279 results about "Europium" patented technology

The invention provides a samarium / europium / gadolinium-containing zirconium hydride block as well as a preparation method and application thereof, and relates to the technical field of radiation shielding materials. The zirconium hydride block containing samarium / europium / gadolinium comprises the following elements in percentage by mass: 95% < = Zr < = 99.5%, 0% < = Gd < = 5%, 0% < = Sm < = 5%, 0% < = Eu < = 5% and 0% lt. Gd + Sm + Eu < = 5%. The preparation method comprises the following steps: respectively hydrogenating sponge zirconium, metal gadolinium, metal europium and metal samarium to respectively obtain corresponding hydride powder; weighing zirconium hydride powder, gadolinium hydride powder, europium hydride powder and samarium hydride powder according to a required proportion, and uniformly mixing under a protective atmosphere; and carrying out pressure sintering on the mixed powder, and carrying out secondary hydrogenation to obtain the zirconium hydride block containing samarium / europium / gadolinium. According to the invention, the absorption of the material to low-energy-segment neutrons can be obviously improved; and the preparation of the zirconium hydride block containing samarium / europium / gadolinium and the accurate regulation and control of doped elements are realized.

The invention relates to a red fluorescent material excited by blue light, an LED device and fluorescent ceramic. The chemical formula of the red fluorescent material is La (2-x) MgNbO6.5: xEu < 3 + >, wherein x is more than or equal to 0.01 and less than or equal to 0.1. The preparation method comprises the following steps: weighing lanthanum oxide, magnesium oxide, niobium oxide and europium oxide raw materials according to a stoichiometric ratio, grinding and uniformly mixing; sintering the uniformly mixed powder in a muffle furnace at high temperature, and cooling to room temperature to obtain the red fluorescent material. Compared with the prior art, the novel oxide-based red fluorescent powder prepared by the invention can emit positive red light of which the central wavelength is 616nm under the excitation of 465nm blue light, and can be used for white light LED (Light Emitting Diode) luminescent devices and fluorescent ceramics.

The invention belongs to the field of fluorescence detection, and particularly relates to a ratio-type fluorescent nanoprobe for specifically detecting tetracycline antibiotics as well as a preparation method and an application method of the ratio-type fluorescent nanoprobe. The nano-probe is a europium modified zinc gallium germanate nano-material, and is prepared by amino modification, citric acid modification and europium modification of the zinc gallium germanate nano-material. The probe can be specifically combined with tetracycline antibiotics; the fluorescent probe has two different fluorescence emission intensities, so that interference can be effectively eliminated, and the detection accuracy is high. And the synthesis method is simple and low in cost. The ratio type fluorescent nanoprobe provided by the invention also can realize the change of different colors under an ultraviolet lamp, can realize quantitative visual detection of tetracycline by combining the RGB value and the tetracycline concentration change, and can realize rapid on-site detection of tetracycline in a sample without the help of a fluorescent instrument. The tetracycline fluorescent probe is stable in optical performance, not prone to photobleaching, high in tetracycline recognition capacity, wide in response range (0.2-70 [mu] M) and low in detection limit, and has remarkable industrial application potential.

The invention belongs to the technical field of magnetic refrigeration, and particularly discloses a rare earth europium-based zirconate magnetic refrigeration material and a preparation method and application thereof. The general chemical formula of the rare earth europium-based zirconate magnetic refrigeration material is (Eu1-xMx) (Zr1-yNy) O3, M is any one of Ca, Sr or Ba, N is any one of Nb, Ta, Ti or Hf, x is more than or equal to 0 and less than or equal to 0.5, y is more than or equal to 0 and less than or equal to 0.5, and the magnetic phase transition temperature of the rare earth europium-based zirconate magnetic refrigeration material is less than 10K. The magnetic refrigeration material shows excellent magnetocaloric performance near the liquid helium temperature, and is expected to be applied to the liquid helium temperature zone magnetic refrigeration technology; and the preparation method is simple in process, safe and environment-friendly, and can be applied to industrial production.

The invention discloses a cobalt-iron layered double-metal hydroxide water treatment catalyst, which is characterized in that the cobalt-iron layered double-metal hydroxide is doped with europium element. Compared with existing ferrocobalt layered double hydroxides, after europium is doped, europium can generate a synergistic interaction effect with iron and cobalt, so that the catalytic activity of the material is remarkably improved.

The invention discloses a triiodothyronine dissociation agent, a detection kit, a preparation method of the triiodothyronine dissociation agent and application of the triiodothyronine dissociation agent and the detection kit, and the triiodothyronine dissociation agent comprises 10-100 mM of acetic acid-sodium acetate buffer solution, 0.05-1 g / L of ethylene diamine tetraacetic acid disodium salt, 1-10 g / L of perfluoroalkyl ethyl methacrylate, 0.2-1 mL / L of Tween-20 and 0.2-2 mL / L of ProClin 300, the pH (Potential of Hydrogen) of the triiodothyronine dissociation agent is 5.5 + / -1; the kit comprises a triiodothyronine dissociation agent and a reagent strip. According to the present invention, the two sites can be specifically recognized, the sensitivity and the specificity are high, the high-specificity detection on the specific antigen can be achieved, and the low-end sensitivity is high; meanwhile, the interference problem of rare earth europium during detection of triiodothyronine can be solved, and the accuracy of a detection result is further improved.

The invention provides a doped yttrium hydride neutron moderation material and a preparation method and application thereof, and belongs to the technical field of radiation shielding materials. At least one of samarium, europium and gadolinium is doped in yttrium hydride in the form of hydride, and the mass ratio of metal yttrium to metal gadolinium to metal europium to metal samarium is controlled, so that the neutron moderation effect of the neutron moderation material can be improved. According to the invention, at least one of gadolinium hydride, europium hydride and samarium hydride is mixed with yttrium hydride under the protective atmosphere, so that the mass content of each element in the doped yttrium hydride neutron moderation material can be accurately controlled. According to the invention, the mixture is sintered and molded, and the sintering parameters of sintering and molding are controlled, so that the components of the mixture are sintered in a compact state, cracks generated by thermal expansion and cold contraction can be reduced, and the doped yttrium hydride keeps high density and has fewer cracks and defects.

The invention discloses a preparation method of a cellulose nanocrystalline composite film with circular polarization luminescence characteristics. The preparation method specifically comprises the following steps: step 1, synthesizing europium macromolecules; and 2, preparing the coating type circular polarization luminous cellulose composite film according to the product obtained in the step 1. The invention further discloses the cellulose nanocrystalline composite film with the circular polarization luminescence characteristic. The problems that an existing composite film is low in asymmetric factor and unstable in CPL performance are solved.

The invention relates to a lanthanide oxide electrochemiluminescence aptamer sensor with dual signal amplification for detecting acetamiprid as well as a preparation method and application of the lanthanide oxide electrochemiluminescence aptamer sensor. According to the sensor, terbium-doped europium oxide (Eu2O3: Tb < 3 + >) modified by gold nanoparticles (Au NPs) is used as a luminous body, and the electrochemical luminescence performance can be remarkably improved through multiple mechanisms: on one hand, the Au NPs can effectively promote generation of more sulfate free radicals; on the other hand, the surface defect passivation effect and the efficient synergistic effect of energy transfer jointly achieve effective amplification of signals. In addition, the wool ball-shaped Ag NPs is used as a plasma resonance signal amplification source, so that the ECL intensity of the sensor is further enhanced. The prepared electrochemical luminescence sensor with the dual signal amplification effect is used for detecting acetamiprid (ACE), has a wide linear range and a low detection limit, and has a wide application prospect in detection of acetamiprid residues in a water environment.

The invention discloses europium-doped hydrotalcite for enhancing PVC (polyvinyl chloride) light transmission and a preparation method and application thereof, and belongs to the technical field of high polymer materials and inorganic nanomaterials. Trivalent europium (Eu < 3 + >) is doped into a lattice structure of LDHs (layered double hydroxides) through europium-doped coprecipitation, surface silanization and ultrasonic dispersion technologies; refractive index matching (1.50-1.53) is achieved, and light scattering is reduced. The particle size of the optimized hydrotalcite is controlled to be 50-150 nm, so that the light transmittance of the PVC composite film reaches 93% or above, and meanwhile, the PVC composite film has the characteristic of red fluorescence. Compared with the prior art, the material has the advantages that the transparency is improved, the heat-resistant stability and aging resistance of PVC are remarkably improved, the material is suitable for the fields of transparent films, daylighting panels, optical marks and the like, and the hydrotalcite nano material provided by the invention has the dual effects of refractive index matching and conversion from ultraviolet light to visible light; the light transmittance and the ageing resistance of the PVC material can be obviously improved at the same time.

The invention relates to rare earth doped perovskite quantum dot glass and a preparation method thereof, and belongs to the technical field of inorganic functional materials and optical functional glass. The method comprises the following steps: preparing nanopore SiO2-Al2O3 glass as a matrix by adopting a sol-gel method, adding a lead source and a rare earth europium source, drying and sintering to obtain uniformly-doped porous glass, soaking the uniformly-doped porous glass in a CsBr methanol solution, and generating the CsPbBr3 perovskite quantum dots in situ. In the glass, the CsPbBr3 quantum dots show wavelength-adjustable broadband luminescence, the Eu < 3 + > ions show narrow-band luminescence, and the CsPbBr3 quantum dots and the Eu < 3 + > ions show double-peak reverse fluorescence response under the action of hydrogen chloride gas. The aperture structure can be controlled by adjusting the use amount of the aluminum lactate, so that the size and the luminescence property of the quantum dot and energy transfer between the quantum dot and Eu < 3 + > ions are adjusted, and the luminescence property and the response characteristic are optimized. The material is uniform in doping, stable in structure and suitable for the fields of multiband luminescent devices and gas sensing.

The application discloses a preparation method of a customized porous TMJ prosthesis deposited with europium-doped black phosphorus nanosheets, and comprises the following steps: S1, CBCT is used to shoot medical image data, which is imported into Mimics software to reconstruct a model, the reconstructed model is imported into Geomagic software to simulate bone cutting, and a craniofacial model STL file is obtained; S2, TMJ prosthesis customization design is performed on the craniofacial model STL file; S3, SLM printing technology is adopted to perform 3D printing on the customized TMJ prosthesis model, and a prosthesis entity is obtained; and S4, a polydopamine europium-doped black phosphorus nanosheet surface coating is constructed on the porous region of the prosthesis entity model. The application realizes product customization by adopting computer-aided design and three-dimensional printing technology; the europium-doped black phosphorus nanosheet coating is constructed on the porous region of the prosthesis, the mandibular stump and the buccal region are promoted to grow into bone, the traditional "two-dimensional fixation" is changed into "three-dimensional fixation", and the limitation of screw loosening, falling off and bone resorption is got rid of.

The present invention discloses a dual-emission metal organic framework composite nanomaterial and its application in ratiometric detection of tetracycline antibiotics. The dual-emission metal organic framework composite nanomaterial is loaded with blue carbon quantum dots, adenosine-5'-monophosphate sodium salt and Eu 3+ The UiO-66 metal organic framework material has a size of 20 to 50 nm. The present invention uses adenosine-5'-monophosphate sodium salt to modify the metal organic framework, which increases the rigidity of the material and ensures the Eu 3+ The stable loading of carbon quantum dots into a metal-organic framework material overcomes the difficulty of separating carbon quantum dots in practical applications. The composite nanomaterial utilizes the pre-enrichment effect of the metal-organic framework, using the blue carbon quantum dot signal as a reference signal and the red europium signal as a response signal to achieve ratiometric detection of tetracycline antibiotics. This method offers the advantages of high sensitivity and fast response speed, with a detection limit of 5.6 nM for tetracycline and a response time of only 10 seconds.

The present invention belongs to the fields of catalysts and petrochemicals, and specifically relates to a catalyst, its preparation method, and its application. The catalyst comprises a composite support and an active metal Ni supported on the composite support. The composite support is composed of a modifier and a natural mineral compound, wherein the modifier comprises zirconium and a rare earth metal. The natural mineral is selected from one or more of diatomaceous earth, sepiolite, halloysite, attapulgite, vermiculite, and molybdenite. The rare earth metal is selected from one or more of yttrium, lanthanum, cerium, neodymium, samarium, europium, gadolinium, and ytterbium. The catalyst of the present invention has good structural stability and exhibits high activity and selectivity in the catalytic production of DMS. The catalyst of the present invention exhibits excellent performance in the hydrogenation of DMM to produce DMS, effectively improving DMS selectivity and reducing the production of GBL, BDO, and THF.

This invention belongs to the field of gas sensor technology and discloses a method for preparing europium ferrite nanosensors and their applications. This method utilizes electrospinning technology combined with a specific low-temperature confined-domain calcination process (550℃~700℃) to prepare EuFeO3 nanotubes with a hollow structure and rough surface by taking advantage of the thermal decomposition kinetics differences of poly(p-v) magnets (PVP). This process effectively suppresses excessive repair of lattice oxygen while forming a unique tubular morphology, effectively "freezing" oxygen vacancies (O2) accounting for up to 34.44% on the material surface in situ. v This invention addresses the shortcomings of traditional solid fiber materials by constructing a sensor using a grinding, dispersion, and coating process. Utilizing the dual reactive surfaces of hollow nanotubes and high-concentration oxygen vacancy active sites, it achieves highly sensitive and selective detection of low-concentration ethylene gas released during fruit ripening. This invention solves the problems of small specific surface area and insufficient active sites in traditional solid fiber materials.

The present invention relates to the field of nanomaterial synthesis, and discloses an upconversion luminescent material, a preparation method thereof, and an application thereof. The preparation method of the upconversion luminescent material comprises: (1) first stirring an ytterbium salt solution, an ammonium molybdate tetrahydrate solution, and a rare earth metal salt solution to obtain an intermediate I; the rare earth metal salt in the rare earth metal salt solution is selected from at least one of an erbium salt, a holmium salt, a praseodymium salt, and a europium salt; (2) subjecting the intermediate I to a hydrothermal reaction in a hydrothermal reactor to obtain an intermediate II; and (3) sequentially subjecting the intermediate II to a drying treatment and a calcination treatment to obtain the upconversion luminescent material. The upconversion luminescent material particles prepared by the method of the present invention have an average particle size of nanometer level, a good degree of crystallinity, and good reverse thermal quenching performance.

This invention discloses a method for preparing diamond rare-earth europium (EEUR) color core particles, belonging to the field of non-metallic element materials. The method involves coating a europium oxide suspension onto a single polished silicon wafer, followed by microwave plasma chemical vapor deposition (CPCVD) to form EEUR color core particles. This method allows for the growth of EEUR color core particles on the surface of a diamond film. The absence of obvious traces of Eu₂O₃ nanoparticles on the surface of the EEUR color core particles indicates that the diamond implantation solution within the europium oxide particles rapidly forms the EEUR color core particles during CPCVD, resulting in the diamond core ultimately covering the europium oxide particles, thus forming a core-shell structure, i.e., the diamond rare-earth europium color core particles. The obtained EEUR color core particles are mostly irregularly shaped with a diameter of approximately 8 μm.

This invention discloses a NiAlEu-LDHs photocatalyst, its preparation method, and its application in catalytic CO2 synthesis of syngas, belonging to the field of catalyst preparation technology. The NiAlEu-LDHs photocatalyst is a europium-doped layered double hydroxide prepared by a hydrothermal reaction using nickel, aluminum, and europium sources, possessing a multi-level nanoflower-like structure assembled from nanosheets. The preparation method includes the following steps: a one-step hydrothermal method is used to dissolve the nickel, aluminum, and europium sources, along with urea and ammonium fluoride, in deionized water; the solution is then transferred to a polytetrafluoroethylene-lined autoclave for hydrothermal reaction. This invention introduces europium through a one-step hydrothermal method, constructing a europium-doped nanoflower-like NiAlEu-LDHs photocatalyst. In production applications, this invention's preparation method is simple and novel, with low synthesis cost, easy mass production, and significant application value.

This invention discloses a bioactive glass and its preparation method, belonging to the field of bioactive glass technology. It aims to solve the problems of insufficient synergistic effect between antibacterial efficacy and bone-promoting activity in existing materials, as well as the inability to monitor in vivo degradation processes in real time. The bioactive glass comprises 44-48 parts silica; 22-27 parts calcium oxide; 22-27 parts sodium oxide; 5-7 parts phosphorus pentoxide; 2-4 parts europium zinc complex; 10-20 parts chitosan; 1-5 parts lidocaine; and 2-5 parts dilute acetic acid solution. The addition of the europium zinc complex promotes bone formation and enhances antibacterial activity, achieving a highly efficient synergy between anti-infection and tissue regeneration. Simultaneously, it provides optical tracking capabilities, allowing for non-destructive real-time monitoring of the material's degradation behavior and tissue integration in vivo via fluorescence imaging. This invention offers superior material performance and a simple preparation process, providing an innovative solution for the repair of infected bone defects.

The present invention discloses a preparation method of Eu(II)-MOF without the protection of reducing gas and its application in constructing an electroluminescent sensor for detecting novel environmental estrogens using this material as a near-infrared probe, belonging to the technical fields of environmental pollution prevention and control, electroluminescent sensing, nanomaterials, and metal-organic framework materials. The main steps are to use 1,10-phenanthroline and europium chloride as raw materials to prepare Eu(II)-MOF as a luminescent probe by hydrothermal method with the assistance of a reducing agent, and then use a two-step method to synthesize Fe3O4-Ag nanorods as a substrate material to construct a near-infrared competitive electroluminescent sensor. The raw materials used in the preparation of this material have low cost, the preparation process is simple, the reaction energy consumption is low, and it has industrial application prospects. Moreover, the constructed near-infrared electroluminescent sensor can work stably and efficiently under environments such as high temperature, high pressure, and heavy pollution, is suitable for environmental pollution detection, and has strong practical value.

The invention relates to the field of combined application of MOF (Metal Organic Framework) crystal material synthesis and a sonodynamic antibacterial technology, in particular to an Eu-TCPP-SO4 crystal as well as a preparation method and application thereof. The rare earth-porphyrin complex Eu-TCPP-SO4 crystal with a specific crystal structure is constructed by virtue of coordination and self-assembly of europium nitrate pentahydrate, meso-tetra (4-carboxyl phenyl) porphyrin (TCPP) and sulfate ions. The Eu-TCPP-SO4 crystal disclosed by the invention as a sound-sensitive agent has high sound-sensitive activity and good stability, overcomes the limitations of low efficiency and poor stability of the sound-sensitive agent in the prior art, and can provide a safer and more effective solution for actual antibacterial application.

A europium-doped β-sialon phosphor particle. When the element concentration of a Si atom on the surface portion of the particle that is obtained by analyzing a cross section of the phosphor particle by the energy dispersive X-ray analysis method is indicated by Ps [at %], and the element concentration of a Si atom near the center of the particle that is obtained by an analysis by the same method is indicated by Pc [at %], the Pc-Ps value is 3 at % or more.

The invention discloses a composite bone repair material as well as a preparation method and application thereof, and belongs to the technical field of biomedical materials. The composite bone repair material comprises an etched cobalt magnesium europium molybdenum hydrotalcite nanosheet, calcium peroxide nanoparticles and an akermanite scaffold, the calcium peroxide nano-particles are loaded on the etched cobalt magnesium europium molybdenum hydrotalcite nano-sheets and are marked as a-CoMgEuMo-LDH (at) CaO2, and the a-CoMgEuMo-LDH (at) CaO2 is attached to the surface of the akermanite bracket and is marked as a-CoMgEuMo-LDH (at) CaO2-AKT. The composite bone repair material disclosed by the invention shows strong active oxygen generation capability, anti-tumor efficacy and osteogenic activity, has excellent biological safety, integrates anti-tumor and bone repair, and has a wide prospect in related operations.

The invention discloses a preparation method of an Eu-Tb-In-MOF material based on a dual fluorescence emission source type, and the preparation method specifically comprises the following steps: under a closed condition, uniformly mixing terbium nitrate hexahydrate, europium nitrate hexahydrate, indium nitrate pentahydrate, an organic ligand, N, N-dimethylformamide and acetonitrile, then adjusting the pH value of a mixed solution, and carrying out solvothermal reaction, washing, filtering and drying to obtain the Eu-Tb-In-MOF material. The invention also discloses an application of the Eu-Tb-In-MOF material in identification of heavy metal ions Cr in a water environment. The Cr (VI) ions in the water environment are detected through fluorescence quenching sensing, excellent high selectivity is shown, and interference of other single and mixed anions and cations in the water environment can be resisted.

The invention relates to a novel functional material for X-ray protection, in particular to a liquid metal flexible shielding material and a preparation method and application thereof. The material comprises liquid metal and solid metal, the liquid metal serves as a solvent to be filled in gaps of the solid metal, the liquid metal is gallium, gallium indium, gallium indium tin, gallium indium tin zinc or mercury, and the solid metal is selected from one or more of indium, tin, gold, platinum, iridium, zirconium, niobium, molybdenum, ruthenium, osmium, rhenium, rhodium, tungsten, antimony, palladium, tantalum, hafnium, lutetium, lead, ytterbium, thulium, bismuth, silver, erbium, holmium, dysprosium, terbium, gadolinium, samarium, neodymium, lanthanum, praseodymium, cerium and europium. On the basis of compounding of the liquid metal solvent and the solid metal solute based on the liquid metal combinatology, the liquid metal and the solid metal are jointly used for protecting X-ray radiation, the comprehensive performance of X-ray protection is improved, and meanwhile the variety and number range of selectable metal elements is widened.

The application belongs to the technical field of polyurea coating and specifically relates to a single-component high-performance polyurea coating and a preparation method thereof.The single-component high-performance polyurea coating comprises the following raw materials in parts by weight: diisocyanate 60-100 parts, diluent 30-50 parts, polyether polyol 100-140 parts, leveling agent 0.3-0.5 parts, defoaming agent 0.6-1 part, silane coupling agent 30-50 parts, chain extender 30-35 parts, catalyst 3-5 parts, europium-doped molybdenum sulfide coated with tin phytate 10-20 parts, and Cu3P@ZIF-7 5-15 parts.In the application, the europium-doped molybdenum sulfide coated with tin phytate and Cu3P@ZIF-7 are added, the interaction of the above components is utilized, the flame retardation and mechanical properties of the polyurea coating are promoted, the performance is excellent, and the application range is wide.

The invention relates to an ethylene glycol regulated rare earth europium doped Sr2LaF7 nano material as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, dissolving strontium chloride, lanthanum nitrate and europium nitrate in water to form a uniform solution; then adding ethylene glycol accounting for 20-70% of the volume of the deionized water, and regulating crystal growth by utilizing coordination of the ethylene glycol and metal ions; adding an ammonium fluoride or sodium fluoride solution, adjusting the pH value, and carrying out a hydrothermal reaction at 100-180 DEG C for 4-12 h; and finally, centrifuging, washing and drying to obtain a final product. Compared with the prior art, the morphology-controllable preparation of the Sr2LaF7 nano material is realized through directional regulation and control of ethylene glycol and a simple hydrothermal method, and the product has the advantages of high luminous intensity, uniform morphology and the like, and has an application prospect in the fields of fluorescence labeling and the like; the method is simple in process and low in cost.

The invention discloses a rare earth modified silicone rubber anti-radiation adhesive and a preparation method thereof, and the rare earth modified silicone rubber anti-radiation adhesive is prepared by mixing dealcoholized single-component room temperature vulcanized silicone rubber and an anti-radiation rare earth compound according to a ratio of 92-98 wt%: 2-8 wt%, the anti-radiation rare earth compound is prepared by mixing a mixed rare earth compound, deionized water and a composite rare earth coupling agent according to the mass ratio of 10: 90: 0.08, and the mixed rare earth compound is prepared by reacting raw materials including gadolinium chloride, samarium chloride, europium chloride, boric acid and deionized water. The neutron relative attenuation rate of the adhesive can reach 71-85%, the gamma ray relative attenuation rate of the adhesive can reach 88-95%, only microcracks appear on the surface after radiation, and the adhesive is easy to construct, can be used for aerospace circuit boards, equipment circuit boards in nuclear energy facilities and parts needing anti-radiation protection and the like, and has good practicability and popularization value.

A ceramic material, includes: a magnesium oxide and a doped oxide, wherein the doped oxide includes cobalt tetroxide, europium trioxide or manganese dioxide, and wherein a weight ratio of magnesium oxide to the doped oxide is 97:1 to 85:12. In addition, the disclosure also provides a method for manufacturing a ceramic material, including: mixing a magnesium oxide powder and a doped oxide powder, and sintering the mixed magnesium oxide powder and the doped oxide powder at a temperature of 1300° C. to 1650° C. to obtain the ceramic material, wherein the doped oxide powder includes a cobalt tetroxide powder, a europium trioxide powder or a manganese dioxide powder, and wherein a weight ratio of the magnesium oxide powder to the doped oxide powder is 99.9:0.1 to 92:8.

A novel europium-cerium flow battery electrolyte and its preparation method belong to the technical field of flow battery energy storage. The theoretical voltage of the novel europium-cerium flow battery is 1.9 V, with higher energy density and power density. The synthesis strategy is to add a chelating agent to a solution containing europium or cerium. The formed chelate has a large molecular size, avoiding cross-contamination caused by the transmembrane of active ions. The presence of the chelating agent can stabilize the reduced state of metal ions and slow down the oxidation reaction of the electrolyte with oxygen. The electrolyte has a low cost, is suitable for use in a neutral environment, and europium and cerium are rare earth metals with rich resource reserves, a complete industrial chain, advanced technology accumulation, and government policy support in China. When combined with a chelating agent to enhance its own redox kinetics, it can be widely applied to photovoltaic energy storage systems and also has broad application prospects in new energy vehicles.