum hydroxide precipitate, and washing the aluminum hydroxide precipitate to remove foreign ions adsorbed on the surface; one technical effect of the invention is that collaborative recovery and treatment of each element in the waste crystal silicon battery piece are realized.

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 invention belongs to the technical field of X-ray detection, and particularly relates to lead-free two-dimensional double perovskite, a preparation method of the lead-free two-dimensional double perovskite and an X-ray detector manufactured based on the perovskite. The lead-free two-dimensional double perovskite is applied to X-ray detection. According to the preparation method, histamine dihydrochloride (C5H11Cl2N3Cl), silver chloride (AgCl) and bismuth trioxide (Bi2O3) are mainly used as raw materials, a mixed solution of hydrobromic acid (HBr) and hypophosphorous acid (H2PO2) is used as a solvent, a single crystal material ((C5H9N3) 2AgBiBr8 single crystal) is prepared through a hydrothermal method, and the two sides of the single crystal are coated with silver paste to serve as electrodes, so that the direct type X-ray detector is obtained. The preparation method disclosed by the invention has the characteristics of simplicity, easiness in operation, low requirement on equipment, low cost, low energy consumption and suitability for expanded production.

In the device, a plurality of low-temperature plasma reactors are fixed in an absorption liquid storage tank in an array manner, a quartz tube is immersed in liquid in the absorption liquid storage tank, and a plurality of through micropores are uniformly distributed in the bottom of the quartz tube; the lower end of the connecting fastener is fixed with the orifice of the quartz tube, and the side edge of the connecting fastener is provided with an air tube; the metal electrode is fixed through the upper end of the connecting firmware and extends into the quartz tube to serve as a high-voltage electrode; the discharge power supply is connected with the metal electrode and the ground electrode, so that the low-temperature plasma reactor generates bubble plasma in liquid; the electrolytic cell is communicated with an absorption liquid storage tank through a switch pipeline, the working electrode is provided with foamy copper as an electro-catalysis material, and the working electrode, the platinum wire counter electrode and the silver / silver chloride reference electrode form a three-electrode electrochemical structure to electrocatalytically synthesize ammonium nitrate in the electrolytic cell.

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.

The invention provides a covalent organic framework proton exchange membrane, a preparation method thereof and a high-temperature proton exchange membrane fuel cell. The preparation method comprises the following steps: dispersing 5-bromomethyl-dimethyl isophthalate and trimethylamine in alcohol to obtain a reaction solution, and performing water bath and rotary evaporation to obtain a first intermediate; dispersing the first intermediate in a hydrazine hydrate / ethanol mixed solution, reacting at 80-100 DEG C for 24-48 hours, and recrystallizing to obtain a second intermediate; dispersing the second intermediate and silver chloride in water, and carrying out inert gas reaction at 80-100 DEG C for 10 hours to obtain a quaternary ammonium type amine monomer; dissolving a quaternary ammonium type amine monomer and glacial acetic acid in water to obtain an amine monomer solution; the preparation method comprises the following steps: dissolving 1, 3, 5-benzenetricarboxaldehyde and 1, 4-dioxane in mesitylene to obtain an aldehyde monomer solution; adding the aldehyde monomer solution above the amine monomer solution to obtain an interfacial polymerization reaction system, reacting at 16-40 DEG C for 7 days, and filtering to obtain a nanosheet dispersion liquid; dropwise adding the dispersion liquid into a suction filtration container, performing vacuum suction filtration to form a membrane, and then adding a phosphoric acid solution to enable phosphoric acid molecules to enter the membrane to obtain the covalent organic framework proton exchange membrane.

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 discloses a flexible stretchable dry electrode, a preparation method thereof and bioelectricity monitoring equipment. The flexible stretchable dry electrode comprises a flexible substrate; the flexible electrode layer is arranged on at least part of the surface of the flexible substrate, and the flexible electrode layer comprises 30 parts by weight to 60 parts by weight of flaky silver powder, 5 parts by weight to 13 parts by weight of silver chloride particles and 10 parts by weight to 20 parts by weight of macromolecular resin; and one side, far away from the flexible substrate, of the flexible electrode layer is provided with a plurality of bulge structures. The flexible stretchable dry electrode is simple in structure, the preparation process of the flexible stretchable dry electrode does not need any mold assistance, the attaching capacity of the dry electrode and the skin is effectively enhanced, and noise interference is reduced. Besides, the flexibility and the stretch-proof performance of the dry electrode are effectively improved, the dry electrode can still collect and transmit bio-electricity signals under the action of a certain stretching and bending load, and therefore the dry electrode can better adapt to the deformation state of human skin.

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.

To provide a biological information measurement device capable of measuring biological information from the right ear and the left ear.SOLUTION: The biological information measurement device comprises: a first electrode for measuring biological information at a part of the right ear; a second electrode for measuring biological information at a part of the left ear; and a differential amplifier circuit for amplifying a measurement result measured from between the two electrodes of the first electrode and the second electrode. The first electrode or the second electrode is a dry electrode obtained by forming a conductive film using silver-silver chloride electrode outside the first electrode or the second electrode.SELECTED DRAWING: Figure 24

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 present invention discloses an ultra-thin photosensitive resin coating and a preparation method thereof, relating to the technical field of coating materials. First, the present invention modifies epoxy resin with 3-hydroxy-1-naphthylamine, 5-chloro-1,3,3-trimethyl-2-methylene indoline, 3-aminophthalate and silver chloride to form a photosensitive resin, enabling the coating to change with the change of light; then, ion beam assisted spinning is used to form a copper fiber film on the surface of the spectacle frame, and this is used as the cathode of the electric field. The photosensitive resin is ionized by a high-voltage electric field and deposited on the spectacle frame, and then alumina and silica films are grown layer by layer through electrostatic field assisted spraying, effectively blocking water and oxygen substances. The ultra-thin photosensitive resin coating prepared by the present invention has the effects of photosensitive color change and yellowing resistance.

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 relates to a preparation method of a membrane material, in particular to a preparation method of a hollow fiber composite membrane containing a hole structure. Aiming at the characteristics of a hollow fiber carrier, interfacial polymerization is carried out by adopting a mode that an organic phase solution passes through the inside of the carrier, chlorine salt such as lithium chloride or sodium chloride is selectively added into the organic phase solution according to the problem of chloride ion deficiency in the later period of polymerization, and on one hand, the chlorine salt can supplement chloride ions missing in the silver chloride synthesis process; on the other hand, the polyamide can be used as a phase transfer agent to promote two-phase interfacial polymerization reaction and ensure the compactness of polyamide.