67 results about "Cesium ions" patented technology

The invention belongs to the technical field of photovoltaic solar materials, and particularly relates to a high-conversion-efficiency perovskite precursor material and a preparation method thereof. The high-conversion-efficiency perovskite precursor material is composed of phenyl ammonium cesium composite cations, metal halide, an additive, a nuclear auxiliary agent and a solvent. By compounding phenylethyl ammonium iodide and cesium iodide, phenylammonium and cesium cations are introduced into perovskite crystal lattices, organic-inorganic balance of the material is optimized, phenylammonium promotes formation of a quasi-two-dimensional structure, and damp-heat stability is enhanced; cesium ions fill A-site gaps, so that crystal lattices are tighter, and the thermal stability and the photoelectric conversion efficiency are improved; the synergistic matching addition of the metal halide realizes band gap regulation and control and spectrum matching, and quaternary ammonium salt adjusts nucleation and grain growth, so that a uniform film structure is ensured, and defects are reduced; and guanidine salt passivates defects after crystal growth, stabilizes crystal lattices, and improves charge life and device efficiency.

The invention discloses a method for preparing an adsorption material for simultaneously extracting rubidium and cesium by using soft / hard template co-assembly and application, and belongs to the technical field of adsorption material preparation. The invention aims to solve the problems that a traditional adsorbent is poor in selectivity to similar alkali metal ions, slow in mass transfer rate, insufficient in acid environment stability and lack of an adsorption material for specific recognition of rubidium and cesium ions. The method comprises the following steps: 1, preparing cesium-imprinted hierarchical-pore mesoporous silica; 2, Cs / Rb-HMS is prepared; according to the invention, a macroporous-mesoporous channel is constructed; wherein a large hole (PS template) provides a rapid mass transmission channel, and an ion diffusion path is remarkably shortened, so that target ions can rapidly reach adsorption sites in the material; mesopores (Pluronic F127 template) provide a huge specific surface area and load a large number of Cs < + > imprinting sites and Rb < + > imprinting polymer layers, so that high adsorption capacity to Cs < + > and Rb < + > is ensured.

The invention provides a method and a device for preparing an adsorbent for adsorbing rubidium and cesium from lepidolite leachate. The preparation method of the adsorbent for adsorbing rubidium and cesium from the lepidolite leachate comprises the following steps: S1, weighing straw powder, and carrying out soda boiling treatment on the straw powder; s2, filtering while hot, collecting filter residues, washing with deionized water, and drying; s3, transferring the filter residues into a high-pressure kettle, and adding deionized water for hydrothermal reaction to obtain a reaction product. According to the preparation method and device of the adsorbent for adsorbing rubidium and cesium from the lepidolite leaching solution, the adsorbent has the effects of high adsorption capacity, good selectivity and stability in the aspect of rubidium and cesium adsorption, and the material can adsorb a large number of rubidium and cesium ions due to the rich pore structure and ion exchange sites; and the enrichment capacity on low-concentration rubidium and cesium is improved.

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.

The objective is to provide a method for dissolving solids that is excellent at dissolving solids generated in nuclear facilities. [Solution] A method for dissolving a solid generated at a nuclear facility, comprising dissolving the solid in a solution containing at least one of carbonate ions and bicarbonate ions, and at least one of potassium ions and cesium ions.

The present invention belongs to the field of the development of new adsorbents and comprehensive utilization of resources, and discloses a preparation method of an inorganic tin sulfide adsorbent and its application in cesium extraction. The adsorbent is synthesized by a hydrothermal method and has a lamellar structure. It has excellent ion exchange performance for alkali metal cesium ions in an aqueous solution and exhibits excellent adsorption selectivity. The adsorbed material can be regenerated, thus realizing the recycling of the adsorption material. The preparation process of the adsorption material provided by the present invention is simple and low in cost. Therefore, the adsorption material prepared by the present invention can be used for the extraction of cesium in geothermal water, salt lake brine, and underground brine, and can also be applied to the separation and extraction of cesium in solid cesium ore or associated ore leaching solutions.

The invention belongs to the field of selective adsorbents, and particularly relates to a rubidium and cesium ion selective adsorbent based on a graphene composite material and application thereof.The rubidium and cesium ion selective adsorbent is prepared by conducting surface carboxyl activation and crown ether grafting on the surface of a three-dimensional cross-linked graphene skeleton to obtain a crown ether functionalized graphene composite material; and performing in-situ growth of copper ferrocyanide nanoclusters on the crown ether functionalized graphene composite material. The rubidium cesium ion selective adsorbent realizes efficient selective adsorption of Rb < + > and Cs < + >, reaches adsorption equilibrium within 30 min in simulated high-level liquid waste, has Cs < + > and Rb < + > saturated adsorption capacities of 185 mg / g and 142 mg / g respectively, and has excellent acid-base stability and electrochemical regeneration capacity.

The embodiment of the invention provides a preparation method and application of a nickel potassium ferrocyanide template adsorbent. The method comprises the following steps: providing a cesium ferrocyanide solution; performing first mixing on the cesium ferrocyanide solution and a nickel source to obtain a cesium nickel ferrocyanide precursor; and carrying out second mixing on the cesium nickel ferrocyanide precursor and a potassium salt solution to obtain the potassium nickel ferrocyanide template adsorbent. The potassium nickel ferrocyanide template adsorbent prepared by the method disclosed by the invention has relatively good selective adsorption capacity on cesium ions in a cesium-containing solution, and is particularly suitable for adsorbing Cs < + > in a high-salt solution.

This invention discloses a low-dimensional layered wide-bandgap perovskite material, a wide-bandgap perovskite solar cell, and a method for preparing the same. The chemical formula of the low-dimensional layered wide-bandgap perovskite material is A2B. n‑ 1Pb n X 3n+1 Where A is at least one of 4-fluoro-phenylethylammonium ion, phenylethylammonium ion, butammonium ion, and octylammonium ion; B is at least one of methylamine ion, formamidinium ion, and cesium ion; X is at least one halide ion; and n is greater than 1 and less than 10. The low-dimensional layered wide-bandgap perovskite material provided by this invention exhibits excellent environmental stability, with a bandgap reaching 1.70 eV. The open-circuit voltage of perovskite solar cells based on this low-dimensional layered wide-bandgap perovskite material can reach 1.27 V at 0.1 cm⁻¹. 2 It achieves a photoelectric conversion efficiency of 20.18% within the effective area and exhibits good stability.

The present application relates to the field of adsorbing material, discloses a kind of rubidium cesium ion adsorbing material and its preparation method and application, the rubidium cesium ion adsorbing material includes framework and the organic sulfonate and / or organic sulfate modified metal ferricyanide adsorbent dispersed in the framework;The framework includes polyvinyl alcohol and crosslinked sodium alginate;The framework and the organic sulfonate and / or organic sulfate modified metal ferricyanide adsorbent are connected by amino-containing silane coupling agent.The rubidium cesium ion adsorbing material is not easy to fall off in long-term use process, metal ferricyanide adsorbent has high saturation adsorption capacity of rubidium and cesium and excellent stability.

The invention relates to an optical sensor for detecting Caesium ions and / or measuring concentration of the same in a fluid medium, comprising a resonant structure (1), a surface of which is covered by a layer of a macrocyclic compound (2). The invention further relates to a method for covering a surface of a resonant structure (1) of an optical sensor with a layer of a macrocyclic compound (2) such that the optical sensor is capable of detecting Caesium ions and / or measuring concentration of the same in a fluid medium.

The application belongs to the technical field of ion sieve, and discloses an ion sieve for adsorbing cesium ions and a preparation method thereof. 13 Then, the ion sieve for adsorbing cesium is obtained by immersing in an acid solution. The cesium ion sieve prepared by the high-temperature solid-phase method has good ion exchange selectivity for Cs+, high saturated exchange capacity, high crystallinity, pure product and good crystallization effect.

A simple and efficient method for preparing high-purity rubidium chloride includes the following steps: Adding crude rubidium salt to glacial acetic acid, heating and stirring to dissolve, filtering to remove insoluble impurities, yielding a crude rubidium salt solution in glacial acetic acid; adding a certain amount of antimony trichloride solution to the crude rubidium salt solution in glacial acetic acid, stirring the reaction to obtain a small amount of pale yellow precipitate and solution until the reaction reaches equilibrium, yielding a clear liquid and precipitate, the precipitate being used to prepare high-purity cesium salt; secondary precipitation: adding a certain amount of tin tetrachloride solution in glacial acetic acid to the clear liquid, stirring the reaction to obtain a white precipitate and solution; standing, filtering, and washing: cooling and standing the solution until the reaction reaches equilibrium, filtering, washing the precipitate with glacial acetic acid, yielding a precipitate and washing liquid; double salt decomposition: adding high-purity water to the precipitate to form a slurry, then adding ammonia to adjust the pH value, filtering to obtain tin hydroxide precipitate and rubidium chloride solution; sending the filtrate for testing: evaporating the qualified rubidium chloride solution to dryness, calcining to obtain rubidium chloride; recrystallization: obtaining the high-purity rubidium chloride product. It has the advantages of effectively removing cesium ions from crude rubidium salt and avoiding the influence of alkali metal ions on the purity of the final product, without loss, and with high product purity.

The present invention relates to a self-reactive Prussian blue material and a production method therefor, in which a separate magnetic synthesis process and an additional process of coating a Prussian blue material are not necessary. To this end, the present invention provides a self-reactive Prussian blue material in which a unit cell has a face-centered cubic (FCC) structure, bonds of water molecules present on branches of the lattice rebind with contaminants containing cesium ions, thereby enabling the contaminants to be adsorbed on the lattice structure by chemical adsorption, and a magnetic particle element and a Prussian blue material phase are simultaneously observed while the self-reactive Prussian blue material has an insoluble structure with respect to a solution containing the contaminants.

The application discloses a fluorescent material for rapidly detecting cesium ions in water, and a preparation method thereof is as follows: first, synthesizing carbon quantum dots (NCD) with positive charges on the surface through a hydrothermal method, and then preparing a 0.1-100 mg.mL ‑1 0.02-100 mg.mL ‑1 aqueous solution of a heteropoly acid. The surface of the formed composite material presents negative charges and the original strong fluorescence effect is inhibited to be weak fluorescence. When the water contains cesium ions capable of forming an association with the heteropoly acid anions, the heteropoly acid anions are "stolen" by the cesium ions, and then the strong fluorescence performance of the material is recovered, indicating that the water is polluted by containing the cesium ions. The fluorescent material is high in sensitivity, low in detection limit, rapid in detection and simple in operation, and is especially suitable for monitoring of cesium ion pollution in seawater.

The invention discloses a flame atomic absorption spectrum detection method for potassium element in a specific bulk drug, which comprises the following steps: adding cesium ions as an exclusive ionization inhibitor into a full detection system, optimizing the temperature gradient and pressure threshold of microwave digestion, and unifying the matrix composition of a blank solution, a standard solution and a test solution to realize efficient elimination of interference. An atomic absorption spectrophotometer is adopted for detection under the potassium element characteristic wavelength of 766.5 nm, the correlation coefficient of a standard curve stably reaches 0.999 or above, the relative standard deviation of a detection result is smaller than or equal to 3.0%, the potassium element content in a specific type of raw material medicine can be accurately measured, and the qualified judgment standard is that the potassium content is smaller than or equal to 0.2%. The method is suitable for production quality monitoring and finished product compliance checking of specific bulk drugs, has the advantages of high accuracy, safe operation and strong specificity, can provide a reliable quality control means for pharmaceutical enterprises, and fills the technical blank of high-precision detection of potassium elements in the specific bulk drugs.

The application provides a method for separating and enriching cesium in a solution and belongs to the technical field of hydrometallurgy. Under the action of an electric field, cesium ions are enriched by a selective Prussian blue diaphragm. The application draws lessons from the method of diaphragm electrolysis, combines the advantages of high selectivity of membrane separation and continuity of operation, and develops a method for continuously separating and enriching cesium from a water body under the electric driving. While realizing the industrial continuity operation, the efficient selective separation of cesium ions in the water body is ensured.

The application discloses an SCM-IC-1 molecular sieve composite material and a preparation method and application thereof. The SCM-IC-1 molecular sieve composite material comprises a silicon-aluminum porous crystal component, an ammonium phosphomolybdate component and a silicon-based binder component. The SCM-IC-1 molecular sieve composite material provided by the application can be used as an adsorption material for capturing and detecting metal ions in water bodies, especially for cesium ions, and has the technical effects of high capture rate and fast capture rate.

This invention relates to the field of cesium ion adsorption materials, specifically to an acid-controlled copper-based Prussian blue analogue, its preparation method, and its application. The invention provides a method for preparing an acid-controlled copper-based Prussian blue analogue, comprising: adding potassium ferrocyanide solution to a mixture of polyvinylpyrrolidone and a copper salt solution, followed by stirring and aging to obtain particulate copper-based Prussian blue analogue; adding the particulate copper-based Prussian blue analogue to a mixture of acid and N,N-dimethylformamide, followed by heating to obtain an acid-controlled copper-based Prussian blue analogue. This invention utilizes acid control to induce new structures and more adsorption sites in the copper-based Prussian blue analogue, thereby achieving selective and efficient adsorption of cesium ions in water, significantly reducing the interference of sodium ions on cesium ion adsorption, and making it more stable in solution.

The invention discloses an ytterbium-ion-doped quasi-two-dimensional perovskite near-infrared light-emitting thin film material and a preparation method and application thereof.According to the method, firstly, an ytterbium-ion-doped quasi-two-dimensional perovskite thin film is prepared, and efficient near-infrared quantum cutting emission can be achieved; the introduction of fluorophenylethylamine bromide can further improve the humidity stability of the material. Cesium ions are partially replaced by formamidine ions, the crystal quality of the film is improved, the phase distribution of the quasi-two-dimensional film is adjusted, the defects of a perovskite material are reduced, the energy transfer efficiency from a perovskite host to ytterbium ions is remarkably improved, the film can be applied to the photovoltaic field as a fluorescent layer and a fluorescent conversion layer, and preparation of high-performance photoelectric devices is achieved.

The application discloses a method for measuring hematite oxygen isotope based on secondary ion mass spectrometry, and comprises the following steps: using a secondary ion mass spectrometer, a hematite standard sample with known oxygen isotope is bombarded by a cesium ion source with a beam spot diameter of 15-25 mu m, 50 groups of measurements are performed, each group contains 40 times of 2-second cycles, the standard sample inter-group standard deviation and the standard sample inter-group average value are calculated; when the 2 times of the standard sample inter-group standard deviation is less than a preset threshold, the hematite standard sample with known oxygen isotope delta 18 O value and the standard sample inter-group average value are used to determine the instrument mass fractionation IMF; after the same depth measurement is performed on an unknown hematite sample, the instrument mass fractionation IMF and the unknown sample inter-group average value are used to calculate the hematite sample with unknown oxygen isotope delta 18 O value. Through comparative analysis of the fractionation characteristics and the instrument stability, the hematite oxygen isotope can be accurately measured. The method is rapid, efficient and reliable, and greatly improves the determination precision of the hematite oxygen isotope.

An object of the present invention is to provide a method for manufacturing a solar cell which is improved in manufacturing cost and ease. The present invention relates to a method for producing a solar cell having a photoelectric conversion layer containing a perovskite compound, the method comprising the steps of: + ), rubidium ion (Rb + ), cesium ions (Cs + ) and francium ion (Fr + the perovskite compound is a compound selected from the group consisting of cations of methyl cations, methyl cations of ...

This invention discloses an electrochemical carbon membrane reactor and its operating process for removing cesium ions from water, relating to the field of cesium ion separation. The device mainly includes a functional carbon membrane anode, a functional carbon membrane cathode, a regulated power supply, a water pump, sensors, and a casing. During operation, the cesium-containing solution to be treated is pumped from the raw water tank to port A, entering the anode chamber. It then sequentially penetrates the carbon membrane anode and cathode, reaching the cathode chamber and finally flowing into the product water tank from port B, yielding treated water. This invention utilizes both the electrostatic repulsion of the carbon membrane anode and the electrochemical adsorption of the carbon membrane cathode as core processes to remove cesium ions from water. Furthermore, the device's performance can be restored and regenerated through periodic removal of the concentrate and electrode reversal. This process has the advantages of simple equipment, simple operation steps, low production cost, and high cesium ion removal rate, and can be applied to the effective separation and removal of cesium ions in industrial wastewater, salt lake water, nuclear wastewater, seawater, and other water bodies.

The invention discloses a quinoxaline-5-carboxylic acid coordinated catalyst which has a general formula shown in the specification, b is a sodium ion, a magnesium ion, a calcium ion, an aluminum ion, a rubidium ion, a cesium ion, an ammonium ion, a tetradecyl dimethyl benzyl ammonium ion, a tetradecyl trimethyl ammonium ion, a hexadecyl trimethyl ammonium ion, a hexadecyl dimethyl benzyl ammonium ion, a tributyl octyl phosphonium ion, a tetrapropyl phosphonium ion, a dipropyl dibutyl phosphonium ion and a dibutyl dihexyl phosphonium ion; the phosphonium ions are tetraheptyl phosphonium ions, tetrabutyl phosphonium ions, tetrabenzyl phosphonium ions, tetraheptyl ammonium ions, dimethyl diethylammonium ions, benzyl trihexylammonium ions, tribenzyl phenyl phosphonium ions or tetraphenyl ammonium ions; m is Mo, Cr or W; r is alkyl with 1 to 25 carbon atoms; x is an integer between 1 and 20; and y is an integer between 1 and 40. The catalyst can improve the oxidation reaction selectivity and conversion rate of ortho-nitrotoluene.

The application discloses a Mo-containing molecular sieve and a preparation method and application thereof. n The chemical composition of the Mo-containing molecular sieve is xM2O*ySiO2*xAl2O3*zMoO, and satisfies 0.005<=x / y<=0.2 and 5<=y / z<=80 in terms of moles; n is the total number of oxygen atoms required to satisfy the valence of elements in the molybdenum oxide; and M is selected from Na or K. The molecular sieve has a novel molecular sieve composition and structure, can be used as an adsorption material to capture and detect metal ions in a water body, especially cesium ions, and has the technical effects of high capture rate and fast capture speed.

The invention provides a cesium-containing wastewater treatment method and an electrochemical deposition film preparation method and system, and relates to the field of cesium-containing wastewater treatment. The cesium-containing wastewater treatment method comprises the following steps: S1, preparing a CuHCF ink film; s2, a three-electrode system is constructed, specifically, the CuHCF ink film serves as a working electrode, a platinum sheet serves as a counter electrode, a saturated calomel electrode serves as a reference electrode, and the three-electrode system is formed; s3, the cesium-containing wastewater is input into equipment provided with a three-electrode system, and the three-electrode system works to remove cesium in the cesium-containing wastewater. According to the cesium-containing wastewater treatment method and the electrochemical deposition film preparation method and system, efficient and reversible cesium ion capture is achieved through the synergistic effect of ion exchange and electrochemical driving. The method has the advantages of high selectivity, rapid dynamics, environmental friendliness and flexible adaptation capability, and a sustainable solution is provided for radioactive wastewater treatment.

The invention discloses a COF membrane, a preparation method thereof and application of the COF membrane in cesium-sodium separation. The preparation method of the COF membrane comprises the following steps: preparing carboxyl COF nanosheet water-phase colloid by a three-phase method; activating the carboxyl COF nanosheet water-phase colloid by EDC / NHSs to prepare a crown ether modified COF nanosheet solution; and preparing the crown ether modified COF membrane on the surface of the substrate membrane through vacuum-assisted self-assembly suction filtration. The method has the advantages that the introduction of the crown ether effectively reduces the aperture of the COF to prevent all hydrated ions from passing through, and meanwhile, the crown ether selectively recognizes sodium ions to ensure that the sodium ions pass through a crown ether cavity in a bare ion form and then pass through a membrane while cesium ions are intercepted.

This application belongs to the field of photodetector technology, and relates to composite thin films and their preparation methods, preparation methods of A4BX6 crystals, and photodetectors. The composite thin film includes a first film layer and a second film layer. The material of the first film layer includes ABX3, and the material of the second film layer includes A4BX6; wherein A is selected from at least one of cesium ions, formamidinium ions, methylammonium ions, n-octylammonium ions, phenylethylammonium ions, benzylammonium ions, and tert-butylammonium ions; B is selected from at least one of lead ions and tin ions; and X is selected from at least one of iodide ions, bromide ions, and chloride ions. The composite thin film provided by this application simultaneously possesses high electron transport efficiency and high ultraviolet light sensitivity.

The invention relates to the technical field of preparation of inorganic-organic composite functional materials, and relates to a preparation method of an MFCs-coated E-ZrP composite adsorbent and a separation membrane thereof, and the method comprises the following steps: firstly, carrying out intercalation stripping on alpha-zirconium phosphate by using trihydroxymethyl aminomethane through a colloid assembly intercalation method to prepare a water-based E-ZrP dispersion liquid; then transition metal chloride and potassium ferrocyanide are sequentially introduced into the water-based E-ZrP dispersion liquid, metal ferrocyanide is generated through an in-situ reaction, and the MFCs-coated E-ZrP composite adsorbent is obtained; and blending the composite adsorbent with a high-molecular polymer, and preparing the MFCs-coated E-ZrP composite separation membrane by adopting a non-solvent induced phase separation technology. The composite adsorbent and the separation membrane prepared by the invention have high selective adsorption capacity and excellent structural stability on rubidium and cesium ions, and can be widely applied to the fields of separation and extraction of rubidium and cesium in salt lake brine, underground brine and geothermal water, removal of cesium ions in radioactive wastewater and the like.