264 results about "Prussian blue" patented technology

The invention relates to ultra-small prussian blue nano-particles (T-USPB-C) carrying tirofian, a preparation method of the nano-particles and application of the nano-particles in preparation of drugs for reducing MVO and MIRI. According to the preparation method, the T-USPB-C is prepared by three steps. The T-USPB-C provided by the invention can carry tirofiban, and has catalase and superoxide dismutase simulated nano-enzyme activity. Moreover, the size of the nano-scale drug is required to reach a nano-scale size, and the drug can be efficiently cleared through kidney excretion, so that the potential long-term toxicity problem is minimized. The ultra-small prussian blue nanoparticle carrying the tirofian has an excellent active oxygen scavenging capability. Microvascular perfusion can be rapidly improved through the antithrombotic effect, then the protection effect is continuously achieved through the anti-oxidation and anti-inflammatory mechanism, and microvascular injury and MIRI are effectively prevented.

The invention discloses a method for detecting glucose on the basis of cascade catalysis of cerium dioxide / gold nano cluster-Prussian blue nano enzyme (AuNCs-CeO-HMPB). The material is prepared by compounding cerium dioxide (CeO) with similar glucose oxidase activity and hollow Prussian blue nanoparticles (AuNCs-HMPB) modified by gold nanoclusters with similar peroxidase activity through a hydrothermal assembly method. In the presence of glucose, CeO catalyzes oxidation of glucose to generate gluconic acid and H2O2, then AuNCs-HMPB synergistically catalyzes decomposition of newly generated H2O2 to generate high active oxygen species, further a colorless 3, 3 ', 5, 5'-tetramethyl benzidine (TMB) color developing agent is oxidized to generate obvious color change, and based on the cascade catalytic reaction, the enzyme-free glucose colorimetric sensor is successfully constructed. The sensor shows excellent detection performance on glucose under optimized conditions (pH = 4.0, 50 DEG C), the linear detection range is 10.00-90.00 [mu] mol / L, and the detection limit is 2.1 [mu] mol / L (S / N = 3).

The invention provides a rubidium and cesium adsorbent and a preparation method and application thereof. The preparation method comprises the following steps: providing a doped and modified Prussian blue analogue, wherein the Prussian blue analogue comprises a Prussian blue matrix material and a transition metal doping element doped in the Prussian blue matrix material; granulating a mixed material containing the doped and modified prussian blue analogue and a granulating agent to obtain a rubidium and cesium adsorbent precursor; a mixed reaction system containing the rubidium and cesium adsorbent precursor and a surface modifier are subjected to a reaction, the surface modifier contains one or more functional structures of an amino group, a sulfonic group, a carboxyl group, a sulfydryl group, an acryloyloxy group, an epoxy group, a crown ether structure and a calixarene structure, and therefore the rubidium and cesium adsorbent is obtained. Through a multi-aspect synergistic strategy of transition metal doping, granulation and surface modification, the prepared rubidium and cesium adsorbent has good stability and high adsorption capacity, and has strong selectivity to Cs < + > / Rb < + >.

The invention discloses a spherical Prussian blue material as well as a preparation method and application thereof. The preparation method comprises the following steps: enabling a mixed reaction system containing soluble transition metal hexacyanoid salt, soluble transition metal salt, a complexing agent, soluble sodium salt, a surfactant and a carbon sphere precursor to react, and then selectively performing or not performing aging treatment to prepare the spherical Prussian blue material. According to the preparation method provided by the invention, the spherical Prussian blue material is obtained by regulating and controlling the reaction raw materials and the reaction steps, so that the rate capability and the cycle stability of the Prussian blue material are improved, and the problem that the compaction density and the compaction density are reduced due to the fact that the rate capability of a Prussian blue cube is improved due to carbon coating is solved.

The invention relates to the technical field of all-vanadium redox flow battery electrolyte additives, and discloses a Prussian-blue-like additive for a vanadium electrolyte as well as a preparation method and application of the Prussian-blue-like additive. Comprising the following steps: dissolving a first metal source, a second metal source and a structure stabilizer in an acid solution, and carrying out uniform dispersion treatment to obtain a uniform dispersion liquid I; dissolving ferrous cyanide salt and organic phosphonate in deionized water, and carrying out uniform dispersion treatment to obtain a uniform dispersion liquid II; performing continuous ultrasonic treatment on the uniform dispersion liquid II, and dropwise adding the uniform dispersion liquid I into the uniform dispersion liquid II to obtain a prussian blue-like precursor liquid; and carrying out heat treatment on the Prussian blue-like precursor solution to obtain the Prussian blue-like additive for the vanadium electrolyte. And the material can be used as an all-vanadium redox flow battery electrolyte additive to effectively improve the discharge capacity and the capacity retention ratio of the battery.

The invention relates to an iron-based Prussian blue positive electrode material and a preparation method and application thereof, the molecular formula of the iron-based Prussian blue positive electrode material is as follows: 0 < x < = 2, 0 < y < = 1, 0 < z < = 1, the iron-based Prussian blue positive electrode material is a hollow porous sphere structure formed by stacking cubic nanoparticles, the average particle size of the hollow porous sphere structure is 0.3-8 [mu] m, and the average particle size of the hollow porous sphere structure is 0.5-8 [mu] m. And the wall thickness of the hollow porous ball structure is 0.08 mu m-2 mu m. When the iron-based Prussian blue positive electrode material is used as a sodium ion battery positive electrode material, the iron-based Prussian blue positive electrode material has excellent rate capability and cycle performance.

This present disclosure relates to the technical field of lithium-ion batteries, and particularly to a composite solid electrolyte, along with its methods of preparation and application. The preparation method comprises the following steps: mixing PEO, lithium bis(trifluoromethanesulfonyl)imide, and acetonitrile, subsequently adding the Prussian blue analogues, followed by stirring and ultrasonicating to obtain a mixed solution; the mixed solution is then formed into the composite solid electrolyte using the electrospinning technique. This present disclosure utilizes the Prussian blue analogues with a three-dimensional nanochannel structure and high specific surface area as a raw material. After preparation of the composite solid electrolyte, the pores of the composite solid electrolyte are larger and uniformly distributed, and the special pore structure establishes more stable and efficient ion transport channels, enabling smoother ion conduction and leading to enhanced electrochemical performance.

The invention discloses a Prussian blue analogue carbon microsphere as well as a preparation method and application thereof. The Prussian blue analogue carbon microspheres are prepared by the following steps: S1, dispersing spherical silicon dioxide, transition metal salt, citrate and a dispersing agent in a solvent, uniformly stirring, then adding ferrocyanide for coordination reaction, and after the reaction, carrying out acid washing with a strong acid solution until coordination metal is completely removed, so as to obtain precursor powder; s2, calcining the precursor powder to obtain a carbon microsphere precursor; and S3, etching the carbon microsphere precursor until the spherical silicon dioxide is completely removed to obtain the Prussian blue analogue carbon microsphere. The average particle size of the spherical silicon dioxide is 7-100 nm. The Prussian blue analogue carbon microspheres prepared by the method can be used as a functional additive to be applied to a carbon-coated aluminum foil, so that the conductivity of the carbon-coated aluminum foil is improved.

A Prussian blue sodium-ion battery and its preparation method are disclosed, belonging to the field of sodium-ion battery technology. The specific solution is as follows: A Prussian blue sodium-ion battery includes a positive electrode and a negative electrode. The positive electrode includes a positive current collector and a positive active material layer on the surface of the current collector containing positive active material. The water content of the positive active material layer is 0-90 μg / g. Only a portion of the voltage plateau of the positive active material functions during battery charging and discharging. This invention fundamentally solves the problem of battery swelling and electrical performance degradation caused by water in the positive active material. Furthermore, by controlling the insertion / extraction depth of sodium ions in the Prussian blue positive electrode material, the damage caused to the structure of the Prussian blue positive electrode material by deep insertion / extraction of sodium ions during battery charging and discharging is reduced, thereby achieving long-cycle performance of the sodium-ion battery while maintaining a high specific capacity of the Prussian blue positive electrode material.

This invention belongs to the field of biochemical detection and discloses a portable hepatitis biomarker detection kit. The kit contains a hydrogel; the hydrogel is obtained by dispersing hollow manganese dioxide in water to obtain an H-MnO2 dispersion, mixing the H-MnO2 dispersion with sodium alginate solution to obtain a mixed solution, and then adding a calcium salt solution to obtain the hydrogel. The hollow manganese dioxide is obtained by etching manganese Prussian blue analog nanoparticles with sodium hydroxide. The manganese Prussian blue analog nanoparticles are prepared from potassium ferricyanide, polyvinylpyrrolidone, and manganese salts. This invention utilizes the color change of hollow manganese dioxide in relation to TMB to construct a method for detecting hepatitis biomarkers using a smartphone to capture signals. This kit reduces the detection cost of hepatitis biomarkers, does not require large instruments, and is highly portable and widely applicable, possessing great potential as a novel point-of-care testing device.

The invention belongs to the technical field of sodium ion batteries, and particularly relates to a Prussian blue sodium battery positive electrode material and a preparation method thereof.The preparation method comprises the steps that anhydrous sodium ferrocyanide, anhydrous manganese sulfate and a NaA molecular sieve are mixed and preliminarily ground, and a precursor mixture is obtained; placing the precursor mixture in a planetary ball mill for ball milling to obtain a primary reaction product; and washing the preliminary reaction product, and carrying out vacuum drying to obtain the Prussian blue sodium battery positive electrode material. The method is low in material loss and short in generation period, and the prepared Prussian blue sodium battery positive electrode material is low in crystal water content and has good cycle stability.

The invention provides a colorful Prussian blue film as well as a preparation method and application thereof. The preparation method comprises the following steps: placing a conductive material coated with a metal layer on the surface in a Prussian blue precursor solution, and growing a Prussian blue film layer on the surface of the metal layer in situ to obtain a Prussian blue film layer-metal layer-conductive material layer complex, namely the colorful Prussian blue film. The invention provides a colorful Prussian blue film which is characterized in that a metal layer is sputtered on the surface of conductive glass, on one hand, the problem of poor adhesion between Prussian blue and the conductive glass is solved, and on the other hand, Prussian blue grows on the surface of the metal layer in situ, so that a potential difference is formed between metal and iron ions, and the Prussian blue film is obtained. Further, prussian blue grows on the surface of the metal layer layer by layer, the multi-color film can be constructed by utilizing different thicknesses of the prussian blue layer, and the color of the multi-color film can be changed under the driving of voltage, so that the color gamut of the multi-color film is further enriched; the technical scheme provided by the invention has universality, and the preparation method is simple, low in cost and wide in application prospect.

The invention discloses a lanthanide-doped Prussian blue positive electrode material and a preparation method and application thereof, and the preparation method comprises the following steps: mixing and dissolving sodium ferrocyanide and lanthanide metal salt to obtain a mixed solution; and under a protective atmosphere, dropwise adding the mixed solution into a mixed chelating agent salt solution through a peristaltic pump, and reacting to obtain the lanthanide-doped Prussian blue positive electrode material. The lanthanide metal in the lanthanide-doped Prussian blue positive electrode material occupies the Na site, the single iron source coprecipitation method is adopted for synthesis, the process concentration is uniform, the synthesized positive electrode material has fewer defects, the material structure is stable, the rate capability is excellent, the specific capacity is high, and the application prospect is very good.

The invention belongs to the technical field of adsorption material preparation, and relates to an anion defect type prussian blue analogue and a preparation method and application thereof in cesium adsorption.The preparation method comprises the steps that imidazole and halogenated alkane are subjected to an alkylation reaction and anion exchange to prepare ionic liquid, and after water is added, an ionic liquid-water mixed solvent is obtained; the method comprises the following steps: respectively dissolving transition metal nitrate and potassium ferrocyanide into an ionic liquid-water mixed solvent, dropwise adding a potassium ferrocyanide solution into a transition metal nitrate solution, and stirring to obtain a mixed solution; and carrying out hydrothermal reaction on the mixed solution, cooling to room temperature, washing the material, and drying to obtain the anion defect type prussian blue analogue. The cesium ion adsorption capacity and the cesium ion cycling stability are improved by precisely regulating and controlling anion defects in the Prussian blue analogue, and the cesium ion adsorption material has good ion interference resistance in a complex water environment and shows excellent adsorption selectivity and a wide application range.

This invention relates to the field of electrocatalytic materials technology, specifically to a ternary metal Prussian blue analogue-based partial conversion sulfur phosphating electrocatalyst, its preparation method, and its application. A CoMoO4 nanorod array is grown on a nickel foam surface via a hydrothermal method, further generating an in-situ FeCoNi-PBA precursor to form a hollow, embedded cubic structure. Hydrothermal sulfidation yields hollow, porous NiCo2S4 nanorods; subsequent low-temperature gas-phase phosphating achieves partial conversion of NiCo2S4, generating a NiCoP shell in-situ on the surface, forming a core-shell heterogeneous interface with the core, resulting in a NiCoP / NiCo2S4 / NF electrocatalyst. Compared to traditional bifunctional electrocatalyst preparation methods, this invention utilizes a two-step "sulfidation followed by phosphating" method to construct a stable heterogeneous interface in-situ on a conductive substrate, enabling the resulting catalyst to exhibit both good hydrogen evolution and oxygen evolution activity and long-term stability under high current in alkaline water electrolysis.

The invention belongs to the technical field of salt lake resource development and rare metal recovery, and discloses a fibrous rubidium adsorbent as well as a preparation method and application thereof, a metal-based Prussian blue analogue spinning solution is synthesized in a non-aqueous system through a one-pot method, and the fibrous rubidium adsorbent is directly prepared through wet spinning. The preparation of the powder adsorbent and the molding of the composite material are integrated, so that the process is simplified, and the problem of powder agglomeration is avoided. The prepared fibrous rubidium adsorbent has the rubidium ion adsorption capacity of 248.73 mg / L, achieves adsorption equilibrium within 7 min, is suitable for industrially recovering rubidium from high-salinity salt lake brine, and has remarkable economic and environmental benefits.

The utility model discloses a heavy gas turbine ceramic heat insulation tile mounting groove size coloring mark inspection tool, which is characterized in that a ceramic heat insulation tile block simulates the actual mounting state of a reignition gas turbine when leaving a factory according to the geometric dimension of a ceramic heat insulation tile block mounting groove through a coloring mark inspection method; judging whether the ceramic heat-insulating tile mounting groove meets the geometric requirements of the drawing or not according to the area of the mounting mark of the ceramic heat-insulating tile mounting groove; according to the method, a simulation gas turbine installation detection tool is required to be coated with a Prussian blue / red lead powder coloring agent; then the ceramic heat insulation tile blocks are installed, and in the process, the coloring agent can be attached to the surfaces of the ceramic tile block installation grooves; and analyzing and judging whether the position and the size of the mark on the tooth surface meet the requirements. Compared with the existing detection technology, the device simulates the real working condition of the ceramic tile to carry out coloring inspection, and compared with the traditional three-coordinate size measurement, the detection cost is reduced, the detection precision is improved, and meanwhile, the delivery detection efficiency of the ceramic tile is improved.

The invention is suitable for the technical field of catalysts for hydrogen production through electrolysis of water, and provides a medium-entropy Prussian blue analogue derivative sulfide catalyst and a preparation method thereof.The preparation method comprises the following steps that Ni (NO3) 2.6 H2O and C6H5Na3O7. 2H2O are dissolved in deionized water, and a solution A is formed through magnetic stirring; dissolving K3 [Co (CN) 6] and K3 [Fe (CN) 6] in deionized water, and magnetically stirring to form a solution B; adding the solution B into the solution A, and stirring at room temperature to obtain a mixed solution; heating the mixed solution in a water bath and stirring; carrying out centrifugal treatment on the mixed solution, separating to obtain a precipitate, washing for multiple times, and carrying out vacuum drying overnight to obtain a FeCoNi-PBA precursor; the FeCoNi-PBA precursor and excessive sulfur powder are placed in two porcelain boats respectively, the two porcelain boats are placed on the downstream and the upstream of a tubular furnace, in the argon atmosphere, the temperature is increased, heat preservation treatment is conducted, and the medium-entropy sulfide named as FeCoNi-S is obtained. The bifunctional catalyst with rich defects and high specific surface area is prepared, and efficient and stable hydrogen production and oxygen production through water electrolysis are achieved.

The invention belongs to the technical field of pharmaceutical preparations, and particularly relates to monocyte entrapped hollow Prussian blue nanoparticles and application thereof. The monocyte entrapped hollow Prussian blue nanoparticles are obtained by entrapment of small-size dextran modified Prussian blue drug-loaded nanoparticles (DSS / PB (at) BSP) in a monocyte. The monocyte entrapped hollow Prussian blue nanoparticles provided by the invention can significantly prolong the accumulation and retention time of drugs in an inflammatory microenvironment, and have a higher treatment effect and a smaller side effect compared with free drugs. Besides, the monocyte entrapped hollow Prussian blue nanoparticles can be reprogrammed into anti-inflammatory macrophages, anti-inflammatory factors are released at disease parts, and the treatment effect is improved.

The application discloses a novel zinc-copper prussian blue analogue composite nanomaterial and a preparation method and antibacterial application thereof. The preparation of the material comprises the following steps: S1: Zn(NO3)2.6H2O, Cu(NO3)2.3H2O, Na3C6H5O7.2H2O and AgNO3 are dissolved in deionized water to obtain solution A by stirring; S2: K3[Fe(CN)6] is dissolved in deionized water to obtain solution B by stirring; S3: solution B is slowly poured into solution A, and the mixture is aged at room temperature, centrifuged, washed and vacuum dried; and S4: the dried product is calcined to obtain the final product. The composite nanomaterial has excellent broad-spectrum antibacterial activity, various catalytic activities (POD, GSHOx and CAT) of simulated natural enzymes and good biocompatibility, and has great application potential in the fields of antibacterial treatment, anti-biofilm infection and biomedicine.

The application relates to the field of electrochemical analysis methods, and particularly discloses a preparation method of an electrode capable of simultaneously detecting amaranth, carmine and indigo and application of the electrode; the electrode preparation method is as follows: firstly, Fe / Co Prussian blue seed modified carbon fiber paper is prepared through a chemical deposition method; secondly, the Fe / Co Prussian blue seed modified carbon fiber paper is subjected to a hydrothermal reaction to prepare hollow cubic octahedral Fe / Co Prussian blue nanomaterial modified carbon fiber paper electrode; finally, the hollow cubic octahedral Fe / Co oxide nanomaterial modified carbon fiber paper electrode (CoFe2O4@CFP) is obtained through calcination. The CoFe2O4@CFP electrode is used as a working electrode, and the content of the three pigments, i.e. amaranth, carmine and indigo, in a sample to be detected can be simultaneously detected by adopting a differential pulse voltammetry method combined with a chronoamperometry method. Compared with other methods, the method has the advantages of simple preparation, rapid detection, wide application in simultaneous determination of amaranth, carmine and indigo in actual samples such as candies, tap water and beverages, high detection sensitivity, wide detection range and great practical application potential.

The invention provides a Prussian blue analogue derivative Ce-doped Co-based catalyst and a preparation method thereof.The preparation method comprises the steps that cerium salt and cobalt salt are dissolved and mixed to prepare a mixed solution, cobalt potassium cyanide solution is prepared, the cobalt potassium cyanide solution is dropwise added into the mixed solution, and the Prussian blue analogue derivative Ce-doped Co-based catalyst is obtained after the cobalt potassium cyanide solution is dropwise added into the mixed solution; the Ce-doped Co-based catalyst is prepared by dropwise adding a mixed solution or a cobalt cyanide potassium solution, adding polyvinylpyrrolidone into the mixed solution or the cobalt cyanide potassium solution before dropwise adding to further regulate and control the reaction rate, carrying out stirring reaction and aging to obtain a metal organic framework precursor with an irregular morphology, and finally calcining to obtain the Ce-doped Co-based catalyst. Based on earlier-stage scientific achievements, when cobalt salt is additionally added to regulate and control the proportion of Ce and Co elements, it is accidentally found that when other cobalt salt and cerium salt coexist, Co-Co coordinated Ce-doped irregular-morphology Prussian blue analogues can be formed, and under the specific Ce and Co element proportion condition, the Prussian blue analogues can be used for preparing the Prussian blue analogues with the Co-Co coordinated Ce-doped irregular-morphology Prussian blue analogues with the Co-Co coordinated Ce-doped irregular-morphology Prussian blue analogues. And after being calcined, the catalyst has obviously higher ammonia decomposition conversion rate under a relatively low-temperature condition.

The invention relates to a preparation method and antibacterial application of an adjustable manganese-based Prussian blue analogue. Through metal ion doping and lattice engineering regulation and control, a manganese element is introduced into a Prussian blue frame structure, and controllable regulation of the doping amount and optimization of a crystal structure are realized. The prepared material has excellent photothermal conversion capability and multienzyme simulation activity, and shows a photothermal-enzyme synergistic enhancement effect under the irradiation of near-infrared light. In-vitro studies show that the material can efficiently inhibit the growth of gram-negative bacteria; animal experiments further verify that the composition has a remarkable curative effect in infected wound repair. The invention not only provides a preparation method of a nano material with controllable metal doping, but also provides a novel photo-enzyme synergistic treatment method for drug-resistant bacterium infection treatment.

The application relates to a preparation method of a poly-pyrrole-prussian blue hybrid photothermal nanolaser, polyvinylpyrrolidone is added into deionized water and stirred until completely dissolved, pyrrole and potassium ferrocyanide are added into the obtained polyvinylpyrrolidone solution, stirring is uniformly conducted, then ferric chloride hexahydrate is added, sufficient stirring and reaction are conducted, a reaction liquid is obtained, after the precipitation is removed through centrifugation, the supernatant is dialyzed and vacuum freeze-dried, and the poly-pyrrole-prussian blue hybrid photothermal nanolaser is obtained.Compared with the prior art, the method has lower requirements on equipment, mild reaction conditions, is green and environment-friendly, is suitable for large-scale production, the prepared photothermal nanolaser has good photothermal ablation effect under the irradiation of near-infrared light, can significantly inhibit the growth of tumor cells, the photothermal nanolaser also has good oxygen production performance, can decompose hydrogen peroxide to generate oxygen, and can further improve the tumor hypoxic microenvironment and enhance the in-situ thermal ablation treatment effect of the tumor, thereby providing a potential technical means for relieving the tumor hypoxic microenvironment and strengthening the in-situ thermal ablation.

The application discloses a reaction device for synthesizing a Prussian blue analogue positive electrode material for a sodium ion battery, and relates to the field of a sodium ion battery positive electrode material synthesis process.The device comprises a protective gas system, a deionized water system, a vacuum system, a reaction kettle, double premix kettles and a control system; each kettle is provided with a jacket heat exchange, stirring and full-closed sealing structure, the premix kettles realize synchronous equal proportion dropping of precursors through cooperation of high-precision flow meters driven by pressure in the kettles, and the reaction kettle is integrated with a porous support plate and a double-layer sealing filter structure at the bottom, so that positive pressure filtration and washing can be completed in situ.The application also discloses a use method of the device, realizes full-process closed oxygen-free operation, significantly improves batch consistency of products, and is suitable for large-scale production of Prussian blue analogues.

The invention belongs to the technical field of biological materials, and provides a preparation method and application of a Prussian blue loaded nattokinase nanocomposite, RPB-NK nanoparticles are prepared by establishing a mouse radiation-induced pulmonary fibrosis model, compounding Prussian blue and nattokinase and then coating, and the RPB-NK nanoparticles are applied to prevention and treatment of radiation-induced pulmonary fibrosis diseases. The treatment effect on radiation-induced pulmonary fibrosis is evaluated; results show that the RPB-NK nanoparticles have a treatment effect on radiation-induced pulmonary fibrosis and can relieve the degree of radiation-induced pulmonary fibrosis so as to achieve the purpose of preventing and treating radiation-induced pulmonary fibrosis.

The application discloses a nickel-based Prussian blue battery positive electrode material and a preparation method and battery thereof, and belongs to the technical field of batteries, wherein the preparation method of the nickel-based Prussian blue battery positive electrode material comprises the following steps: dissolving sodium citrate into a nickel chloride solution to obtain reagent A; dissolving sodium ferrocyanide in water to prepare a solution to obtain reagent B; dissolving polyvinylpyrrolidone in a sodium chloride solution to obtain reagent C; simultaneously and slowly adding the reagent A and the reagent B into the reagent C to obtain a suspension liquid and aging the suspension liquid; centrifugally separating the suspension liquid after aging, washing, drying and grinding to obtain the nickel-based Prussian blue battery positive electrode material; and the nickel-based Prussian blue battery positive electrode material prepared by the application has the characteristics of high capacity, low alternating current impedance and high long cycle stability, and has excellent electrochemical performance.

This invention discloses a method for preparing Prussian blue-based cathode materials without saline wastewater. The method employs a combined controlled crystallization and vacuum distillation process to synthesize Prussian blue-based materials. The entire preparation process is free of saline wastewater discharge, and the mother liquor generated from each batch can be recycled after filtration. Therefore, except for the first batch which requires the addition of sodium sulfate and a complexing agent to the base liquid, subsequent processes can directly utilize the same concentration of sodium sulfate and complexing agent in the mother liquor, avoiding fluctuations in salt concentration and saving raw material costs. The cathode materials synthesized using this method maintain consistent physicochemical properties such as particle size, tap density, and material composition between batches, as well as the electrochemical performance of the assembled batteries, indicating that the reused mother liquor as a base liquid does not affect the performance of the cathode material. This invention significantly simplifies the wastewater treatment facilities and process flow, eliminating the need for large-scale equipment such as MVR (Mechanical Vacuum Resiner) systems and effectively reducing material production costs.

The present application relates to a kind of wastewater comprehensive treatment method, specifically to treat a kind of sodium ion battery positive material prussian blue production process wastewater comprehensive treatment method.In the production process, two kinds of wastewater of high concentration salt and low concentration salt need to be discharged.This method is concentrated by evaporation high concentration salt wastewater, after cooling, sodium sulfate salt is precipitated, filtrate is obtained by filtration, and sodium citrate salt is crystallized.In order to save energy, low concentration salt wastewater is treated by different scheme, mixed with precipitant, so that citric acid and sulfuric acid insoluble salt solid are precipitated, to purify wastewater.The method comprehensively treats sodium ion battery material prussian blue production process wastewater, through appropriate crystallization and precipitation process, separates and recovers economic salt in high concentration salt wastewater, reduces the environmental problems caused by low concentration salt wastewater direct discharge, has economic and environmental benefits.