36 results about "Ion imprinted" patented technology

The invention relates to a chromium-targeted adsorbing material as well as a preparation method and application thereof. The preparation method of the targeted chromium adsorption material comprises the following steps: S1, crushing, sieving and pyrolyzing stems of potassium-rich plants to obtain biomass carbon; s2, dispersing biomass carbon in a solvent, adding Cr < 6 + > template ions, Cr < 3 + > template ions, a functional monomer, a cross-linking agent and an initiator for reaction, and washing and drying after reaction to obtain an ion imprinted polymer; and S3, dissolving a reduction barrier agent in a solvent, adding the ion imprinted polymer, and reacting at room temperature to obtain the chromium-targeted adsorption material, the potassium-rich plants are plants with the total potassium mass content of 5%-8%. The long-acting reduction adsorption material for targeted remediation of heavy metal Cr < 6 + > / Cr < 3 + > polluted soil and underground water is prepared, has extremely high specific selectivity and efficient adsorbability, and has obvious advantages in the aspects of heavy metal treatment efficiency, continuity and acid interference resistance.

The invention discloses gallium ion imprinted amidoxime-based macroporous resin as well as a preparation method and application thereof, and belongs to the technical field of functional polymer materials and separation. The method comprises the following steps: pre-assembling a gallium trichloride template and monomers such as acrylonitrile, generating monodisperse liquid drops by utilizing a microfluidic technology, polymerizing by combining ultraviolet light, eluting the template by hydrochloric acid, and performing amidoximation modification by a hydroxylamine hydrochloride alkaline solution, thereby obtaining the resin. The resin is a monodisperse spherical microsphere, has a macroporous structure, has high selective recognition capability and high adsorption capacity on gallium ions, is fast in adsorption kinetics and good in regeneration performance, and is suitable for selectively separating or enriching gallium ions from a complex solution system.

The invention provides a method for recycling and extracting rare earth elements in tailings, and belongs to the technical field of recycling and extracting rare earth elements in tailings. Predicting a three-dimensional flow field and setting liquid injection parameters by using a three-dimensional seepage grid adaptive subdivision algorithm and a permeability three-dimensional geological statistical model, and adaptively adjusting the ammonia adding amount according to a saponification state evaluation function and model prediction control; the leachate is pumped into a functionalized ion imprinted polymer adsorption column, selective adsorption is achieved through an online pH micro-control system, finally, a rare earth oxide product is obtained through gradient elution and firing, and a detection result is fed back to a model training data set; the technical problem that saponification extraction and adsorption separation procedures cannot be adaptively regulated and controlled due to the fact that the rare earth ion concentration and the impurity ion concentration of the leachate cannot be accurately predicted in real time in the leaching process is solved.

The invention relates to the technical field of electrochemical analysis, and discloses an electrochemical detection method for chloride ions in zinc electrolyte, which adopts a glassy carbon substrate-graphene-silver nanocluster-chloride ion imprinted polymer three-layer composite electrode. According to the invention, by constructing a graphene-silver nanocluster-chloride ion imprinted polymer three-layer composite electrode interface, the electrode function is reconstructed from three dimensions of ion recognition, spatial isolation and electron transfer; the problems of sensitivity attenuation and selectivity deterioration caused by synergistic interference of high-concentration Zn < 2 + > and SO4 < 2-> in a zinc electrolyte system in a traditional voltammetry method are fundamentally solved. According to the method, complex sample pretreatment is not needed, expensive instruments and equipment are not needed, in-situ, real-time and high-precision detection of the chloride ions can be achieved on an industrial site, and a key technical support is provided for intelligent control and energy efficiency optimization of a zinc electrolysis process.

The application discloses a kind of ion imprinting self-assembly high tower nitro compound fertilizer and preparation method thereof, it is related to fertilizer technical field, nitro compound fertilizer raw material is made into matrix granule;Template metal salt, functional monomer containing olefin bond, solid crosslinking agent, hydrophobic modifier and thermal initiator are uniformly mixed, and self-assembly coating powder is made;Make self-assembly coating powder adhere to the surface of matrix granule;After coating, matrix granule is transferred into drum, and under the condition of 40 DEG C~60 DEG C, 60%RH~90%RH, 5r / min~15r / min, it is ripened 4h~12h, and ripened granule is obtained;Ripened granule is screened, and is dried, and ion imprinting self-assembly high tower nitro compound fertilizer is obtained.The application is by self-assembly coating powder adhering to the surface of matrix granule, ion imprinting crosslinked polymer layer and surface hydrophobic layer are formed by wet heat ripening, metal ion slow-release function can be realized and anti-caking performance is endowed to granule.

The invention relates to the technical field of electrochemical analysis, and discloses a cobalt ion detection method based on an ion imprinted polymer modified electrode, and the method comprises the following steps: constructing a microfluidic system, and carrying out electrochemical polymerization by enabling a precursor solution to dynamically flow through the electrode to realize uniform growth of a modification layer and dynamic embedding of Co < 2 + >; then applying pulse potential to efficiently elute Co < 2 + >; and finally, performing electrochemical detection after re-combining to-be-detected Co < 2 + >. According to the scheme, imprinting sites are uniformly distributed, the template agent is rapidly and efficiently eluted, and the cobalt ion detection performance, reproducibility and preparation efficiency are remarkably improved.

The invention discloses a sweat lead ion detection sensor and a preparation method and application of an electrode of the sweat lead ion detection sensor, and relates to the field of sweat detection sensors, and the preparation method of the sensor electrode comprises the following steps: dispersing Bi-BDC MOF in an organic solvent to obtain an MOF suspension, coating a preset area of a paper-based carbon electrode with the MOF suspension, drying and curing to obtain an electrode intermediate cured with the Bi-BDC MOF; dispersing a carbon nanotube and a cysteine functionalized ion imprinted polymer in an organic solvent to obtain a polymer suspension, coating the polymer suspension on the region, where the Bi-BDC MOF is cured, of the electrode intermediate, and drying and curing again to obtain an electrode substrate; the electrode substrate is placed in a pyrrole solution for pyrrole electropolymerization reaction, and the sensor electrode is obtained after the reaction is completed. According to the sensor electrode prepared by the invention, sensitive detection of the sensor on sweat lead ions can be realized.

The invention relates to a gallium ion imprinted covalent organic framework adsorbent as well as a preparation method and application thereof, and belongs to the technical field of environmental functional materials and water pollution treatment. The preparation method comprises the following steps: taking Ga (III) as a template ion to form a template-ligand compound with pyrogallic acid, taking the template-ligand compound as a structure-directing agent, and guiding melamine to be subjected to polycondensation polymerization in the presence of formaldehyde, so as to obtain the high-molecular polymer. The invention relates to a gallium ion imprinted covalent organic framework adsorbent which is a gallium ion imprinted covalent organic framework adsorbent marked as Ga-IIP-PFCOF, and a melamine-pyrogallic acid covalent organic framework which is constructed in situ, has a regular porous structure and is rich in gallium ion specific recognition sites. Ion imprinting holes with matched spatial configuration and complementary chemical environment are formed on the framework of the gallium ion imprinting covalent organic framework adsorbent, and the gallium ion imprinting covalent organic framework adsorbent has ultrahigh adsorption capacity and excellent selectivity on gallium ions.

This invention relates to the interdisciplinary fields of environmental engineering, solid waste resource utilization, and advanced functional materials technology, specifically to a method for targeted recovery of heavy metals from municipal sewage sludge. The method discloses a method for targeted recovery of heavy metals from municipal sewage sludge. First, a magnetic nanomaterial with a hydrophilic brush layer and a surface ion-imprinted layer is prepared. Then, the sludge is acid-dissolved to obtain a leachate, and the material is added to selectively adsorb the target heavy metals. After magnetic separation, desorption is performed using a low-voltage pulsed electric field. Finally, the desorbate is purified by iron removal, and high-purity copper is recovered by constant-potential electrodeposition. This invention achieves highly selective capture and recovery of heavy metals in complex systems, and the material is recyclable, possessing good industrial application prospects.

This invention discloses a method for preparing an aqueous thermosensitive Cr(III) ion-imprinted polymer, belonging to the field of water pollution treatment technology. The method includes the following steps: (1) dissolving aminated multi-walled carbon nanotubes and potassium carbonate in N,N-dimethylformamide, and adding bromopropylene to obtain vinylated multi-walled carbon nanotubes; (2) dissolving CrCl3·6H2O, a functional monomer, and a thermosensitive monomer in a porous solvent composed of ethanol and water, adding vinylated multi-walled carbon nanotubes, ethylene glycol dimethacrylate, and azobisisobutyronitrile to obtain the Cr(III) ion-imprinted polymer. This invention introduces the thermosensitive functional monomer N-isopropylacrylamide, enabling the ion-imprinted polymer to respond to changes in ambient temperature and accurately identify and adsorb target ions in complex environments. The introduction of the thermosensitive functional monomer allows the polymer to form a hydrophilic layer, reducing non-specific adsorption caused by impurities such as humic acid, and improving the adsorption capacity and selectivity for target ions.

The application discloses a wastewater copper recovery treatment process of a PCB production line, and belongs to the field of PCB processing. 2+ The wastewater copper recovery treatment process comprises the following steps: determining the Fe 2+ content in wastewater, adding hydrogen peroxide into the wastewater with the molar ratio of hydrogen peroxide to Fe 2+ being 1:2-3, maintaining the pH at 2-2.5, reacting for 1-1.5 hours, removing the precipitate through filtration, and obtaining a first mixed solution; adding the first mixed solution into a three-stage reactor, adjusting the reaction pH of each stage of the three-stage reactor through a slow-release alkali agent, and obtaining a second mixed solution; mixing and reacting the ion imprinting polymer suspension and the second mixed solution through a microreactor; and desorption and electrolysis. The application excludes the influence of other substances on copper recovery.

The invention discloses a magnetic lead ion imprinted polymer material as well as a preparation method and application thereof, and belongs to the technical field of magnetic ion imprinted materials. According to the method, 1, 3, 5-tri (4-aminophenyl) benzene and 2, 5-divinyl-1, 4-phthalaldehyde are adopted as monomers, and the magnetic COF material with high porosity is successfully constructed on the surface of Fe3O4 (at) SiO2 (at) KH-570 through Schiff base reaction. A magnetic COF material is used as a substrate, through a surface imprinting strategy, double bonds on the surface of the magnetic COF material and vinylpyridine are subjected to an ion imprinting polymerization reaction, and the ion imprinting-magnetic covalent organic framework material (MCOF (at) IIP) is prepared. The method has the advantages of being simple and rapid to operate, mild in reaction condition and easy to control, and the prepared product is high in porosity, good in stability and high in adsorption selectivity and has wide application prospects in the aspects of adsorption removal and extraction separation of heavy metal ions.

The invention discloses a magnetic ion imprinted polymer as well as a preparation method and application thereof. The preparation method of the magnetic ion imprinted polymer comprises the following steps: 1) dispersing a functional monomer and template molecules in a solvent for pre-assembly to obtain a complex solution; 2) dispersing the oleic acid-coated modified Fe3O4 particles, a cross-linking agent and an initiator by using a solvent, and then adding into the complex solution for polymerization reaction to obtain a magnetic polymer; and 3) washing the magnetic polymer with an eluent to obtain the magnetic ion imprinted polymer. The magnetic ion imprinted polymer can specifically recognize and adsorb Sb oxygen-containing anions, is easy to separate from wastewater, is easy to regenerate, can be used for efficiently recovering and recycling antimony in antimony-containing wastewater, and is simple in preparation method, easy in raw material obtaining, low in production cost and suitable for large-scale industrial production and application.

The invention discloses a biochar material for recycling rare and precious metals from waste solar cells and a preparation method of the biochar material, and relates to the technical field of biochar materials. When the biochar material for recycling the rare and precious metals from the waste solar cells is prepared, firstly, biomass raw materials are dried, smashed, carbonized and carboxylated, and then biochar is prepared; growing a metal organic framework on the surface of the biochar in situ to prepare metal organic framework modified biochar; enabling the metal organic framework modified biochar to react with paraformaldehyde and diethyl phosphite to prepare phosphating modified biochar; reacting the phosphatized modified biochar with 3-bromopropylene to obtain modified biochar; and coating the surface of the modified biochar with an ion imprinting layer to prepare the biochar material for recycling rare and noble metals from waste solar cells. The biochar material for recycling rare and precious metals from waste solar cells prepared by the invention has the advantages of selective ion adsorption, high adsorption capacity and recyclability.

The application discloses a preparation method of Cr(III) ion imprinted material and belongs to the technical field of adsorbing material preparation. The preparation method of the Cr(III) ion imprinted material comprises the following steps: reacting chitosan and glutaraldehyde to obtain a Schiff base; adding the Schiff base and 2,4-diamino-6-methyl-1,3,5-triazine into acetic acid to react to obtain a functional monomer; then adding the functional monomer into a CrCl3 solution to react, and then adding epichlorohydrin to react at 30-70 DEG C for 4-12 hours to obtain a Cr(III) imprinted polymer; and finally eluting the Cr(III) imprinted polymer to obtain the Cr(III) ion imprinted material. The application does not need to add a substrate carrier, the functional monomer prepared by the reaction of chitosan, glutaraldehyde and 2,4-diamino-6-methyl-1,3,5-triazine can be used as the functional monomer and the solid substrate carrier at the same time in the application. In addition, the polymerization reaction system in the application is carried out in a non-toxic aqueous phase, has the advantages of being green, non-toxic and non-polluting, and the polymerization reaction can be completed without adding an initiator in the system.

The present application relates to a kind of temperature response type ion imprinted magnetic mesoporous microspheres and its application in selectively capturing uranium in high-salt wastewater;The preparation method of the present application comprises the following steps: first, magnetic mesoporous silica nanospheres are prepared, and imprinted microspheres are synthesized on the shell of magnetic mesoporous silica (Fe3O4@mSiO2) by free radical polymerization with uranium ions as template ions;The heat response structure of the adsorbent can effectively realize U (VI) desorption by changing temperature, which provides a solution to solve secondary pollutants and material damage in high-salinity uranium-containing wastewater treatment, and is expected to be widely used in high-salt wastewater and uranium extraction from seawater.

The invention discloses preparation of an ion imprinted polymer adsorbent and application of the ion imprinted polymer adsorbent in preparation of battery-grade lithium dihydrogen phosphate. The method comprises the following steps: firstly, preparing Fe3O4 coated SiO2 by taking nano Fe3O4 as a magnetic core and tetraethoxysilane, and then carrying out imprinting polymerization on lithium dihydrogen phosphate as a template and a mixed functional monomer under the action of a cross-linking agent to obtain a crude product; and finally, eluting the template to obtain the magnetic ion imprinted polymer adsorbent. The adsorbent can be used for specifically adsorbing lithium dihydrogen phosphate ions from low-concentration lithium, high-impurity brine or a lithium chloride solution, the application process of the adsorbent comprises the steps of adsorption, desorption, evaporation concentration, step-by-step cooling crystallization and drying, battery-grade lithium dihydrogen phosphate with the purity larger than or equal to 99.5% is finally obtained, and the lithium comprehensive yield reaches 90% or above. The process provided by the invention does not need to remove impurities in advance, has high selectivity, can recycle the adsorbent, has the characteristics of simple flow, low energy consumption, environmental friendliness and suitability for large-scale production, and has remarkable environmental protection and economic benefits.

The application provides an imprinted mesoporous material for adsorbing rare earth ions and a preparation method thereof. The method comprises the following steps: (1) subjecting pretreated biomass waste to hydrolysis treatment to obtain chiral nanocrystals; (2) reacting a solution containing the chiral nanocrystals in step (1), a silane coupling agent modified by a functional monomer, a silicon source and an imprinted ion source to obtain a precursor material; and then subjecting the precursor material to evaporation drying and double-template removal treatment in sequence to obtain the ion imprinted mesoporous material. The efficient independent ion imprinted mesoporous film prepared by the application meets the use requirements of high adsorption capacity and high selectivity, realizes effective utilization of biomass waste resources, and is beneficial to recycling of low-concentration rare earth ions in mineral waste residue tail liquid.

The application discloses an ion imprinted covalent organic framework material and a preparation method and application thereof, and belongs to the technical field of organic polymer porous materials. 2v The symmetrical functional monomer, the planar six-coordination metal marked ion and the solvent are ultrasonically mixed to obtain a C3 symmetrical six-site coordination complex; a solvent-dispersed C3 symmetrical node monomer is added into the C3 symmetrical six-site coordination complex system and ultrasonically mixed again, then a catalyst solution is added and ultrasonically reacted to obtain a reaction product; the reaction product is post-treated to obtain a metal covalent organic framework ion imprinted COFs precursor; the metal covalent organic framework ion imprinted COFs precursor is dispersed in a sulfuric acid solution for elution, and then post-treated to obtain the ion imprinted covalent organic framework material. The method solves the problems of difficult control of crystallinity, difficult scale synthesis and inability to construct a specific coordination environment.

The invention relates to the technical field of photoresist purification. The invention relates to polyamide resin, in particular to modified polyamide resin based on an ion imprinting technology and a preparation method and application thereof. The preparation method comprises the following steps: (1) dispersing PA66 resin in water, adding an initiator and a dispersant, vigorously oscillating, continuously adding a functional monomer to obtain a reaction solution, and carrying out closed stirring reaction; (2) after the reaction is finished, adding water into the reaction liquid, carrying out solid-liquid separation, activating the separated solid by using an activating agent, washing and drying to obtain carboxyl modified PA66 resin; and (3) adding a dispersing agent and a metal ion template solution into the carboxyl modified PA66 resin, uniformly stirring, adding excessive deionized water for quenching reaction, vigorously stirring, standing, precipitating, carrying out solid-liquid separation, soaking the separated solid by using an eluent, washing, soaking the solid by using an activating agent, washing and drying to obtain the metal ion modified PA66 resin. The prepared modified polyamide resin can effectively remove metal ions in the photoresist, and meets the current purity requirement on the photoresist.

The utility model relates to the field of high polymer material processing equipment, and discloses stirring equipment for processing imprinted polymers based on calcium ions, which comprises a supporting seat, a stirring tank is fixedly connected to the upper surface of the supporting seat, a top cover is mounted on the upper surface of the stirring tank, and a feeding pipe is arranged on the upper surface of the top cover. A discharging pipe is arranged on the lower surface of the stirring tank, a positioning assembly is arranged on the lower surface of the top cover and comprises a positioning rod, and a motor is arranged on the upper surface of the top cover. According to the utility model, through the design of the positioning assembly, the stirring blades can not only rotate circumferentially, but also move longitudinally in a reciprocating manner. When the motor drives the rotating shaft to rotate, the convex blocks slide in the spiral arc-shaped grooves to drive the stirring rods and the stirring blades to circularly stir up and down, so that the layering phenomenon of raw materials is avoided, all-directional stirring is realized, the stirring uniformity is greatly improved, and the quality stability of the calcium ion imprinted polymer is ensured.

This invention discloses a naphthalene-urea-modified magnetic nanoparticle for iron ion fluorescence detection and its preparation method. Utilizing surface ion imprinting technology, naphthalene-urea fluorescent chromophores are successfully imprinted on the surface of the magnetic nanoparticles, forming specific imprint sites that precisely match the shape and size of the template iron ions. The material preparation process is simple, and the prepared naphthalene-urea-modified magnetic nanoparticles combine the excellent nanocarrier properties of magnetic nanomaterials with the fluorescence detection advantages of naphthalene-urea fluorescent probes. The application of surface ion imprinting technology significantly enhances the selective binding ability of the naphthalene-urea chromophores to the target iron ions, enabling this probe material to exhibit good selectivity in the fluorescence detection of iron ions in water.

The invention discloses a chloride ion imprinted lanthanum nitrate modified chitosan / activated carbon (CS-La-Cl / AC) composite material and a preparation method and application thereof.The composite material is composed of CS-La-Cl and AC and has a rich gap structure, and CS-La-Cl / AC is evenly distributed in the composite material; the preparation method comprises the following steps: preparing chloride ion imprinted lanthanum nitrate modified chitosan (CS-La-Cl), heating the CS-La-Cl and AC in a constant-temperature water bath, and activating in diluted hydrochloric acid. The ion imprinting technology is the key for preparing the composite material and has higher selectivity on chloride ions, and the preparation process is simple, green and economical; meanwhile, the CS-La-Cl / AC composite material is high in capacitance and good in cycle performance, is applied to an electrode material for capacitive deionization, and can enhance the desalting performance for chloride ions and improve the capacitive deionization efficiency.

This application relates to the field of resin material preparation technology, and more particularly to an imprinted resin for gallium ion extraction, its preparation method, and its application. The preparation method includes: preparing acrylic ion exchange resin spheres; using an amination reagent to perform a conversion reaction on the acrylic ion exchange resin spheres to obtain weakly basic anion exchange resin spheres; and then reacting them with Ga(OH)4... ‑ In the case of a template ion, weakly basic anion exchange resin spheres are polymerized to obtain crude ion-imprinted resin; the crude ion-imprinted resin is then eluted to obtain ion-imprinted resin. This preparation method, through a dual design of "construction of specific recognition sites + strengthening of matrix structure," solves the problem of selective extraction of gallium ions in complex solutions and ensures the long-term stable use of the resin.

The invention discloses a magnetic imprinted polymer for separating perrhenate ions as well as a preparation method and application of the magnetic imprinted polymer, and belongs to the field of hydrometallurgy. The method comprises the following steps: firstly, preparing Fe3O4 (at) mSiO2, and then carrying out sulfydryl modification on the Fe3O4 (at) mSiO2 by utilizing 3-mercaptopropyltrimethoxysilane (MPTMS), so as to obtain the Fe3O4 (at) mSiO2 (at) S-H microspheres. Then by taking perrhenic acid radical (ReO4) as template ions, N-vinyl imidazole (NVI) as a functional monomer, N 'N-methylene bisacrylamide (MBA) as a cross-linking agent, benzoin dimethyl ether (DMPA) as a photoinitiator and a mixed solution of water and ethanol as a pore-forming agent, carrying out hydrothermal reaction to obtain a porous polymer; the perrhenate ion magnetic imprinted polymer (ReO4--MIIPs) with high selectivity and high adsorption capacity is prepared by adopting a sulfydryl-alkene click polymerization method. And the rhenium is used as an adsorbent for enriching and recovering rhenium elements in a rhenium-containing secondary resource solution, so that the separation effect and the recovery efficiency of rhenium are remarkably improved. Compared with a traditional perrhenic acid radical ion imprinting material, the magnetic ion imprinting polymer prepared by combining an ion imprinting technology with a magnetic separation technology is good in stability, high in selectivity, large in adsorption capacity, high in adsorption rate, high in desorption rate and good in regeneration performance; reO4 <-> ions in a rhenium-containing secondary resource solution can be directionally separated, extracted and recycled, and a solution is provided for efficient recovery of secondary resource valuable metals.

The invention discloses a method for adsorbing Cs < + > in cesium-containing high-temperature molten salt by using ion imprinting through a cesium-containing salt inclusion material, and belongs to the field of ion adsorption in high-temperature molten salt. The method comprises the following steps: using and serving as a frame material, using CsCl and CsF as fluxing agents, preserving heat at 800-1000 DEG C for a certain time, slowly cooling to 400-500 DEG C, and finally cooling to room temperature to obtain the cesium salt-containing inclusion material. In a KCl molten salt system, high-concentration K < + > is used for removing cesium in the cesium-containing salt inclusion material, and the potassium type ion imprinting salt inclusion material is obtained. In a CsCl high-temperature molten salt system, the potassium type ion imprinted salt inclusion material is used for adsorbing Cs < + > to obtain the cesium supported ion imprinted salt inclusion material. The ion imprinting method is used in the high-temperature molten salt system for the first time, the method has the remarkable advantages of being high in adsorption efficiency and easy and convenient to operate, and the problems of impurity introduction and secondary pollution are effectively avoided. Meanwhile, the adopted salt inclusion material is low in cost, and the method has an extremely wide application prospect in the field of dry-method post-treatment high-temperature molten salt purification.

This invention discloses a rare earth ion-imprinted microsphere and its application in ramie stalk-based ion-imprinted adsorbents, belonging to the field of adsorbent preparation; comprising the following steps: obtaining a ramie stalk nanofiber suspension from waste ramie stalks; obtaining a regenerated cellulose solution from waste cotton fabrics; obtaining rare earth ion-imprinted microspheres@ramie stalk nanofibers; immersing the rare earth ion-imprinted microspheres@ramie stalk nanofibers in Y... 3+ In the solution, the loading Y was obtained 3+ Rare earth ion-imprinted microspheres@ramie stalk nanofibers; loaded with Y 3+ Rare earth ion-imprinted microspheres@ramie stalk nanofibers, itaconic acid, and polyvinylpyrrolidone were sequentially added to a regenerated cellulose solution to obtain a casting solution. The casting solution was used to form a film, which was then frozen to obtain a liquid film. The liquid film was converted into a gel film. The gel film yielded a three-dimensional porous gel film. This three-dimensional porous gel film was then used to obtain a ramie stalk-based ion-imprinted composite gel membrane adsorbent using ion imprinting technology. The adsorbent of this application exhibits high selectivity for rare earth yttrium ions.

The invention discloses a composite reference electrode and a preparation method thereof, and relates to the technical field of reference electrodes. According to the method, firstly, a silver bar / silver mesh composite substrate is prepared through blue laser welding, so that the specific surface area is increased; then, a rare earth-nano particle doped silver halide functional layer is formed on the substrate through a melt impregnation and anodic polarization process, and the structural stability and ionic conductivity of the silver halide functional layer are enhanced. Secondly, preparing double-ion imprinted polymer powder capable of specifically capturing sulfur ions and heavy metal ions, and compounding the double-ion imprinted polymer powder with sulfonated polyether ether ketone, thiolated graphene oxide, imidazole ionic liquid and other components to prepare interface strengthening slurry; and finally, carrying out oxygen plasma treatment on an electrode, coating the slurry, and carrying out curing, heat treatment and activation to obtain a finished product electrode. The reference electrode prepared by the method has good foreign ion interference resistance.

The present application relates to the technical field of ion imprinting material preparation, and particularly relates to a copper ion imprinting polymer, a preparation method and application thereof. The copper ion imprinting polymer microspheres are obtained by using carboxymethyl chitosan and P(Ao-Co-AM) as raw materials, the prepared copper ion imprinting polymer microspheres have rich pore structures, and excellent selectivity and separation performance are exhibited for copper ions, and the microspheres can activate dissolved oxygen in water after enrichment of copper ions, catalyze degradation of antibiotics in wastewater, and have great application prospect.