50 results about "Ion selective membrane" patented technology

The invention discloses a non-selective membrane mixing system for solar seawater desalination and all-weather salinity difference energy collection. The non-selective membrane mixing system comprises a chamber for accommodating seawater; the salinity gradient energy power generation module is arranged at the bottom of the chamber and comprises a cation electrode and an anion electrode which are connected through an external circuit, and the cation electrode and the anion electrode are immersed in the seawater in the chamber; the salinity gradient energy generation module comprises an evaporator and a condensation cover, the evaporator floats in the seawater in the cavity, and the condensation cover is located at the top of the cavity; wherein no ion selective membrane is arranged between the cation electrode and the anion electrode. According to the system, photo-thermal evaporation fresh water production and salinity gradient energy power generation / energy storage processes are coupled, and membrane-free all-weather salinity gradient energy collection is realized.

A lithium metal electrode has no more than five ppm of non-metallic elements by mass, and is bonded to a conductive substrate. Optionally, the lithium metal electrode may be bonded on one side to a conductive substrate and on another side to a lithium ion selective membrane. The lithium metal electrode may be integrated into lithium metal batteries. The inventive lithium metal electrode may be manufactured by a process involving electrolysis of lithium ions from an aqueous lithium salt solution through an ion selective membrane, carried out under a blanketing atmosphere having no more than 10 ppm of non-metallic elements, the electrolysis being performed at a constant current between about 10 mA / cm2 and about 50 mA / cm2, and wherein the constant current is applied for a time between about 1 minute and about 60 minutes.

A purpose is to provide an analytical device capable of maintaining good measurement sensitivity even after long-term storage and obtaining a proper potential for selected ions. Provided is an analytical device comprising: a porous substrate; an electrode formed in an inside of, on a surface of, or from the inside to the surface of the porous substrate; an ion selective membrane covering the electrode; and a protective layer, wherein the ion selective membrane comprises a plasticizer; and the protective layer is formed in the inside of the porous substrate as close to at least a portion of the ion selective membrane and comprises a component inhibiting penetration of the plasticizer.

The invention provides an ion selective membrane, a preparation method thereof and a method for synchronously recovering resources and energy in neutralization reaction. The ion selective membrane takes a two-dimensional nano material as a main body skeleton, one-dimensional nano materials are doped in the main body skeleton, and the one-dimensional nano materials and the one-dimensional nano materials as well as the one-dimensional nano materials and the two-dimensional nano materials are cross-linked through a cross-linking agent; the two-dimensional nano material is MXene, graphene oxide, molybdenum disulfide, vermiculite, a two-dimensional metal organic framework material or a two-dimensional covalent organic framework material; the one-dimensional nano material is sodium carboxymethyl cellulose, sodium hydroxy propyl cellulose or aramid nano fiber. The ion selective membrane enables H < + > to selectively pass through and coexisting ions such as Na < + > and the like not to pass through, so that the ion selective membrane can be used for power generation in an acid-base neutralization reaction, chemical energy is converted into electric energy, water and a salt solution are respectively obtained in an acid chamber and an alkali chamber, and resources and energy are synchronously recycled.

Disclosed herein are anolytes comprising alkanolamine-base ligands and an iron-ion component. Also disclosed herein is a redox flow battery system comprising an anolyte comprising the alkanolamine-based ligand of the present disclosure, a catholyte; and an ion selective membrane disposed between the catholyte and anolyte. Also disclosed herein are methods of making and using the anolyte disclosed herein.

The invention provides a sewage long-term online ammonia nitrogen monitoring sensor based on electrochemical equilibrium, the sensor comprises a conductive substrate, a reference electrode, a working electrode and a counter electrode are sequentially arranged on the conductive substrate, and an expansion area arranged at the rear end of the working electrode is used as a contact area. And a POT-MWCNTs solid contact layer, an ammonium ion selective membrane layer and a zwitterionic copolymer coating are sequentially arranged above the contact area. The sensor disclosed by the invention is quick, stable and efficient in response and high in continuity, and long-term online ammonia nitrogen monitoring of sewage can be realized.

The utility model provides an ion selective electrode structure, which comprises a shell, a plurality of holes are arranged at one end of the shell, the outer surface of one end of the shell is communicated with the inner surface of one end of the shell through the plurality of holes, and the diameter of each hole is 0.1 mm-0. 8mm; and the ion-selective membrane is cured and formed at one end, provided with the multiple holes, of the shell, and the ion-selective membrane covers and is embedded into the multiple holes so as to be exposed to the outer side of the ion-selective electrode structure through the holes. According to the utility model, liquid leakage can be reliably prevented, and the sealing effect is better.

The application discloses a kind of plasma electron sponge nanochannel composite membranes and preparation method and application thereof, the composite membrane includes a layer of self-assembled arrangement plasma electron sponge film and a layer of membrane material with large pore structure, part of the pore in the self-assembled arrangement plasma electron sponge film and part of the large pore in the membrane material with large pore structure are communicated correspondingly, and electron sponge refers to polyoxometalates (POMs). The application first uses plasma electron sponge nanomaterial as functional material to make nanochannel composite membrane, and plasma electron sponge has excellent and stable performance, mild preparation condition, simple operation and green environmental protection. In addition, the plasma electron sponge nanochannel composite membrane prepared by the application can be used as ion selective membrane in salinity gradient energy conversion, and has the advantages of excellent and stable performance, high conversion power and green environmental protection.

This application discloses a method for recycling wastewater from the hydrometallurgical process of laterite nickel ore, comprising the following steps: high-pressure acid leaching of laterite nickel ore is subjected to circulating leaching, CCD washing, iron and aluminum removal, and MHP precipitation treatment, followed by filtration to obtain a post-MHP precipitation liquid; alkali is added to this liquid to remove manganese, and filtration is performed to obtain post-MHP precipitation and manganese removal wastewater; the post-MHP precipitation and manganese removal wastewater is subjected to ion exchange to recover nickel and cobalt, yielding an ion-exchange liquid and a enriched nickel-cobalt solution, which is reused in the CCD washing process; the ion-exchange liquid is treated by extraction or ion-selective membrane treatment to obtain a magnesium-rich solution and a magnesium-poor solution; part of the magnesium-rich solution is reused in the MHP precipitation process, and the remaining portion is evaporated and crystallized to obtain magnesium sulfate; the magnesium-poor solution is subjected to bipolar membrane electrolysis, and the resulting sodium hydroxide solution is reused in the iron and aluminum removal and MHP precipitation processes, while the sulfuric acid solution is reused in the high-pressure acid leaching process. This application improves the recycling rate of wastewater from the hydrometallurgical process of laterite nickel ore, and the recovered intermediate products can be further purified or directly reused in previous processes.

The invention discloses a laterite-nickel ore hydrometallurgy wastewater cyclic utilization method which comprises the following steps: taking a laterite-nickel ore high-pressure acid leaching solution, carrying out cyclic leaching, CCD (Charge Coupled Device) washing, removing iron and aluminum, carrying out MHP (Methyl Hydroxypropyl Phosphate) precipitation treatment, and filtering to obtain a solution after MHP precipitation; adding alkali into the post-solution to remove manganese, and filtering to obtain MHP-precipitated manganese-removed wastewater; carrying out ion exchange on the MHP-precipitated manganese-removed wastewater to recover nickel and cobalt, so as to obtain an ion-exchanged solution and an enriched nickel-cobalt solution, and reusing the enriched nickel-cobalt solution to a CCD (Charge Coupled Device) washing process; performing extraction or ion selective membrane treatment on the solution after ion exchange to obtain a magnesium-rich solution and a magnesium-poor solution; part of the magnesium-rich liquid is reused in the MHP precipitation process, and the rest part is subjected to evaporative crystallization to obtain magnesium sulfate; and the magnesium-poor solution is electrolyzed by a bipolar membrane, the obtained sodium hydroxide solution is reused for the processes of removing iron and aluminum and precipitating MHP, and the sulfuric acid solution is reused for the high-pressure acid leaching process. According to the method, the recycling rate of the laterite-nickel ore hydrometallurgy wastewater is increased, and the recycled intermediate product can be further purified or directly reused in an early-stage process.

The utility model discloses a combined type ion sensor which comprises a main body, an anti-bending sheath is installed at the upper position in the main body, a cable is arranged at the inner position of the anti-bending sheath, a reference electrode hole and a temperature hole are formed in the upper end position of an electrode support, and the temperature hole is communicated with the reference electrode hole. A reference electrode A is mounted in the reference electrode hole in an inserted manner, and an ion electrode A is mounted on the inner side of the electrode bracket. The device adopts a new structural design, the ion electrode, the reference electrode and the temperature sensor are integrated in one structure, so that the size of the sensor is effectively reduced; the core of the ion electrode is an ion selective membrane which can be directly screwed on a butt joint thread of the ion electrode through a thread, the reference electrode adopts a glass structure with the diameter of six millimeters and is directly fixed in a reference electrode hole through soft silica gel, and the temperature sensor adopts a metal structure with the diameter of three millimeters and is fixed in a temperature hole through soft silica gel.

The application provides a sensor with antioxidant and antifouling properties and a preparation method and application thereof, and belongs to the technical field of marine chemistry. The sensor takes a glassy carbon electrode (GC) as a substrate, adopts polyaniline as a solid contact layer, and takes a calcium ion selective membrane (ISM) as a detection core. The innovation of the sensor is that a fucoidan-based functional polypeptide (PFp) is modified on the ISM to construct an antifouling layer. The PFp layer forms a triple synergistic defense mechanism of "anti-adhesion-sterilization-antioxidation". Experiments prove that the sensor can effectively inhibit the adhesion and colonization of bacteria such as escherichia coli and staphylococcus aureus and chlorella, and significantly slow down the oxidative decay of the sensing membrane. In addition, when the sensor is used for calcium ion detection in actual seawater, it exhibits excellent long-term stability and high precision, and provides an innovative strategy for continuous in-situ monitoring in complex media.

The application discloses a kind of full solid-state calcium ion selective electrode based on high hydrophobic copper sulfide and its preparation method and application.It includes the transduction layer coated on the surface of electrode, the preparation of the material of transduction layer includes: copper source, CTAB is dissolved into anhydrous ethanol, then sulfur powder is added, and the mixture is uniformly dispersed by ultrasonic;The material of transduction layer is obtained by carrying out solvothermal reaction to the mixed solution and post-treatment to the reaction precipitate.The application adopts one-step solvothermal method to control CuS by adding different amounts of CTAB surface hydrophobicity, prepares different nano-structure CuS-CTAB as transduction layer modification to glassy carbon electrode surface, and constructs calcium ion selective membrane on its surface to build calcium ion selective electrode with CuS-CTAB as transduction layer.CuS-CTAB has large specific capacitance and excellent hydrophobicity, and as transduction layer, it can accelerate the ion-electron conduction rate, inhibit the formation of interface water layer, and improve the stability of electrode potential.

The invention provides a preparation method of a porous polylactic acid cation selective membrane, which comprises the following steps: blending polylactic acid and 1-hexyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imine salt in dichloromethane, stirring under an oil bath condition of 40 DEG C to obtain a PLA solution, and forming a PLA liquid membrane on a glass plate by adopting a tape casting method; and at normal temperature, soaking the glass plate on which the PLA liquid film is formed in absolute ethyl alcohol for 2 days, drying, and stripping to obtain the porous polylactic acid cation selective film. The invention also provides an application of the porous polylactic acid cation selective membrane. The porous polylactic acid cation selective membrane is used for salinity gradient energy power generation. The porous polylactic acid cation selective membrane is a three-dimensional porous structure cation selective membrane based on a polymer material, has high conductivity and low internal resistance, and can realize high-power-density salinity gradient energy conversion.

The invention relates to a polymer (lithium ion carrier) with a structure as shown in a formula I. Compared with a commercial lithium ion carrier, the lithium ion carrier disclosed by the invention has better whole blood detection accuracy, better lithium ion selectivity and anti-interference effect and better thermal stability on the premise of not influencing a linear relation. The lithium ion selective membrane electrode prepared from the lithium ion carrier or the lithium ion sensor has excellent accuracy in detection of lithium ion concentration in blood, aqueous solution or seawater samples. Formula I

This invention discloses a solid perchlorate ion-selective electrode, its preparation, and its application, belonging to the field of ion-selective electrode technology. The solid perchlorate ion-selective electrode of this invention includes a shell, within which are disposed a first conductor, a conductive liquid, a conductive substrate, a solid contact layer, and an ion-selective membrane connected in sequence. The ion-selective membrane contains an ion carrier, an ion exchanger, a plasticizer, and a membrane matrix. The solid contact layer contains a carbon material and an ionic liquid. The ion carrier includes a m-tetraphenylporphyrin metal complex, wherein the coordinating metal is iron, cobalt, or nickel. The main application of this invention is to improve the perchlorate ion-selective electrode composition of ClO4. ‑ High selectivity and interference resistance in detection.

The application discloses an ammonium ion sensor and a preparation method thereof, wherein the ammonium ion sensor comprises a substrate, a reference electrode and a working electrode which are arranged on the substrate in a spaced manner; the working electrode comprises a metal electrode layer, a dendritic gold nanomaterial layer, a conductive polymer layer and an ammonium ion selective membrane which are arranged in a stacked manner; the metal electrode layer is arranged in close contact with the substrate; the conductive polymer layer is arranged in close contact with one side of the dendritic gold nanomaterial layer and wraps around the surface of the dendritic gold according to the shape of the dendritic gold. In the application, the conductive polymer layer is conformal with the dendritic gold in the dendritic gold nanomaterial layer, which is beneficial to electron transmission, reduces potential drift, makes the ammonium ion sensor have good performance, has a low detection lower limit and a wide sensing range, realizes sensitive, stable and real-time noninvasive monitoring of different ammonium ion concentrations in various body fluids, does not produce toxic substances during ammonium ion detection and can realize continuous detection of ammonium ions in body fluids.

The application discloses a kind of amphiphilic molecule modified graphene-based ion selective membrane and its preparation method and application.The application is sequentially poured into alkaline graphene oxide aqueous solution with the cationic surfactant aqueous solution containing N(CH3)2 + And the aqueous solution containing-COO ‑ Of polymer, after being mixed uniformly, membrane is extracted into film, the film is dried and annealed, and the amphiphilic molecule modified graphene-based ion selective membrane is obtained.In the application, due to the electrostatic interaction between the N(CH3)2 + Region of the polar head of dioctadecyldimethylammonium bromide and-COO ‑ Of sodium polyacrylate, the ion selective membrane shows good ion selective performance.The ion selective membrane exhibits stable power generation performance by the synergistic effect of dioctadecyldimethylammonium bromide, sodium polyacrylate and graphene oxide.

Methods and systems of PFAS destruction including recovery and recycling of reactants. The method may include combining water including PFAS with fresh reactants including photosensitizer, sulfite salt and base to form an initial treatment solution having a pH of about 10 or more, irradiating the initial treatment solution with UV light in a photoreactor to destroy a portion of the PFAS and form treatment effluent, passing the treatment effluent through an ion selective membrane, combining the reject solution with water including PFAS to form a subsequent treatment solution, irradiating the subsequent treatment solution with UV light in the photoreactor to destroy a portion of the PFAS and form a treatment effluent, and repeating the process to recycle the recovered reactants one or more additional times. After the recovered reactants are recycled multiple times, they may be purged.

The present application relates to microelectrode, specifically to a method for batch production of potential type full solid-state ion selective microelectrode and application. A bundle of treated carbon fibers is used to in-situ synthesize nanowire-like transduction layer by chemical water bath method, and then the grown carbon fibers are assembled into ion selective microelectrode and adsorbed ion selective membrane, that is, the full solid-state ion selective microelectrode is constructed in batch. The full solid-state ion selective microelectrode constructed by the method has the advantages of simple production, high sensitivity, low cost and easy miniaturization, and can realize the detection of plant root ion flux. By changing the type of ion carrier in the ion selective membrane and the plant root, the detection of various ion fluxes of various plants can be realized.

The application discloses application of a molecular imprinting nanochannel membrane in selective identification of dimethoate molecules, and the molecular imprinting nanochannel membrane is obtained by first synthesizing a molecular imprinting polymer with a dimethoate molecular imprinting cavity, and then uniformly loading the molecular imprinting polymer on an AAO base by using a super assembly technology. The application constructs a nanofluid device including two half electroconductive cells by taking the molecular imprinting nanochannel membrane as an ion selective membrane, realizes identification and detection of dimethoate by testing I-V variation after adding a to-be-tested solution in an electrolyte solution, and has considerable application prospect in the field of intelligent ion transmission due to simple operation and high sensitivity.

The invention provides a self-circulation type resin flowing electrode deionizing device for dispersed water quality purification, and relates to the field of water treatment, the self-circulation type resin flowing electrode deionizing device is characterized in that an anode part of a raw water treatment area accommodates an anode flowing electrode, a cathode part accommodates a cathode flowing electrode, and a raw water circulation part is located between the anode part and the cathode part; the ion exchange membrane is used for conveying raw water and carrying out selective ion exchange on the raw water through the ion-selective membrane and the flowing electrode; the regeneration area is used for performing in-situ regeneration on the flowing electrode adsorbing the target ions; the circulation driving unit is connected with the raw water treatment area and the regeneration area and is used for driving the flowing electrode to circularly flow between the raw water treatment area and the regeneration area; the power supply unit is connected with the anode part and the cathode part and used for providing a driving electric field and driving ion directional migration; the anode flow electrode includes a magnetic anion exchange resin slurry and the cathode flow electrode includes a magnetic cation exchange resin slurry. According to the present invention, the efficient and sustainable distributed water treatment can be achieved according to the rural or dispersed water treatment requirements.

The application belongs to the field of selective membranes, and particularly relates to a carbon nanofiber polymer cation selective membrane, a preparation method and application. The carbon nanofiber polymer cation selective membrane has a dense three-dimensional porous structure and a high surface charge density. In the application of reverse electrodialysis salt gradient energy conversion, the carbon nanofiber polymer cation selective membrane has excellent ion flux and ion selectivity. The carbon nanofiber polymer cation selective membrane can be applied to a salt gradient power generation system, and high-performance salt gradient energy conversion can be obtained under different salt gradient and different pH value electrolyte solution environments.

The invention belongs to the technical field of hydrogel-based ion selective membranes, and particularly discloses a cation selective permeable hydrogel membrane as well as a preparation method and application thereof. A plurality of pore channels penetrating from top to bottom are distributed in a hydrogel film, the pore channels are tightly arranged, and any two adjacent pore channels share the same side wall to form a three-dimensional honeycomb structure; the inner surfaces of the pore channels are loaded with uniform and dense negative charge organic groups, and the pore channels are filled with water. The preparation method of the hydrogel film comprises the following steps: preparing a precursor solution, carrying out primary light-induced curing on the precursor solution to generate a hydrogel film semi-finished product, standing in situ to fully swell the hydrogel film semi-finished product, and carrying out secondary light-induced curing on the swelled hydrogel film semi-finished product. The invention provides a novel structure hydrogel film with high surface charge density and a long-range ordered vertical pore channel honeycomb structure, and the hydrogel film has excellent cation selectivity, rapid ion transmission capability and stable mechanical properties, and has wide application prospects.

The invention relates to the technical field of fluorine-containing wastewater treatment, and particularly discloses a method for recovering a high-purity fluoride product from high-concentration fluorine-containing wastewater, an extraction method comprises raw material pretreatment, ion transfer enrichment and chemical precipitation, an ion transfer enrichment device comprises a positive electrode tank, a negative electrode tank, an intermediate tank, a first ionic membrane plate and a second ionic membrane plate, the energy consumption is low, and the whole process is operated at normal temperature; meanwhile, the material cost is low, the lithium ion selective membrane can be repeatedly used, expensive adsorbents or organic solvents are not needed, meanwhile, pollutant-free emission is achieved, organic solvents are not needed, pretreatment precipitates can be recycled, and large-scale popularization and application are facilitated.

The application discloses a migration reinforced ion rectification system and application thereof in preparation of battery-grade lithium hydroxide from salt lake brine, wherein the membrane unit of the system is composed of multiple cation-selective membranes and anion exchange membranes which are stacked according to the principle of'same kind and same side', filled with ion-selective separation resin, and provided with flow channel separators and sealing gaskets. When the migration reinforced ion rectification system is used in preparation of battery-grade lithium hydroxide from salt lake brine, lithium ions and magnesium ions are selectively screened by multiple cation-selective membranes and multiple ion-selective separation resins, and after n-stage selective separation, the selectivity coefficient between lithium ions and magnesium ions is amplified by n stages, lithium ions and hydroxyl ions generated by hydrolysis in the product chamber of the n-stage product chamber generate lithium hydroxide product, and high-efficiency preparation of lithium hydroxide is realized in a single electrodialysis membrane assembly.

The present application relates to the technical field of all-solid-state ion selective electrode, in particular to a kind of all-solid-state ion selective electrode instrument-free standard potential calibration method, more specifically to use short-circuit electrode short-circuit all-solid-state ion selective electrode, to adjust or unify the standard electrode potential of all-solid-state ion selective electrode, maintain the original Nernst slope calibration curve of all-solid-state ion selective electrode, and the position of calibration curve can be controlled by changing the concentration of short-circuit electrode electrolyte;Wherein, the short-circuit electrode includes any one of Ag / AgCl / 3MKCl reference electrode and Ag / AgCl QRE quasi-reference electrode;The all-solid-state ion selective electrode includes electrode base, solid connection layer modified on the surface of electrode base and ion selective membrane layer modified on the surface of solid connection layer.The present application uses short-circuit electrode short-circuit all-solid-state ion selective electrode, which provides the possibility for all-solid-state ion selective electrode instrument-free standard potential calibration, greatly simplifies the calibration and unification of all-solid-state ion selective electrode.

The present invention relates to ion selective membranes and the preparation thereof, such as magnesium ion selective membranes and the preparation thereof. In particular, the invention describes improved polymer blends for use in ion selective membranes. The invention furthermore relates to electrodes and potentiometric sensors comprising such membranes and the use thereof for determining ion concentrations in samples.

An ion conducting polymer comprising a modified poly(phenylene oxide) is described. In an exemplary modified polymer, a portion of the monomeric units are attached to a sulfonate-substituted arylamino moiety, such as a monovalent derivative of phenoxy aniline trisulfonate (BOATS), to form a monomeric unit with a charged side chain. Ion conducting polymers can also be prepared with polyether-containing side chains. The ion conducting polymer can be used to prepare ion exchange membranes which can be used in a variety of applications, such as in non-aqueous redox flow batteries and related energy storage systems.

The application relates to the field of membrane separation technology and discloses a preparation method of a high-lithium-ion-selectivity open-chain crown ether composite membrane. The method takes a polysulfone (PSF) membrane as a base film, adds an imine monomer in water, adds an acyl chloride monomer and an o-phenylenedioxydiacetyl chloride (OPDC) monomer in oil, introduces the OPDC monomer into a separation layer through an interfacial polymerization method, and prepares the open-chain crown ether composite membrane with high lithium ion selectivity. The open-chain crown ether composite membrane prepared through the method has excellent lithium ion separation performance and stability, and provides a reference idea for the preparation of ion selective membranes, efficient recovery and extraction of liquid phase lithium resources and other related fields.