530 results about "Prussian blue" patented technology

The invention belongs to the technical field of novel energy storage battery materials, and particularly relates to a high-entropy Prussian blue positive electrode material as well as a preparation method and application thereof. The chemical formula of the positive electrode material is NaxM [Fe (CN) 6] y.mH2O (at) C, M comprises five different elements of Fe, Ni, Co, Mn, Zn, Ti, V or Cu, the molar ratio of the five different elements is 1: 1: 1: 1: 1-1: 3: 3: 3: 3, x is larger than 0 and smaller than or equal to 2, y is larger than 0 and smaller than or equal to 3, m is larger than 0 and smaller than or equal to 5, and the molar ratio of a carbon component to a high-entropy Prussian blue component is 1: 5-1: 10. Different physical and chemical properties of a plurality of metal elements are utilized, different transition metal elements are coordinated with cyano groups, respective advantages are exerted, the defects of a single metal element are overcome, a stable continuous transmission channel for sodium ions and electrons is constructed in a Prussian blue structure, and the performance of the Prussian blue is improved. Jahn-Teller distortion can be effectively inhibited through the synergistic effect of various metals, and the long cycle stability of the Prussian blue material is remarkably improved.

The invention discloses a Prussian blue type composite positive electrode material and a preparation method and application thereof, and the Prussian blue type composite positive electrode material provided by the invention is composite powder containing a Prussian blue type positive electrode material, a conductive agent, a binder and a functional additive, the mass ratio of the Prussian blue positive electrode material to the conductive agent to the binder to the functional additive is (90-99): (1-5): (0-5): (0-0.5). According to the Prussian blue composite positive electrode material provided by the invention, the components are uniformly distributed, the Prussian blue composite positive electrode material has the characteristics of high compaction, easy dispersion, relapse resistance, high conductivity and the like, and the Prussian blue composite positive electrode material can be directly used for wet homogenization and can also be directly used for dry electrode manufacturing.

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 Prussian blue analogue electrode and a preparation method and application thereof.The preparation method comprises the following steps that a manganese salt solution, a nickel salt solution and a potassium ferricyanide solution are prepared and added into water at the same time, a mixture with the molar ratio of manganese to nickel being larger than or equal to 0.1: 1 is obtained, aging, washing and drying are conducted, and the Prussian blue analogue electrode is obtained. And mixing the manganese-doped Prussian blue analogue with a binder, a conductive agent and a solvent, carrying out ultrasonic treatment to obtain an electrode slurry liquid, covering the surface of a current collector with the electrode slurry liquid, and drying to obtain the Prussian blue analogue electrode. The Prussian blue analogue electrode prepared by the method has the advantages of low energy consumption, high salt adsorption capacity, high salt adsorption rate and the like, can be used for desalting treatment as a capacitive deionization cathode, has the salt adsorption rate and the salt adsorption capacity which are more than two times of those of a conventional electrode, and is high in use value, good in application prospect and wide in application prospect. The method is of great significance in promoting wide application of the capacitive deionization technology.

The invention relates to the technical field of nano-enzyme preparation and electrochemical and colorimetric dual-mode sensing, and particularly discloses a Mn3Fe2.7-atC nano-enzyme, a preparation method thereof and application of the Mn3Fe2.7-atC nano-enzyme in determination of amoxicillin content. The preparation method of the Mn3Fe2.7 at C nano-enzyme is characterized by comprising the following steps: dissolving manganese chloride and trisodium citrate in water to prepare a solution A; dissolving potassium ferricyanide in water to prepare a solution B; adding the solution B into the solution A under a stirring condition, continuously stirring for 16-32 hours after the solution B is added, carrying out suction filtration, and drying the obtained precipitate to obtain a ferromanganese prussian blue analogue precursor; and placing the ferromanganese prussian blue analogue precursor in a tubular furnace, carrying out pyrolysis, and after the pyrolysis is finished, carrying out acid soaking, washing and drying to obtain the Mn3Fe2.7 at C nano-enzyme. When the Mn3Fe2.7 (at) C nano-enzyme is used for measuring the content of amoxicillin, the accuracy is good, and meanwhile, the Mn3Fe2.7 (at) C nano-enzyme has the advantages of interference resistance, stability, good recovery rate and the like.

The invention provides a preparation method of a manganese-based Prussian blue sodium ion battery positive electrode material, which comprises the following steps: firstly, adding a mixed solution of a part of manganese salt and a chelating agent into a sodium ferrocyanide solution at a first flow rate in a protective atmosphere for reaction; and continuously adding the residual mixed solution of the manganese salt and the chelating agent into the reaction system in the previous step at a first flow rate, adding the mixed solution of the transition metal salt and the chelating agent at a second flow rate, reacting again, and aging to obtain the manganese-based Prussian blue sodium-ion battery positive electrode material. The chelating agent is used for assisting coprecipitation to synthesize the Prussian blue analogue coated manganese-based Prussian blue sodium ion battery positive electrode material with stable heterogeneous lattices, so that the volume change and particle cracking of the positive electrode material in the charging and discharging process can be effectively inhibited in the circulating process, and the structure collapse is prevented; the cycle stability of the positive electrode material in the charge-discharge process is effectively improved, and the cycle life of the battery is prolonged.

The invention discloses a preparation method of a Prussian blue analogue (CoFe-PBA) and copper metal organic framework (HKUST-1) composite core-shell material and application of the composite core-shell material in oxygen evolution reaction (OER). The material is prepared through a step-by-step synthesis and composite process: firstly, synthesizing copper-based MOF (HKUST-1) and a ferrocobalt Prussian blue analogue (CoFe-PBA), then compounding the copper-based MOF (HKUST-1) and the ferrocobalt Prussian blue analogue (CoFe-PBA) through a solvothermal method to form a core-shell structure (HKUST-1-atCoFe-PBA), and further performing high-temperature oxidation and vulcanization treatment to obtain HKUST-1-atCoFe-O and HKUST-1-atCoFe-S materials. According to the composite material, the electron transmission efficiency and the catalytic activity are remarkably improved by utilizing the synergistic effect of multi-metal active sites of Cu, Co and Fe. No precious metal or strong corrosive reagent is used in the preparation process, the cost is low, and the green synthesis requirement is met. An electrochemical test shows that the OER overpotential of the optimized catalyst at the current density of 10mAcm is only 268mV, and the catalyst shows excellent catalytic performance. The material can be widely applied to the fields of water electrolysis hydrogen production and the like, and has important industrial application prospects.

The invention discloses a method for preparing a sodium-rich boundary-rich iron-based prussian blue analogue (FePBA) through one-step hydrothermal synthesis assisted by sodium thiosulfate. The method specifically comprises the following steps: preparing a solution A and a Na4Fe (I I) (CN) 6 solution; the molar ratio of ferrocyanide to Fe ions in the solution B is 3: 4. And preparing a solution B to react with ferrocyanide to form FePBA. Adding sodium citrate to form a sodium and citrate-rich environment, then adding ferric iron salt, and fully stirring to chelate the added Fe < 3 + > with the citrate; and adding sodium thiosulfate after the step. Preparing a PVP (Polyvinyl Pyrrolidone) solution to play roles in dispersing FePBA and reducing agglomeration, and taking the PVP solution as a solution C; slowly dropwise adding the solution A and the solution B into the solution C at a constant speed by using a rubber head dropper to finally obtain a precursor solution, carrying out hydrothermal reaction for 6 hours at 110 DEG C, carrying out suction filtration on the obtained precipitate, and drying to obtain a FePBA sample. According to the invention, the time required for synthesis is greatly shortened, and the traditional coprecipitation of more than 24 hours is improved into rapid hydrothermal reaction of 6 hours.

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 relates to a method for rapidly preparing a negative electrode of a lithium and sodium ion battery from a waste sodium electrode plate. Comprising the following steps: (1) respectively disassembling a Prussian blue positive pole piece, a hard carbon negative pole piece and a diaphragm in a sodium-electricity waste soft package, and soaking in deionized water; (2) respectively standing the solution obtained in the step (1), centrifuging, and drying in a blast oven; (3) directly tabletting the Prussian blue positive electrode powder dried in the step (2) and a diaphragm, preparing a slurry from the hard carbon negative electrode powder and sodium alginate with the concentration of 2% according to a ratio of 98: 2, and drying in a vacuum oven at 90 DEG C for 12 hours; the problem that the waste soft package of the sodium battery is difficult to recycle is solved. The obtained negative electrode material realizes electrochemical performance close to that of a fresh negative electrode under the carbonization of a rapid Joule heat means.

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 an oxsalazine-loaded hollow mesoporous prussian blue / polydopamine nano-enzyme as well as a preparation method and application thereof, and belongs to the technical field of material synthesis and molecular biology. Osalazine is loaded in hollow mesoporous Prussian blue (HMPB), and the surface of the hollow mesoporous Prussian blue is coated with a polydopamine layer. The composition is used for promoting IBD treatment. The drug loading system has good peroxidase activity, can quickly release drugs in an inflammatory environment for a long time, plays effective anti-inflammatory and anti-oxidation roles in IBD treatment, and has good biological safety.

The invention discloses manganese-based Prussian blue-polyacrylic acid / polyvinyl alcohol hydrogel for preventing and treating allergic rhinitis. Monodisperse manganese-based Prussian blue nanoparticles synthesized by taking polyacrylic acid as a template are stably immobilized in a polyacrylic acid / polyvinyl alcohol hydrogel matrix. The obtained composite hydrogel membrane has the following prominent advantages: the composite hydrogel membrane has excellent hydrogel characteristics, including controllable membrane thickness, good tissue adhesion and air permeability; reliable biocompatibility and safety are shown; allergen permeation is effectively blocked through a physical barrier effect; prussian blue is continuously released in the slow-release degradation process, active oxygen free radicals are remarkably removed, and the powerful anti-inflammatory effect is achieved. Due to the synergistic effect of double mechanisms of protection and treatment, the material has important clinical application value and development potential in the fields of prevention and treatment of allergic rhinitis.

The invention relates to a fluorescently-labeled Prussian blue nano-particle as well as a preparation method and application thereof, the fluorescently-labeled Prussian blue nano-particle is prepared, and a carboxyl functional group is reserved on the surface of the nano-particle and is used for being subsequently coupled with an antigen or antibody molecule through a covalent bond. The nano material can provide colorimetric and fluorescent dual-mode detection functions, is beneficial to enhancing the detection sensitivity of an immunochromatography technology, and meanwhile, retains the detection convenience. The material is simple in preparation method, low in cost and easy for large-scale production and application.

The invention relates to a negative active material and a preparation method thereof, a negative pole piece and a sodium ion battery. The negative electrode active material comprises a core-shell structure metal phosphide, and the core-shell structure metal phosphide comprises: an inner core, which comprises a bimetal phosphide derived from a Prussian blue compound; the shell layer covers at least part of the surface of the inner core, and the shell layer comprises metal phosphide. According to the negative electrode active material provided by the invention, through the synergistic effect of the bimetal phosphide derived from the Prussian blue compound in the inner core and the metal phosphide of the shell layer, the cycle performance and the rate capability of the battery are improved.

The invention discloses a soluble double-layer microneedle patch loaded with an LL37-coated ZIF-8 and Prussian blue nano-enzyme pharmaceutical composition and application, and belongs to the technical field of biomedical materials. The soluble double-layer microneedle patch provided by the invention comprises a needle body layer and a backing layer, the needle body layer comprises a pullulan polysaccharide matrix, LL37 (at) ZIF-8 and a Prussian blue nano enzyme; and the backing layer comprises a pullulan polysaccharide matrix. According to the preparation method, pullulan, LL37 ZIF-8 and Prussian blue nano enzyme (PB) are combined for use, so that the soluble double-layer microneedle patch integrating efficient antibiosis, continuous antioxidation, healing promotion and biocompatibility can be obtained, and the application performance is good; and the preparation method has the advantages of mild reaction conditions, simple preparation, low raw material price, easiness in batch production and manufacturing and the like, and is easy for large-scale production.

The invention provides a selective adsorption thallium removal agent and a preparation method thereof, and belongs to the technical field of adsorption materials. The thallium removal agent provided by the invention comprises bentonite and Prussian blue loaded on the bentonite, the mass of the Prussian blue accounts for 10-30% of the mass of the bentonite, the crystal space after the bentonite absorbs water and expands is fully utilized, and Prussian blue nanoparticles are uniformly dispersed between layers and on the surface of the bentonite, so that the thallium removal agent is prepared. The adsorption sites of Prussian blue and bentonite are fully exerted, and the adsorbability of thallium ions in wastewater is greatly improved.

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.

The invention relates to a heavy metal removal method for constructing a micro electric field based on cooperation of metal self-corrosion and ion confinement. The heavy metal removal method comprises the following steps that metal with self-corrosion performance serves as an anode, a copper-iron Prussian blue frame material electrode with an ion confinement structure serves as a cathode, heavy metal wastewater serves as electrolyte, and a micro electric field with the energy self-supply characteristic is constructed; and carrying out electrochemical reaction to limit the heavy metal ions in the cathode framework material so as to remove the heavy metal in the wastewater. Compared with the prior art, by constructing the micro electric field with the energy self-supply characteristic and combining the metal iron anode with the negative oxidation-reduction potential and the copper-iron Prussian blue cathode with the ion confinement structure, efficient selective adsorption and stable curing of the heavy metal ions are achieved, and dependence on an external power source or a light source is not needed.

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 provides a high-entropy Prussian blue material and a preparation method and application thereof, and relates to the technical field of electrochemical material preparation and energy. The preparation method of the high-entropy Prussian blue material comprises the following steps: mixing a cobalt source, a nickel source, a copper source, a manganese source, a zinc source, an organic reducing compound and a first dispersing agent to obtain a first mixture; the molar ratio of the cobalt source to the nickel source to the copper source to the manganese source to the zinc source is 1: 1: 1: 1: 1; mixing the ferricyanide compound with a second dispersing agent to obtain a second mixture; and sequentially stirring and standing the first mixture and the second mixture to obtain the high-entropy Prussian blue material. The high-entropy Prussian blue material prepared by the method is stable in morphology, high in crystallinity and high in chemical stability, and can be applied to the field of electrochemical energy storage.

The invention relates to the technical field of lithium ion batteries, in particular to a composite solid electrolyte as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing polyoxyethylene, lithium bis (trifluoromethylsulfonyl) imide and acetonitrile, then adding a Prussian blue analogue, stirring, and carrying out ultrasonic treatment to obtain a mixed solution; and preparing the mixed solution into the composite solid electrolyte by adopting an electrostatic spinning mode. According to the invention, the Prussian blue analogue with a three-dimensional nanopore structure and a high specific surface area is selected as a raw material, and after the composite solid electrolyte is prepared, the pores of the composite solid electrolyte are relatively large and are uniformly distributed. The special pore structure constructs a more stable and more efficient ion conduction channel, so that the ion conduction is smoother, and the electrochemical performance is improved.

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 provides a gallium nitrate modified Prussian blue nano composite material as well as a preparation method and application thereof, and the gallium nitrate modified Prussian blue nano composite material comprises Prussian blue nano particles and gallium nitrate loaded on the Prussian blue nano particles, according to the preparation method, gallium ions are loaded on the Prussian blue nanoparticles in an ion replacement manner. Through the synergistic effect of Prussian blue and gallium ions, the synergistic effect of photothermal therapy and ion release is achieved, damage to normal tissue or cells is avoided, the sterilization effect can be improved, the concentration needed for antibiosis is low, and meanwhile the good biocompatibility, antioxidant activity and spectrum sterilization effect are achieved.