79 results about "Divalent metal ions" patented technology

The invention discloses a multi-network anti-freezing hydrogel electrolyte, a preparation method thereof and application of the multi-network anti-freezing hydrogel electrolyte in an electrochemical device. The hydrogel is prepared by using polyvinyl alcohol (PVA) and polyacrylamide (PAM) to form a basic network skeleton, introducing phytic acid, ethylene glycol and lithium / zinc bimetal salt (Li2SO4 / ZnSO4), and carrying out thermal initiation polymerization and freeze thawing. The hydrogel prepared by the invention has a multiple physical cross-linked network formed by polymer molecular chain entanglement, hydrogen-bond interaction among functional groups and metal coordinate bonds constructed between phosphate groups and divalent metal ions, so that the hydrogel electrolyte has excellent mechanical properties. Due to introduction of ethylene glycol, formation of ice crystals is effectively inhibited, and the hydrogel is endowed with excellent anti-freezing performance; the high-concentration Li < + > and Zn < 2 + > ensure the high ionic conductivity. The supercapacitor assembled by using the hydrogel electrolyte shows relatively high specific capacitance and good capacitance retention rate under bending and freezing conditions, and has good electrochemical properties and safety performance.

The application provides a reverse water gas shift catalyst, a preparation method and application thereof, and the reverse water gas shift catalyst prepared by the preparation method has excellent catalytic activity and high CO selectivity in a reverse water gas shift reaction. The preparation method comprises the following steps: contacting a precipitating salt solution with a precipitant aqueous solution and performing co-precipitation, and simultaneously controlling the reaction temperature to be 40-80 DEG C and the pH to be 6-8; optionally performing aging after the co-precipitation is completed; filtering the obtained precipitate to obtain a filter cake, washing the filter cake, then drying the filter cake, and calcining the filter cake at 300-500 DEG C to obtain the reverse water gas shift catalyst; wherein the precipitating salt solution is a mixed aqueous solution of a soluble salt of divalent metal ions and a soluble salt of trivalent metal ions, the divalent metal ions are selected from divalent ions of Mg and / or Zn, and the trivalent metal ions are selected from trivalent ions of Al, In and / or Ga.

The invention discloses an ion locking fixed cyclodextrin cross-linked polymer functionalized cellulose-based textile material and a preparation method thereof, and the method comprises the following steps: cross-linking hydroxypropyl-beta-cyclodextrin (HP-beta-CD) by using 1, 2, 3, 4-butanetetracarboxylic acid (BTCA) to prepare a cross-linked polymer containing carboxyl / carboxylate groups, and carrying out cross-linking on the cross-linked polymer containing carboxyl / carboxylate groups to prepare the ion locking fixed cyclodextrin cross-linked polymer functionalized cellulose-based textile material. Polyphenols active molecules (such as luteolin) are clathrated and / or loaded; depositing the cross-linked polymer loaded with the active molecules on the surface of a cellulose-based textile base material which is subjected to cationization modification and has quaternary ammonium salt cationic groups on the surface through electrostatic interaction; divalent metal ions (preferably Ca < 2 + >) are further introduced to coordinate with carboxyl / carboxylate groups in the cross-linked polymer to form physical cross-linking points, so that locking and fixation of a functional layer are realized, and the release behavior of active molecules is regulated and controlled. The material has the comprehensive performance of stable fixation, washability, durability, breathability, comfort and maintenance and controllable release mode, and can be applied to application scenes such as skin contact textiles and dressing materials.

The invention discloses a naphthoquinone-based gas sensitive material, a preparation method and application of the naphthoquinone-based gas sensitive material in an ammonia gas sensor, and belongs to the technical field of gas sensors. The material is composed of divalent metal ions such as copper, nickel and cobalt and a polysubstituted naphthoquinone organic ligand, forms a one-dimensional chain structure, has a high specific surface area, an ordered electron channel and excellent molecular recognition capability, and can detect toxic gases such as ammonia gas at room temperature with high sensitivity. Macroscopic preparation of the material can be realized through solvothermal one-step reaction. Compared with the prior art, the one-dimensional coordination structure and ligand site engineering synergistically improve the carrier transport and molecular recognition capability, can realize continuous, real-time and selective detection of ammonia gas under complex working conditions, and has the advantages of high yield, large-scale preparation and excellent device application prospect.

The invention discloses enhanced shampoo powder based on plant-derived antibacterial factors, which comprises the following components in parts by weight: A, 10-40 parts of plant polysaccharide; b, 5-30 parts of vegetable protein; c, 4-15 parts of natural alkaline ester; d, 2 to 10 parts of natural polyol; e, 1-7 parts of plant organic acid; f, 2 to 20 parts of a plant antibacterial active component; g, 3-6 parts of a food-grade anti-caking agent; h, 1 to 10 parts of divalent metal ions; i, 0.5-2 parts of food coloring; plant polysaccharide and plant protein are matched to form a net-shaped embedding structure, and plant antibacterial active components are uniformly embedded into a multi-layer steady-state structure; buffer substances of natural alkaline lipid, polybasic sugar alcohol and plant organic acid are matched to synergistically form a thermal steady state barrier on the periphery of the net-shaped embedding structure, so that the high-temperature stability of active factors in plant antibacterial active ingredients and the controllable slow release of the storage period are promoted; the technical problem that the plant antibacterial active ingredients are subjected to thermal oncolysis, hydrogenation inactivation or molecular configuration isomerization in the links of mixing granulation and subsequent drying is solved.

This invention discloses a method and system for selective separation of monovalent and divalent ions in an alginate fiber coagulation bath based on electrodialysis, belonging to the field of fiber production and membrane separation technology. The method and system integrate a selective electrodialysis device into a traditional coagulation bath circulation system. Utilizing an ion exchange membrane with monovalent and divalent cation selectivity, sodium ions accumulated in the coagulation bath are selectively migrated and removed under the action of an electric field, while divalent metal ions are efficiently retained, thereby maintaining a stable molar ratio of divalent ions to sodium ions in the coagulation bath within the required process range. Compared to traditional methods, this invention eliminates the need for large-scale replenishment of divalent metal salts or full replacement solution, significantly reducing production costs and resource waste. It achieves online regeneration and continuous circulation of the coagulation bath, significantly improving production stability, fiber quality, and resource utilization efficiency, and is suitable for the green and efficient production of various alginate fibers.

The invention discloses a multifunctional double-drug delivery system based on metal collaborative treatment and application of the multifunctional double-drug delivery system, and belongs to the technical field of biological medicine. The double-drug delivery system is double-drug delivery lipidosome and comprises metal ions, a lipidosome membrane and active ingredients, the metal ions are adsorbed on the surface of the lipidosome membrane, and the active ingredients are wrapped in the lipidosome membrane; the metal ions are divalent metal ions; the active component consists of an STING agonist and a traditional Chinese medicine active monomer component. According to the double-drug delivery system, the STING agonist and the traditional Chinese medicine anti-inflammatory components are co-loaded through lipidosome, and multi-dimensional remodeling of a tumor microenvironment is achieved through the double effects of exciting tumor immunity and inhibiting inflammatory reaction; and meanwhile, by introducing metal ions, the lysosome escape efficiency of a liposome drug delivery system is effectively enhanced, so that the intracellular delivery efficiency of the drug is improved.

The invention discloses a polyphosphate-metal nano-composite as well as a preparation method and application thereof, and belongs to the technical field of biological medicines and nano-materials. The polyphosphate-metal nano-composite is formed by self-assembly of polyphosphate and metal ions under the coordination action; wherein the chain length of the polyphosphate is 20 to 75. According to the invention, divalent metal ions are introduced, so that polyphosphate and metal ions form a spherical nano-composite through coordination self-assembly, the composite can be absorbed by tumor cells and degraded under an acidic condition, released polyphosphoric acid is separated through unique Ca < 2 + > phase, Ca < 2 + > is enriched around mitochondria, and the function of tumor treatment is realized. And tumor cell metabolism reprogramming is caused to be dominated by oxidative phosphorylation, so that copper death and immunoregulation are induced, and a triple synergistic anti-tumor effect is realized.

The present application relates to the technical field of binder, and particularly relates to a water-based binder based on coordination cross-linking of polyvalent metal ions and a preparation method and application thereof.A preparation method of a water-based binder based on coordination cross-linking of polyvalent metal ions, specifically comprising the following steps: S1, dissolving carboxymethyl cellulose sodium in water, heating and stirring to form a carboxymethyl cellulose sodium aqueous solution; S2, dissolving a metal ion compound in deionized water to obtain a metal ion compound aqueous solution; the metal ion includes divalent metal ions and trivalent metal ions; S3, slowly adding the metal ion compound aqueous solution to the carboxymethyl cellulose sodium aqueous solution in a certain amount, continuously heating and stirring for a period of time, and obtaining the water-based binder.The mechanical property of the water-based binder is obviously improved, and the battery has better rate and more stable cycle.

An electrolyte composition including an aluminum salt, an ionic liquid, and a phthalocyanine coordination compound is provided. The anion of the aluminum salt is F−, Cl−, Br−, I−, BF4−, PF6−, [(CF3SO2)2N]−, CF3SO3−, NO3−, CH3CO2−, SO42−, C2O42−, or [B(C2O4)2]−. The ionic liquid has a structure as shown in formula (I) in the specification. The phthalocyanine coordination compound contains a divalent metal ion. In the electrolyte composition, the weight of the aluminum salt is greater than that of the ionic liquid, and the weight of the ionic liquid is greater than that of the phthalocyanine coordination compound. An aluminum battery containing the electrolyte composition is also provided.

The invention relates to the technical field of lithium-sulfur batteries, in particular to a preparation method of a graphene carbon nanotube hybrid material and a lithium-sulfur positive electrode material. The preparation method of the graphene carbon nanotube hybrid material provided by the invention comprises the following steps: S1, mixing a graphene oxide solution and a divalent metal salt solution to obtain a mixed solution; s2, mixing a carbon source, a nitrogen source and a precipitator, adding the mixed solution obtained in the step S1 into the mixture, and performing hydrothermal reaction and solid-liquid separation to obtain an intermediate; and S3, carrying out carbonization, washing and solid-liquid separation on the intermediate to obtain the graphene carbon nanotube hybrid material. By utilizing the characteristic that the surface of the graphene oxide has abundant and uniformly distributed polar functional groups, divalent metal ions can be uniformly adsorbed, so that in-situ grown carbon nanotubes in a hydrothermal reaction are more uniformly distributed, a sulfur storage space is increased, a rapid example and electron transmission channel is created, and electrochemical reaction kinetics is increased.

The application discloses a kind of biomimetic mineralization materials with high stable protection DNA and preparation method thereof.DNA molecule is self-assembled with divalent metal ion, and DNA / metal nanoparticle is obtained; polyelectrolyte layer is wrapped on the surface of DNA / metal nanoparticle by layer-by-layer assembly technology, and DNA / metal@LBL nanoparticle is obtained; polydopamine layer is deposited on the surface of DNA / metal@LBL nanoparticle, and DNA / Fe@LBL@PDA particle is obtained, which is biomimetic mineralization material with high stable protection DNA.The biomimetic mineralization material has the advantages of simple construction, high density and long-term stability, and can effectively protect the stability and integrity of DNA molecule in harsh external storage environment (such as ROS, high temperature, high salt, alkaline, humid, biological solvent and nuclease environment).The present application can provide technical support for DNA high-density storage and long-term stability storage, and has wide application value in the fields of biological medicine, genetic engineering, disease treatment and DNA storage.

The invention relates to the field of hair growth nutrients, and discloses a nutrient composition for promoting hair growth and a preparation method thereof, the composition comprises a basic hair growth nutrient group and an absorption-promoting synergistic group; the basic hair growth nutrition group comprises the following components in parts by weight: 0.3-0.8 part of ferrous lactate, 2-5 parts of zinc gluconate, 5-8 parts of magnesium stearate, 3-8 parts of a coating material and 17-25 parts of milk mineral salt; the absorption-promoting synergistic group comprises the following components in parts by weight: 0.2-1.5 parts of a black pepper extract, 2-10 parts of lecithin and 2-8 parts of casein phosphopeptides, the black pepper extract and the lecithin are firstly released, an intestinal epithelium channel is opened by utilizing a biological penetration promoting effect, and a pre-permeation state is established; the subsequently released CPP is complexed with divalent metal ions in intestinal juice to prevent precipitation, so that the CPP is synchronously and rapidly absorbed through a pre-opened channel, and the problems of competitive antagonism and difficult absorption of high-dose minerals are effectively solved.

The invention discloses a recovery method of 7-dehydrocholesterol, which comprises the following steps: pretreating a 7-dehydrocholesterol crystallization mother liquor serving as a raw material to obtain a crystallization mother liquor dry basis; dissolving the crystallization mother liquor dry basis by adopting an organic solvent, and filtering to obtain filtrate; adding a complexing agent into the filtrate, and filtering after complexing reaction to obtain a complex; the complexing agent is metal salt of divalent metal ions, and the metal salt can be dissolved in water; adding water into the complex for decomplexing, extracting and crystallizing; according to the recovery method, the 7-dehydrocholesterol (7-DHC) in the 7-dehydrocholesterol crystallization mother liquor can be effectively extracted, a 7-dehydrocholesterol product with the purity being 95% or above is obtained, and the yield is high. Meanwhile, the operation method is simple, easy to repeat and beneficial to industrialization.

The present application relates to a kind of methods for adsorbing and separating propylene and propane, which includes the adsorption separation of propylene and propane with metal organic framework, wherein the metal organic framework material is formed by the coordination assembly of divalent metal ion, malic acid and pillar supporting ligand.The metal organic framework material involved in the present application is stable in structure and performance, has high adsorption capacity for propylene, can realize the efficient thermodynamic-kinetic synergistic separation of propylene and propane, and the adsorption performance remains the original effect after repeated adsorption-regeneration multiple times.The performance in the adsorption separation of propylene and propane is far superior to most solid adsorbents.

The application discloses a membrane capacitive deionization anode and a preparation method thereof and a membrane capacitive deionization system, relates to the technical field of wastewater treatment and resource utilization, and discloses a membrane capacitive deionization anode preparation method, which comprises the following steps: providing oxidized carbon, wherein the surface of the oxidized carbon contains carboxyl groups; dispersing the oxidized carbon in water, adding nitrate, a first metal salt containing divalent metal ions and a second metal salt containing trivalent metal ions for pre-adsorption; adjusting the pH value and performing crystallization to make the divalent metal ions and the trivalent metal ions form a layered double hydroxide (LDH), so as to obtain an LDH / oxidized carbon composite anode material; and preparing a slurry of the LDH / oxidized carbon composite anode material and loading the slurry on a current collector to obtain the membrane capacitive deionization anode. The embodiment of the application prepares a membrane capacitive deionization anode with high capacity, low energy consumption and excellent ion selectivity, and can efficiently recover phosphates from wastewater.

The invention discloses a composite solution for treating reflux esophagitis and a preparation method and application thereof, and relates to the technical field of pharmaceutical preparations, the composite solution is formed by physically mixing drug-loaded microspheres and a gastric buoyant raft matrix solution; wherein the drug-loaded microspheres are solid particles which take thiolated pectin as a carrier, are crosslinked and cured through divalent metal ions and are coated with a periplaneta americana extract; the gastric buoyant raft matrix solution comprises a hydrophilic colloid, a component capable of generating gas when encountering acid and a stabilizer. The magnesium mercapto pectin microspheres provide excellent mucous membrane adhesion, and the acting time of the medicine on the esophageal focus is prolonged; the gastric buoyant raft substrate forms a physical barrier in a gastric acid environment to inhibit regurgitation of gastric contents. Through cooperation of the two, a dual treatment mechanism of local repair and source control is realized. The preparation can remarkably prolong the in-vivo residence time and effectively promote esophageal mucosa healing, and the curative effect is better than that of a pure periplaneta americana extract preparation.

This invention discloses a bisphosphonate-nucleic acid nanoparticle, its preparation method, and its applications. The preparation method involves adding divalent metal ions to a rolling circle amplification (RoBA) reaction solution, followed by the addition of bisphosphonate, to perform a RoBA reaction to obtain the bisphosphonate-nucleic acid nanoparticles. The RoBA reaction solution contains a circular DNA template. The preparation method of this invention has the advantages of high speed, precise synthesis, and simplicity, realizing multiple reactions—RoBA, ion coordination, crystallization, and co-assembly of DNA and bisphosphonate—in the same reaction system, greatly simplifying the reaction process and improving reaction efficiency. The obtained bisphosphonate-nucleic acid nanoparticles exhibit dual-pathway therapeutic effects and excellent ribozyme stability, showing promising application prospects.

A linearized mRNA preparation system, use thereof, and a preparation method for preparing mRNA by using same. A linearization buffer system comprises: 0-150 mM Tris-Ac or phosphate, 0.5-150 mM divalent metal ions or trivalent metal ions, 0.1-0.75 U / μL restriction endonuclease, and 0-7.5 mM spermidine. The present invention provides a transcription system, which has higher translation efficiency and lower dsRNA generation compared with a conventional HEPES / Tris system, and a phosphate system can be used simultaneously with the novel All In One transcription system.

This invention provides a composite material of fluorine and nitrogen co-doped activated carbon supporting layered bimetallic hydroxides. The composite material includes an activated carbon support and layered bimetallic hydroxides loaded on the activated carbon support; the activated carbon support is doped with fluorine and nitrogen; the metal ions in the layered bimetallic hydroxides include divalent and trivalent metal ions. This invention enhances the adsorption efficiency of activated carbon by doping it with fluorine and nitrogen elements, and loads layered bimetallic hydroxides onto the activated carbon support, coupling the adsorption capacity of activated carbon with the adsorption and catalytic characteristics of the layered bimetallic hydroxides to construct an integrated "adsorption-degradation-mineralization" system, synergistically enhancing the removal process of organic pollutants.

The invention relates to the technical field of perovskite solar cells, in particular to a perovskite layer and a preparation method thereof, a perovskite solar cell and a photovoltaic module. The perovskite layer comprises a three-dimensional perovskite sub-layer and a three-dimensional-like perovskite sub-layer which are laminated along the thickness direction of the perovskite layer. The three-dimensional perovskite sub-layer comprises a three-dimensional perovskite material with a chemical general formula of ABX3, the three-dimensional perovskite-like sub-layer comprises a three-dimensional perovskite-like material with a chemical general formula of L2An-1BnX3n + 1 and a diamine compound, A is an A-site cation, the A-site cation comprises a monovalent cation, B is a B-site cation, the B-site cation comprises a divalent metal ion, X is an X-site anion, the X-site cation comprises a monovalent metal ion, and the X-site cation comprises a monovalent metal ion. X-site anions comprise halide ions, L is spacer cations, the spacer cations comprise short-chain monoamine ions with the carbon chain length of 3-5, and n is larger than or equal to 18. The diamine compound can improve the performance and stability of the perovskite layer.

The present disclosure relates to an environment-responsive polymer for high-temperature low-calcium oil reservoirs and a preparation method thereof, the environment-responsive polymer for high-temperature low-calcium oil reservoirs, by mole percentage, its components include: temperature-resistant monomer: 1.5mol%-3.5mol%, acrylamide: 80mol%-91mol%, divalent metal ion synergistic monomer: 7mol%-18mol%, and the balance is water; the present disclosure makes full use of a small amount of divalent metal ions in the oil reservoir environment, realizes thickening effect through the synergistic effect of divalent metal ions and the polymer, and significantly improves the thermal stability, viscosity increasing effect, environmental responsiveness and temperature resistance of the polymer, converts the adverse conditions into favorable conditions, improves the application performance of the polymer in the high-temperature low-calcium oil reservoir, and provides a new and efficient polymer for oil displacement for the development of high-temperature low-calcium oil reservoirs.

The invention relates to the technical field of biochemical detection, in particular to a gamma-glutamyl transferase detection kit with excellent stability, which comprises the following components: a reagent R1: 10-100 mmol / L of buffer solution, 0-100 mmol / L of substrate, 0.5-5 mM of protective agent and 0.2-1 g / L of preservative; the reagent R2 is prepared from 10 to 100 mmol / L of buffer solution, 1 to 30 mmol / L of divalent metal ion compound, 0.5 to 5 mM of protective agent, 0 to 100 mmol / L of substrate and 0.2 to 1 g / L of preservative. Particularly, a reagent R2 component is improved, namely divalent metal ions are added, so that the substrate stability is obviously improved, the thermal stability of the gamma-glutamyltransferase detection reagent or kit is enhanced, and meanwhile, excellent linear range, precision and accuracy can be kept.

The application relates to the technical field of biological medicine, and discloses a preparation method of a liposome with a pH response type membrane fusion effect and application of the liposome. The pyridium betaine-terminated lipid molecule provided by the application can be quickly and reversibly protonated in a weak acid microenvironment of a tumor, the surface charge of the liposome is changed from negative to positive, and the precise switch of the membrane fusion behavior is realized; the self-adaptive fusion liposome constructed based on the pyridium betaine-terminated lipid molecule successfully converts the non-specific toxicity risk of the traditional fusion liposome into a space-limited intelligent response, remains stable and inert in blood circulation (pH=7.4), and specifically activates the membrane fusion at a tumor site, realizes direct cytoplasmic delivery of a drug and avoids lysosome degradation; the STING nano agonist constructed by loading the nano composite of a STING pathway agonist and a divalent metal ion on the platform exhibits a strong pH-dependent anti-tumor immune activation effect in vitro and in vivo, and significantly inhibits tumor growth while the systemic toxicity is extremely low.

The application relates to a binder, a carbon coating slurry, a carbon coating current collector and a preparation method thereof, and an electrode and a battery, the preparation method of the binder comprising the following steps: mixing an alkaline divalent metal ion compound and a polymer binder in a solvent to obtain a mixed solution; and performing a cross-linking reaction on the mixed solution to prepare the binder; wherein the polymer binder contains a carboxyl group in a structural unit; and the cross-linking reaction is performed under weak acid conditions, and the pH of the weak acid conditions satisfies 5<=pH<7. The alkaline divalent metal ion compound is used for cross-linking the polymer binder with a carboxyl group in a polymer monomer, the divalent metal ion is used for end-capping the carboxyl group and simultaneously used as an intermediate linking matrix to form a reticular polymer binder, and the binder has the characteristics of low cost and high bonding performance.

This invention discloses a metal ion-driven meliosteum peptide nanoassembly, its preparation method, and its applications, relating to the field of agricultural biotechnology. The meliosteum peptide nanoassembly is formed by the self-assembly of a hexahistidine-tagged meliosteum peptide with divalent metal ions through coordination. The average particle size of the meliosteum peptide nanoassembly is 20 nm–30 nm. The meliosteum peptide nanoassembly obtained by this invention through the self-assembly of a hexahistidine-tagged meliosteum peptide with zinc ions exhibits excellent antibacterial, anti-biofilm activity, stability, and biocompatibility, and can be used to control plant bacterial diseases caused by Xanthomonas and other fungi.

A porous coordination network is represented by the following formulas (I) to (VIII), in which M2+ is a divalent metal ion, M3+ is a trivalent metal ion, L1a and L1b are tridentate ligands having hexaazaphenalenyl, L2a and L2b are bidentate or tridentate ligands containing a carboxy group, L3− is a tertiary ligand ion that is an anion of triazole or a triazole derivative, and Y is a cation.

The invention provides an NLG919 and sulconazole carrier-free self-assembled nano particle as well as a preparation method and application thereof. According to the invention, carrier-free self-assembly is realized through intermolecular interaction of NLG919 and sulconazole, and the prepared nanoparticles are used for improving the drug utilization rate and the tumor inhibition effect. The two compounds both contain polycyclic aromatic structures and aza-aromatic rings and can generate pi-pi stacking and hydrophobic association; nitrogen-containing and oxygen-containing functional groups can be used as hydrogen bond acceptors / donors to form a multipoint hydrogen bond network; the halogenated aromatic ring of the thioconazole can also provide halogen bond / pi-halogen interaction. Under the condition that metal ions are not added, the system is mainly driven by hydrophobic-pi stacking-hydrogen bond synergistically to form a nano aggregate; when divalent metal ions (such as Cu < 2 + >) are optionally added, weak coordination crosslinking can further occur, and the stability of the nanoparticles is improved.

The invention relates to the crossing field of the technical field of lithium resource extraction and the technical field of adsorption materials, in particular to a method for extracting lithium from a waste lithium battery leachate by using a phosphoric acid modified zeolite molecular sieve, which comprises the following steps: adding zeolite raw powder into a phosphoric acid aqueous solution, heating and stirring, and carrying out phosphoric acid modification reaction; transferring the phosphoric acid modified zeolite into a drying oven for evaporation drying, then carrying out calcination heat treatment in a muffle furnace, and cooling to obtain a phosphoric acid modified zeolite material; the method comprises the following steps: keeping the temperature of the waste lithium ion battery leachate at less than or equal to 25 DEG C, adding a phosphoric acid modified zeolite material, continuously stirring under a heat preservation condition, and carrying out ion exchange high-selectivity Li < + > adsorption. According to the method, the phosphoric acid modified zeolite is innovatively used for preferentially extracting lithium from the waste lithium ion battery leaching solution, selective capturing of Li < + > can be efficiently and stably achieved, and a good inhibition effect on adsorption of other divalent metal ions is achieved.

The present application relates to a kind of based on nucleic acid aptamer detection tumor cell method and kit, belong to biological detection and tumor diagnosis technical field.The present application based on nucleic acid aptamer detection tumor cell method, including the following steps: the biological sample to be tested is pretreated, and cell suspension is obtained;Fluorescently labeled tumor-related target nucleic acid aptamer is added to the folding buffer containing divalent metal ions, heated, cooled, and folded nucleic acid aptamer is obtained;The obtained cell suspension is mixed with the obtained folded nucleic acid aptamer and incubated, and washed;Using flow cytometry, the incubated cell is detected and analyzed.The present application improves the detection sensitivity of tumor cell;Realize the flow detection of multiple target points, multiple parameters;And provide the standardization kit suitable for clinical and scientific research application.